diff options
author | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
---|---|---|
committer | Carlo Zancanaro <carlo@pc-4w14-0.cs.usyd.edu.au> | 2012-10-15 17:10:06 +1100 |
commit | be1de4be954c80875ad4108e0a33e8e131b2f2c0 (patch) | |
tree | 1fbbecf276bf7c7bdcbb4dd446099d6d90eaa516 /clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp | |
parent | c4626a62754862d20b41e8a46a3574264ea80e6d (diff) | |
parent | f1bd2e48c5324d3f7cda4090c87f8a5b6f463ce2 (diff) |
Merge branch 'master' of ssh://bitbucket.org/czan/honours
Diffstat (limited to 'clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp')
-rw-r--r-- | clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp new file mode 100644 index 0000000..2412a14 --- /dev/null +++ b/clang/test/CXX/dcl.dcl/dcl.spec/dcl.constexpr/p9.cpp @@ -0,0 +1,37 @@ +// RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s + +// A constexpr specifier used in an object declaration declares the object as +// const. +constexpr int a = 0; +extern const int a; + +int i; // expected-note 2{{here}} +constexpr int *b = &i; +extern int *const b; + +constexpr int &c = i; +extern int &c; + +constexpr int (*d)(int) = 0; +extern int (*const d)(int); + +// A variable declaration which uses the constexpr specifier shall have an +// initializer and shall be initialized by a constant expression. +constexpr int ni1; // expected-error {{default initialization of an object of const type 'const int'}} +constexpr struct C { C(); } ni2; // expected-error {{cannot have non-literal type 'const struct C'}} expected-note 3{{has no constexpr constructors}} +constexpr double &ni3; // expected-error {{declaration of reference variable 'ni3' requires an initializer}} + +constexpr int nc1 = i; // expected-error {{constexpr variable 'nc1' must be initialized by a constant expression}} expected-note {{read of non-const variable 'i' is not allowed in a constant expression}} +constexpr C nc2 = C(); // expected-error {{cannot have non-literal type 'const C'}} +int &f(); // expected-note {{declared here}} +constexpr int &nc3 = f(); // expected-error {{constexpr variable 'nc3' must be initialized by a constant expression}} expected-note {{non-constexpr function 'f' cannot be used in a constant expression}} +constexpr int nc4(i); // expected-error {{constexpr variable 'nc4' must be initialized by a constant expression}} expected-note {{read of non-const variable 'i' is not allowed in a constant expression}} +constexpr C nc5((C())); // expected-error {{cannot have non-literal type 'const C'}} +int &f(); // expected-note {{here}} +constexpr int &nc6(f()); // expected-error {{constexpr variable 'nc6' must be initialized by a constant expression}} expected-note {{non-constexpr function 'f'}} + +struct pixel { + int x, y; +}; +constexpr pixel ur = { 1294, 1024 }; // ok +constexpr pixel origin; // expected-error {{default initialization of an object of const type 'const pixel' requires a user-provided default constructor}} |