Function InterpolatedString.postfixType
'\0'/'c'/'w'/'d' for i"", i""c, i""w and i""d respectively.
inout char postfixType() pure nothrow @nogc scope @safe;
'\0'/'c'/'w'/'d' for i"", i""c, i""w and i""d respectively.
inout char postfixType() pure nothrow @nogc scope @safe;