Remove the semantics of `#no_copy`, keep the grammar

base/runtime/core.odin

@@ -115,7 +115,7 @@ Type_Info_Struct_Flags :: distinct bit_set[Type_Info_Struct_Flag; u8]
 Type_Info_Struct_Flag :: enum u8 {
 	packed    = 0,
 	raw_union = 1,
-	no_copy   = 2,
+	_         = 2,
 	align     = 3,
 }
 

src/check_decl.cpp

@@ -145,13 +145,6 @@ gb_internal void check_init_variables(CheckerContext *ctx, Entity **lhs, isize l
 		if (d != nullptr) {
 			d->init_expr = o->expr;
 		}
-
-		if (o->type && is_type_no_copy(o->type)) {
-			ERROR_BLOCK();
-			if (check_no_copy_assignment(*o, str_lit("initialization"))) {
-				error_line("\tInitialization of a #no_copy type must be either implicitly zero, a constant literal, or a return value from a call expression");
-			}
-		}
 	}
 	if (rhs_count > 0 && lhs_count != rhs_count) {
 		error(lhs[0]->token, "Assignment count mismatch '%td' = '%td'", lhs_count, rhs_count);

src/check_expr.cpp

@@ -5763,22 +5763,6 @@ gb_internal bool check_identifier_exists(Scope *s, Ast *node, bool nested = fals
 	return false;
 }
 
-gb_internal bool check_no_copy_assignment(Operand const &o, String const &context) {
-	if (o.type && is_type_no_copy(o.type)) {
-		Ast *expr = unparen_expr(o.expr);
-		if (expr && o.mode != Addressing_Constant && o.mode != Addressing_Type) {
-			if (expr->kind == Ast_CallExpr) {
-				// Okay
-			} else {
-				error(o.expr, "Invalid use of #no_copy value in %.*s", LIT(context));
-				return true;
-			}
-		}
-	}
-	return false;
-}
-
-
 gb_internal bool check_assignment_arguments(CheckerContext *ctx, Array<Operand> const &lhs, Array<Operand> *operands, Slice<Ast *> const &rhs) {
 	bool optional_ok = false;
 	isize tuple_index = 0;
@@ -5849,7 +5833,6 @@ gb_internal bool check_assignment_arguments(CheckerContext *ctx, Array<Operand>
 			for (Entity *e : tuple->variables) {
 				o.type = e->type;
 				array_add(operands, o);
-				check_no_copy_assignment(o, str_lit("assignment"));
 			}
 
 			tuple_index += tuple->variables.count;
@@ -6236,12 +6219,6 @@ gb_internal CallArgumentError check_call_arguments_internal(CheckerContext *c, A
 
 	}
 
-	for (Operand const &o : ordered_operands) {
-		if (o.mode != Addressing_Invalid) {
-			check_no_copy_assignment(o, str_lit("procedure call expression"));
-		}
-	}
-
 	for (isize i = 0; i < pt->param_count; i++) {
 		if (!visited[i]) {
 			Entity *e = pt->params->Tuple.variables[i];

src/check_stmt.cpp

@@ -430,8 +430,6 @@ gb_internal Type *check_assignment_variable(CheckerContext *ctx, Operand *lhs, O
 
 	Ast *node = unparen_expr(lhs->expr);
 
-	check_no_copy_assignment(*rhs, context_name);
-
 	// NOTE(bill): Ignore assignments to '_'
 	if (is_blank_ident(node)) {
 		check_assignment(ctx, rhs, nullptr, str_lit("assignment to '_' identifier"));

src/check_type.cpp

@@ -646,7 +646,6 @@ gb_internal void check_struct_type(CheckerContext *ctx, Type *struct_type, Ast *
 	struct_type->Struct.node       = node;
 	struct_type->Struct.scope      = ctx->scope;
 	struct_type->Struct.is_packed  = st->is_packed;
-	struct_type->Struct.is_no_copy = st->is_no_copy;
 	struct_type->Struct.polymorphic_params = check_record_polymorphic_params(
 		ctx, st->polymorphic_params,
 		&struct_type->Struct.is_polymorphic,

src/llvm_backend_type.cpp

@@ -797,7 +797,7 @@ gb_internal void lb_setup_type_info_data_giant_array(lbModule *m, i64 global_typ
 				u8 flags = 0;
 				if (t->Struct.is_packed)    flags |= 1<<0;
 				if (t->Struct.is_raw_union) flags |= 1<<1;
-				if (t->Struct.is_no_copy)   flags |= 1<<2;
+				//
 				if (t->Struct.custom_align) flags |= 1<<3;
 
 				vals[6] = lb_const_int(m, t_u8, flags).value;

src/name_canonicalization.cpp

@@ -687,7 +687,6 @@ gb_internal void write_type_to_canonical_string(TypeWriter *w, Type *type) {
 
 		if (type->Struct.is_packed)    type_writer_appendc(w, "#packed");
 		if (type->Struct.is_raw_union) type_writer_appendc(w, "#raw_union");
-		if (type->Struct.is_no_copy)   type_writer_appendc(w, "#no_copy");
 		if (type->Struct.custom_min_field_align != 0) type_writer_append_fmt(w, "#min_field_align(%lld)", cast(long long)type->Struct.custom_min_field_align);
 		if (type->Struct.custom_max_field_align != 0) type_writer_append_fmt(w, "#max_field_align(%lld)", cast(long long)type->Struct.custom_max_field_align);
 		if (type->Struct.custom_align != 0)           type_writer_append_fmt(w, "#align(%lld)",           cast(long long)type->Struct.custom_align);

src/types.cpp

@@ -155,7 +155,6 @@ struct TypeStruct {
 	bool            are_offsets_being_processed : 1;
 	bool            is_packed                   : 1;
 	bool            is_raw_union                : 1;
-	bool            is_no_copy                  : 1;
 	bool            is_poly_specialized         : 1;
 };
 
@@ -1780,10 +1779,6 @@ gb_internal bool is_type_raw_union(Type *t) {
 	t = base_type(t);
 	return (t->kind == Type_Struct && t->Struct.is_raw_union);
 }
-gb_internal bool is_type_no_copy(Type *t) {
-	t = base_type(t);
-	return (t->kind == Type_Struct && t->Struct.is_no_copy);
-}
 gb_internal bool is_type_enum(Type *t) {
 	t = base_type(t);
 	return (t->kind == Type_Enum);
@@ -2859,7 +2854,6 @@ gb_internal bool are_types_identical_internal(Type *x, Type *y, bool check_tuple
 
 	case Type_Struct:
 		if (x->Struct.is_raw_union == y->Struct.is_raw_union &&
-		    x->Struct.is_no_copy   == y->Struct.is_no_copy &&
 		    x->Struct.fields.count == y->Struct.fields.count &&
 		    x->Struct.is_packed    == y->Struct.is_packed &&
 		    x->Struct.soa_kind == y->Struct.soa_kind &&
@@ -4832,7 +4826,6 @@ gb_internal gbString write_type_to_string(gbString str, Type *type, bool shortha
 
 		if (type->Struct.is_packed)    str = gb_string_appendc(str, " #packed");
 		if (type->Struct.is_raw_union) str = gb_string_appendc(str, " #raw_union");
-		if (type->Struct.is_no_copy)   str = gb_string_appendc(str, " #no_copy");
 		if (type->Struct.custom_align != 0) str = gb_string_append_fmt(str, " #align %d", cast(int)type->Struct.custom_align);
 
 		str = gb_string_appendc(str, " {");