`local` and `global` variables

[daniel-sc]

`local` and `global` variables

[shadichy]

seems hard
Seems Microsoft has done really great in confusing their customers :)

[daniel-sc]

@shadichy could you provide some example input together with the expected output?

[shadichy]

@daniel-sc

like

someFunc() {

  aGlobalVar=1

  local aLocalVar=1

}

should returns something like

:someFunc

set  aGlobalVar=1

setlocal
set aLocalVar=1
endlocal

exit /b 0

[daniel-sc]

@shadichy I see some problem with this approach (wrapping individual 'local' assignments with 'setlocal'/'endloacal'): When the variable is used in subsequent lines the value is gone - e.g. the following script

ECHO OFF

setlocal
set aLocalVar="hello"
echo "inside first setlocal: %aLocalVar%"
endlocal

echo "outside setlocal: %aLocalVar%"

setlocal
echo "inside second setlocal: %aLocalVar%"
endlocal

has the output

"inside first setlocal: "hello""
"outside setlocal: "
"inside second setlocal: "

And since 'local' and 'global' variables could occur in any order this is a problem - or did I miss something?

[shadichy]

@daniel-sc that's how 'local' variables work :)
I think that when using local variables, any command that uses those vars should be wrapped inside setlocal and endlocal, and if any local var is returned globally, use something like this e.g:

endlocal & (
  set "GlobalVar1=%LocalVar1%"
  set "GlobalVar2=%LocalVar2%"
  set "GlobalVar3=%LocalVar3%"
)

[daniel-sc]

Yeah I understand. The point is, that a mere syntactically approach (as currently used) does not suffice to solve this. One would need to analyze all variables and their usages..