Method registerParseElement

src/core/kernel.js:306–341

* Register a parse element class based on its static metadata. * Commands need `static keyword`, expressions need `static grammarName`.

(ElementClass)

     * Commands need `static keyword`, expressions need `static grammarName`.
     */
    registerParseElement(ElementClass) {
        if (!ElementClass.parse) return;

        const parse = ElementClass.parse.bind(ElementClass);

        // Commands with keyword (supports string or array of strings)
        if (ElementClass.keyword && ElementClass.prototype instanceof Command) {
            var keywords = Array.isArray(ElementClass.keyword) ? ElementClass.keyword : [ElementClass.keyword];
            for (var kw of keywords) this.addCommand(kw, parse);
            return;
        }

        // Features with keyword (supports string or array of strings)
        if (ElementClass.keyword && ElementClass.prototype instanceof Feature) {
            var keywords = Array.isArray(ElementClass.keyword) ? ElementClass.keyword : [ElementClass.keyword];
            for (var kw of keywords) this.addFeature(kw, parse);
            return;
        }

        // Grammar elements with grammarName
        const name = ElementClass.grammarName;
        if (!name) return;

        switch (ElementClass.expressionType) {
            case 'leaf':     this.addLeafExpression(name, parse); break;
            case 'indirect': this.addIndirectExpression(name, parse); break;
            case 'unary':    this.addUnaryExpression(name, parse); break;
            case 'top':      this.addTopExpression(name, parse); break;
            case 'postfix':  this.addPostfixExpression(name, parse); break;
            default:         this.addGrammarElement(name, parse); break;
        }

        if (ElementClass.assignable) {
            this.#assignableExpressions.push(name);
        }
    }

    /**
     * Register all exported parse element classes from a module.