Struct hir_def::body::BodySourceMap

pub struct BodySourceMap { /* private fields */ }

An item body together with the mapping from syntax nodes to HIR expression IDs. This is needed to go from e.g. a position in a file to the HIR expression containing it; but for type inference etc., we want to operate on a structure that is agnostic to the actual positions of expressions in the file, so that we don’t recompute types whenever some whitespace is typed.

One complication here is that, due to macro expansion, a single Body might be spread across several files. So, for each ExprId and PatId, we record both the HirFileId and the position inside the file. However, we only store AST -> ExprId mapping for non-macro files, as it is not clear how to handle this properly for macros.

Implementations

impl BodySourceMap

pub fn expr_or_pat_syntax( &self, id: ExprOrPatId, ) -> Result<ExprOrPatSource, SyntheticSyntax>

pub fn expr_syntax(&self, expr: ExprId) -> Result<ExprSource, SyntheticSyntax>

pub fn node_expr(&self, node: InFile<&Expr>) -> Option<ExprOrPatId>

pub fn node_macro_file(&self, node: InFile<&MacroCall>) -> Option<MacroFileId>

pub fn macro_calls( &self, ) -> impl Iterator<Item = (InFile<AstPtr<MacroCall>>, MacroFileId)> + '_

pub fn pat_syntax(&self, pat: PatId) -> Result<ExprOrPatSource, SyntheticSyntax>

pub fn self_param_syntax(&self) -> Option<InFile<AstPtr<SelfParam>>>

pub fn node_pat(&self, node: InFile<&Pat>) -> Option<PatId>

pub fn label_syntax(&self, label: LabelId) -> LabelSource

pub fn patterns_for_binding(&self, binding: BindingId) -> &[PatId]

pub fn node_label(&self, node: InFile<&Label>) -> Option<LabelId>

pub fn field_syntax(&self, expr: ExprId) -> FieldSource

pub fn pat_field_syntax(&self, pat: PatId) -> PatFieldSource

pub fn macro_expansion_expr( &self, node: InFile<&MacroExpr>, ) -> Option<ExprOrPatId>

pub fn expansions( &self, ) -> impl Iterator<Item = (&InFile<AstPtr<MacroCall>>, &MacroFileId)>

pub fn implicit_format_args( &self, node: InFile<&FormatArgsExpr>, ) -> Option<(HygieneId, &[(TextRange, Name)])>

pub fn asm_template_args( &self, node: InFile<&AsmExpr>, ) -> Option<(ExprId, &[Vec<(TextRange, usize)>])>

pub fn diagnostics(&self) -> &[BodyDiagnostic]

Get a reference to the body source map’s diagnostics.

Trait Implementations

impl Debug for BodySourceMap

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for BodySourceMap

fn default() -> BodySourceMap

Returns the “default value” for a type.

impl PartialEq for BodySourceMap

fn eq(&self, other: &BodySourceMap) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Eq for BodySourceMap

impl StructuralPartialEq for BodySourceMap