Enum rustc_span::hygiene::ExpnKind [−][src]
pub enum ExpnKind {
Root,
Macro(MacroKind, Symbol),
AstPass(AstPass),
Desugaring(DesugaringKind),
Inlined,
}
Expand description
Expansion kind.
Variants
No expansion, aka root expansion. Only ExpnId::root()
has this kind.
Expansion produced by a macro.
AstPass(AstPass)
Transform done by the compiler on the AST.
Tuple Fields of AstPass
0: AstPass
Desugaring(DesugaringKind)
Desugaring done by the compiler during HIR lowering.
Tuple Fields of Desugaring
MIR inlining
Implementations
Trait Implementations
Auto Trait Implementations
impl RefUnwindSafe for ExpnKind
impl UnwindSafe for ExpnKind
Blanket Implementations
Mutably borrows from an owned value. Read more
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: 8 bytes
Size for each variant:
Root
: 0 bytesMacro
: 7 bytesAstPass
: 1 byteDesugaring
: 1 byteInlined
: 0 bytes