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lookup_env
rustc_
builtin_
macros
1.100.0-nightly
(6bb1652a0 2026-09-22)
In rustc_
builtin_
macros::
env
rustc_builtin_macros
::
env
Function
lookup_
env
Copy item path
Source
fn lookup_env(var:
Symbol
) ->
Result
<
Symbol
,
VarError
>