core.internal.dassert

string _d_assert_fail(A)(scope const string op, auto ref scope const A a);

Generates rich assert error messages for unary expressions

The unary expression assert(!una) will be turned into assert(!una, _d_assert_fail("!", una)). This routine simply acts as if the user wrote assert(una == false).

Parameters:

string op	Operator that was used in the expression, currently only "!" is supported.
A a	Result of the expression that was used in assert before its implicit conversion to bool.

Returns:

A string such as "a != true" or "a == true".

template _d_assert_fail(A...)

Generates rich assert error messages for binary expressions

The binary expression assert(x == y) will be turned into assert(x == y, _d_assert_fail!(typeof(x))("==", x, y)).

Parameters:

string comp	Comparison operator that was used in the expression.
A a	Left hand side operand (can be a tuple).
B b	Right hand side operand (can be a tuple).

Returns:

A string such as "$a $comp $b".