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Merge pull request #1167 from ziglang/comptime-array-by-value

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Implement const_values_equal for arrays
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Jimmi Holst Christensen 2018-06-30 18:58:31 +02:00 committed by GitHub
commit 42033ea3ca
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2 changed files with 24 additions and 2 deletions
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18
src/analyze.cpp
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@ -5471,8 +5471,22 @@ bool const_values_equal(ConstExprValue *a, ConstExprValue *b) {
case TypeTableEntryIdPointer:
case TypeTableEntryIdFn:
return const_values_equal_ptr(a, b);
case TypeTableEntryIdArray:
zig_panic("TODO");
case TypeTableEntryIdArray: {
assert(a->type->data.array.len == b->type->data.array.len);
assert(a->data.x_array.special != ConstArraySpecialUndef);
assert(b->data.x_array.special != ConstArraySpecialUndef);
size_t len = a->type->data.array.len;
ConstExprValue *a_elems = a->data.x_array.s_none.elements;
ConstExprValue *b_elems = b->data.x_array.s_none.elements;
for (size_t i = 0; i < len; ++i) {
if (!const_values_equal(&a_elems[i], &b_elems[i]))
return false;
}
return true;
}
case TypeTableEntryIdStruct:
for (size_t i = 0; i < a->type->data.structure.src_field_count; i += 1) {
ConstExprValue *field_a = &a->data.x_struct.fields[i];

8
test/cases/array.zig
View File

@ -152,3 +152,11 @@ fn testImplicitCastSingleItemPtr() void {
slice[0] += 1;
assert(byte == 101);
}
fn testArrayByValAtComptime(b: [2]u8) u8 { return b[0]; }
test "comptime evalutating function that takes array by value" {
const arr = []u8{0,1};
_ = comptime testArrayByValAtComptime(arr);
_ = comptime testArrayByValAtComptime(arr);
}