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Merge pull request #4590 from xackus/fix-4587 

fix failed assert on generic fn opaque return type
master
Andrew Kelley 2020-03-09 22:10:57 -04:00 committed by GitHub
parent 1f44b29724 e7cc456421
commit 675f01f176
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 68 additions and 24 deletions
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34
src/analyze.cpp
View File

@ -1962,31 +1962,16 @@ static ZigType *analyze_fn_type(CodeGen *g, AstNode *proto_node, Scope *child_sc
return g->builtin_types.entry_invalid;
}
switch (specified_return_type->id) {
case ZigTypeIdInvalid:
zig_unreachable();
case ZigTypeIdUndefined:
case ZigTypeIdNull:
add_node_error(g, fn_proto->return_type,
buf_sprintf("return type '%s' not allowed", buf_ptr(&specified_return_type->name)));
return g->builtin_types.entry_invalid;
case ZigTypeIdOpaque:
{
if(!is_valid_return_type(specified_return_type)){
ErrorMsg* msg = add_node_error(g, fn_proto->return_type,
buf_sprintf("opaque return type '%s' not allowed", buf_ptr(&specified_return_type->name)));
buf_sprintf("%s return type '%s' not allowed", type_id_name(specified_return_type->id), buf_ptr(&specified_return_type->name)));
Tld *tld = find_decl(g, &fn_entry->fndef_scope->base, &specified_return_type->name);
if (tld != nullptr) {
add_error_note(g, msg, tld->source_node, buf_sprintf("declared here"));
add_error_note(g, msg, tld->source_node, buf_sprintf("type declared here"));
}
return g->builtin_types.entry_invalid;
}
default:
break;
}
if (fn_proto->auto_err_set) {
ZigType *inferred_err_set_type = get_auto_err_set_type(g, fn_entry);
if ((err = type_resolve(g, specified_return_type, ResolveStatusSizeKnown)))
@ -2056,6 +2041,19 @@ static ZigType *analyze_fn_type(CodeGen *g, AstNode *proto_node, Scope *child_sc
return get_fn_type(g, &fn_type_id);
}
bool is_valid_return_type(ZigType* type) {
switch (type->id) {
case ZigTypeIdInvalid:
case ZigTypeIdUndefined:
case ZigTypeIdNull:
case ZigTypeIdOpaque:
return false;
default:
return true;
}
zig_unreachable();
}
bool type_is_invalid(ZigType *type_entry) {
switch (type_entry->id) {
case ZigTypeIdInvalid:

1
src/analyze.hpp
View File

@ -267,6 +267,7 @@ ZigValue *analyze_const_value(CodeGen *g, Scope *scope, AstNode *node, ZigType *
void resolve_llvm_types_fn(CodeGen *g, ZigFn *fn);
bool fn_is_async(ZigFn *fn);
CallingConvention cc_from_fn_proto(AstNodeFnProto *fn_proto);
bool is_valid_return_type(ZigType* type);
Error type_val_resolve_abi_align(CodeGen *g, AstNode *source_node, ZigValue *type_val, uint32_t *abi_align);
Error type_val_resolve_abi_size(CodeGen *g, AstNode *source_node, ZigValue *type_val,

13
src/ir.cpp
View File

@ -19392,6 +19392,19 @@ static IrInstGen *ir_analyze_fn_call(IrAnalyze *ira, IrInst* source_instr,
ZigType *specified_return_type = ir_analyze_type_expr(ira, impl_fn->child_scope, return_type_node);
if (type_is_invalid(specified_return_type))
return ira->codegen->invalid_inst_gen;
if(!is_valid_return_type(specified_return_type)){
ErrorMsg *msg = ir_add_error(ira, source_instr,
buf_sprintf("call to generic function with %s return type '%s' not allowed", type_id_name(specified_return_type->id), buf_ptr(&specified_return_type->name)));
add_error_note(ira->codegen, msg, fn_proto_node, buf_sprintf("function declared here"));
Tld *tld = find_decl(ira->codegen, &fn_entry->fndef_scope->base, &specified_return_type->name);
if (tld != nullptr) {
add_error_note(ira->codegen, msg, tld->source_node, buf_sprintf("type declared here"));
}
return ira->codegen->invalid_inst_gen;
}
if (fn_proto_node->data.fn_proto.auto_err_set) {
ZigType *inferred_err_set_type = get_auto_err_set_type(ira->codegen, impl_fn);
if ((err = type_resolve(ira->codegen, specified_return_type, ResolveStatusSizeKnown)))

36
test/compile_errors.zig
View File

@ -6558,9 +6558,41 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
\\export fn bar() !FooType {
\\ return error.InvalidValue;
\\}
\\export fn bav() !@TypeOf(null) {
\\ return error.InvalidValue;
\\}
\\export fn baz() !@TypeOf(undefined) {
\\ return error.InvalidValue;
\\}
, &[_][]const u8{
"tmp.zig:2:18: error: opaque return type 'FooType' not allowed",
"tmp.zig:1:1: note: declared here",
"tmp.zig:2:18: error: Opaque return type 'FooType' not allowed",
"tmp.zig:1:1: note: type declared here",
"tmp.zig:5:18: error: Null return type '(null)' not allowed",
"tmp.zig:8:18: error: Undefined return type '(undefined)' not allowed",
});
cases.add("generic function returning opaque type",
\\const FooType = @OpaqueType();
\\fn generic(comptime T: type) !T {
\\ return undefined;
\\}
\\export fn bar() void {
\\ _ = generic(FooType);
\\}
\\export fn bav() void {
\\ _ = generic(@TypeOf(null));
\\}
\\export fn baz() void {
\\ _ = generic(@TypeOf(undefined));
\\}
, &[_][]const u8{
"tmp.zig:6:16: error: call to generic function with Opaque return type 'FooType' not allowed",
"tmp.zig:2:1: note: function declared here",
"tmp.zig:1:1: note: type declared here",
"tmp.zig:9:16: error: call to generic function with Null return type '(null)' not allowed",
"tmp.zig:2:1: note: function declared here",
"tmp.zig:12:16: error: call to generic function with Undefined return type '(undefined)' not allowed",
"tmp.zig:2:1: note: function declared here",
});
cases.add( // fixed bug #2032