Nearly rewrote expr-eval to be compatible as an ECMAScript module, the last blocker for many bugs and JS tests!

commit f91538de446ef0e497ec7e87e2729f504a4172cb
Author: Ad5001 <mail@ad5001.eu>
Date:   Sun Sep 22 05:55:12 2024 +0200

    Converted expr-eval back to regular JS!

commit 23c346f6c65b5b5c4bb4ad610f0554bd1d9a3700
Author: Ad5001 <mail@ad5001.eu>
Date:   Sun Sep 22 05:06:59 2024 +0200

    Reformatting

commit 66608c980fd44f26ae8e6855ecd5fc3e7db55a7b
Author: Ad5001 <mail@ad5001.eu>
Date:   Sun Sep 22 05:04:27 2024 +0200

    Removed all 'var's

commit 545886fd38c99cf11bc576caa40bec0d7fe0ac30
Author: Ad5001 <mail@ad5001.eu>
Date:   Sun Sep 22 04:53:32 2024 +0200

    Removing function definition

commit 489602b24bb70cb6ad782871e269a22c92fcf072
Author: Ad5001 <mail@ad5001.eu>
Date:   Sun Sep 22 04:51:21 2024 +0200

    Removing semicolons

commit 3ee069edbeb8ebfb5c7d15d319014f7a085ff623
Author: Ad5001 <mail@ad5001.eu>
Date:   Sun Sep 22 04:49:32 2024 +0200

    Converting all classes to ECMAScript classes

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/LogarithmPlotter.qml

@@ -23,7 +23,7 @@ import QtQuick.Layouts 1.12
 import QtQuick
 
 // Auto loading all modules.
-import "js/autoload.js" as ModulesAutoload
+import "js/autoload.mjs" as ModulesAutoload
 
 import eu.ad5001.LogarithmPlotter.History 1.0
 import eu.ad5001.LogarithmPlotter.ObjectLists 1.0

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/autoload.js

@@ -1,10 +0,0 @@
-
-// Loading modules in order
-.import "objects.mjs" as Objects
-.import "lib/expr-eval/integration.js" as ExprParser
-.import "objs/autoload.mjs" as Autoload
-.import "math/latex.mjs" as Latex
-.import "history/common.mjs" as HistoryCommon
-.import "canvas.mjs" as CanvasAPI
-.import "io.mjs" as IOAPI
-.import "preferences.mjs" as PreferencesAPI

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/autoload.mjs

@@ -0,0 +1,27 @@
+/**
+ *  LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
+ *  Copyright (C) 2021-2024  Ad5001
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+// Loading modules in order
+import * as Objects from "./objects.mjs"
+import * as ExprParser from "./lib/expr-eval/integration.mjs"
+import * as ObjsAutoload from "./objs/autoload.mjs"
+import * as Latex from "./math/latex.mjs"
+import * as HistoryCommon from "./history/common.mjs"
+import * as CanvasAPI from "./canvas.mjs"
+import * as IOAPI from "./io.mjs"
+import * as PreferencesAPI from "./preferences.mjs"

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/expression.mjs

@@ -0,0 +1,540 @@
+/**
+ * Based on ndef.parser, by Raphael Graf <r@undefined.ch>
+ * http://www.undefined.ch/mparser/index.html
+ *
+ * Ported to JavaScript and modified by Matthew Crumley <email@matthewcrumley.com>
+ * https://silentmatt.com/javascript-expression-evaluator/
+ *
+ * Ported to QMLJS with modifications done accordingly done by Ad5001 <mail@ad5001.eu> (https://ad5001.eu)
+ *
+ * Copyright (c) 2015 Matthew Crumley, 2021-2024 Ad5001
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
+ * to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
+ * but don't feel like you have to let me know or ask permission.
+ */
+
+import {
+    Instruction,
+    IOP3, IOP2, IOP1,
+    INUMBER, IARRAY,
+    IVAR, IVARNAME,
+    IEXPR, IEXPREVAL,
+    IMEMBER, IFUNCALL,
+    IENDSTATEMENT,
+    unaryInstruction, binaryInstruction, ternaryInstruction
+} from "./instruction.mjs"
+
+/**
+ * Simplifies the given instructions
+ * @param {Instruction[]} tokens
+ * @param {Record.<string, function(any): any>} unaryOps
+ * @param {Record.<string, function(any, any): any>} binaryOps
+ * @param {Record.<string, function(any, any, any): any>} ternaryOps
+ * @param {Record.<string, any>} values
+ * @return {Instruction[]}
+ */
+function simplify(tokens, unaryOps, binaryOps, ternaryOps, values) {
+    const nstack = []
+    const newexpression = []
+    let n1, n2, n3
+    let f
+    for(let i = 0; i < tokens.length; i++) {
+        let item = tokens[i]
+        const type = item.type
+        if(type === INUMBER || type === IVARNAME) {
+            if(Array.isArray(item.value)) {
+                nstack.push.apply(nstack, simplify(item.value.map(function(x) {
+                    return new Instruction(INUMBER, x)
+                }).concat(new Instruction(IARRAY, item.value.length)), unaryOps, binaryOps, ternaryOps, values))
+            } else {
+                nstack.push(item)
+            }
+        } else if(type === IVAR && values.hasOwnProperty(item.value)) {
+            item = new Instruction(INUMBER, values[item.value])
+            nstack.push(item)
+        } else if(type === IOP2 && nstack.length > 1) {
+            n2 = nstack.pop()
+            n1 = nstack.pop()
+            f = binaryOps[item.value]
+            item = new Instruction(INUMBER, f(n1.value, n2.value))
+            nstack.push(item)
+        } else if(type === IOP3 && nstack.length > 2) {
+            n3 = nstack.pop()
+            n2 = nstack.pop()
+            n1 = nstack.pop()
+            if(item.value === "?") {
+                nstack.push(n1.value ? n2.value : n3.value)
+            } else {
+                f = ternaryOps[item.value]
+                item = new Instruction(INUMBER, f(n1.value, n2.value, n3.value))
+                nstack.push(item)
+            }
+        } else if(type === IOP1 && nstack.length > 0) {
+            n1 = nstack.pop()
+            f = unaryOps[item.value]
+            item = new Instruction(INUMBER, f(n1.value))
+            nstack.push(item)
+        } else if(type === IEXPR) {
+            while(nstack.length > 0) {
+                newexpression.push(nstack.shift())
+            }
+            newexpression.push(new Instruction(IEXPR, simplify(item.value, unaryOps, binaryOps, ternaryOps, values)))
+        } else if(type === IMEMBER && nstack.length > 0) {
+            n1 = nstack.pop()
+            if(item.value in n1.value)
+                nstack.push(new Instruction(INUMBER, n1.value[item.value]))
+            else
+                throw new Error(qsTranslate("error", "Cannot find property %1 of object %2.").arg(item.value).arg(n1))
+        } else {
+            while(nstack.length > 0) {
+                newexpression.push(nstack.shift())
+            }
+            newexpression.push(item)
+        }
+    }
+    while(nstack.length > 0) {
+        newexpression.push(nstack.shift())
+    }
+    return newexpression
+}
+
+/**
+ * In the given instructions, replaces variable by expr.
+ * @param {Instruction[]} tokens
+ * @param {string} variable
+ * @param {number} expr
+ * @return {Instruction[]}
+ */
+function substitute(tokens, variable, expr) {
+    const newexpression = []
+    for(let i = 0; i < tokens.length; i++) {
+        let item = tokens[i]
+        const type = item.type
+        if(type === IVAR && item.value === variable) {
+            for(let j = 0; j < expr.tokens.length; j++) {
+                const expritem = expr.tokens[j]
+                let replitem
+                if(expritem.type === IOP1) {
+                    replitem = unaryInstruction(expritem.value)
+                } else if(expritem.type === IOP2) {
+                    replitem = binaryInstruction(expritem.value)
+                } else if(expritem.type === IOP3) {
+                    replitem = ternaryInstruction(expritem.value)
+                } else {
+                    replitem = new Instruction(expritem.type, expritem.value)
+                }
+                newexpression.push(replitem)
+            }
+        } else if(type === IEXPR) {
+            newexpression.push(new Instruction(IEXPR, substitute(item.value, variable, expr)))
+        } else {
+            newexpression.push(item)
+        }
+    }
+    return newexpression
+}
+
+/**
+ * Evaluates the given instructions for a given Expression with given values.
+ * @param {Instruction[]} tokens
+ * @param {Expression} expr
+ * @param {Record.<string, number>} values
+ * @return {number}
+ */
+function evaluate(tokens, expr, values) {
+    const nstack = []
+    let n1, n2, n3
+    let f, args, argCount
+
+    if(isExpressionEvaluator(tokens)) {
+        return resolveExpression(tokens, values)
+    }
+
+    for(let i = 0; i < tokens.length; i++) {
+        const item = tokens[i]
+        const type = item.type
+        if(type === INUMBER || type === IVARNAME) {
+            nstack.push(item.value)
+        } else if(type === IOP2) {
+            n2 = nstack.pop()
+            n1 = nstack.pop()
+            if(item.value === "and") {
+                nstack.push(n1 ? !!evaluate(n2, expr, values) : false)
+            } else if(item.value === "or") {
+                nstack.push(n1 ? true : !!evaluate(n2, expr, values))
+            } else if(item.value === "=") {
+                f = expr.binaryOps[item.value]
+                nstack.push(f(n1, evaluate(n2, expr, values), values))
+            } else {
+                f = expr.binaryOps[item.value]
+                nstack.push(f(resolveExpression(n1, values), resolveExpression(n2, values)))
+            }
+        } else if(type === IOP3) {
+            n3 = nstack.pop()
+            n2 = nstack.pop()
+            n1 = nstack.pop()
+            if(item.value === "?") {
+                nstack.push(evaluate(n1 ? n2 : n3, expr, values))
+            } else {
+                f = expr.ternaryOps[item.value]
+                nstack.push(f(resolveExpression(n1, values), resolveExpression(n2, values), resolveExpression(n3, values)))
+            }
+        } else if(type === IVAR) {
+            // Check for variable value
+            if(/^__proto__|prototype|constructor$/.test(item.value)) {
+                throw new Error("WARNING: Prototype access detected and denied. If you downloaded this file from the internet, this file might be a virus.")
+            } else if(item.value in expr.functions) {
+                nstack.push(expr.functions[item.value])
+            } else if(item.value in expr.unaryOps && expr.parser.isOperatorEnabled(item.value)) {
+                nstack.push(expr.unaryOps[item.value])
+            } else {
+                const v = values[item.value]
+                if(v !== undefined) {
+                    nstack.push(v)
+                } else {
+                    throw new Error(qsTranslate("error", "Undefined variable %1.").arg(item.value))
+                }
+            }
+        } else if(type === IOP1) {
+            n1 = nstack.pop()
+            f = expr.unaryOps[item.value]
+            nstack.push(f(resolveExpression(n1, values)))
+        } else if(type === IFUNCALL) {
+            argCount = item.value
+            args = []
+            while(argCount-- > 0) {
+                args.unshift(resolveExpression(nstack.pop(), values))
+            }
+            f = nstack.pop()
+            if(f.apply && f.call) {
+                nstack.push(f.apply(undefined, args))
+            } else if(f.execute) {
+                // Objects & expressions execution
+                if(args.length >= 1)
+                    nstack.push(f.execute.apply(f, args))
+                else
+                    throw new Error(qsTranslate("error", "In order to be executed, object %1 must have at least one argument.").arg(f))
+            } else {
+                throw new Error(qsTranslate("error", "%1 cannot be executed.").arg(f))
+            }
+        } else if(type === IEXPR) {
+            nstack.push(createExpressionEvaluator(item, expr))
+        } else if(type === IEXPREVAL) {
+            nstack.push(item)
+        } else if(type === IMEMBER) {
+            n1 = nstack.pop()
+            if(item.value in n1)
+                if(n1[item.value].execute && n1[item.value].cached)
+                    nstack.push(n1[item.value].execute())
+                else
+                    nstack.push(n1[item.value])
+            else
+                throw new Error(qsTranslate("error", "Cannot find property %1 of object %2.").arg(item.value).arg(n1))
+        } else if(type === IENDSTATEMENT) {
+            nstack.pop()
+        } else if(type === IARRAY) {
+            argCount = item.value
+            args = []
+            while(argCount-- > 0) {
+                args.unshift(nstack.pop())
+            }
+            nstack.push(args)
+        } else {
+            throw new Error(qsTranslate("error", "Invalid expression."))
+        }
+    }
+    if(nstack.length > 1) {
+        throw new Error(qsTranslate("error", "Invalid expression (parity)."))
+    }
+    // Explicitly return zero to avoid test issues caused by -0
+    return nstack[0] === 0 ? 0 : resolveExpression(nstack[0], values)
+}
+
+function createExpressionEvaluator(token, expr) {
+    if(isExpressionEvaluator(token)) return token
+    return {
+        type: IEXPREVAL,
+        value: function(scope) {
+            return evaluate(token.value, expr, scope)
+        }
+    }
+}
+
+function isExpressionEvaluator(n) {
+    return n && n.type === IEXPREVAL
+}
+
+function resolveExpression(n, values) {
+    return isExpressionEvaluator(n) ? n.value(values) : n
+}
+
+/**
+ * Converts the given instructions to a string
+ * If toJS is active, can be evaluated with eval, otherwise it can be reparsed by the parser.
+ * @param {Instruction[]} tokens
+ * @param {boolean} toJS
+ * @return {string}
+ */
+function expressionToString(tokens, toJS) {
+    let nstack = []
+    let n1, n2, n3
+    let f, args, argCount
+    for(let i = 0; i < tokens.length; i++) {
+        const item = tokens[i]
+        const type = item.type
+        if(type === INUMBER) {
+            if(typeof item.value === "number" && item.value < 0) {
+                nstack.push("(" + item.value + ")")
+            } else if(Array.isArray(item.value)) {
+                nstack.push("[" + item.value.map(escapeValue).join(", ") + "]")
+            } else {
+                nstack.push(escapeValue(item.value))
+            }
+        } else if(type === IOP2) {
+            n2 = nstack.pop()
+            n1 = nstack.pop()
+            f = item.value
+            if(toJS) {
+                if(f === "^") {
+                    nstack.push("Math.pow(" + n1 + ", " + n2 + ")")
+                } else if(f === "and") {
+                    nstack.push("(!!" + n1 + " && !!" + n2 + ")")
+                } else if(f === "or") {
+                    nstack.push("(!!" + n1 + " || !!" + n2 + ")")
+                } else if(f === "||") {
+                    nstack.push("(function(a,b){ return Array.isArray(a) && Array.isArray(b) ? a.concat(b) : String(a) + String(b); }((" + n1 + "),(" + n2 + ")))")
+                } else if(f === "==") {
+                    nstack.push("(" + n1 + " === " + n2 + ")")
+                } else if(f === "!=") {
+                    nstack.push("(" + n1 + " !== " + n2 + ")")
+                } else if(f === "[") {
+                    nstack.push(n1 + "[(" + n2 + ") | 0]")
+                } else {
+                    nstack.push("(" + n1 + " " + f + " " + n2 + ")")
+                }
+            } else {
+                if(f === "[") {
+                    nstack.push(n1 + "[" + n2 + "]")
+                } else {
+                    nstack.push("(" + n1 + " " + f + " " + n2 + ")")
+                }
+            }
+        } else if(type === IOP3) {
+            n3 = nstack.pop()
+            n2 = nstack.pop()
+            n1 = nstack.pop()
+            f = item.value
+            if(f === "?") {
+                nstack.push("(" + n1 + " ? " + n2 + " : " + n3 + ")")
+            } else {
+                throw new Error(qsTranslate("error", "Invalid expression."))
+            }
+        } else if(type === IVAR || type === IVARNAME) {
+            nstack.push(item.value)
+        } else if(type === IOP1) {
+            n1 = nstack.pop()
+            f = item.value
+            if(f === "-" || f === "+") {
+                nstack.push("(" + f + n1 + ")")
+            } else if(toJS) {
+                if(f === "not") {
+                    nstack.push("(" + "!" + n1 + ")")
+                } else if(f === "!") {
+                    nstack.push("fac(" + n1 + ")")
+                } else {
+                    nstack.push(f + "(" + n1 + ")")
+                }
+            } else if(f === "!") {
+                nstack.push("(" + n1 + "!)")
+            } else {
+                nstack.push("(" + f + " " + n1 + ")")
+            }
+        } else if(type === IFUNCALL) {
+            argCount = item.value
+            args = []
+            while(argCount-- > 0) {
+                args.unshift(nstack.pop())
+            }
+            f = nstack.pop()
+            nstack.push(f + "(" + args.join(", ") + ")")
+        } else if(type === IMEMBER) {
+            n1 = nstack.pop()
+            nstack.push(n1 + "." + item.value)
+        } else if(type === IARRAY) {
+            argCount = item.value
+            args = []
+            while(argCount-- > 0) {
+                args.unshift(nstack.pop())
+            }
+            nstack.push("[" + args.join(", ") + "]")
+        } else if(type === IEXPR) {
+            nstack.push("(" + expressionToString(item.value, toJS) + ")")
+        } else if(type === IENDSTATEMENT) {
+
+        } else {
+            throw new Error(qsTranslate("error", "Invalid expression."))
+        }
+    }
+    if(nstack.length > 1) {
+        if(toJS) {
+            nstack = [nstack.join(",")]
+        } else {
+            nstack = [nstack.join(";")]
+        }
+    }
+    return String(nstack[0])
+}
+
+export function escapeValue(v) {
+    if(typeof v === "string") {
+        return JSON.stringify(v).replace(/\u2028/g, "\\u2028").replace(/\u2029/g, "\\u2029")
+    }
+    return v
+}
+
+/**
+ * Pushes all symbols from tokens into the symbols array.
+ * @param {Instruction[]} tokens
+ * @param {string[]} symbols
+ * @param {{withMembers: (boolean|undefined)}}options
+ */
+function getSymbols(tokens, symbols, options) {
+    options = options || {}
+    const withMembers = !!options.withMembers
+    let prevVar = null
+
+    for(let i = 0; i < tokens.length; i++) {
+        const item = tokens[i]
+        if(item.type === IVAR || item.type === IVARNAME) {
+            if(!withMembers && !symbols.includes(item.value)) {
+                symbols.push(item.value)
+            } else if(prevVar !== null) {
+                if(!symbols.includes(prevVar)) {
+                    symbols.push(prevVar)
+                }
+                prevVar = item.value
+            } else {
+                prevVar = item.value
+            }
+        } else if(item.type === IMEMBER && withMembers && prevVar !== null) {
+            prevVar += "." + item.value
+        } else if(item.type === IEXPR) {
+            getSymbols(item.value, symbols, options)
+        } else if(prevVar !== null) {
+            if(!symbols.includes(prevVar)) {
+                symbols.push(prevVar)
+            }
+            prevVar = null
+        }
+    }
+
+    if(prevVar !== null && !symbols.includes(prevVar)) {
+        symbols.push(prevVar)
+    }
+}
+
+export class Expression {
+    /**
+     * @param {Instruction[]} tokens
+     * @param {Parser} parser
+     */
+    constructor(tokens, parser) {
+        this.tokens = tokens
+        this.parser = parser
+        this.unaryOps = parser.unaryOps
+        this.binaryOps = parser.binaryOps
+        this.ternaryOps = parser.ternaryOps
+        this.functions = parser.functions
+    }
+
+    /**
+     * Simplifies the expression.
+     * @param {Object<string, number|Expression>|undefined} values
+     * @returns {Expression}
+     */
+    simplify(values) {
+        values = values || {}
+        return new Expression(simplify(this.tokens, this.unaryOps, this.binaryOps, this.ternaryOps, values), this.parser)
+    }
+
+    /**
+     * Creates a new expression where the variable is substituted by the given expression.
+     * @param {string} variable
+     * @param {string|Expression} expr
+     * @returns {Expression}
+     */
+    substitute(variable, expr) {
+        if(!(expr instanceof Expression)) {
+            expr = this.parser.parse(String(expr))
+        }
+
+        return new Expression(substitute(this.tokens, variable, expr), this.parser)
+    }
+
+    /**
+     * Calculates the value of the expression by giving all variables and their corresponding values.
+     * @param {Object<string, number>} values
+     * @returns {number}
+     */
+    evaluate(values) {
+        values = Object.assign({}, values, this.parser.consts)
+        return evaluate(this.tokens, this, values)
+    }
+
+    /**
+     * Returns a list of symbols (string of characters) in the expressions.
+     * Can be functions, constants, or variables.
+     * @returns {string[]}
+     */
+    symbols(options) {
+        options = options || {}
+        const vars = []
+        getSymbols(this.tokens, vars, options)
+        return vars
+    }
+
+    toString() {
+        return expressionToString(this.tokens, false)
+    }
+
+
+    /**
+     * Returns the list of symbols (string of characters) which are not defined
+     * as constants or functions.
+     * @returns {string[]}
+     */
+    variables(options) {
+        options = options || {}
+        const vars = []
+        getSymbols(this.tokens, vars, options)
+        const functions = this.functions
+        const consts = this.parser.consts
+        return vars.filter((name) => {
+            return !(name in functions) && !(name in consts)
+        })
+    }
+
+
+    /**
+     * Converts the expression to a JS function.
+     * @param {string} param - Parsed variables for the function.
+     * @param {Object.<string, (Expression|string)>} variables - Default variables to provide.
+     * @returns {function(...any)}
+     */
+    toJSFunction(param, variables) {
+        const expr = this
+        const f = new Function(param, "with(this.functions) with (this.ternaryOps) with (this.binaryOps) with (this.unaryOps) { return " + expressionToString(this.simplify(variables).tokens, true) + "; }") // eslint-disable-line no-new-func
+        return function() {
+            return f.apply(expr, arguments)
+        }
+    }
+}

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/instruction.mjs

@@ -0,0 +1,82 @@
+/**
+ * Based on ndef.parser, by Raphael Graf <r@undefined.ch>
+ * http://www.undefined.ch/mparser/index.html
+ *
+ * Ported to JavaScript and modified by Matthew Crumley <email@matthewcrumley.com>
+ * https://silentmatt.com/javascript-expression-evaluator/
+ *
+ * Ported to QMLJS with modifications done accordingly done by Ad5001 <mail@ad5001.eu> (https://ad5001.eu)
+ *
+ * Copyright (c) 2015 Matthew Crumley, 2021-2024 Ad5001
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
+ * to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
+ * but don't feel like you have to let me know or ask permission.
+ */
+
+export const INUMBER = "INUMBER"
+export const IOP1 = "IOP1"
+export const IOP2 = "IOP2"
+export const IOP3 = "IOP3"
+export const IVAR = "IVAR"
+export const IVARNAME = "IVARNAME"
+export const IFUNCALL = "IFUNCALL"
+export const IEXPR = "IEXPR"
+export const IEXPREVAL = "IEXPREVAL"
+export const IMEMBER = "IMEMBER"
+export const IENDSTATEMENT = "IENDSTATEMENT"
+export const IARRAY = "IARRAY"
+
+
+export class Instruction {
+    /**
+     *
+     * @param {string} type
+     * @param {any} value
+     */
+    constructor(type, value) {
+        this.type = type
+        this.value = (value !== undefined && value !== null) ? value : 0
+    }
+
+    toString() {
+        switch(this.type) {
+            case INUMBER:
+            case IOP1:
+            case IOP2:
+            case IOP3:
+            case IVAR:
+            case IVARNAME:
+            case IENDSTATEMENT:
+                return this.value
+            case IFUNCALL:
+                return "CALL " + this.value
+            case IARRAY:
+                return "ARRAY " + this.value
+            case IMEMBER:
+                return "." + this.value
+            default:
+                return "Invalid Instruction"
+        }
+    }
+}
+
+export function unaryInstruction(value) {
+    return new Instruction(IOP1, value)
+}
+
+export function binaryInstruction(value) {
+    return new Instruction(IOP2, value)
+}
+
+export function ternaryInstruction(value) {
+    return new Instruction(IOP3, value)
+}

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/integration.mjs

@@ -1,25 +1,23 @@
 /**
  *  LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
  *  Copyright (C) 2021-2024  Ad5001
- * 
+ *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation, either version 3 of the License, or
  *  (at your option) any later version.
- * 
+ *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
- * 
+ *
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-.pragma library
+import { Module } from "../../modules.mjs"
-
+import { Parser } from "./parser.mjs"
-.import "expr-eval.js" as ExprEval
-.import "../../modules.mjs" as M
 
 const evalVariables = {
     // Variables not provided by expr-eval.js, needs to be provided manually
@@ -36,15 +34,14 @@ const evalVariables = {
     "false": false
 }
 
-class ExprParserAPI extends M.Module {
+export class ExprParserAPI extends Module {
     constructor() {
-        super('ExprParser', [
+        super("ExprParser", [
             /** @type {ObjectsAPI} */
             Modules.Objects
         ])
         this.currentVars = {}
-        this.Internals = ExprEval
+        this._parser = new Parser()
-        this._parser = new ExprEval.Parser()
 
         this._parser.consts = Object.assign({}, this._parser.consts, evalVariables)
 
@@ -65,18 +62,18 @@ class ExprParserAPI extends M.Module {
         if(args.length === 1) {
             // Parse object
             f = args[0]
-            if(typeof f !== 'object' || !f.execute)
+            if(typeof f !== "object" || !f.execute)
-                throw EvalError(qsTranslate('usage', 'Usage: %1').arg(usage1))
+                throw EvalError(qsTranslate("usage", "Usage: %1").arg(usage1))
             let target = f
             f = (x) => target.execute(x)
         } else if(args.length === 2) {
             // Parse variable
-            [f,variable] = args
+            [f, variable] = args
-            if(typeof f !== 'string' || typeof variable !== 'string')
+            if(typeof f !== "string" || typeof variable !== "string")
-                throw EvalError(qsTranslate('usage', 'Usage: %1').arg(usage2))
+                throw EvalError(qsTranslate("usage", "Usage: %1").arg(usage2))
             f = this._parser.parse(f).toJSFunction(variable, this.currentVars)
         } else
-            throw EvalError(qsTranslate('usage', 'Usage: %1 or\n%2').arg(usage1).arg(usage2))
+            throw EvalError(qsTranslate("usage", "Usage: %1 or\n%2").arg(usage1).arg(usage2))
         return f
     }
 
@@ -88,27 +85,27 @@ class ExprParserAPI extends M.Module {
     }
 
     integral(a, b, ...args) {
-        let usage1 = qsTranslate('usage', 'integral(<from: number>, <to: number>, <f: ExecutableObject>)')
+        let usage1 = qsTranslate("usage", "integral(<from: number>, <to: number>, <f: ExecutableObject>)")
-        let usage2 = qsTranslate('usage', 'integral(<from: number>, <to: number>, <f: string>, <variable: string>)')
+        let usage2 = qsTranslate("usage", "integral(<from: number>, <to: number>, <f: string>, <variable: string>)")
         let f = this.parseArgumentsForFunction(args, usage1, usage2)
         if(a == null || b == null)
-            throw EvalError(qsTranslate('usage', 'Usage: %1 or\n%2').arg(usage1).arg(usage2))
+            throw EvalError(qsTranslate("usage", "Usage: %1 or\n%2").arg(usage1).arg(usage2))
 
         // https://en.wikipedia.org/wiki/Simpson%27s_rule
         // Simpler, faster than tokenizing the expression
-        return (b-a)/6*(f(a)+4*f((a+b)/2)+f(b))
+        return (b - a) / 6 * (f(a) + 4 * f((a + b) / 2) + f(b))
     }
 
     derivative(...args) {
-        let usage1 = qsTranslate('usage', 'derivative(<f: ExecutableObject>, <x: number>)')
+        let usage1 = qsTranslate("usage", "derivative(<f: ExecutableObject>, <x: number>)")
-        let usage2 = qsTranslate('usage', 'derivative(<f: string>, <variable: string>, <x: number>)')
+        let usage2 = qsTranslate("usage", "derivative(<f: string>, <variable: string>, <x: number>)")
         let x = args.pop()
         let f = this.parseArgumentsForFunction(args, usage1, usage2)
         if(x == null)
-            throw EvalError(qsTranslate('usage', 'Usage: %1 or\n%2').arg(usage1).arg(usage2))
+            throw EvalError(qsTranslate("usage", "Usage: %1 or\n%2").arg(usage1).arg(usage2))
 
-        let derivative_precision = x/10
+        let derivative_precision = x / 10
-        return (f(x+derivative_precision/2)-f(x-derivative_precision/2))/derivative_precision
+        return (f(x + derivative_precision / 2) - f(x - derivative_precision / 2)) / derivative_precision
     }
 }
 

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/parser.mjs

@@ -0,0 +1,172 @@
+/**
+ * Based on ndef.parser, by Raphael Graf <r@undefined.ch>
+ * http://www.undefined.ch/mparser/index.html
+ *
+ * Ported to JavaScript and modified by Matthew Crumley <email@matthewcrumley.com>
+ * https://silentmatt.com/javascript-expression-evaluator/
+ *
+ * Ported to QMLJS with modifications done accordingly done by Ad5001 <mail@ad5001.eu> (https://ad5001.eu)
+ *
+ * Copyright (c) 2015 Matthew Crumley, 2021-2024 Ad5001
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
+ * to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
+ * but don't feel like you have to let me know or ask permission.
+ */
+
+import * as Polyfill from "./polyfill.mjs"
+import { ParserState } from "./parserstate.mjs"
+import { TEOF, TokenStream } from "./tokens.mjs"
+import { Expression } from "./expression.mjs"
+
+const optionNameMap = {
+    "+": "add",
+    "-": "subtract",
+    "*": "multiply",
+    "/": "divide",
+    "%": "remainder",
+    "^": "power",
+    "!": "factorial",
+    "<": "comparison",
+    ">": "comparison",
+    "<=": "comparison",
+    ">=": "comparison",
+    "==": "comparison",
+    "!=": "comparison",
+    "||": "concatenate",
+    "and": "logical",
+    "or": "logical",
+    "not": "logical",
+    "?": "conditional",
+    ":": "conditional",
+    //'=': 'assignment', // Disable assignment
+    "[": "array"
+    //'()=': 'fndef' // Diable function definition
+}
+
+export class Parser {
+    constructor(options) {
+        this.options = options || {}
+        this.unaryOps = {
+            sin: Math.sin,
+            cos: Math.cos,
+            tan: Math.tan,
+            asin: Math.asin,
+            acos: Math.acos,
+            atan: Math.atan,
+            sinh: Math.sinh || Polyfill.sinh,
+            cosh: Math.cosh || Polyfill.cosh,
+            tanh: Math.tanh || Polyfill.tanh,
+            asinh: Math.asinh || Polyfill.asinh,
+            acosh: Math.acosh || Polyfill.acosh,
+            atanh: Math.atanh || Polyfill.atanh,
+            sqrt: Math.sqrt,
+            cbrt: Math.cbrt || Polyfill.cbrt,
+            log: Math.log,
+            log2: Math.log2 || Polyfill.log2,
+            ln: Math.log,
+            lg: Math.log10 || Polyfill.log10,
+            log10: Math.log10 || Polyfill.log10,
+            expm1: Math.expm1 || Polyfill.expm1,
+            log1p: Math.log1p || Polyfill.log1p,
+            abs: Math.abs,
+            ceil: Math.ceil,
+            floor: Math.floor,
+            round: Math.round,
+            trunc: Math.trunc || Polyfill.trunc,
+            "-": Polyfill.neg,
+            "+": Number,
+            exp: Math.exp,
+            not: Polyfill.not,
+            length: Polyfill.stringOrArrayLength,
+            "!": Polyfill.factorial,
+            sign: Math.sign || Polyfill.sign
+        }
+        this.unaryOpsList = Object.keys(this.unaryOps)
+
+        this.binaryOps = {
+            "+": Polyfill.add,
+            "-": Polyfill.sub,
+            "*": Polyfill.mul,
+            "/": Polyfill.div,
+            "%": Polyfill.mod,
+            "^": Math.pow,
+            "||": Polyfill.concat,
+            "==": Polyfill.equal,
+            "!=": Polyfill.notEqual,
+            ">": Polyfill.greaterThan,
+            "<": Polyfill.lessThan,
+            ">=": Polyfill.greaterThanEqual,
+            "<=": Polyfill.lessThanEqual,
+            and: Polyfill.andOperator,
+            or: Polyfill.orOperator,
+            "in": Polyfill.inOperator,
+            "=": Polyfill.setVar,
+            "[": Polyfill.arrayIndex
+        }
+
+        this.ternaryOps = {
+            "?": Polyfill.condition
+        }
+
+        this.functions = {
+            random: Polyfill.random,
+            fac: Polyfill.factorial,
+            min: Polyfill.min,
+            max: Polyfill.max,
+            hypot: Math.hypot || Polyfill.hypot,
+            pyt: Math.hypot || Polyfill.hypot, // backward compat
+            pow: Math.pow,
+            atan2: Math.atan2,
+            "if": Polyfill.condition,
+            gamma: Polyfill.gamma,
+            "Γ": Polyfill.gamma,
+            roundTo: Polyfill.roundTo,
+            map: Polyfill.arrayMap,
+            fold: Polyfill.arrayFold,
+            filter: Polyfill.arrayFilter,
+            indexOf: Polyfill.stringOrArrayIndexOf,
+            join: Polyfill.arrayJoin
+        }
+
+        // These constants will automatically be replaced the MOMENT they are parsed.
+        // (Original consts from the parser)
+        this.builtinConsts = {}
+        // These consts will only be replaced when the expression is evaluated.
+        this.consts = {}
+
+    }
+
+    parse(expr) {
+        const instr = []
+        const parserState = new ParserState(
+            this,
+            new TokenStream(this, expr),
+            { allowMemberAccess: this.options.allowMemberAccess }
+        )
+
+        parserState.parseExpression(instr)
+        parserState.expect(TEOF, QT_TRANSLATE_NOOP("error", "EOF"))
+
+        return new Expression(instr, this)
+    }
+
+    evaluate(expr, variables) {
+        return this.parse(expr).evaluate(variables)
+    }
+
+    isOperatorEnabled(op) {
+        const optionName = optionNameMap.hasOwnProperty(op) ? optionNameMap[op] : op
+        const operators = this.options.operators || {}
+
+        return !(optionName in operators) || !!operators[optionName]
+    }
+}

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/parserstate.mjs

@@ -0,0 +1,398 @@
+/**
+ * Based on ndef.parser, by Raphael Graf <r@undefined.ch>
+ * http://www.undefined.ch/mparser/index.html
+ *
+ * Ported to JavaScript and modified by Matthew Crumley <email@matthewcrumley.com>
+ * https://silentmatt.com/javascript-expression-evaluator/
+ *
+ * Ported to QMLJS with modifications done accordingly done by Ad5001 <mail@ad5001.eu> (https://ad5001.eu)
+ *
+ * Copyright (c) 2015 Matthew Crumley, 2021-2024 Ad5001
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
+ * to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
+ * but don't feel like you have to let me know or ask permission.
+ */
+
+import { TBRACKET, TCOMMA, TEOF, TNAME, TNUMBER, TOP, TPAREN, TSTRING } from "./tokens.mjs"
+import {
+    Instruction,
+    IARRAY, IEXPR, IFUNCALL, IMEMBER,
+    INUMBER, IVAR,
+    ternaryInstruction, binaryInstruction, unaryInstruction
+} from "./instruction.mjs"
+
+const COMPARISON_OPERATORS = ["==", "!=", "<", "<=", ">=", ">", "in"]
+const ADD_SUB_OPERATORS = ["+", "-", "||"]
+const TERM_OPERATORS = ["*", "/", "%"]
+
+export class ParserState {
+    /**
+     *
+     * @param {Parser} parser
+     * @param {TokenStream} tokenStream
+     * @param {{[operators]: Object.<string, boolean>, [allowMemberAccess]: boolean}} options
+     */
+    constructor(parser, tokenStream, options) {
+        this.parser = parser
+        this.tokens = tokenStream
+        this.current = null
+        this.nextToken = null
+        this.next()
+        this.savedCurrent = null
+        this.savedNextToken = null
+        this.allowMemberAccess = options.allowMemberAccess !== false
+    }
+
+    /**
+     * Queries the next token for parsing.
+     * @return {Token}
+     */
+    next() {
+        this.current = this.nextToken
+        this.nextToken = this.tokens.next()
+        return this.nextToken
+    }
+
+    /**
+     * Checks if a given Token matches a condition (called if function, one of if array, and exact match otherwise)
+     * @param {Token} token
+     * @param {Array|function(Token): boolean|string|number|boolean} [value]
+     * @return {boolean}
+     */
+    tokenMatches(token, value) {
+        if(typeof value === "undefined") {
+            return true
+        } else if(Array.isArray(value)) {
+            return value.includes(token.value)
+        } else if(typeof value === "function") {
+            return value(token)
+        } else {
+            return token.value === value
+        }
+    }
+
+    /**
+     * Saves the current state (current and next token) to be restored later.
+     */
+    save() {
+        this.savedCurrent = this.current
+        this.savedNextToken = this.nextToken
+        this.tokens.save()
+    }
+
+    /**
+     * Restores a previous state (current and next token) from last save.
+     */
+    restore() {
+        this.tokens.restore()
+        this.current = this.savedCurrent
+        this.nextToken = this.savedNextToken
+    }
+
+    /**
+     * Checks if the next token matches the given type and value, and if so, consume the current token.
+     * Returns true if the check matches.
+     * @param {string} type
+     * @param {any} [value]
+     * @return {boolean}
+     */
+    accept(type, value) {
+        if(this.nextToken.type === type && this.tokenMatches(this.nextToken, value)) {
+            this.next()
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Throws an error if the next token does not match the given type and value. Otherwise, consumes the current token.
+     * @param {string} type
+     * @param {any} [value]
+     */
+    expect(type, value) {
+        if(!this.accept(type, value)) {
+            throw new Error(qsTranslate("error", "Parse error [position %1]: %2")
+                .arg(this.tokens.pos)
+                .arg(qsTranslate("error", "Expected %1").arg(value || type)))
+        }
+    }
+
+    /**
+     * Converts enough Tokens to form an expression atom (generally the next part of the expression) into an instruction
+     * and pushes it to the instruction list.
+     * Throws an error if an unexpected token gets parsed.
+     * @param {Instruction[]} instr
+     */
+    parseAtom(instr) {
+        const prefixOperators = this.tokens.unaryOpsList
+
+        if(this.accept(TNAME) || this.accept(TOP, prefixOperators)) {
+            instr.push(new Instruction(IVAR, this.current.value))
+        } else if(this.accept(TNUMBER)) {
+            instr.push(new Instruction(INUMBER, this.current.value))
+        } else if(this.accept(TSTRING)) {
+            instr.push(new Instruction(INUMBER, this.current.value))
+        } else if(this.accept(TPAREN, "(")) {
+            this.parseExpression(instr)
+            this.expect(TPAREN, ")")
+        } else if(this.accept(TBRACKET, "[")) {
+            if(this.accept(TBRACKET, "]")) {
+                instr.push(new Instruction(IARRAY, 0))
+            } else {
+                const argCount = this.parseArrayList(instr)
+                instr.push(new Instruction(IARRAY, argCount))
+            }
+        } else {
+            throw new Error(qsTranslate("error", "Unexpected %1").arg(this.nextToken))
+        }
+    }
+
+    /**
+     * Consumes the next tokens to compile a general expression which should return a value, and compiles
+     * the instructions into the list.
+     * @param {Instruction[]} instr
+     */
+    parseExpression(instr) {
+        const exprInstr = []
+        this.parseConditionalExpression(exprInstr)
+        instr.push(...exprInstr)
+    }
+
+    /**
+     * Parses an array indice, and return the number of arguments found at the end.
+     * @param {Instruction[]} instr
+     * @return {number}
+     */
+    parseArrayList(instr) {
+        let argCount = 0
+
+        while(!this.accept(TBRACKET, "]")) {
+            this.parseExpression(instr)
+            ++argCount
+            while(this.accept(TCOMMA)) {
+                this.parseExpression(instr)
+                ++argCount
+            }
+        }
+
+        return argCount
+    }
+
+    /**
+     * Parses a tertiary statement (<condition> ? <value if true> : <value if false>) and pushes it into the instruction
+     * list.
+     * @param {Instruction[]} instr
+     */
+    parseConditionalExpression(instr) {
+        this.parseOrExpression(instr)
+        while(this.accept(TOP, "?")) {
+            const trueBranch = []
+            const falseBranch = []
+            this.parseConditionalExpression(trueBranch)
+            this.expect(TOP, ":")
+            this.parseConditionalExpression(falseBranch)
+            instr.push(new Instruction(IEXPR, trueBranch))
+            instr.push(new Instruction(IEXPR, falseBranch))
+            instr.push(ternaryInstruction("?"))
+        }
+    }
+
+    /**
+     * Parses a binary or statement (<condition 1> or <condition 2>) and pushes it into the instruction list.
+     * @param {Instruction[]} instr
+     */
+    parseOrExpression(instr) {
+        this.parseAndExpression(instr)
+        while(this.accept(TOP, "or")) {
+            const falseBranch = []
+            this.parseAndExpression(falseBranch)
+            instr.push(new Instruction(IEXPR, falseBranch))
+            instr.push(binaryInstruction("or"))
+        }
+    }
+
+    /**
+     * Parses a binary and statement (<condition 1> and <condition 2>) and pushes it into the instruction list.
+     * @param {Instruction[]} instr
+     */
+    parseAndExpression(instr) {
+        this.parseComparison(instr)
+        while(this.accept(TOP, "and")) {
+            const trueBranch = []
+            this.parseComparison(trueBranch)
+            instr.push(new Instruction(IEXPR, trueBranch))
+            instr.push(binaryInstruction("and"))
+        }
+    }
+
+    /**
+     * Parses a binary equality statement (<condition 1> == <condition 2> and so on) and pushes it into the instruction list.
+     * @param {Instruction[]} instr
+     */
+    parseComparison(instr) {
+        this.parseAddSub(instr)
+        while(this.accept(TOP, COMPARISON_OPERATORS)) {
+            const op = this.current
+            this.parseAddSub(instr)
+            instr.push(binaryInstruction(op.value))
+        }
+    }
+
+    /**
+     * Parses add, minus and concat operations and pushes them into the instruction list.
+     * @param {Instruction[]} instr
+     */
+    parseAddSub(instr) {
+        this.parseTerm(instr)
+        while(this.accept(TOP, ADD_SUB_OPERATORS)) {
+            const op = this.current
+            this.parseTerm(instr)
+            instr.push(binaryInstruction(op.value))
+        }
+    }
+
+    /**
+     * Parses times, divide and modulo operations and pushes them into the instruction list.
+     * @param {Instruction[]} instr
+     */
+    parseTerm(instr) {
+        this.parseFactor(instr)
+        while(this.accept(TOP, TERM_OPERATORS)) {
+            const op = this.current
+            this.parseFactor(instr)
+            instr.push(binaryInstruction(op.value))
+        }
+    }
+
+    /**
+     * Parses prefix operations (+, -, but also functions like sin or cos which don't need parentheses)
+     * @param {Instruction[]} instr
+     */
+    parseFactor(instr) {
+        const prefixOperators = this.tokens.unaryOpsList
+
+        this.save()
+        if(this.accept(TOP, prefixOperators)) {
+            if(this.current.value !== "-" && this.current.value !== "+") {
+                if(this.nextToken.type === TPAREN && this.nextToken.value === "(") {
+                    this.restore()
+                    this.parseExponential(instr)
+                    return
+                } else if(this.nextToken.type === TCOMMA || this.nextToken.type === TEOF || (this.nextToken.type === TPAREN && this.nextToken.value === ")")) {
+                    this.restore()
+                    this.parseAtom(instr)
+                    return
+                }
+            }
+
+            const op = this.current
+            this.parseFactor(instr)
+            instr.push(unaryInstruction(op.value))
+        } else {
+            this.parseExponential(instr)
+        }
+    }
+
+    /**
+     *
+     * @param {Instruction[]} instr
+     */
+    parseExponential(instr) {
+        this.parsePostfixExpression(instr)
+        while(this.accept(TOP, "^")) {
+            this.parseFactor(instr)
+            instr.push(binaryInstruction("^"))
+        }
+    }
+
+
+    /**
+     * Parses factorial '!' (after the expression to apply it to).
+     * @param {Instruction[]} instr
+     */
+    parsePostfixExpression(instr) {
+        this.parseFunctionCall(instr)
+        while(this.accept(TOP, "!")) {
+            instr.push(unaryInstruction("!"))
+        }
+    }
+
+    /**
+     * Parse a function (name + parentheses + arguments).
+     * @param {Instruction[]} instr
+     */
+    parseFunctionCall(instr) {
+        const prefixOperators = this.tokens.unaryOpsList
+
+        if(this.accept(TOP, prefixOperators)) {
+            const op = this.current
+            this.parseAtom(instr)
+            instr.push(unaryInstruction(op.value))
+        } else {
+            this.parseMemberExpression(instr)
+            while(this.accept(TPAREN, "(")) {
+                if(this.accept(TPAREN, ")")) {
+                    instr.push(new Instruction(IFUNCALL, 0))
+                } else {
+                    const argCount = this.parseArgumentList(instr)
+                    instr.push(new Instruction(IFUNCALL, argCount))
+                }
+            }
+        }
+    }
+
+    /**
+     * Parses a list of arguments, return their quantity.
+     * @param {Instruction[]} instr
+     * @return {number}
+     */
+    parseArgumentList(instr) {
+        let argCount = 0
+
+        while(!this.accept(TPAREN, ")")) {
+            this.parseExpression(instr)
+            ++argCount
+            while(this.accept(TCOMMA)) {
+                this.parseExpression(instr)
+                ++argCount
+            }
+        }
+
+        return argCount
+    }
+
+    parseMemberExpression(instr) {
+        this.parseAtom(instr)
+        while(this.accept(TOP, ".") || this.accept(TBRACKET, "[")) {
+            const op = this.current
+
+            if(op.value === ".") {
+                if(!this.allowMemberAccess) {
+                    throw new Error(qsTranslate("error", "Unexpected \".\": member access is not permitted"))
+                }
+
+                this.expect(TNAME)
+                instr.push(new Instruction(IMEMBER, this.current.value))
+            } else if(op.value === "[") {
+                if(!this.tokens.isOperatorEnabled("[")) {
+                    throw new Error(qsTranslate("error", "Unexpected \"[]\": arrays are disabled."))
+                }
+
+                this.parseExpression(instr)
+                this.expect(TBRACKET, "]")
+                instr.push(binaryInstruction("["))
+            } else {
+                throw new Error(qsTranslate("error", "Unexpected symbol: %1.").arg(op.value))
+            }
+        }
+    }
+}

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/polyfill.mjs

@@ -0,0 +1,371 @@
+/**
+ * Based on ndef.parser, by Raphael Graf <r@undefined.ch>
+ * http://www.undefined.ch/mparser/index.html
+ *
+ * Ported to JavaScript and modified by Matthew Crumley <email@matthewcrumley.com>
+ * https://silentmatt.com/javascript-expression-evaluator/
+ *
+ * Ported to QMLJS with modifications done accordingly done by Ad5001 <mail@ad5001.eu> (https://ad5001.eu)
+ *
+ * Copyright (c) 2015 Matthew Crumley, 2021-2024 Ad5001
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
+ * to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
+ * but don't feel like you have to let me know or ask permission.
+ */
+
+export function add(a, b) {
+    return Number(a) + Number(b)
+}
+
+export function sub(a, b) {
+    return a - b
+}
+
+export function mul(a, b) {
+    return a * b
+}
+
+export function div(a, b) {
+    return a / b
+}
+
+export function mod(a, b) {
+    return a % b
+}
+
+export function concat(a, b) {
+    if(Array.isArray(a) && Array.isArray(b)) {
+        return a.concat(b)
+    }
+    return "" + a + b
+}
+
+export function equal(a, b) {
+    return a === b
+}
+
+export function notEqual(a, b) {
+    return a !== b
+}
+
+export function greaterThan(a, b) {
+    return a > b
+}
+
+export function lessThan(a, b) {
+    return a < b
+}
+
+export function greaterThanEqual(a, b) {
+    return a >= b
+}
+
+export function lessThanEqual(a, b) {
+    return a <= b
+}
+
+export function andOperator(a, b) {
+    return Boolean(a && b)
+}
+
+export function orOperator(a, b) {
+    return Boolean(a || b)
+}
+
+export function inOperator(a, b) {
+    return b.includes(a)
+}
+
+export function sinh(a) {
+    return ((Math.exp(a) - Math.exp(-a)) / 2)
+}
+
+export function cosh(a) {
+    return ((Math.exp(a) + Math.exp(-a)) / 2)
+}
+
+export function tanh(a) {
+    if(a === Infinity) return 1
+    if(a === -Infinity) return -1
+    return (Math.exp(a) - Math.exp(-a)) / (Math.exp(a) + Math.exp(-a))
+}
+
+export function asinh(a) {
+    if(a === -Infinity) return a
+    return Math.log(a + Math.sqrt((a * a) + 1))
+}
+
+export function acosh(a) {
+    return Math.log(a + Math.sqrt((a * a) - 1))
+}
+
+export function atanh(a) {
+    return (Math.log((1 + a) / (1 - a)) / 2)
+}
+
+export function log10(a) {
+    return Math.log(a) * Math.LOG10E
+}
+
+export function neg(a) {
+    return -a
+}
+
+export function not(a) {
+    return !a
+}
+
+export function trunc(a) {
+    return a < 0 ? Math.ceil(a) : Math.floor(a)
+}
+
+export function random(a) {
+    return Math.random() * (a || 1)
+}
+
+export function factorial(a) { // a!
+    return gamma(a + 1)
+}
+
+export function isInteger(value) {
+    return isFinite(value) && (value === Math.round(value))
+}
+
+const GAMMA_G = 4.7421875
+const GAMMA_P = [
+    0.99999999999999709182,
+    57.156235665862923517, -59.597960355475491248,
+    14.136097974741747174, -0.49191381609762019978,
+    0.33994649984811888699e-4,
+    0.46523628927048575665e-4, -0.98374475304879564677e-4,
+    0.15808870322491248884e-3, -0.21026444172410488319e-3,
+    0.21743961811521264320e-3, -0.16431810653676389022e-3,
+    0.84418223983852743293e-4, -0.26190838401581408670e-4,
+    0.36899182659531622704e-5
+]
+
+// Gamma function from math.js
+export function gamma(n) {
+    let t, x
+
+    if(isInteger(n)) {
+        if(n <= 0) {
+            return isFinite(n) ? Infinity : NaN
+        }
+
+        if(n > 171) {
+            return Infinity // Will overflow
+        }
+
+        let value = n - 2
+        let res = n - 1
+        while(value > 1) {
+            res *= value
+            value--
+        }
+
+        if(res === 0) {
+            res = 1 // 0! is per definition 1
+        }
+
+        return res
+    }
+
+    if(n < 0.5) {
+        return Math.PI / (Math.sin(Math.PI * n) * gamma(1 - n))
+    }
+
+    if(n >= 171.35) {
+        return Infinity // will overflow
+    }
+
+    if(n > 85.0) { // Extended Stirling Approx
+        const twoN = n * n
+        const threeN = twoN * n
+        const fourN = threeN * n
+        const fiveN = fourN * n
+        return Math.sqrt(2 * Math.PI / n) * Math.pow((n / Math.E), n) *
+            (1 + (1 / (12 * n)) + (1 / (288 * twoN)) - (139 / (51840 * threeN)) -
+                (571 / (2488320 * fourN)) + (163879 / (209018880 * fiveN)) +
+                (5246819 / (75246796800 * fiveN * n)))
+    }
+
+    --n
+    x = GAMMA_P[0]
+    for(let i = 1; i < GAMMA_P.length; ++i) {
+        x += GAMMA_P[i] / (n + i)
+    }
+
+    t = n + GAMMA_G + 0.5
+    return Math.sqrt(2 * Math.PI) * Math.pow(t, n + 0.5) * Math.exp(-t) * x
+}
+
+export function stringOrArrayLength(s) {
+    if(Array.isArray(s)) {
+        return s.length
+    }
+    return String(s).length
+}
+
+export function hypot() {
+    let sum = 0
+    let larg = 0
+    for(let i = 0; i < arguments.length; i++) {
+        const arg = Math.abs(arguments[i])
+        let div
+        if(larg < arg) {
+            div = larg / arg
+            sum = (sum * div * div) + 1
+            larg = arg
+        } else if(arg > 0) {
+            div = arg / larg
+            sum += div * div
+        } else {
+            sum += arg
+        }
+    }
+    return larg === Infinity ? Infinity : larg * Math.sqrt(sum)
+}
+
+export function condition(cond, yep, nope) {
+    return cond ? yep : nope
+}
+
+/**
+ * Decimal adjustment of a number.
+ * From @escopecz.
+ *
+ * @param {number} value - The number.
+ * @param {Integer} exp - The exponent (the 10 logarithm of the adjustment base).
+ * @return {number} - The adjusted value.
+ */
+export function roundTo(value, exp) {
+    // If the exp is undefined or zero...
+    if(typeof exp === "undefined" || +exp === 0) {
+        return Math.round(value)
+    }
+    value = +value
+    exp = -(+exp)
+    // If the value is not a number or the exp is not an integer...
+    if(isNaN(value) || !(typeof exp === "number" && exp % 1 === 0)) {
+        return NaN
+    }
+    // Shift
+    value = value.toString().split("e")
+    value = Math.round(+(value[0] + "e" + (value[1] ? (+value[1] - exp) : -exp)))
+    // Shift back
+    value = value.toString().split("e")
+    return +(value[0] + "e" + (value[1] ? (+value[1] + exp) : exp))
+}
+
+export function setVar(name, value, variables) {
+    if(variables) variables[name] = value
+    return value
+}
+
+export function arrayIndex(array, index) {
+    return array[index | 0]
+}
+
+export function max(array) {
+    if(arguments.length === 1 && Array.isArray(array)) {
+        return Math.max.apply(Math, array)
+    } else if(arguments.length >= 1) {
+        return Math.max.apply(Math, arguments)
+    } else {
+        throw new EvalError(qsTranslate("error", "Function %1 must have at least one argument.").arg("max"))
+    }
+}
+
+export function min(array) {
+    if(arguments.length === 1 && Array.isArray(array)) {
+        return Math.min.apply(Math, array)
+    } else if(arguments.length >= 1) {
+        return Math.min.apply(Math, arguments)
+    } else {
+        throw new EvalError(qsTranslate("error", "Function %1 must have at least one argument.").arg("min"))
+    }
+}
+
+export function arrayMap(f, a) {
+    if(typeof f !== "function") {
+        throw new EvalError(qsTranslate("error", "First argument to map is not a function."))
+    }
+    if(!Array.isArray(a)) {
+        throw new EvalError(qsTranslate("error", "Second argument to map is not an array."))
+    }
+    return a.map(function(x, i) {
+        return f(x, i)
+    })
+}
+
+export function arrayFold(f, init, a) {
+    if(typeof f !== "function") {
+        throw new EvalError(qsTranslate("error", "First argument to fold is not a function."))
+    }
+    if(!Array.isArray(a)) {
+        throw new EvalError(qsTranslate("error", "Second argument to fold is not an array."))
+    }
+    return a.reduce(function(acc, x, i) {
+        return f(acc, x, i)
+    }, init)
+}
+
+export function arrayFilter(f, a) {
+    if(typeof f !== "function") {
+        throw new EvalError(qsTranslate("error", "First argument to filter is not a function."))
+    }
+    if(!Array.isArray(a)) {
+        throw new EvalError(qsTranslate("error", "Second argument to filter is not an array."))
+    }
+    return a.filter(function(x, i) {
+        return f(x, i)
+    })
+}
+
+export function stringOrArrayIndexOf(target, s) {
+    if(!(Array.isArray(s) || typeof s === "string")) {
+        throw new Error(qsTranslate("error", "Second argument to indexOf is not a string or array."))
+    }
+
+    return s.indexOf(target)
+}
+
+export function arrayJoin(sep, a) {
+    if(!Array.isArray(a)) {
+        throw new Error(qsTranslate("error", "Second argument to join is not an array."))
+    }
+
+    return a.join(sep)
+}
+
+export function sign(x) {
+    return ((x > 0) - (x < 0)) || +x
+}
+
+const ONE_THIRD = 1 / 3
+
+export function cbrt(x) {
+    return x < 0 ? -Math.pow(-x, ONE_THIRD) : Math.pow(x, ONE_THIRD)
+}
+
+export function expm1(x) {
+    return Math.exp(x) - 1
+}
+
+export function log1p(x) {
+    return Math.log(1 + x)
+}
+
+export function log2(x) {
+    return Math.log(x) / Math.LN2
+}

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/lib/expr-eval/tokens.mjs

@@ -0,0 +1,575 @@
+/**
+ * Based on ndef.parser, by Raphael Graf <r@undefined.ch>
+ * http://www.undefined.ch/mparser/index.html
+ *
+ * Ported to JavaScript and modified by Matthew Crumley <email@matthewcrumley.com>
+ * https://silentmatt.com/javascript-expression-evaluator/
+ *
+ * Ported to QMLJS with modifications done accordingly done by Ad5001 <mail@ad5001.eu> (https://ad5001.eu)
+ *
+ * Copyright (c) 2015 Matthew Crumley, 2021-2024 Ad5001
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ * You are free to use and modify this code in anyway you find useful. Please leave this comment in the code
+ * to acknowledge its original source. If you feel like it, I enjoy hearing about projects that use my code,
+ * but don't feel like you have to let me know or ask permission.
+ */
+
+export const TEOF = "TEOF"
+export const TOP = "TOP"
+export const TNUMBER = "TNUMBER"
+export const TSTRING = "TSTRING"
+export const TPAREN = "TPAREN"
+export const TBRACKET = "TBRACKET"
+export const TCOMMA = "TCOMMA"
+export const TNAME = "TNAME"
+
+
+// Additional variable characters.
+export const ADDITIONAL_VARCHARS = [
+    "α", "β", "γ", "δ", "ε", "ζ", "η",
+    "π", "θ", "κ", "λ", "μ", "ξ", "ρ",
+    "ς", "σ", "τ", "φ", "χ", "ψ", "ω",
+    "Γ", "Δ", "Θ", "Λ", "Ξ", "Π", "Σ",
+    "Φ", "Ψ", "Ω", "ₐ", "ₑ", "ₒ", "ₓ",
+    "ₕ", "ₖ", "ₗ", "ₘ", "ₙ", "ₚ", "ₛ",
+    "ₜ", "¹", "²", "³", "⁴", "⁵", "⁶",
+    "⁷", "⁸", "⁹", "⁰", "₁", "₂", "₃",
+    "₄", "₅", "₆", "₇", "₈", "₉", "₀",
+    "∞", "π"
+]
+
+export class Token {
+    /**
+     *
+     * @param {string} type - Type of the token (see above).
+     * @param {any} value - Value of the token.
+     * @param {number} index - Index in the string of the token.
+     */
+    constructor(type, value, index) {
+        this.type = type
+        this.value = value
+        this.index = index
+    }
+
+    toString() {
+        return this.type + ": " + this.value
+    }
+}
+
+const unicodeCodePointPattern = /^[0-9a-f]{4}$/i
+
+export class TokenStream {
+    /**
+     *
+     * @param {Parser} parser
+     * @param {string} expression
+     */
+    constructor(parser, expression) {
+        this.pos = 0
+        this.current = null
+        this.unaryOps = parser.unaryOps
+        this.unaryOpsList = parser.unaryOpsList
+        this.binaryOps = parser.binaryOps
+        this.ternaryOps = parser.ternaryOps
+        this.builtinConsts = parser.builtinConsts
+        this.expression = expression
+        this.savedPosition = 0
+        this.savedCurrent = null
+        this.options = parser.options
+        this.parser = parser
+    }
+
+    /**
+     *
+     * @param {string} type - Type of the token (see above).
+     * @param {any} value - Value of the token.
+     * @param {number} [pos] - Index in the string of the token.
+     */
+    newToken(type, value, pos) {
+        return new Token(type, value, pos != null ? pos : this.pos)
+    }
+
+    /**
+     * Saves the current position and token into the object.
+     */
+    save() {
+        this.savedPosition = this.pos
+        this.savedCurrent = this.current
+    }
+
+
+    /**
+     * Restored the saved position and token into the current.
+     */
+    restore() {
+        this.pos = this.savedPosition
+        this.current = this.savedCurrent
+    }
+
+    /**
+     * Consumes the character at the current position and advance it
+     * until it makes a valid token, and returns it.
+     * @returns {Token}
+     */
+    next() {
+        if(this.pos >= this.expression.length) {
+            return this.newToken(TEOF, "EOF")
+        }
+
+        if(this.isWhitespace()) {
+            return this.next()
+        } else if(this.isRadixInteger() ||
+            this.isNumber() ||
+            this.isOperator() ||
+            this.isString() ||
+            this.isParen() ||
+            this.isBracket() ||
+            this.isComma() ||
+            this.isNamedOp() ||
+            this.isConst() ||
+            this.isName()) {
+            return this.current
+        } else {
+            this.parseError(qsTranslate("error", "Unknown character \"%1\".").arg(this.expression.charAt(this.pos)))
+        }
+    }
+
+    /**
+     * Checks if the character at the current position starts a string, and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isString() {
+        const startPos = this.pos
+        const quote = this.expression.charAt(startPos)
+        let r = false
+
+        if(quote === "'" || quote === "\"") {
+            let index = this.expression.indexOf(quote, startPos + 1)
+            while(index >= 0 && this.pos < this.expression.length) {
+                this.pos = index + 1
+                if(this.expression.charAt(index - 1) !== "\\") {
+                    const rawString = this.expression.substring(startPos + 1, index)
+                    this.current = this.newToken(TSTRING, this.unescape(rawString), startPos)
+                    r = true
+                    break
+                }
+                index = this.expression.indexOf(quote, index + 1)
+            }
+        }
+        return r
+    }
+
+    /**
+     * Checks if the character at the current pos is a parenthesis, and if so consumes it into current
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isParen() {
+        const c = this.expression.charAt(this.pos)
+        if(c === "(" || c === ")") {
+            this.current = this.newToken(TPAREN, c)
+            this.pos++
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Checks if the character at the current pos is a bracket, and if so consumes it into current
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isBracket() {
+        const c = this.expression.charAt(this.pos)
+        if((c === "[" || c === "]") && this.isOperatorEnabled("[")) {
+            this.current = this.newToken(TBRACKET, c)
+            this.pos++
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Checks if the character at the current pos is a comma, and if so consumes it into current
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isComma() {
+        const c = this.expression.charAt(this.pos)
+        if(c === ",") {
+            this.current = this.newToken(TCOMMA, ",")
+            this.pos++
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Checks if the current character is an identifier and makes a const, and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isConst() {
+        const startPos = this.pos
+        let i = startPos
+        for(; i < this.expression.length; i++) {
+            const c = this.expression.charAt(i)
+            if(c.toUpperCase() === c.toLowerCase() && !ADDITIONAL_VARCHARS.includes(c)) {
+                if(i === this.pos || (c !== "_" && c !== "." && (c < "0" || c > "9"))) {
+                    break
+                }
+            }
+        }
+        if(i > startPos) {
+            const str = this.expression.substring(startPos, i)
+            if(str in this.builtinConsts) {
+                this.current = this.newToken(TNUMBER, this.builtinConsts[str])
+                this.pos += str.length
+                return true
+            }
+        }
+        return false
+    }
+
+    /**
+     * Checks if the current character is an identifier and makes a function or an operator, and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isNamedOp() {
+        const startPos = this.pos
+        let i = startPos
+        for(; i < this.expression.length; i++) {
+            const c = this.expression.charAt(i)
+            if(c.toUpperCase() === c.toLowerCase()) {
+                if(i === this.pos || (c !== "_" && (c < "0" || c > "9"))) {
+                    break
+                }
+            }
+        }
+        if(i > startPos) {
+            const str = this.expression.substring(startPos, i)
+            if(this.isOperatorEnabled(str) && (str in this.binaryOps || str in this.unaryOps || str in this.ternaryOps)) {
+                this.current = this.newToken(TOP, str)
+                this.pos += str.length
+                return true
+            }
+        }
+        return false
+    }
+
+    /**
+     * Checks if the current character is an identifier and makes a variable, and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isName() {
+        const startPos = this.pos
+        let i = startPos
+        let hasLetter = false
+        for(; i < this.expression.length; i++) {
+            const c = this.expression.charAt(i)
+            if(c.toUpperCase() === c.toLowerCase() && !ADDITIONAL_VARCHARS.includes(c)) {
+                if(i === this.pos && (c === "$" || c === "_")) {
+                    if(c === "_") {
+                        hasLetter = true
+                    }
+                } else if(i === this.pos || !hasLetter || (c !== "_" && (c < "0" || c > "9"))) {
+                    break
+                }
+            } else {
+                hasLetter = true
+            }
+        }
+        if(hasLetter) {
+            const str = this.expression.substring(startPos, i)
+            this.current = this.newToken(TNAME, str)
+            this.pos += str.length
+            return true
+        }
+        return false
+    }
+
+    /**
+     * Checks if the character at the current position is a whitespace, and if so, consumes all consecutive whitespaces
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     *
+     */
+    isWhitespace() {
+        let r = false
+        let c = this.expression.charAt(this.pos)
+        while(c === " " || c === "\t" || c === "\n" || c === "\r") {
+            r = true
+            this.pos++
+            if(this.pos >= this.expression.length) {
+                break
+            }
+            c = this.expression.charAt(this.pos)
+        }
+        return r
+    }
+
+    /**
+     * Checks if the current character is a zero, and checks whether it forms a radix number, and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isRadixInteger() {
+        let pos = this.pos
+
+        if(pos >= this.expression.length - 2 || this.expression.charAt(pos) !== "0") {
+            return false
+        }
+        ++pos
+
+        let radix
+        let validDigit
+        if(this.expression.charAt(pos) === "x") {
+            radix = 16
+            validDigit = /^[0-9a-f]$/i
+            pos++
+        } else if(this.expression.charAt(pos) === "b") {
+            radix = 2
+            validDigit = /^[01]$/i
+            pos++
+        } else {
+            return false
+        }
+
+        let valid = false
+        const startPos = pos
+
+        while(pos < this.expression.length) {
+            const c = this.expression.charAt(pos)
+            if(validDigit.test(c)) {
+                pos++
+                valid = true
+            } else {
+                break
+            }
+        }
+
+        if(valid) {
+            this.current = this.newToken(TNUMBER, parseInt(this.expression.substring(startPos, pos), radix))
+            this.pos = pos
+        }
+        return valid
+    }
+
+    /**
+     * Checks if the current character is a digit, and checks whether it forms a number, and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @returns {boolean}
+     */
+    isNumber() {
+        const startPos = this.pos
+        let valid = false
+        let pos = startPos
+        let resetPos = startPos
+        let foundDot = false
+        let foundDigits = false
+        let c
+
+        // Check for digit with dot.
+        while(pos < this.expression.length) {
+            c = this.expression.charAt(pos)
+            if((c >= "0" && c <= "9") || (!foundDot && c === ".")) {
+                if(c === ".") {
+                    foundDot = true
+                } else {
+                    foundDigits = true
+                }
+                pos++
+                valid = foundDigits
+            } else {
+                break
+            }
+        }
+
+        if(valid) {
+            resetPos = pos
+        }
+
+        // Check for e exponents.
+        if(c === "e" || c === "E") {
+            pos++
+            let acceptSign = true
+            let validExponent = false
+            while(pos < this.expression.length) {
+                c = this.expression.charAt(pos)
+                if(acceptSign && (c === "+" || c === "-")) {
+                    acceptSign = false
+                } else if(c >= "0" && c <= "9") {
+                    validExponent = true
+                    acceptSign = false
+                } else {
+                    break
+                }
+                pos++
+            }
+
+            if(!validExponent) {
+                pos = resetPos
+            }
+        }
+
+        // Use parseFloat now that we've identified the number.
+        if(valid) {
+            this.current = this.newToken(TNUMBER, parseFloat(this.expression.substring(startPos, pos)))
+            this.pos = pos
+        } else {
+            this.pos = resetPos
+        }
+        return valid
+    }
+
+    /**
+     * Checks if the current character is an operator, checks whether it's enabled and if so, consumes it as the current token
+     * and returns true. Otherwise, returns false.
+     * @return {boolean}
+     */
+    isOperator() {
+        const startPos = this.pos
+        const c = this.expression.charAt(this.pos)
+
+        if(c === "+" || c === "-" || c === "*" || c === "/" || c === "%" || c === "^" || c === "?" || c === ":" || c === ".") {
+            this.current = this.newToken(TOP, c)
+        } else if(c === "∙" || c === "•") {
+            this.current = this.newToken(TOP, "*")
+        } else if(c === ">") {
+            if(this.expression.charAt(this.pos + 1) === "=") {
+                this.current = this.newToken(TOP, ">=")
+                this.pos++
+            } else {
+                this.current = this.newToken(TOP, ">")
+            }
+        } else if(c === "<") {
+            if(this.expression.charAt(this.pos + 1) === "=") {
+                this.current = this.newToken(TOP, "<=")
+                this.pos++
+            } else {
+                this.current = this.newToken(TOP, "<")
+            }
+        } else if(c === "|") {
+            if(this.expression.charAt(this.pos + 1) === "|") {
+                this.current = this.newToken(TOP, "||")
+                this.pos++
+            } else {
+                return false
+            }
+        } else if(c === "=") {
+            if(this.expression.charAt(this.pos + 1) === "=") {
+                this.current = this.newToken(TOP, "==")
+                this.pos++
+            } else {
+                this.current = this.newToken(TOP, c)
+            }
+        } else if(c === "!") {
+            if(this.expression.charAt(this.pos + 1) === "=") {
+                this.current = this.newToken(TOP, "!=")
+                this.pos++
+            } else {
+                this.current = this.newToken(TOP, c)
+            }
+        } else {
+            return false
+        }
+        this.pos++
+
+        if(this.isOperatorEnabled(this.current.value)) {
+            return true
+        } else {
+            this.pos = startPos
+            return false
+        }
+    }
+
+    /**
+     * Replaces a backslash and a character by its unescaped value.
+     * @param {string} v - string to un escape.
+     */
+    unescape(v) {
+        let index = v.indexOf("\\")
+        if(index < 0) {
+            return v
+        }
+
+        let buffer = v.substring(0, index)
+        while(index >= 0) {
+            const c = v.charAt(++index)
+            switch(c) {
+                case "'":
+                    buffer += "'"
+                    break
+                case "\"":
+                    buffer += "\""
+                    break
+                case "\\":
+                    buffer += "\\"
+                    break
+                case "/":
+                    buffer += "/"
+                    break
+                case "b":
+                    buffer += "\b"
+                    break
+                case "f":
+                    buffer += "\f"
+                    break
+                case "n":
+                    buffer += "\n"
+                    break
+                case "r":
+                    buffer += "\r"
+                    break
+                case "t":
+                    buffer += "\t"
+                    break
+                case "u":
+                    // interpret the following 4 characters as the hex of the unicode code point
+                    const codePoint = v.substring(index + 1, index + 5)
+                    if(!unicodeCodePointPattern.test(codePoint)) {
+                        this.parseError(qsTranslate("error", "Illegal escape sequence: %1.").arg("\\u" + codePoint))
+                    }
+                    buffer += String.fromCharCode(parseInt(codePoint, 16))
+                    index += 4
+                    break
+                default:
+                    throw this.parseError(qsTranslate("error", "Illegal escape sequence: %1.").arg("\\" + c))
+            }
+            ++index
+            const backslash = v.indexOf("\\", index)
+            buffer += v.substring(index, backslash < 0 ? v.length : backslash)
+            index = backslash
+        }
+
+        return buffer
+    }
+
+    /**
+     * Shorthand for the parser's method to check if an operator is enabled.
+     * @param {string} op
+     * @return {boolean}
+     */
+    isOperatorEnabled(op) {
+        return this.parser.isOperatorEnabled(op)
+    }
+
+    /**
+     * Throws a translated error.
+     * @param {string} msg
+     */
+    parseError(msg) {
+        throw new Error(qsTranslate("error", "Parse error [position %1]: %2").arg(this.pos).arg(msg))
+    }
+}

LogarithmPlotter/qml/eu/ad5001/LogarithmPlotter/js/math/latex.mjs

@@ -1,50 +1,52 @@
 /**
  *  LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
  *  Copyright (C) 2021-2024  Ad5001
- * 
+ *
  *  This program is free software: you can redistribute it and/or modify
  *  it under the terms of the GNU General Public License as published by
  *  the Free Software Foundation, either version 3 of the License, or
  *  (at your option) any later version.
- * 
+ *
  *  This program is distributed in the hope that it will be useful,
  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *  GNU General Public License for more details.
- * 
+ *
  *  You should have received a copy of the GNU General Public License
  *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-import { Module } from '../modules.mjs'
+import { Module } from "../modules.mjs"
+import * as Instruction from "../lib/expr-eval/instruction.mjs"
+import { escapeValue } from "../lib/expr-eval/expression.mjs"
 
-const unicodechars = ["α","β","γ","δ","ε","ζ","η",
+const unicodechars = ["α", "β", "γ", "δ", "ε", "ζ", "η",
-    "π","θ","κ","λ","μ","ξ","ρ",
+    "π", "θ", "κ", "λ", "μ", "ξ", "ρ",
-    "ς","σ","τ","φ","χ","ψ","ω",
+    "ς", "σ", "τ", "φ", "χ", "ψ", "ω",
-    "Γ","Δ","Θ","Λ","Ξ","Π","Σ",
+    "Γ", "Δ", "Θ", "Λ", "Ξ", "Π", "Σ",
-    "Φ","Ψ","Ω","ₐ","ₑ","ₒ","ₓ",
+    "Φ", "Ψ", "Ω", "ₐ", "ₑ", "ₒ", "ₓ",
-    "ₕ","ₖ","ₗ","ₘ","ₙ","ₚ","ₛ",
+    "ₕ", "ₖ", "ₗ", "ₘ", "ₙ", "ₚ", "ₛ",
-    "ₜ","¹","²","³","⁴","⁵","⁶",
+    "ₜ", "¹", "²", "³", "⁴", "⁵", "⁶",
-    "⁷","⁸","⁹","⁰","₁","₂","₃",
+    "⁷", "⁸", "⁹", "⁰", "₁", "₂", "₃",
-    "₄","₅","₆","₇","₈","₉","₀",
+    "₄", "₅", "₆", "₇", "₈", "₉", "₀",
     "pi", "∞"]
-const equivalchars = ["\\alpha","\\beta","\\gamma","\\delta","\\epsilon","\\zeta","\\eta",
+const equivalchars = ["\\alpha", "\\beta", "\\gamma", "\\delta", "\\epsilon", "\\zeta", "\\eta",
-    "\\pi","\\theta","\\kappa","\\lambda","\\mu","\\xi","\\rho",
+    "\\pi", "\\theta", "\\kappa", "\\lambda", "\\mu", "\\xi", "\\rho",
-    "\\sigma","\\sigma","\\tau","\\phi","\\chi","\\psi","\\omega",
+    "\\sigma", "\\sigma", "\\tau", "\\phi", "\\chi", "\\psi", "\\omega",
-    "\\Gamma","\\Delta","\\Theta","\\Lambda","\\Xi","\\Pi","\\Sigma",
+    "\\Gamma", "\\Delta", "\\Theta", "\\Lambda", "\\Xi", "\\Pi", "\\Sigma",
-    "\\Phy","\\Psi","\\Omega","{}_{a}","{}_{e}","{}_{o}","{}_{x}",
+    "\\Phy", "\\Psi", "\\Omega", "{}_{a}", "{}_{e}", "{}_{o}", "{}_{x}",
-    "{}_{h}","{}_{k}","{}_{l}","{}_{m}","{}_{n}","{}_{p}","{}_{s}",
+    "{}_{h}", "{}_{k}", "{}_{l}", "{}_{m}", "{}_{n}", "{}_{p}", "{}_{s}",
-    "{}_{t}","{}^{1}","{}^{2}","{}^{3}","{}^{4}","{}^{5}","{}^{6}",
+    "{}_{t}", "{}^{1}", "{}^{2}", "{}^{3}", "{}^{4}", "{}^{5}", "{}^{6}",
-    "{}^{7}","{}^{8}","{}^{9}","{}^{0}","{}_{1}","{}_{2}","{}_{3}",
+    "{}^{7}", "{}^{8}", "{}^{9}", "{}^{0}", "{}_{1}", "{}_{2}", "{}_{3}",
-    "{}_{4}","{}_{5}","{}_{6}","{}_{7}","{}_{8}","{}_{9}","{}_{0}",
+    "{}_{4}", "{}_{5}", "{}_{6}", "{}_{7}", "{}_{8}", "{}_{9}", "{}_{0}",
     "\\pi", "\\infty"]
 
 /**
  * Class containing the result of a LaTeX render.
- * 
+ *
  * @property {string} source - Exported PNG file
- * @property {number} width 
+ * @property {number} width
- * @property {number} height 
+ * @property {number} height
  */
 class LatexRenderResult {
     constructor(source, width, height) {
@@ -56,7 +58,7 @@ class LatexRenderResult {
 
 class LatexAPI extends Module {
     constructor() {
-        super('Latex', [
+        super("Latex", [
             /** @type {ExprParserAPI} */
             Modules.ExprParser
         ])
@@ -65,10 +67,10 @@ class LatexAPI extends Module {
          */
         this.enabled = Helper.getSettingBool("enable_latex")
     }
-    
+
     /**
      * Prepares and renders a latex string into a png file.
-     * 
+     *
      * @param {string} markup - LaTeX markup to render.
      * @param {number} fontSize - Font size (in pt) to render.
      * @param {color} color - Color of the text to render.
@@ -78,11 +80,11 @@ class LatexAPI extends Module {
         let args = Latex.render(markup, fontSize, color).split(",")
         return new LatexRenderResult(...args)
     }
-    
+
     /**
      * Checks if the given markup (with given font size and color) has already been
      * rendered, and if so, returns its data. Otherwise, returns null.
-     * 
+     *
      * @param {string} markup - LaTeX markup to render.
      * @param {number} fontSize - Font size (in pt) to render.
      * @param {color} color - Color of the text to render.
@@ -95,14 +97,14 @@ class LatexAPI extends Module {
             ret = new LatexRenderResult(...data.split(","))
         return ret
     }
-    
+
     /**
      * Prepares and renders a latex string into a png file asynchronously.
-     * 
+     *
      * @param {string} markup - LaTeX markup to render.
      * @param {number} fontSize - Font size (in pt) to render.
      * @param {color} color - Color of the text to render.
-     * @returns {Promize<LatexRenderResult>}
+     * @returns {Promise<LatexRenderResult>}
      */
     requestAsyncRender(markup, fontSize, color) {
         return new Promise(resolve => {
@@ -113,11 +115,11 @@ class LatexAPI extends Module {
     /**
      * Puts element within parenthesis.
      *
-     * @param {string} elem - element to put within parenthesis.
+     * @param {string|number} elem - element to put within parenthesis.
      * @returns {string}
      */
     par(elem) {
-        return '(' + elem + ')'
+        return `(${elem})`
     }
 
     /**
@@ -125,16 +127,16 @@ class LatexAPI extends Module {
      * the string array contents, but not at the first position of the string,
      * and returns the parenthesis version if so.
      *
-     * @param {string} elem - element to put within parenthesis.
+     * @param {string|number} elem - element to put within parenthesis.
      * @param {Array} contents - Array of elements to put within parenthesis.
      * @returns {string}
      */
     parif(elem, contents) {
         elem = elem.toString()
-        if(elem[0] !== "(" && elem[elem.length-1] !== ")" && contents.some(x => elem.indexOf(x) > 0))
+        if(elem[0] !== "(" && elem[elem.length - 1] !== ")" && contents.some(x => elem.indexOf(x) > 0))
             return this.par(elem)
-        if(elem[0] === "(" && elem[elem.length-1] === ")")
+        if(elem[0] === "(" && elem[elem.length - 1] === ")")
-            return elem.substr(1, elem.length-2)
+            return elem.substr(1, elem.length - 2)
         return elem
     }
 
@@ -149,31 +151,24 @@ class LatexAPI extends Module {
         switch(f) {
             case "derivative":
                 if(args.length === 3)
-                    return '\\frac{d' + args[0].substr(1, args[0].length-2).replace(new RegExp(args[1].substr(1, args[1].length-2), 'g'), 'x') + '}{dx}';
+                    return "\\frac{d" + args[0].substr(1, args[0].length - 2).replace(new RegExp(args[1].substr(1, args[1].length - 2), "g"), "x") + "}{dx}"
                 else
-                    return '\\frac{d' + args[0] + '}{dx}(x)';
+                    return "\\frac{d" + args[0] + "}{dx}(x)"
-                break;
             case "integral":
                 if(args.length === 4)
-                    return '\\int\\limits_{' + args[0] + '}^{' + args[1] + '}' + args[2].substr(1, args[2].length-2) + ' d' + args[3].substr(1, args[3].length-2);
+                    return "\\int\\limits_{" + args[0] + "}^{" + args[1] + "}" + args[2].substr(1, args[2].length - 2) + " d" + args[3].substr(1, args[3].length - 2)
                 else
-                    return '\\int\\limits_{' + args[0] + '}^{' + args[1] + '}' + args[2] + '(t) dt';
+                    return "\\int\\limits_{" + args[0] + "}^{" + args[1] + "}" + args[2] + "(t) dt"
-                break;
             case "sqrt":
-                return '\\sqrt\\left(' + args.join(', ') + '\\right)';
+                return "\\sqrt\\left(" + args.join(", ") + "\\right)"
-                break;
             case "abs":
-                return '\\left|' + args.join(', ') + '\\right|';
+                return "\\left|" + args.join(", ") + "\\right|"
-                break;
             case "floor":
-                return '\\left\\lfloor' + args.join(', ') + '\\right\\rfloor';
+                return "\\left\\lfloor" + args.join(", ") + "\\right\\rfloor"
-                break;
             case "ceil":
-                return '\\left\\lceil' + args.join(', ') + '\\right\\rceil';
+                return "\\left\\lceil" + args.join(", ") + "\\right\\rceil"
-                break;
             default:
-                return '\\mathrm{' + f + '}\\left(' + args.join(', ') + '\\right)';
+                return "\\mathrm{" + f + "}\\left(" + args.join(", ") + "\\right)"
-                break;
         }
     }
 
@@ -188,150 +183,146 @@ class LatexAPI extends Module {
         if(wrapIn$)
             for(let i = 0; i < unicodechars.length; i++) {
                 if(vari.includes(unicodechars[i]))
-                    vari = vari.replace(new RegExp(unicodechars[i], 'g'), '$'+equivalchars[i]+'$')
+                    vari = vari.replace(new RegExp(unicodechars[i], "g"), "$" + equivalchars[i] + "$")
             }
         else
             for(let i = 0; i < unicodechars.length; i++) {
                 if(vari.includes(unicodechars[i]))
-                    vari = vari.replace(new RegExp(unicodechars[i], 'g'), equivalchars[i])
+                    vari = vari.replace(new RegExp(unicodechars[i], "g"), equivalchars[i])
             }
-        return vari;
+        return vari
     }
 
     /**
-     * Converts expr-eval tokens to a latex string.
+     * Converts expr-eval instructions to a latex string.
      *
-     * @param {Array} tokens - expr-eval tokens list
+     * @param {Instruction[]} instructions - expr-eval tokens list
      * @returns {string}
      */
-    expression(tokens) {
+    expression(instructions) {
         let nstack = []
         let n1, n2, n3
         let f, args, argCount
-        for (let i = 0; i < tokens.length; i++) {
+        for(let item of instructions) {
-            let item = tokens[i]
             let type = item.type
 
             switch(type) {
-                case Modules.ExprParser.Internals.INUMBER:
+                case Instruction.INUMBER:
                     if(item.value === Infinity) {
                         nstack.push("\\infty")
-                    } else if(typeof item.value === 'number' && item.value < 0) {
+                    } else if(typeof item.value === "number" && item.value < 0) {
-                        nstack.push(this.par(item.value));
+                        nstack.push(this.par(item.value))
                     } else if(Array.isArray(item.value)) {
-                        nstack.push('[' + item.value.map(Modules.ExprParser.Internals.escapeValue).join(', ') + ']');
+                        nstack.push("[" + item.value.map(escapeValue).join(", ") + "]")
                     } else {
-                        nstack.push(Modules.ExprParser.Internals.escapeValue(item.value));
+                        nstack.push(escapeValue(item.value))
                     }
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IOP2:
+                case Instruction.IOP2:
-                    n2 = nstack.pop();
+                    n2 = nstack.pop()
-                    n1 = nstack.pop();
+                    n1 = nstack.pop()
-                    f = item.value;
+                    f = item.value
                     switch(f) {
-                        case '-':
+                        case "-":
-                        case '+':
+                        case "+":
-                            nstack.push(n1 + f + n2);
+                            nstack.push(n1 + f + n2)
-                            break;
+                            break
-                        case '||':
+                        case "||":
-                        case 'or':
+                        case "or":
-                        case '&&':
+                        case "&&":
-                        case 'and':
+                        case "and":
-                        case '==':
+                        case "==":
-                        case '!=':
+                        case "!=":
-                            nstack.push(this.par(n1) + f + this.par(n2));
+                            nstack.push(this.par(n1) + f + this.par(n2))
-                            break;
+                            break
-                        case '*':
+                        case "*":
-                            if(n2 == "\\pi" || n2 == "e" || n2 == "x" || n2 == "n")
+                            if(n2 === "\\pi" || n2 === "e" || n2 === "x" || n2 === "n")
-                                nstack.push(this.parif(n1,['+','-']) + n2)
+                                nstack.push(this.parif(n1, ["+", "-"]) + n2)
                             else
-                                nstack.push(this.parif(n1,['+','-']) + " \\times " + this.parif(n2,['+','-']));
+                                nstack.push(this.parif(n1, ["+", "-"]) + " \\times " + this.parif(n2, ["+", "-"]))
-                            break;
+                            break
-                        case '/':
+                        case "/":
-                            nstack.push("\\frac{" + n1 + "}{" + n2 + "}");
+                            nstack.push("\\frac{" + n1 + "}{" + n2 + "}")
-                            break;
+                            break
-                        case '^':
+                        case "^":
-                            nstack.push(this.parif(n1,['+','-','*','/','!'])  + "^{" + n2 + "}");
+                            nstack.push(this.parif(n1, ["+", "-", "*", "/", "!"]) + "^{" + n2 + "}")
-                            break;
+                            break
-                        case '%':
+                        case "%":
-                            nstack.push(this.parif(n1,['+','-','*','/','!','^']) + " \\mathrm{mod} " + parif(n2,['+','-','*','/','!','^']));
+                            nstack.push(this.parif(n1, ["+", "-", "*", "/", "!", "^"]) + " \\mathrm{mod} " + this.parif(n2, ["+", "-", "*", "/", "!", "^"]))
-                            break;
+                            break
-                        case '[':
+                        case "[":
-                            nstack.push(n1 + '[' + n2 + ']');
+                            nstack.push(n1 + "[" + n2 + "]")
-                            break;
+                            break
                         default:
-                            throw new EvalError("Unknown operator " + ope + ".");
+                            throw new EvalError("Unknown operator " + item.value + ".")
                     }
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IOP3: // Thirdiary operator
+                case Instruction.IOP3: // Thirdiary operator
-                    n3 = nstack.pop();
+                    n3 = nstack.pop()
-                    n2 = nstack.pop();
+                    n2 = nstack.pop()
-                    n1 = nstack.pop();
+                    n1 = nstack.pop()
-                    f = item.value;
+                    f = item.value
-                    if (f === '?') {
+                    if(f === "?") {
-                        nstack.push('(' + n1 + ' ? ' + n2 + ' : ' + n3 + ')');
+                        nstack.push("(" + n1 + " ? " + n2 + " : " + n3 + ")")
                     } else {
-                        throw new EvalError('Unknown operator ' + ope + '.');
+                        throw new EvalError("Unknown operator " + item.value + ".")
                     }
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IVAR:
+                case Instruction.IVAR:
-                case Modules.ExprParser.Internals.IVARNAME:
+                case Instruction.IVARNAME:
-                    nstack.push(this.variable(item.value.toString()));
+                    nstack.push(this.variable(item.value.toString()))
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IOP1: // Unary operator
+                case Instruction.IOP1: // Unary operator
-                    n1 = nstack.pop();
+                    n1 = nstack.pop()
-                    f = item.value;
+                    f = item.value
                     switch(f) {
-                        case '-':
+                        case "-":
-                        case '+':
+                        case "+":
-                            nstack.push(this.par(f + n1));
+                            nstack.push(this.par(f + n1))
-                            break;
+                            break
-                        case '!':
+                        case "!":
-                            nstack.push(this.parif(n1,['+','-','*','/','^']) + '!');
+                            nstack.push(this.parif(n1, ["+", "-", "*", "/", "^"]) + "!")
-                            break;
+                            break
                         default:
-                            nstack.push(f + this.parif(n1,['+','-','*','/','^']));
+                            nstack.push(f + this.parif(n1, ["+", "-", "*", "/", "^"]))
-                            break;
+                            break
                     }
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IFUNCALL:
+                case Instruction.IFUNCALL:
-                    argCount = item.value;
+                    argCount = item.value
-                    args = [];
+                    args = []
-                    while (argCount-- > 0) {
+                    while(argCount-- > 0) {
-                        args.unshift(nstack.pop());
+                        args.unshift(nstack.pop())
                     }
-                    f = nstack.pop();
+                    f = nstack.pop()
                     // Handling various functions
                     nstack.push(this.functionToLatex(f, args))
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IFUNDEF:
+                case Instruction.IMEMBER:
-                    nstack.push(this.par(n1 + '(' + args.join(', ') + ') = ' + n2));
+                    n1 = nstack.pop()
-                    break;
+                    nstack.push(n1 + "." + item.value)
-                case Modules.ExprParser.Internals.IMEMBER:
+                    break
-                    n1 = nstack.pop();
+                case Instruction.IARRAY:
-                    nstack.push(n1 + '.' + item.value);
+                    argCount = item.value
-                    break;
+                    args = []
-                case Modules.ExprParser.Internals.IARRAY:
+                    while(argCount-- > 0) {
-                    argCount = item.value;
+                        args.unshift(nstack.pop())
-                    args = [];
-                    while (argCount-- > 0) {
-                        args.unshift(nstack.pop());
                     }
-                    nstack.push('[' + args.join(', ') + ']');
+                    nstack.push("[" + args.join(", ") + "]")
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IEXPR:
+                case Instruction.IEXPR:
-                    nstack.push('(' + this.expression(item.value) + ')');
+                    nstack.push("(" + this.expression(item.value) + ")")
-                    break;
+                    break
-                case Modules.ExprParser.Internals.IENDSTATEMENT:
+                case Instruction.IENDSTATEMENT:
-                    break;
+                    break
                 default:
-                    throw new EvalError('invalid Expression');
+                    throw new EvalError("invalid Expression")
             }
         }
-        if (nstack.length > 1) {
+        if(nstack.length > 1) {
-            nstack = [ nstack.join(';') ]
+            nstack = [nstack.join(";")]
         }
-        return String(nstack[0]);
+        return String(nstack[0])
     }
 }