Updated attr grammar

parser/src/grammar.pest

@@ -19,18 +19,25 @@ var_decl =  { type_expr ~ mutable? ~ identifier }
 
 // ================= TOP LEVEL =================
 
-attribute_list = { sharp ~ "[" ~ attribute ~ ("," ~ attribute)* ~ "]" }
+attribute = {
-
+    "#" ~ "[" ~ (structured_style | list_style | key_value_style | simple_style) ~ "]"
-attribute = { static_path ~ attribute_args? }
-
-attribute_args = { "(" ~ (attr_expr ~ ("," ~ attr_expr)*)? ~ ")" }
-
-attr_expr = {
-    (identifier ~ "=" ~ primary)
-  | primary
 }
 
-top_level = _{ attribute_list* ~ (import | function_decl | struct_decl) }
+// Simple: #[test]
+simple_style = { identifier }
+
+// Key-Value: #[crate_type = "lib"]
+key_value_style = { identifier ~ "=" ~ primary }
+
+// #[derive(PartialEq, PartialOrd)]
+list_style = { identifier ~ "(" ~ identifier ~ ("," ~ identifier)* ~ ","? ~ ")" }
+
+// #[link(name = "readline")]
+structured_style = { identifier ~ "(" ~ pair ~ ("," ~ pair)* ~ ","? ~ ")" }
+
+pair = { identifier ~ "=" ~ primary }
+
+top_level = _{ attribute* ~ (import | function_decl | struct_decl) }
 
 import = { sharp ~ "include" ~ "<" ~ static_path ~ ">" }
 

test/src/main.mist

@@ -1,86 +1,5 @@
-public struct Vec2 {
+#[test]
-    f32 x,
+public struct ApiCall {
-    f32 y,
+    i32 x,
-}
+    i32 y,
-
-public struct Body {
-    Vec2 pos,
-    Vec2 vel,
-    f32 mass,
-}
-
-public struct World {
-    Body bodies,
-}
-
-// ---------- Utility Functions ----------
-
-public Vec2 add(Vec2 a, Vec2 b) {
-    return Vec2{ x: a.x + b.x, y: a.y + b.y };
-}
-
-public Vec2 scale(Vec2 v, f32 s) {
-    return Vec2{ x: v.x * s, y: v.y * s };
-}
-
-public f32 length(Vec2 v) {
-    return (v.x * v.x + v.y * v.y).sqrt();
-}
-
-// ---------- Physics Step ----------
-
-public void integrate(Body mut* body, f32 dt) {
-    body.pos = add(body.pos, scale(body.vel, dt));
-}
-
-public void apply_gravity(Body mut* body) {
-    // simple constant gravity
-    body.vel.y = body.vel.y - 9.81;
-}
-
-// ---------- Simulation ----------
-
-public void simulate(World mut* world, i32 steps, f32 dt) {
-    i32 i = 0;
-
-    while (i < steps) {
-        i = i + 1;
-
-        // pretend we have an array-like world.bodies
-        i32 j = 0;
-
-        while (j < 10) {
-            Body b = world.bodies[j];
-
-            apply_gravity(&mut b);
-            integrate(&mut b, dt);
-
-            world.bodies[j] = b;
-            j = j + 1;
-        }
-    }
-}
-
-// ---------- Debug / Logging ----------
-
-public void debug_body(Body b) {
-    println!("Body -> pos(", b.pos.x, ", ", b.pos.y, ")");
-}
-
-// ---------- Entry Point ----------
-
-public void main() {
-    Body player = Body{
-        pos: Vec2{ x: 0.0, y: 10.0 },
-        vel: Vec2{ x: 1.0, y: 0.0 },
-        mass: 1.0,
-    };
-
-    World world = World{
-        bodies: player
-    };
-
-    simulate(&mut world, 60, 0.016);
-
-    debug_body(world.bodies[0]);
 }