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Improve error handling with assignments to bit_field using constants

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gingerBill
2024-02-22 18:47:43 +00:00
parent afcc2889ec
commit fd987b29ff
1 changed files with 35 additions and 13 deletions
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src/check_expr.cpp
+27 -5
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@@ -1886,15 +1886,36 @@ gb_internal bool check_representable_as_constant(CheckerContext *c, ExactValue i
BigInt i = v.value_integer; BigInt i = v.value_integer;
i64 bit_size = type_size_of(type); i64 byte_size = type_size_of(type);
BigInt umax = {}; BigInt umax = {};
BigInt imin = {}; BigInt imin = {};
BigInt imax = {}; BigInt imax = {};
if (bit_size < 16) { if (c->bit_field_bit_size > 0) {
big_int_from_u64(&umax, unsigned_integer_maxs[bit_size]); i64 bit_size = gb_min(cast(i64)(8*byte_size), cast(i64)c->bit_field_bit_size);
big_int_from_i64(&imin, signed_integer_mins[bit_size]);
big_int_from_i64(&imax, signed_integer_maxs[bit_size]); big_int_from_u64(&umax, 1);
big_int_from_i64(&imin, 1);
big_int_from_i64(&imax, 1);
BigInt bu = {};
BigInt bi = {};
big_int_from_i64(&bu, bit_size);
big_int_from_i64(&bi, bit_size-1);
big_int_shl_eq(&umax, &bu);
mp_decr(&umax);
big_int_shl_eq(&imin, &bi);
big_int_neg(&imin, &imin);
big_int_shl_eq(&imax, &bi);
mp_decr(&imax);
} else {
if (byte_size < 16) {
big_int_from_u64(&umax, unsigned_integer_maxs[byte_size]);
big_int_from_i64(&imin, signed_integer_mins[byte_size]);
big_int_from_i64(&imax, signed_integer_maxs[byte_size]);
} else { } else {
big_int_from_u64(&umax, 1); big_int_from_u64(&umax, 1);
big_int_from_i64(&imin, 1); big_int_from_i64(&imin, 1);
@@ -1914,6 +1935,7 @@ gb_internal bool check_representable_as_constant(CheckerContext *c, ExactValue i
big_int_shl_eq(&imax, &bi127); big_int_shl_eq(&imax, &bi127);
mp_decr(&imax); mp_decr(&imax);
} }
}
switch (type->Basic.kind) { switch (type->Basic.kind) {
case Basic_rune: case Basic_rune: