Javascript compiler targeting C++/V8
Building
Requires Node.
$ yarnExample
$ yarn tsc
$ node build/jsc.js tests/tco.js
$ node bin/index.js
12586269025
Features
- Functions and function calls
- Basic tail-call optimization
- Var, const, let declarations
- For, do, while statements
- Basic primitive operations
- Basic import support
- Number, string, boolean and null literals
- Basic value unboxing
Not (yet) supported
- Prototype functions
- Nested functions
- Closures
- And much, much more!
Code produced
The following:
function fib(n: number, a: number, b: number) {
if (n == 0) {
return a;
}
if (n == 1) {
return b;
}
return fib(n - 1, b, a + b);
}Gets compiled to:
void tco_fib(const FunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
double tco_n = toNumber(args[0]);
double tco_a = toNumber(args[1]);
double tco_b = toNumber(args[2]);
tail_recurse_1:
;
bool sym_if_test_58 = (tco_n == 0);
if (sym_if_test_58) {
args.GetReturnValue().Set(Number::New(isolate, tco_a));
return;
}
bool sym_if_test_70 = (tco_n == 1);
if (sym_if_test_70) {
args.GetReturnValue().Set(Number::New(isolate, tco_b));
return;
}
Local<Value> sym_arg_83 = Number::New(isolate, (tco_n - 1));
Local<Value> sym_arg_92 = Number::New(isolate, (tco_a + tco_b));
tco_n = toNumber(sym_arg_83);
tco_a = tco_b;
tco_b = toNumber(sym_arg_92);
goto tail_recurse_1;
}