assert.h

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.

Note

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

Defines

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_assertEq(lhs, rhs)

Like ML99_assert but compares lhs with rhs for equality (==).

ML99_ASSERT(expr)

Asserts ML99_EVAL(expr) at compile-time.

Examples

#include <metalang99/assert.h>

ML99_ASSERT(v(123 == 123));

ML99_ASSERT_EQ(lhs, 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(expr)

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

Examples

#include <metalang99/assert.h>

ML99_ASSERT_UNEVAL(123 == 123);

ML99_ASSERT_EMPTY(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(expr)

Asserts that expr is emptiness.

Examples

#include <metalang99/assert.h>

// Passes:
ML99_ASSERT_EMPTY_UNEVAL();

// Fails:
ML99_ASSERT_EMPTY_UNEVAL(123);