df6e4a06e4
MSVC delays parsing of default arguments until instantiation. If the default argument is never used, it is never parsed. We don't model this. Instead, if lookup of a type name fails in a template argument context, we form a DependentNameType, which will be looked up at instantiation time. This fixes errors about 'CControlWinTraits' in atlwin.h. Reviewers: rsmith Differential Revision: http://reviews.llvm.org/D3995 llvm-svn: 210382
97 lines
2.8 KiB
C++
97 lines
2.8 KiB
C++
// RUN: %clang_cc1 -fms-compatibility -std=c++11 %s -verify
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// MSVC should compile this file without errors.
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namespace test_basic {
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template <typename T = Baz> // expected-warning {{using the undeclared type 'Baz' as a default template argument is a Microsoft extension}}
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struct Foo { T x; };
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typedef int Baz;
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template struct Foo<>;
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}
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namespace test_namespace {
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namespace nested {
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template <typename T = Baz> // expected-warning {{using the undeclared type 'Baz' as a default template argument is a Microsoft extension}}
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struct Foo {
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static_assert(sizeof(T) == 4, "should get int, not double");
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};
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typedef int Baz;
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}
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typedef double Baz;
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template struct nested::Foo<>;
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}
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namespace test_inner_class_template {
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struct Outer {
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template <typename T = Baz> // expected-warning {{using the undeclared type 'Baz' as a default template argument is a Microsoft extension}}
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struct Foo {
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static_assert(sizeof(T) == 4, "should get int, not double");
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};
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typedef int Baz;
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};
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typedef double Baz;
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template struct Outer::Foo<>;
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}
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namespace test_nontype_param {
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template <typename T> struct Bar { T x; };
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typedef int Qux;
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template <Bar<Qux> *P>
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struct Foo {
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};
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Bar<int> g;
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template struct Foo<&g>;
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}
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// MSVC accepts this, but Clang doesn't.
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namespace test_template_instantiation_arg {
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template <typename T> struct Bar { T x; };
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template <typename T = Bar<Weber>> // expected-error {{use of undeclared identifier 'Weber'}}
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struct Foo {
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static_assert(sizeof(T) == 4, "Bar should have gotten int");
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// FIXME: These diagnostics are bad.
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}; // expected-error {{expected ',' or '>' in template-parameter-list}}
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// expected-warning@-1 {{does not declare anything}}
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typedef int Weber;
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}
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#ifdef __clang__
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// These are negative test cases that MSVC doesn't compile either. Try to use
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// unique undeclared identifiers so typo correction doesn't find types declared
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// above.
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namespace test_undeclared_nontype_parm_type {
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template <Zargon N> // expected-error {{unknown type name 'Zargon'}}
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struct Foo { int x[N]; };
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typedef int Zargon;
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template struct Foo<4>;
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}
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namespace test_undeclared_nontype_parm_type_no_name {
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template <typename T, Asdf> // expected-error {{unknown type name 'Asdf'}}
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struct Foo { T x; };
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template struct Foo<int, 0>;
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}
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namespace test_undeclared_type_arg {
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template <typename T>
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struct Foo { T x; };
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template struct Foo<Yodel>; // expected-error {{use of undeclared identifier 'Yodel'}}
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}
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namespace test_undeclared_nontype_parm_arg {
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// Bury an undeclared type as a template argument to the type of a non-type
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// template parameter.
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template <typename T> struct Bar { T x; };
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template <Bar<Xylophone> *P> // expected-error {{use of undeclared identifier 'Xylophone'}}
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// expected-note@-1 {{template parameter is declared here}}
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struct Foo { };
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typedef int Xylophone;
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Bar<Xylophone> g;
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template struct Foo<&g>; // expected-error {{cannot be converted}}
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}
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#endif
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