Restoring an environment variable

[Gintaras]

Macro TempEnvVar help

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;Auto-restores an environment variable. Or auto-deletes if did not exist.

;Example

TempEnvVar x.Var("TEST") ;;need just this single line

GetEnvVar("TEST" _s); out F"old: {_s}"
SetEnvVar("TEST" "new value")
GetEnvVar("TEST" _s); out F"new: {_s}"


;The TempEnvVar destructor restores or deletes the variable. It runs when the macro or function ends, even on exception.

[Davider]

Thank you very much for the sharing.