About multi character literals

I saw the C++14 standard file

'abcde'

If you put several chars between these small quotes, it's called multicharacter literal and int type. By the way, it has implementation-defined value. It means that each compiler has a different value.

test appears as 1952805748, which seems to work only with certain compilers.

I don't know why you created such a function, but I think it's better not to use a function that can have different values for each compiler.

IBM Knowledge Center - Character Literals has this description.

A character literal contains a sequence of characters or escape sequences enclosed in single quotation mark symbols, for example 'c'. A character literal may be prefixed with the letter L, for example L'c'. A character literal without the L prefix is an ordinary character literal or a narrow character literal. A character literal with the L prefix is a wide character literal. An ordinary character literal that contains more than one character or escape sequence (excluding single quotes ('), backslashes () or new-line characters) is a multicharacter literal.

C++A character literal that contains only one character has type char, which is an integral type. A multicharacter literal has type int.

In short, character literal is a sequence of characters or escapes enclosed in single quotes. In C++, character literature is char type, and multicharacter literature is int type.