Macro macro_find_and_replace::replace_token

replace_token!() { /* proc-macro */ }

Replaces all occurences of a given single token with another single token.

Takes arguments in the order replace_token!{needle, replacement, code to search}. You may use any kind of brackets.

Panics

At compile time, if the arguments cannot be correctly parsed.

Examples

Replaces all plus signs with minus signs:

replace_token!{+, -,
    let x = (1 + 2) + 3;
}
assert_eq!(x, -4); 

Replaces the identifier MY_ARRAY with an array literal

replace_token!{MY_ARRAY, [8, 0],
    let x = MY_ARRAY;
}
assert_eq!(x, [8, 0]);