gls_cpp_lang_support.h File Reference

Macros and helper code to determine what subset of C++11/14/17 is available. More...

Go to the source code of this file.

Classes
struct	is_convertible< T, U >
	Replacement for std::is_convertible, adapted from Loki 0.1.7. More...
struct	is_convertible< T, T >
struct	is_convertible< void, T >
struct	is_convertible< T, void >
struct	is_convertible< void, void >
struct	CompileTimeError< int >
struct	CompileTimeError< true >

Namespaces
	disti

Macros
#define	DISTI_STATIC_ASSERT(expr, msg)
	Poor man's version of C++11's static_assert() More...
#define	DISTI_STATIC_ASSERT_IS_CONVERTIBLE_TO(T, ConvertsTo)   DISTI_STATIC_ASSERT( (::disti::_cppLangSupportDetail::is_convertible<T*, ConvertsTo*>::value ), class_does_not_inherit_from_##ConvertsTo )

Detailed Description

Macros and helper code to determine what subset of C++11/14/17 is available.

Copyright Information

Copyright (c) 2016 The DiSTI Corporation.
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Macro Definition Documentation

#define DISTI_STATIC_ASSERT	(		expr,
			msg
	)

Value:

{                                                                                    \
                ::disti::_cppLangSupportDetail::CompileTimeError<( ( expr ) != 0 )> ERROR_##msg; \
                (void)ERROR_##msg;                                                               \
            }

Poor man's version of C++11's static_assert()

Parameters

expr	a compile-time integral or pointer expression
msg	a C identifier that will appear in compiler diagnostics

Note

For older compilers' benefit, msg should be a C identifier such as:

DISTI_STATIC_ASSERT( (std::is_convertible<T*,ConvertsTo*>::value), class_does_not_inherit_from_##ConvertsTo )

which shows a compile-time error that typically includes: "ERROR_class_does_not_inherit_from_Group". If it is not a C identifier, you may get spurious error messages at compile time compilers without static_assert.

Adapted from Loki 0.1.7.

#define DISTI_STATIC_ASSERT_IS_CONVERTIBLE_TO	(		T,
			ConvertsTo
	)		DISTI_STATIC_ASSERT( (::disti::_cppLangSupportDetail::is_convertible<T*, ConvertsTo*>::value ), class_does_not_inherit_from_##ConvertsTo )

Convenience macro to check that one type converts to another at compile-time.

Parameters

T	A class to check
ConvertsTo	A class to test T* against to verify that it can be converted to ConvertsTo* without a cast.

Note

This macro appears here for grouping with like code, but macros aren't scoped to namespace.