Struct SpanlessEq

pub struct SpanlessEq<'a, 'tcx> {
    cx: &'a LateContext<'tcx>,
    maybe_typeck_results: Option<(&'tcx TypeckResults<'tcx>, &'tcx TypeckResults<'tcx>)>,
    allow_side_effects: bool,
    expr_fallback: Option<Box<dyn FnMut(&Expr<'_>, &Expr<'_>) -> bool + 'a>>,
    path_check: PathCheck,
}

Type used to check whether two ast are the same. This is different from the operator == on ast types as this operator would compare true equality with ID and span.

Note that some expressions kinds are not considered but could be added.

Fields

cx: &'a LateContext<'tcx>

Context used to evaluate constant expressions.

maybe_typeck_results: Option<(&'tcx TypeckResults<'tcx>, &'tcx TypeckResults<'tcx>)>

allow_side_effects: bool

expr_fallback: Option<Box<dyn FnMut(&Expr<'_>, &Expr<'_>) -> bool + 'a>>

path_check: PathCheck

Implementations

impl<'a, 'tcx> SpanlessEq<'a, 'tcx>

pub fn new(cx: &'a LateContext<'tcx>) -> Self

pub fn deny_side_effects(self) -> Self

Consider expressions containing potential side effects as not equal.

pub fn paths_by_resolution(self) -> Self

Check paths by their resolution instead of exact equality. See PathCheck for more details.

pub fn expr_fallback( self, expr_fallback: impl FnMut(&Expr<'_>, &Expr<'_>) -> bool + 'a, ) -> Self

pub fn inter_expr(&mut self) -> HirEqInterExpr<'_, 'a, 'tcx>

Use this method to wrap comparisons that may involve inter-expression context. See self.locals.

pub fn eq_block(&mut self, left: &Block<'_>, right: &Block<'_>) -> bool

pub fn eq_expr(&mut self, left: &Expr<'_>, right: &Expr<'_>) -> bool

pub fn eq_path(&mut self, left: &Path<'_>, right: &Path<'_>) -> bool

pub fn eq_path_segment( &mut self, left: &PathSegment<'_>, right: &PathSegment<'_>, ) -> bool

pub fn eq_path_segments( &mut self, left: &[PathSegment<'_>], right: &[PathSegment<'_>], ) -> bool

pub fn eq_modifiers( left: TraitBoundModifiers, right: TraitBoundModifiers, ) -> bool

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: 48 bytes