codegen: known value Function hack

test262: 50.76% (+0.14) | 🧪 48381 | 🤠 24556 (+64) | ❌ 6877 (+30) | 💀 15397 (-95) | 🏗️ 150 | 💥 330 | ⏰ 135 (+1) | 📝 936

compiler/codegen.js

@@ -2026,7 +2026,7 @@ const generateCall = (scope, decl, _global, _name, unusedValue = false) => {
 
       let parsed;
       try {
-        parsed = parse(code, []);
+        parsed = parse(code);
       } catch (e) {
         if (e.name === 'SyntaxError') {
           // throw syntax errors of evals at runtime instead
@@ -2058,6 +2058,31 @@ const generateCall = (scope, decl, _global, _name, unusedValue = false) => {
     }
   }
 
+  if (name === 'Function') {
+    const known = knownValue(scope, decl.arguments[0]);
+    if (known !== unknownValue) {
+      // known value literal Function hack
+      const code = String(known);
+
+      let parsed;
+      try {
+        parsed = parse(`(function(){${code}})`);
+      } catch (e) {
+        if (e.name === 'SyntaxError') {
+          // throw syntax errors of evals at runtime instead
+          return internalThrow(scope, 'SyntaxError', e.message, true);
+        }
+
+        throw e;
+      }
+
+      return [
+        ...generate(scope, parsed.body[0].expression),
+        ...setLastType(scope, TYPES.function)
+      ];
+    }
+  }
+
   let protoName, target;
   // ident.func()
   if (!decl._new && name && name.startsWith('__')) {

package.json

@@ -1,7 +1,7 @@
 {
   "name": "porffor",
   "description": "a basic experimental wip aot optimizing js -> wasm engine/compiler/runtime in js",
-  "version": "0.50.0",
+  "version": "0.50.1",
   "author": "CanadaHonk",
   "license": "MIT",
   "scripts": {},

runner/index.js

@@ -1,6 +1,6 @@
 #!/usr/bin/env node
 import fs from 'node:fs';
-globalThis.version = '0.50.0';
+globalThis.version = '0.50.1';
 
 // deno compat
 if (typeof process === 'undefined' && typeof Deno !== 'undefined') {