Module sugg 

Contains utility functions to generate suggestions.

Re-exports

use crate::source::snippet; 🔒

use crate::source::snippet_opt; 🔒

use crate::source::snippet_with_applicability; 🔒

use crate::source::snippet_with_context; 🔒

use crate::ty::expr_sig; 🔒

use crate::get_parent_expr_for_hir; 🔒

use crate::higher; 🔒

use rustc_ast::util::parser::AssocOp; 🔒

use rustc_ast::UnOp; 🔒

use rustc_ast::ast; 🔒

use rustc_data_structures::fx::FxHashSet; 🔒

use rustc_errors::Applicability; 🔒

use rustc_hir as hir; 🔒

use rustc_hir::Closure; 🔒

use rustc_hir::ExprKind; 🔒

use rustc_hir::HirId; 🔒

use rustc_hir::MatchSource; 🔒

use rustc_hir::Node; 🔒

use rustc_hir::TyKind; 🔒

use rustc_hir_typeck::expr_use_visitor::Delegate; 🔒

use rustc_hir_typeck::expr_use_visitor::ExprUseVisitor; 🔒

use rustc_hir_typeck::expr_use_visitor::PlaceBase; 🔒

use rustc_hir_typeck::expr_use_visitor::PlaceWithHirId; 🔒

use rustc_lint::EarlyContext; 🔒

use rustc_lint::LateContext; 🔒

use rustc_lint::LintContext; 🔒

use rustc_middle::hir::place::ProjectionKind; 🔒

use rustc_middle::mir::FakeReadCause; 🔒

use rustc_middle::mir::Mutability; 🔒

use rustc_middle::ty; 🔒

use rustc_span::BytePos; 🔒

use rustc_span::CharPos; 🔒

use rustc_span::Pos as _; 🔒

use rustc_span::Span; 🔒

use rustc_span::SyntaxContext; 🔒

use std::borrow::Cow; 🔒

use std::fmt; 🔒

use std::fmt::Display; 🔒

use std::fmt::Write as _; 🔒

use std::ops::Add; 🔒

use std::ops::Neg; 🔒

use std::ops::Not; 🔒

use std::ops::Sub; 🔒

Macros

forward_binop_impls_to_ref 🔒

Copied from the rust standard library, and then edited

Structs

DerefClosure

Suggestion results for handling closure args dereferencing and borrowing

DerefDelegate 🔒

Visitor struct used for tracking down dereferencing and borrowing of closure’s args

ParenHelper 🔒

Helper type to display either foo or (foo).

Enums

Associativity 🔒

Operator associativity.

Sugg

A helper type to build suggestion correctly handling parentheses.

Constants

EMPTY

a constant represents an empty string, for convenience.

ONE

Literal constant 1, for convenience.

ZERO

Literal constant 0, for convenience.

Traits

DiagExt

Convenience extension trait for Diag.

Functions

associativity 🔒

Returns the associativity/fixity of an operator. The difference with AssocOp::fixity is that an operator can be both left and right associative (such as +: a + b + c == (a + b) + c == a + (b + c).

binop_to_string 🔒

Generates a string from the operator and both sides.

deref_closure_args

Build suggestion gradually by handling closure arg specific usages, such as explicit deref and borrowing cases. Returns None if no such use cases have been triggered in closure body

has_enclosing_paren

Returns true if sugg is enclosed in parenthesis.

indentation 🔒

Returns the indentation before span if there are nothing but [ \t] before it on its line.

make_assoc

Builds the string for <lhs> <op> <rhs> adding parenthesis when necessary.

make_binop

Convenience wrapper around make_assoc and AssocOp::Binary.

make_unop

Builds the string for <op><expr> adding parenthesis when necessary.

strip_enclosing_paren 🔒

Strip enclosing parentheses from a snippet if present.