lispToMmix/js/lexer.js

export class LISPstring extends String {
    #l;
    #c;
    constructor(string, line, char) {
        super(string);
        this.#l = line;
        this.#c = char;
    }
    get lineCount() {
        return this.#l;
    }
    get charCount() {
        return this.#l;
    }
    get pos() {
        return [this.#l, this.#c];
    }
}

export class LISPcmd extends Array {
    #l;
    #c;

    constructor(code, line, char) {
        var childs = cutCmd(code, line, char);

        super(...childs);
        this.#l = line;
        this.#c = char;
    }
    get lineCount() {
        return this.#l;
    }
    get charCount() {
        return this.#l;
    }
    get pos() {
        return [this.#l, this.#c];
    }
    get array(){
        return new Array(...this);
    }
}

export function error(msg, l = null, c = null) {
    var out = "Error"
    if (l != null && c != null) out += ` in line ${l} and character ${c}`;
    out += ": " + msg;
    console.log("\x1b[31m", out, "\x1b[0m");
    process.exit(1);
}

var lispSeperator = [" ", ":", "\n"];

function cutCmd(code, line, chars) {
    if (!code.startsWith("(")) return ["", error("Compiler Error", line, chars)];

    if (!code.endsWith(")")) return ["", error("Compiler Error", line, chars)];

    code = code.substring(1, code.length - 1);

    var countLinesBegin = line;
    var countCharsBegin = chars;

    var countLines = line;
    var countChars = chars;
    var inC = 0;
    var wasinC = false;
    var inStr = 0;
    var buffer = "";
    var i = 0;
    var out = [];

    function finishBuff() {
        out.push(
            wasinC ?
                new LISPcmd(buffer.trim(), countLinesBegin, countCharsBegin)
                :
                new LISPstring(buffer.trim(), countLinesBegin, countCharsBegin)
        );
        countLinesBegin = countLines;
        countCharsBegin = countChars;
        buffer = "";
        wasinC = false;
    }

    for (var i = 0; i < code.length; i++) {

        countChars++;
        //console.log(code,countLines,countChars);
        let c = code[i];
        if (!inC && !inStr) {
            countLinesBegin = countLines;
            countCharsBegin = countChars;
        }
        if (c == "\\") {
            buffer += code[++i];
            continue;
        }
        if (inStr) {
            if (c == "\n") {
                countLines++;
                countChars = 0;
            } else if (c == '"') {
                buffer += c;
                if (!inC) finishBuff();
                inStr = false;
            } else {
                buffer += c;
            }
            continue;
        }
        if (c == '"') {
            inStr = true;
            buffer += c;
            continue;
        }
        if (c == ";" && !inC) {
            while (code[++i] != "\n") { }
            countLines++;
            countChars = 0;
            continue;
        }
        if (c == "\n") {
            countLines++;
            countChars = 0;
        }
        if (/*(c == " "||c=="\n")*/lispSeperator.includes(c) && !inC) {
            if (buffer.trim() != "") {
                finishBuff();
            }
            continue;
        }
        if (c == "(") {
            if (!inC && buffer.trim() != "") {
                finishBuff();
            }
            inC++;
            wasinC = true;
        }
        if (c == ")") {
            inC--;
            if (inC < 0) error("Closing braket to much!", countLines, countChars);
            if (!inC) {
                buffer += c;
                finishBuff();
                continue;
            }
        }
        buffer += c;

    }
    if (inStr) error("Missing closing quotation mark!", countLines, countChars);
    if (inC) error("Missing closing braket!", countLines, countChars);

    if (buffer.trim() != "") finishBuff();

    return out;
}


export function createType(data) {
    if (data == "true") {
        return ["bool", 1];
    }
    if (data == "false") {
        return ["bool", 0];
    }
    /*if (data == "NaN") {
        return ["num", NaN];
    }*/
    if ((data instanceof LISPstring)&&data.startsWith('"') && data.endsWith('"')){
      return ["str", data.slice(1,-1)];
    }
    if ((data instanceof LISPstring) && !isNaN(data)) {
        return ["num", Number(data)];
    }
    if (data instanceof LISPcmd) {
        return ["code", data];
    }
    return ["var", data];
}