Cfg in rustc_session::config::cfg - Rust
Description: The parsed `--cfg` options that define the compilation environment of the crate, used to drive conditional compilation.

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## Cfg

# Type Alias Cfg

Source

    pub type Cfg = FxIndexSet<(Symbol, Option<Symbol>)>;

Expand description

The parsed `--cfg` options that define the compilation environment of the crate, used to drive conditional compilation.

An `FxIndexSet` is used to ensure deterministic ordering of error messages relating to `--cfg`.

## Aliased Type§

    pub struct Cfg { /* private fields */ }

## Layout§

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain `repr(...)` attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 56 bytes