alang

alang is a TypeScript to C transpiler. A small subset of TypeScript is supported which maps well with C in order to achieve the best performance.

• a simple mark and sweep garbage collector is used with option for manual memory management
• value type always has to be specified
• a custom api is used which maps directly to the C api
• nested functions are supported but they can not access values from the parent function scope

alang.js: TS transpiler written in JS. This is used during amake build process to translate alang.ts (see below) into C.

alang.ts: Transpiler written in TS itself. It is a part of amake binary and is used to transpile all .ts files contained in the project.

// TS
type point_t = {
	x: f32;
	y: f32;
};

function add(a: point_t, b: point_t) {
	a.x += b.x;
	a.y += b.y;
}

function main() {
	let a: point_t = { x: 1.0, y: 2.0 };
	let b: point_t = { x: 3.0, y: 4.0 };
	add(a, b);
}

// C
#include <iron.h>

typedef struct point {
	f32 x;
	f32 y;
} point_t;

void add(point_t *a, point_t *b) {
	a->x += b->x;
	a->y += b->y;
}

void main() {
	point_t *a = GC_ALLOC_INIT(point_t, { .x = 1.0, .y = 2.0 });
	point_t *b = GC_ALLOC_INIT(point_t, { .x = 3.0, .y = 4.0 });
	add(a, b);
}