Step 151: add Go parser and generator

editor/tests/step151_test.cpp

@@ -0,0 +1,69 @@
+// Step 151 TDD Test: Go CST-to-AST + generator
+#include "ast/Parser.h"
+#include "ast/Generator.h"
+#include <iostream>
+
+static void expect(bool cond, const std::string& name, int& passed, int& failed) {
+    if (cond) {
+        std::cout << "Test " << (passed + failed + 1) << " PASS: " << name << "\n";
+        ++passed;
+    } else {
+        std::cout << "Test " << (passed + failed + 1) << " FAIL: " << name << "\n";
+        ++failed;
+    }
+}
+
+int main() {
+    int passed = 0;
+    int failed = 0;
+
+    std::string go = R"(
+package main
+
+import "fmt"
+
+type Box struct {
+  value int
+}
+
+func (b *Box) Size(n int) int {
+  return n + 1
+}
+
+func Add(a int, b int) int {
+  c := a + b
+  return c
+}
+)";
+
+    auto mod = TreeSitterParser::parseGo(go);
+    expect(mod != nullptr, "go module created", passed, failed);
+    auto funcs = mod->getChildren("functions");
+    expect(funcs.size() >= 2, "go functions discovered", passed, failed);
+
+    bool foundAdd = false;
+    bool foundMethod = false;
+    for (const auto* fnNode : funcs) {
+        if (fnNode->conceptType != "Function") continue;
+        auto* fn = static_cast<const Function*>(fnNode);
+        if (fn->name == "Add") foundAdd = true;
+        if (fn->name.find("Box.") == 0) foundMethod = true;
+    }
+    expect(foundAdd, "go top-level function name", passed, failed);
+    expect(foundMethod, "go method name with receiver", passed, failed);
+
+    GoGenerator gen;
+    std::string out = gen.generate(mod.get());
+    expect(out.find("package") != std::string::npos,
+           "go package generated", passed, failed);
+    expect(out.find("import") != std::string::npos,
+           "go imports generated", passed, failed);
+    expect(out.find("func Add") != std::string::npos,
+           "go function signature generated", passed, failed);
+    expect(out.find("func (b *Box)") != std::string::npos,
+           "go method receiver generated", passed, failed);
+
+    std::cout << "\n=== Step 151 Results: " << passed << " passed, "
+              << failed << " failed ===\n";
+    return failed == 0 ? 0 : 1;
+}