Javascript compiler targeting C++/V8

Building

Requires Node.

$ yarn

Example

$ 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 unbo xing

Not (yet) supported

• Prototype functions
• Nested functions
• Closures
• And much, much more!

Code produced

The following:

functionfib(n:number,a:number,b:number){
if(n==0){
returna;
}

if(n==1){
returnb;
}

returnfib(n-1,b,a+b);
}

Gets compiled to:

voidtco_fib(constFunctionCallbackInfo<Value> &args) {
Isolate *isolate = args.GetIsolate();
doubletco_n =toNumber(args[0]);
doubletco_a =toNumber(args[1]);
doubletco_b =toNumber(args[2]);

tail_recurse_1:

;

boolsym_if_test_58 = (tco_n ==0);
if(sym_if_test_58) {
args.GetReturnValue().Set(Number::New(isolate, tco_a));
return;
}

boolsym_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);
gototail_recurse_1;
}