assert.h File Reference

Static assertions. More...

This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Macros
#define	ML99_assert(expr)   ML99_call(ML99_assert, expr)
	The same as ML99_ASSERT but results in a Metalang99 term.
#define	ML99_assertEq(lhs, rhs)   ML99_call(ML99_assertEq, lhs, rhs)
	Like ML99_assert but compares lhs with rhs for equality (==).
#define	ML99_ASSERT(expr)   ML99_ASSERT_EQ(expr, ML99_true())
	Asserts ML99_EVAL(expr) at compile-time.
#define	ML99_ASSERT_EQ(lhs, rhs)   ML99_ASSERT_UNEVAL((ML99_EVAL(lhs)) == (ML99_EVAL(rhs)))
	Asserts ML99_EVAL(lhs) == ML99_EVAL(rhs) at compile-time.
#define	ML99_ASSERT_UNEVAL(expr)   ML99_PRIV_ASSERT_UNEVAL_INNER(expr)
	Asserts the C constant expression expr; static_assert in pure C99.
#define	ML99_ASSERT_EMPTY(expr)   ML99_ASSERT_EMPTY_UNEVAL(ML99_EVAL(expr))
	Asserts that ML99_EVAL(expr) is emptiness.
#define	ML99_ASSERT_EMPTY_UNEVAL(expr)    ML99_ASSERT_UNEVAL(ML99_PRIV_CAT(ML99_PRIV_ASSERT_EMPTY_, expr))
	Asserts that expr is emptiness.

Detailed Description

Static assertions.

For the sake of convenience, this header automatically includes metalang99/bool.h.

Note

[C99] Any of the following assertion macros must not appear on the same line number twice with itself as well as with any other Metalang99 assertion macro.

[C11] The following assertion macros expand to _Static_assert and, therefore, can be used on the same line twice.

Macro Definition Documentation

ML99_assert

#define ML99_assert

(

expr

)

ML99_call(ML99_assert, expr)

The same as ML99_ASSERT but results in a Metalang99 term.

It can be used inside other Metalang99-compliant macros, unlike ML99_ASSERT, which uses ML99_EVAL internally.

ML99_ASSERT

#define ML99_ASSERT

(

expr

)

ML99_ASSERT_EQ(expr, ML99_true())

Asserts ML99_EVAL(expr) at compile-time.

Examples

#include <metalang99/assert.h>
 
ML99_ASSERT(v(123 == 123));

ML99_ASSERT_EMPTY

#define ML99_ASSERT_EMPTY

(

expr

)

ML99_ASSERT_EMPTY_UNEVAL(ML99_EVAL(expr))

Asserts that ML99_EVAL(expr) is emptiness.

Examples

#include <metalang99/assert.h>
 
// Passes:
ML99_ASSERT_EMPTY(v());
 
// Fails:
ML99_ASSERT_EMPTY(v(123));

ML99_ASSERT_EMPTY_UNEVAL

#define ML99_ASSERT_EMPTY_UNEVAL

(

expr

)

ML99_ASSERT_UNEVAL(ML99_PRIV_CAT(ML99_PRIV_ASSERT_EMPTY_, expr))

Asserts that expr is emptiness.

Examples

#include <metalang99/assert.h>
 
// Passes:
ML99_ASSERT_EMPTY_UNEVAL();
 
// Fails:
ML99_ASSERT_EMPTY_UNEVAL(123);

ML99_ASSERT_EQ

#define ML99_ASSERT_EQ	(		lhs,
			rhs
	)		ML99_ASSERT_UNEVAL((ML99_EVAL(lhs)) == (ML99_EVAL(rhs)))

Asserts ML99_EVAL(lhs) == ML99_EVAL(rhs) at compile-time.

Examples

#include <metalang99/assert.h>
 
ML99_ASSERT_EQ(v(123), v(123));

ML99_ASSERT_UNEVAL

#define ML99_ASSERT_UNEVAL

(

expr

)

ML99_PRIV_ASSERT_UNEVAL_INNER(expr)

Asserts the C constant expression expr; static_assert in pure C99.

Examples

#include <metalang99/assert.h>
 
ML99_ASSERT_UNEVAL(123 == 123);