translate-c: we have our first test of self-hosted

See #1964

3 files changed, 68 insertions, 10 deletions

diff --git a/src/translate_c.cpp b/src/translate_c.cpp
index 64bf995cdd..71c0376130 100644
--- a/src/translate_c.cpp
+++ b/src/translate_c.cpp
@@ -4038,15 +4038,15 @@ static void visit_fn_decl(Context *c, const ZigClangFunctionDecl *fn_decl) {
     }
 
     proto_node->data.fn_proto.name = fn_name;
-    proto_node->data.fn_proto.is_extern = !((const clang::FunctionDecl*)fn_decl)->hasBody();
+    proto_node->data.fn_proto.is_extern = !ZigClangFunctionDecl_hasBody(fn_decl);
 
-    clang::StorageClass sc = ((const clang::FunctionDecl*)fn_decl)->getStorageClass();
-    if (sc == clang::SC_None) {
+    ZigClangStorageClass sc = ZigClangFunctionDecl_getStorageClass(fn_decl);
+    if (sc == ZigClangStorageClass_None) {
         proto_node->data.fn_proto.visib_mod = c->visib_mod;
-        proto_node->data.fn_proto.is_export = ((const clang::FunctionDecl*)fn_decl)->hasBody() ? c->want_export : false;
-    } else if (sc == clang::SC_Extern || sc == clang::SC_Static) {
+        proto_node->data.fn_proto.is_export = ZigClangFunctionDecl_hasBody(fn_decl) ? c->want_export : false;
+    } else if (sc == ZigClangStorageClass_Extern || sc == ZigClangStorageClass_Static) {
         proto_node->data.fn_proto.visib_mod = c->visib_mod;
-    } else if (sc == clang::SC_PrivateExtern) {
+    } else if (sc == ZigClangStorageClass_PrivateExtern) {
         emit_warning(c, ZigClangFunctionDecl_getLocation(fn_decl), "unsupported storage class: private extern");
         return;
     } else {
@@ -4058,7 +4058,7 @@ static void visit_fn_decl(Context *c, const ZigClangFunctionDecl *fn_decl) {
 
     for (size_t i = 0; i < proto_node->data.fn_proto.params.length; i += 1) {
         AstNode *param_node = proto_node->data.fn_proto.params.at(i);
-        const clang::ParmVarDecl *param = ((const clang::FunctionDecl*)fn_decl)->getParamDecl(i);
+        const ZigClangParmVarDecl *param = ZigClangFunctionDecl_getParamDecl(fn_decl, i);
         const char *name = ZigClangDecl_getName_bytes_begin((const ZigClangDecl *)param);
 
         Buf *proto_param_name;
@@ -4077,7 +4077,7 @@ static void visit_fn_decl(Context *c, const ZigClangFunctionDecl *fn_decl) {
         param_node->data.param_decl.name = scope_var->zig_name;
     }
 
-    if (!((const clang::FunctionDecl*)fn_decl)->hasBody()) {
+    if (!ZigClangFunctionDecl_hasBody(fn_decl)) {
         // just a prototype
         add_top_level_decl(c, proto_node->data.fn_proto.name, proto_node);
         return;
@@ -4085,7 +4085,7 @@ static void visit_fn_decl(Context *c, const ZigClangFunctionDecl *fn_decl) {
 
     // actual function definition with body
     c->ptr_params.clear();
-    const ZigClangStmt *body = bitcast(((const clang::FunctionDecl*)fn_decl)->getBody());
+    const ZigClangStmt *body = ZigClangFunctionDecl_getBody(fn_decl);
     AstNode *actual_body_node;
     TransScope *result_scope = trans_stmt(c, scope, body, &actual_body_node);
     if (result_scope == nullptr) {
diff --git a/src/zig_clang.cpp b/src/zig_clang.cpp
index b1457fd817..25e309a63e 100644
--- a/src/zig_clang.cpp
+++ b/src/zig_clang.cpp
@@ -1236,6 +1236,25 @@ static_assert((clang::CallingConv)ZigClangCallingConv_PreserveMost == clang::CC_
 static_assert((clang::CallingConv)ZigClangCallingConv_PreserveAll == clang::CC_PreserveAll, "");
 static_assert((clang::CallingConv)ZigClangCallingConv_AArch64VectorCall == clang::CC_AArch64VectorCall, "");
 
+void ZigClang_detect_enum_StorageClass(clang::StorageClass x) {
+    switch (x) {
+        case clang::SC_None:
+        case clang::SC_Extern:
+        case clang::SC_Static:
+        case clang::SC_PrivateExtern:
+        case clang::SC_Auto:
+        case clang::SC_Register:
+            break;
+    }
+}
+
+static_assert((clang::StorageClass)ZigClangStorageClass_None == clang::SC_None, "");
+static_assert((clang::StorageClass)ZigClangStorageClass_Extern == clang::SC_Extern, "");
+static_assert((clang::StorageClass)ZigClangStorageClass_Static == clang::SC_Static, "");
+static_assert((clang::StorageClass)ZigClangStorageClass_PrivateExtern == clang::SC_PrivateExtern, "");
+static_assert((clang::StorageClass)ZigClangStorageClass_Auto == clang::SC_Auto, "");
+static_assert((clang::StorageClass)ZigClangStorageClass_Register == clang::SC_Register, "");
+
 
 static_assert(sizeof(ZigClangSourceLocation) == sizeof(clang::SourceLocation), "");
 static ZigClangSourceLocation bitcast(clang::SourceLocation src) {
@@ -1434,6 +1453,30 @@ struct ZigClangSourceLocation ZigClangFunctionDecl_getLocation(const struct ZigC
     return bitcast(casted->getLocation());
 }
 
+bool ZigClangFunctionDecl_hasBody(const struct ZigClangFunctionDecl *self) {
+    auto casted = reinterpret_cast<const clang::FunctionDecl *>(self);
+    return casted->hasBody();
+}
+
+enum ZigClangStorageClass ZigClangFunctionDecl_getStorageClass(const struct ZigClangFunctionDecl *self) {
+    auto casted = reinterpret_cast<const clang::FunctionDecl *>(self);
+    return (ZigClangStorageClass)casted->getStorageClass();
+}
+
+const struct ZigClangParmVarDecl *ZigClangFunctionDecl_getParamDecl(const struct ZigClangFunctionDecl *self,
+        unsigned i)
+{
+    auto casted = reinterpret_cast<const clang::FunctionDecl *>(self);
+    const clang::ParmVarDecl *parm_var_decl = casted->getParamDecl(i);
+    return reinterpret_cast<const ZigClangParmVarDecl *>(parm_var_decl);
+}
+
+const struct ZigClangStmt *ZigClangFunctionDecl_getBody(const struct ZigClangFunctionDecl *self) {
+    auto casted = reinterpret_cast<const clang::FunctionDecl *>(self);
+    const clang::Stmt *stmt = casted->getBody();
+    return reinterpret_cast<const ZigClangStmt *>(stmt);
+}
+
 const ZigClangTypedefNameDecl *ZigClangTypedefType_getDecl(const ZigClangTypedefType *self) {
     auto casted = reinterpret_cast<const clang::TypedefType *>(self);
     const clang::TypedefNameDecl *name_decl = casted->getDecl();
diff --git a/src/zig_clang.h b/src/zig_clang.h
index 6a67ec85c1..8e0d2f9f98 100644
--- a/src/zig_clang.h
+++ b/src/zig_clang.h
@@ -88,7 +88,6 @@ struct ZigClangSkipFunctionBodiesScope;
 struct ZigClangSourceManager;
 struct ZigClangSourceRange;
 struct ZigClangStmt;
-struct ZigClangStorageClass;
 struct ZigClangStringLiteral;
 struct ZigClangStringRef;
 struct ZigClangSwitchStmt;
@@ -700,6 +699,18 @@ enum ZigClangCallingConv {
     ZigClangCallingConv_AArch64VectorCall, // __attribute__((aarch64_vector_pcs))
 };
 
+enum ZigClangStorageClass {
+    // These are legal on both functions and variables.
+    ZigClangStorageClass_None,
+    ZigClangStorageClass_Extern,
+    ZigClangStorageClass_Static,
+    ZigClangStorageClass_PrivateExtern,
+
+    // These are only legal on variables.
+    ZigClangStorageClass_Auto,
+    ZigClangStorageClass_Register,
+};
+
 ZIG_EXTERN_C struct ZigClangSourceLocation ZigClangSourceManager_getSpellingLoc(const struct ZigClangSourceManager *,
         struct ZigClangSourceLocation Loc);
 ZIG_EXTERN_C const char *ZigClangSourceManager_getFilename(const struct ZigClangSourceManager *,
@@ -742,6 +753,10 @@ ZIG_EXTERN_C struct ZigClangSourceLocation ZigClangDecl_getLocation(const struct
 
 ZIG_EXTERN_C struct ZigClangQualType ZigClangFunctionDecl_getType(const struct ZigClangFunctionDecl *);
 ZIG_EXTERN_C struct ZigClangSourceLocation ZigClangFunctionDecl_getLocation(const struct ZigClangFunctionDecl *);
+ZIG_EXTERN_C bool ZigClangFunctionDecl_hasBody(const struct ZigClangFunctionDecl *);
+ZIG_EXTERN_C enum ZigClangStorageClass ZigClangFunctionDecl_getStorageClass(const struct ZigClangFunctionDecl *);
+ZIG_EXTERN_C const struct ZigClangParmVarDecl *ZigClangFunctionDecl_getParamDecl(const struct ZigClangFunctionDecl *, unsigned i);
+ZIG_EXTERN_C const struct ZigClangStmt *ZigClangFunctionDecl_getBody(const struct ZigClangFunctionDecl *);
 
 ZIG_EXTERN_C bool ZigClangRecordDecl_isUnion(const struct ZigClangRecordDecl *record_decl);
 ZIG_EXTERN_C bool ZigClangRecordDecl_isStruct(const struct ZigClangRecordDecl *record_decl);