genEnum

OBSOLETE IN D2

Inserts a compile-time check that ensures a given type is a character type. (ie, char, wchar, or dchar)

Usage:

void funcForStringsOnly(T)(T[] str)
{
	//Note, the second param is optional
	mixin(ensureCharType!("T", "funcForStringsOnly"));
	//Do stuff
	return str;
}
funcForStringsOnly("hello"); // Ok
funcForStringsOnly([cast(int)1,2,3]); // Compile error

Turns Into:

{ static assert( is(T==char) || is(T==wchar) || is(T==dchar), "From 'funcForStringsOnly': 'T' must be char, wchar or dchar, not '"~T.stringof~"'" );`; //Do stuff return str; } funcForStringsOnly("hello"); // Ok funcForStringsOnly([cast(int)1,2,3]); // Compile error

Compiler Output:

Error: static assert "From 'funcForStringsOnly': 'T' must be char, wchar or dchar, not 'int'"