4.4 Evaluate strings

In T4, strings are processed repeatedly until no expansion is producible. When processing on a string is finished, it is marked as frozen, and to be output. If you want to expand frozen strings, you can use \eval:

\eval{string}

which launches different T4 processor and evaluate string. When expansion stops, it returns the result as a string.

On the other hand, if you don't want no more expansion, you can use \freeze:

\freeze{string}

which marks string frozen.