Macro builtin_char_transform 

macro_rules! builtin_char_transform {
    ($self:expr, $args:expr, $call_expr:expr, $from_low:expr, $from_high:expr, $from_base:expr, $to_base:expr) => { ... };
}

Macro for unary character transformation.

Extracts one character argument, applies ASCII transformation, and returns a char.

Example

builtin_char_transform!(self, args, call_expr, 'a', 'z', b'a', b'A') does uppercase.