Method install

src/parsetree/features/def.js:34–82

(target, source, funcArgs, runtime)

    }

    install(target, source, funcArgs, runtime) {
        const args = this.args;
        const start = this.start;
        const errorHandler = this.errorHandler;
        const errorSymbol = this.errorSymbol;
        const finallyHandler = this.finallyHandler;
        const nameVal = this.nameVal;
        const nameSpace = this.nameSpace;
        const funcName = this.name;
        const functionFeature = this;

        var func = function () {
            // null, worker
            var ctx = runtime.makeContext(source, functionFeature, target, null);

            // install error handler if any
            ctx.meta.errorHandler = errorHandler;
            ctx.meta.errorSymbol = errorSymbol;
            ctx.meta.finallyHandler = finallyHandler;

            for (var i = 0; i < args.length; i++) {
                var name = args[i];
                var argumentVal = arguments[i];
                if (name) {
                    ctx.locals[name.value] = argumentVal;
                }
            }
            ctx.meta.caller = arguments[args.length];
            if (ctx.meta.caller) {
                ctx.meta.callingCommand = ctx.meta.caller.meta.command;
            }
            var resolve, reject;
            var promise = new Promise(function (theResolve, theReject) {
                resolve = theResolve;
                reject = theReject;
            });
            start.execute(ctx);
            if (ctx.meta.returned) {
                return ctx.meta.returnValue;
            } else {
                ctx.meta.resolve = resolve;
                ctx.meta.reject = reject;
                return promise;
            }
        };
        func.hyperfunc = true;
        func.hypername = nameVal;
        runtime.assignToNamespace(target, nameSpace, funcName, func);
    }

    static parse(parser) {
        if (!parser.matchToken("def")) return;