Minimize Ast flags usage

src/checker.cpp

@@ -3012,8 +3012,8 @@ void check_builtin_attributes(CheckerContext *ctx, Entity *e, Array<Ast *> *attr
 }
 
 void check_collect_value_decl(CheckerContext *c, Ast *decl) {
-	if (decl->been_handled) return;
-	decl->been_handled = true;
+	if (decl->state_flags & StateFlag_BeenHandled) return;
+	decl->state_flags |= StateFlag_BeenHandled;
 
 	ast_node(vd, ValueDecl, decl);
 
@@ -3231,8 +3231,8 @@ void check_collect_value_decl(CheckerContext *c, Ast *decl) {
 }
 
 void check_add_foreign_block_decl(CheckerContext *ctx, Ast *decl) {
-	if (decl->been_handled) return;
-	decl->been_handled = true;
+	if (decl->state_flags & StateFlag_BeenHandled) return;
+	decl->state_flags |= StateFlag_BeenHandled;
 
 	ast_node(fb, ForeignBlockDecl, decl);
 	Ast *foreign_library = fb->foreign_library;
@@ -3616,8 +3616,8 @@ Array<ImportPathItem> find_import_path(Checker *c, AstPackage *start, AstPackage
 }
 #endif
 void check_add_import_decl(CheckerContext *ctx, Ast *decl) {
-	if (decl->been_handled) return;
-	decl->been_handled = true;
+	if (decl->state_flags & StateFlag_BeenHandled) return;
+	decl->state_flags |= StateFlag_BeenHandled;
 
 	ast_node(id, ImportDecl, decl);
 	Token token = id->relpath;
@@ -3731,8 +3731,8 @@ DECL_ATTRIBUTE_PROC(foreign_import_decl_attribute) {
 }
 
 void check_add_foreign_import_decl(CheckerContext *ctx, Ast *decl) {
-	if (decl->been_handled) return;
-	decl->been_handled = true;
+	if (decl->state_flags & StateFlag_BeenHandled) return;
+	decl->state_flags |= StateFlag_BeenHandled;
 
 	ast_node(fl, ForeignImportDecl, decl);
 

src/parser.hpp

@@ -217,14 +217,16 @@ enum ProcCallingConvention {
 	ProcCC_ForeignBlockDefault = -1,
 };
 
-enum StateFlag {
+enum StateFlag : u16 {
 	StateFlag_bounds_check    = 1<<0,
 	StateFlag_no_bounds_check = 1<<1,
 
 	StateFlag_no_deferred = 1<<5,
+
+	StateFlag_BeenHandled = 1<<15,
 };
 
-enum ViralStateFlag {
+enum ViralStateFlag : u16 {
 	ViralStateFlag_ContainsDeferredProcedure = 1<<0,
 };
 
@@ -638,9 +640,8 @@ isize const ast_variant_sizes[] = {
 
 struct AstCommonStuff {
 	AstKind      kind;
-	u32          state_flags;
-	u32          viral_state_flags;
-	bool         been_handled;
+	u16          state_flags;
+	u16          viral_state_flags;
 	AstFile *    file;
 	Scope *      scope;
 	TypeAndValue tav;
@@ -648,9 +649,8 @@ struct AstCommonStuff {
 
 struct Ast {
 	AstKind      kind;
-	u32          state_flags;
-	u32          viral_state_flags;
-	bool         been_handled;
+	u16          state_flags;
+	u16          viral_state_flags;
 	AstFile *    file;
 	Scope *      scope;
 	TypeAndValue tav;