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using Foo :: enum {A, B, C}; len(Foo)

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This commit is contained in:
gingerBill
2018-07-29 10:50:15 +01:00
parent 49f2124df0
commit 6512a3e5f2
11 changed files with 60 additions and 73 deletions
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16
src/check_expr.cpp
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@@ -2788,6 +2788,7 @@ bool check_builtin_procedure(CheckerContext *c, Operand *operand, Ast *call, i32
case BuiltinProc_offset_of:
case BuiltinProc_type_info_of:
case BuiltinProc_typeid_of:
case BuiltinProc_len:
// NOTE(bill): The first arg may be a Type, this will be checked case by case
break;
default:
@@ -2860,9 +2861,17 @@ bool check_builtin_procedure(CheckerContext *c, Operand *operand, Ast *call, i32
}
case BuiltinProc_len:
case BuiltinProc_cap: {
check_expr_or_type(c, operand, ce->args[0]);
if (operand->mode == Addressing_Invalid) {
return false;
}
/* fallthrough */
case BuiltinProc_cap:
{
// len :: proc(Type) -> int
// cap :: proc(Type) -> int
Type *op_type = type_deref(operand->type);
Type *type = t_int;
AddressingMode mode = Addressing_Invalid;
@@ -2890,6 +2899,11 @@ bool check_builtin_procedure(CheckerContext *c, Operand *operand, Ast *call, i32
mode = Addressing_Value;
} else if (is_type_map(op_type)) {
mode = Addressing_Value;
} else if (operand->mode == Addressing_Type && is_type_enum(op_type) && id == BuiltinProc_len) {
Type *bt = base_type(op_type);
mode = Addressing_Constant;
value = exact_value_i64(bt->Enum.fields.count);
type = t_untyped_integer;
}
if (mode == Addressing_Invalid) {