tldr/pages/common/eval.md

eval

Execute arguments as a single command in the current shell and return its result. More information: https://pubs.opengroup.org/onlinepubs/9699919799/utilities/V3_chap02.html#eval.

• Call echo with the "foo" argument:

eval "{{echo foo}}"

• Set a variable in the current shell:

eval "{{foo=bar}}"