mutable decl syntax change

testbed/game/main.bro

@@ -77,8 +77,8 @@ read_command func() Command {
     if IsMouseButtonPressed(MOUSE_BUTTON_LEFT) return .spawn{ GetMousePosition() }
     if IsKeyPressed(KEY_SPACE) return .clear
 
-    fx f32 = 0.0
-    fy f32 = 0.0
+    fx f32 := 0.0
+    fy f32 := 0.0
     if IsKeyDown(KEY_A) fx -= FORCE
     if IsKeyDown(KEY_D) fx += FORCE
     if IsKeyDown(KEY_W) fy -= FORCE
@@ -128,14 +128,14 @@ step func(b @mut Ball) void {
 
 draw_ball func(b @Ball, highlight bool) void {
     col :: color_for(b.kind)
-    center Vector2 = Vector2{ x = b.x, y = b.y }
+    center Vector2 := Vector2{ x = b.x, y = b.y }
     match b.kind {
         .circle: DrawCircleV(center, b.radius, col)
         .square: DrawPoly(center, 4, b.radius, 45.0, col)
         .triangle: DrawPoly(center, 3, b.radius, 0.0, col)
     }
     if highlight {
-        ring Color = Color{ r = 250, g = 245, b = 200, a = 255 }
+        ring Color := Color{ r = 250, g = 245, b = 200, a = 255 }
         DrawPoly(center, 24, b.radius + RING_PAD, 0.0, ring)
     }
 }
@@ -150,11 +150,11 @@ main func() i32 {
         `[click] spawn a shape   [WASD/arrows] blow wind
         `[space] clear
 
-    balls [CAP]mut Ball = undefined
-    count usize = 0                  # number of live balls, in slots 0..count
-    kc Kind = .circle                # next kind to spawn
-    spin f32 = 1.0                   # rotates spawn velocity for variety
-    at_cap bool = false              # show the "at capacity" banner
+    balls [CAP]mut Ball := undefined
+    count usize := 0                  # number of live balls, in slots 0..count
+    kc Kind := .circle                # next kind to spawn
+    spin f32 := 1.0                   # rotates spawn velocity for variety
+    at_cap bool := false              # show the "at capacity" banner
 
     bg :: Color{ r = 24, g = 26, b = 34, a = 255 }
     text :: Color{ r = 225, g = 225, b = 230, a = 255 }
@@ -209,7 +209,7 @@ main func() i32 {
         # --- which shape is under the cursor? (optional via a value-loop) ---
         mouse :: GetMousePosition()
         sel :: for 0..(count) |i| blk: {
-            c Vector2 = Vector2{ x = balls[i].x, y = balls[i].y }
+            c Vector2 := Vector2{ x = balls[i].x, y = balls[i].y }
             if CheckCollisionPointCircle(mouse, c, balls[i].radius) yield :blk i
             yield null
         }
@@ -220,7 +220,7 @@ main func() i32 {
 
         for (&balls) |@b, i| {
             if (i >= count) break
-            hot bool = false
+            hot bool := false
             if sel |s| {
                 if (s == i) hot = true    # true only for the hovered ball
             }