@COUNTUNSAFEX — Attempts to expand an internal variable, function, or array element, and then returns the number of “dangerous” characters in the resulting string.

Syntax:
%@COUNTUNSAFEX[text]

text:the variable, function, or array element to expand

This function performs variable expansion on the variable, function, or array element named by text, and then counts the number of “dangerous” characters, as defined by the UNSAFE command, in the resulting string.

Note: Do not type a percent sign before the variable or function name. If you do, TCC’s parser will expand the argument before @COUNTUNSAFEX gets to see it.