[READ-ONLY] Mirror of https://github.com/probablykasper/limp. Programming language made in JS, for fun (unfinished)
limp.kasper.space
language
Basic AST parsing of operators
+26
-14
+26
-14
js/limp.js
+26
-14
js/limp.js
···
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if (type == "err") {
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console.error("[limp] "+msg);
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} else if (type == "inf") {
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console.log("[limp] "+msg);
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// console.log("[limp] "+msg);
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}
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}
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22
···
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// LEXER
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var stat = 0;
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var tokens = [];
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tokens[stat] = [];
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// var tokens = [];
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var statements = [];
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statements[stat] = [];
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var ast = [] // parseInputPosition
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+
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readNext();
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function readNext() {
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// limpLog("inf", `--- pos${pos} (${line}:${col})`);
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var value = "";
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var currentStat = tokens[stat];
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var currentStat = statements[stat];
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if (endOfInput()) {
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limpLog("inf", "---------------------------- script finished");
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// limpLog("inf", "---------------------------- script finished");
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parse();
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console.log(tokens);
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// limpLog("inf", statements);
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} else if ( isWhitespace() ) { // WHITESPACE
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value = "[whitespace]";
···
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jumpChar(-1);
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} else if ( currentCharIsString() ) { // STRING
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value = {type: "string", value: readString()};
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tokens[stat].push(value);
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statements[stat].push(value);
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} else if ( isDigit() ) { // NUMBER
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value = {type: "number", value: readNumber()};
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tokens[stat].push(value);
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statements[stat].push(value);
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} else if ( isPunctation() ) { // PUNCTATION
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value = {type: "punctation", value: currentChar()};
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tokens[stat].push(value);
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// statements[stat].push(value);
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if (currentChar() == ";") {
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stat++;
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tokens[stat] = [];
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statements[stat] = [];
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}
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} else if ( isOperator() ) { // OPERATOR
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value = readOperator();
···
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default:
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value = {type: "variable", value: value};
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}
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tokens[stat].push(value);
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statements[stat].push(value);
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} else {
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console.log(currentChar());
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limpLog("err", `Didn't understand character "${currentChar()}" at ${line}:${col}`);
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}
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if (value != "") {
···
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// PARSE
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function parse() {
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-
for (var tokenIndex = 0; tokenIndex < tokens.length; tokenIndex++) {
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var currentStat = tokens[tokenIndex];
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+
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+
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var ast = statements;
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// loop through statements & tokens
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for (var si = 0; si < ast.length; si++) { // statement index
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for (var ti = 0; ti < ast[si].length; ti++) { // token index
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var token = ast[si][ti];
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if (token.type == "operator") {
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token.left = ast[si][ti-1];
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token.right = ast[si][ti+1];
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ast[si].splice(ti-1, 3, token);
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}
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}
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}
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limpLog("inf", ast);
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}
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}