Module rustc_builtin_macros::cfg

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Expand description

The compiler code necessary to support the cfg! extension, which expands to a literal true or false based on whether the given cfg matches the current compilation environment.

Structs

OneCfgPattern 🔒
RequiresCfgPattern 🔒

Constants

_DERIVE_rustc_session_SessionDiagnostic_session_diagnostic_sess_G_FOR_OneCfgPattern 🔒
_DERIVE_rustc_session_SessionDiagnostic_session_diagnostic_sess_G_FOR_RequiresCfgPattern 🔒

Functions

expand_cfg
parse_cfg 🔒