init commit

test/parse/foreign_overload.golden

@@ -0,0 +1,26 @@
+(program	
+ (foreign fun mul -> float2
+  [(:= float2) 
+   (:= float2)])
+
+ (foreign fun mul -> float3
+  [(:= float3) 
+   (:= float3)])
+
+ (foreign fun mul -> float4
+  [(:= float4) 
+   (:= float4)])
+
+ (foreign fun mul -> float4x4
+  [(:= float4x4) 
+   (:= float4x4)])
+
+ (foreign fun float2 -> float2
+  [(:= float) 
+   (:= float)])
+
+ (fun vertex vs_main
+  [] 
+  (:= v1 float2 (float2 1 1)) 
+  (:= v2 float2 (float2 3 3)) 
+  (:= v3 float2 (mul v1 v2))))