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implement %% prefix operator

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See #23

also make undefined constants use llvm undef value
This commit is contained in:
Andrew Kelley
2016-01-25 15:45:05 -07:00
parent c0dc0ca6c9
commit deb3586884
9 changed files with 54 additions and 20 deletions
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20
src/codegen.cpp
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@@ -833,6 +833,24 @@ static LLVMValueRef gen_prefix_op_expr(CodeGen *g, AstNode *node) {
{
zig_panic("TODO codegen PrefixOpError");
}
case PrefixOpUnwrapError:
{
LLVMValueRef expr_val = gen_expr(g, expr_node);
TypeTableEntry *expr_type = get_expr_type(expr_node);
assert(expr_type->id == TypeTableEntryIdErrorUnion);
TypeTableEntry *child_type = expr_type->data.error.child_type;
// TODO in debug mode, put a panic here if the error is not 0
if (child_type->size_in_bits > 0) {
LLVMValueRef child_val_ptr = LLVMBuildStructGEP(g->builder, expr_val, 1, "");
if (handle_is_ptr(child_type)) {
return child_val_ptr;
} else {
return expr_val;
}
} else {
return nullptr;
}
}
}
zig_unreachable();
}
@@ -2219,7 +2237,7 @@ static LLVMValueRef gen_const_val(CodeGen *g, TypeTableEntry *type_entry, ConstE
assert(const_val->ok);
if (const_val->undef) {
return LLVMConstNull(type_entry->type_ref);
return LLVMGetUndef(type_entry->type_ref);
}
if (type_entry->id == TypeTableEntryIdInt) {