fix: Add unimplemented error for first-class built-ins (#2240)

Author: romdotdog

src/compiler.ts

@@ -7756,6 +7756,14 @@ export class Compiler extends DiagnosticEmitter {
           uniqueMap<string,Type>(flow.contextualTypeArguments)
         );
         if (!functionInstance || !this.compileFunction(functionInstance)) return module.unreachable();
+        if (functionInstance.hasDecorator(DecoratorFlags.BUILTIN)) {
+          this.error(
+            DiagnosticCode.Not_implemented_0,
+            expression.range, "First-class built-ins"
+          );
+          this.currentType = functionInstance.type;
+          return module.unreachable();
+        }
         if (contextualType.isExternalReference) {
           this.currentType = Type.funcref;
           return module.ref_func(functionInstance.internalName, TypeRef.Funcref); // TODO

tests/compiler/issues/2202.json

@@ -0,0 +1,24 @@
+{
+  "asc_flags": [
+  ],
+  "stderr": [
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "AS100: Not implemented: First-class built-ins",
+    "EOF"
+  ]
+}

tests/compiler/issues/2202.ts

@@ -0,0 +1,18 @@
+i16;
+i32;
+i64;
+u8;
+u16;
+u32;
+u64;
+bool;
+f32;
+f64;
+v128;
+i8x16;
+i16x8;
+i32x4;
+i64x2;
+f32x4;
+f64x2;
+ERROR("EOF");