Struct DedupHashEncoder 

pub(crate) struct DedupHashEncoder(pub(crate) StableHasher);

Hasher used to determine if two diagnostics are the same and should be deduplicated. Used by DiagCtxtInner::emitted_diagnostics. It’s a stable hash with one special behaviour: parents of spans within the diagnostics are ignored so that incremental and non-incremental compilation get the same behaviour.

Although this has nothing to do with encoding data to/from file, it is implemented on top of Encoder/SpanEncoder because they provide traversals of all the relevant types used within diagnostics. There is no corresponding decoder.

Tuple Fields

0: StableHasher

Trait Implementations

impl Encoder for DedupHashEncoder

fn emit_usize(&mut self, value: usize)

fn emit_u128(&mut self, value: u128)

fn emit_u64(&mut self, value: u64)

fn emit_u32(&mut self, value: u32)

fn emit_u16(&mut self, value: u16)

fn emit_u8(&mut self, value: u8)

fn emit_isize(&mut self, value: isize)

fn emit_i128(&mut self, value: i128)

fn emit_i64(&mut self, value: i64)

fn emit_i32(&mut self, value: i32)

fn emit_i16(&mut self, value: i16)

fn emit_raw_bytes(&mut self, value: &[u8])

fn emit_i8(&mut self, v: i8)

fn emit_bool(&mut self, v: bool)

fn emit_char(&mut self, v: char)

fn emit_str(&mut self, v: &str)

fn emit_byte_str(&mut self, v: &[u8])

impl SpanEncoder for DedupHashEncoder

fn encode_span(&mut self, span: Span)

fn encode_symbol(&mut self, value: Symbol)

fn encode_byte_symbol(&mut self, value: ByteSymbol)

fn encode_expn_id(&mut self, value: ExpnId)

fn encode_syntax_context(&mut self, value: SyntaxContext)

fn encode_crate_num(&mut self, value: CrateNum)

As a local identifier, a CrateNum is only meaningful within its context, e.g. within a tcx. Therefore, make sure to include the context when encode a CrateNum.

fn encode_def_index(&mut self, value: DefIndex)

fn encode_def_id(&mut self, value: DefId)

fn encode_local_def_id(&mut self, def_id: LocalDefId)

fn encode_def_key( &mut self, parent: Option<DefIndex>, disambiguated_data: impl Encodable<Self>, )

where Self: Sized,

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: 120 bytes