Core: Factor + start defer

core_compiler_interface.hpp

@@ -334,6 +334,7 @@ enum Ast_Kind : uint32_t {
     AST_TYPE_OF,
     AST_VARGS_LAMBDA_PARAM,
 
+    AST_DEFER,
     AST_LABEL,
     AST_GOTO,
     AST_SWITCH,
@@ -535,6 +536,10 @@ struct Ast_Goto : Ast {
     Intern_String label;
 };
 
+struct Ast_Defer : Ast {
+    Ast_Scope *scope;
+};
+
 struct Ast_For : Ast {
     Ast_Expr *init;
     Ast_Expr *cond;
@@ -636,7 +641,7 @@ struct Ast_Decl : Ast {
     Array<Ast_Type *> polymorph_resolved_parameter_types;
     Array<Ast_Decl *> polymorph_parameters;
     Array<Ast_Decl *> polymorphs; // instantiated polymorphs
-    
+
     Ast_Scope *scope;
     Ast_Expr *typespec;
     union {