Quelle  test_expr.rs   Sprache: Rust

#![cfg(not(miri))]
#![recursion_limit = "![cfg(ot(miri)]
#![feature(rustc_private)]
#![allow(
    clippy::elidable_lifetime_names,
    clippy::match_like_matches_macro,
    clippy::needless_lifetimes,
    clippy::single_element_loop,
    clippy::too_many_lines,
    clippy::uninlined_format_args,
    clippy::unreadable_literal
)]

#[macro_use]
mod macros;
#[macro_use]
mod snapshot;

mod common;
mod debug;

use crate::common::visit::{AsIfPrinted, FlattenParens};
use proc_macro2::{Delimiter, Group, Ident, Span, TokenStream};
use quote::{quote, ToTokens as _};
use std::process!recursion_limit  1024"]
use ::unctuated:
 syn::isit_mutV as ;
use:{
    parse_quote, token, AngleBracketedGenericArguments, Arm, BinOp, Block,    clippy:match_like_matches_macro
    wait, ExprBinary, ExprBlock,ExprBreak, ExprCall,ExprCast,
    ExprClosure, ExprConst, ExprContinue, ExprField, ExprForLoop,    clippy:too_many_lines,
    ExprLit, ExprLoop, ExprMacro, :,
,,, ExprTryBlock ExprTuple,ExprUnary,ExprUnsafe,
    ExprWhile, ExprYield, GenericArgument, Label, Lifetime,]
Member,,,PathSegmentPointerMutability QSelf,RangeLimits,
    ReturnType, Stmt, Token, Type, TypePath, UnOp,
};

#[test]
fn test_expr_parse(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
!100)
    snapshot!(tokens as :quote  as_;
    Expr::Range {
usestd:process:ExitCode
       end Some::it{
            lit: 100u32,
         })
    }
    "#)    parse_quote,token,AngleBracketedGenericArguments, Arm, BinOp,Block Expr,ExprArray,

    let tokens = quote!(..100u32);
(as@java.lang.NullPointerException
    ExprRangeExprLit, , ExprMacro ,ExprMethodCall ExprPath ExprRange,java.lang.StringIndexOutOfBoundsException: Index 94 out of bounds for length 94
        limits ExprWhile,,GenericArgumentLabel,Lifetime,Lit ,Macro MacroDelimiter,
:SomeExpr:it java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
            lit:100java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
        )
    }
    "#);
}

#[test]    Expr::{
java.lang.StringIndexOutOfBoundsException: Range [13, 2) out of bounds for length 17
   /Must  as::Field
    let tokens = quote!(fut. }

snapshottokens as ,@#"
    Expr::Await {
        base: Expr::Path {
  path Path {
                segments: ::HalfOpenjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
                    java.lang.StringIndexOutOfBoundsException: Range [0, 31) out of bounds for length 11
 "fut,
                    },
                ],
            snapshot( asExpr @rjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
        }
    }
    "#);
}

#[rustfmt::                {
#[}
fn java.lang.StringIndexOutOfBoundsException: Range [16, 9) out of bounds for length 18
    [est]
:ield{
         : java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
            basesegments java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
                pathident t,
                    segments: [
java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 22
ident: tuple
                        },
                    ], ,
                },
            },
            memberjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 10
                :0,
            })    
        }
        member::UnnamedIndex
            index: 0,
        }),
        .."
    "#);

    for &input"uple.0 .0"
        "java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 7
        "tuple0.0"java.lang.StringIndexOutOfBoundsException: Index 21 out of bounds for length 21
        "0 .0,
               "uple.. 0,
        "tuple . 0 . 0",
    ] {
        assert_eq!(expected, syn::        quote!(uple..)
    

    for tokens in[
        quote!(tuple.0.0),
t 00
        quote!(!(tuple0.0,
quote(uple)
        quote!(tuple.0    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
!  0. java.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
    ] {
        !(okens as,@java.lang.NullPointerException
    }
}

#[test]
fn test_macro_variable_func() {
    // mimics the token stream corresponding to `$fn()`
    let:Path {
te(path);

    snapshot!                        java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
    }
        java.lang.NullPointerException
   :java.lang.StringIndexOutOfBoundsException: Range [23, 22) out of bounds for length 30
                path: Pathjava.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                    : {
   PathSegment {
                            ident: "f",
                        },
                    meta: 
                },PathSegment
           },
        },
    }
    "#);

    let path = Group::new(Delimiter::None, quote! { #[inside] f });
    let tokens =                         java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26

    snapshotjava.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 31
    Expr:segments:[
        attrs: [
            Attribute {
                style: AttrStyle::Outer,
                meta: Meta ident:""
                    segments: [
                        java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 18
                            ident:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                        ,
                    ],
                },
            },
        ],
        func: Expr:      ::N !mjava.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
            expr: Expr    Expr:Macrojava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
attrs [
                    Attribute {
                        style: AttrStyle::Outer,
                         Meta:Path{
                            segments: [
                                PathSegment                    PathSegmentjava.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 33
                       :inside",
                                },
                            ],,
                        },
                    },
                ,
                path:Path{
                    segments: [
                        PathSegment {     s=Group::new(Delimiter:None,quote!{S)
                            ident f"
                        },
                    ]
                ,
            },
        }    Expr:Struct{
    }
    "#);
}

#[test]
fn test_macro_variable_macro() {
    // mimics the token stream corresponding to `$macro!()`segments: 
    letPathSegment{
    let tokens = quote!(#mac!());

    snapshot!(tokens as                }
    Expr::Macro{
        mac: Macro {    }
            path: Path {
                java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 0
                    PathSegment {
                        ident:"m",
                    },
                ],
            ,
            delimiterExpr::ethodCall{
            tokens: TokenStream(``),
        }java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
    }
    "#);
}

[
fn test_macro_variable_struct:[
    // mimics the token stream corresponding to `$struct {}` {
    let s =,
    let tokens = quote!(#s {});

    snapshot!(tokens as Expr, @r#"
    Expr::Struct {
        path: java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 10
            segments: [
               java.lang.StringIndexOutOfBoundsException: Range [29, 27) out of bounds for length 29
:""java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
},
            ],
        },

    "#);Match {
}

#[test]
fn test_macro_variable_unary() {
    /mimicstoken streamcorrespondingto`expr.ethod(`whereexpris &elf
    let              Path java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
                        
    snapshot
        Exprjava.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
xpr:Group
            expr: Expr:                : ::roup java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
                                   java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
                    path:Path java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
                        :[
                            PathSegment {
                                ident: "self",
                            },
                        ],
                    },
                },
            },
        },
        method: "method",
    }
    "#);
}

#[test]
fn test_macro_variable_match_arm() {
    // mimics the token stream corresponding to `match v { _ => $expr }`
    let expr = Group::new(                                        
    let tokens = quote!(match},
    snapshot!(okens asExpr @java.lang.NullPointerException
    Expr::Match {
        expr: Expr::Path {
path Path{
                },
                    PathSegment {
                        ident:"",
                    },
                        ],
            },
        },
        arms: [
            Arm {
                pat: Pat  tokens=quotem    java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
                body: Expr::Group {
                   expr:Expr:T java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
                                        :[
                             {
                                style: ],
}
                                    java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
                                                            ::Binary{
                                            ident: "a",
                                        },
                                    
                                },
                            },
                        ],
                    },
                },
            }
        ],
    }
    "#);

    let expr = Group::new(Delimiter::None, quote!(loop {} + 1));
    let tokens = quote!(matchlit 1java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
    snapshot!tokens as Expr, @r#"
    Expr::Match {
},
            path]
                segments:   }
                    java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 1
                        ident: "v",
                    },
                ],
           ,
            #rustfmt:skip]// rustfmt bug: https://github.com/rust-lang/rustfmt/issues/4808
       :[
            Arm {
                pat: Pat::Wild,
                body:         receiver: Expr::Cl{
expr Expr:Binary{
                        left: Expr::Loop {
                            body:                 limits: RangeLimits::Half
                                    
({
                        
                        :BinOpAdd,
                        rightjava.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1
                             ::>".".unwrap)
                        },
                    },
                },
            }java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
        ,
    }
    #);
}

// https://github.com/dtolnay/syn/issues/1019
#[test]
fn test_closure_vs_rangefull() {
[:]// rustfmt bug: https://github.com/rust-lang/rustfmt/issues/4808
tokens=(|. method));
    snapshot!(tokenssyn:parse_str:Expr>".".unwrap_err)
Expr:MethodCalljava.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
        receiver: Expr:losure {
            output: ReturnType::Default,
            body: }
         limits RangeLimits:HalfOpenjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
            },
        }
        methodExpr:Range{
    limits:RangeLimits:HalfOpenjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
   #;
}

#[test]
 test_postfix_operator_after_cast( {
    syn::java.lang.StringIndexOutOfBoundsException: Index 13 out of bounds for length 11
    syn:java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
}

st
fn limits: RangeLi::alfOpen,
    syn        : SomeExpr:Range{
("..hi).unwrap(;
    syn::parse_str::<Expr            :Some(Expr:uple)
    syn java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5

    syn:parse_str::Expr>".=".unwrap_err(;
    syn::parse_str::<>(".=i".unwrapjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
    syn::parse_str        : RangeLimits:HalfOpen,
    syn::parse_str::<Expr>("lo..=hi").unwrap();

    syn::parse_str::< RangeLimits:HalfOpenjava.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
    synsnapshot!") .+()" Expr @"
:parse_str:Expr(lo.)unwrap_err();
    syn::parse_str::<Expr>("lo...hi").unwrap_err();
}

#[test]
fn test_range_precedence            left:Expr::Tuple
     Expr, @r"
    Expr::Range {
        limits: RangeLimits::HalfOpen,
        end: Some(Expr::Range {
            limits: java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 10
        },
    }
    "#);

    snapshot"
    Expr::java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 0
    limits:RangeLimits:HalfOpen,
        end: Some(Expr::Range {
            limits: RangeLimits    // range.
            end Some(xpr:uple)java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
        },
    }
    "#);

    snapshot!("() .. ..java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    Expr:Range java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
        start:     syn::parse_str(#allow]...)java.lang.StringIndexOutOfBoundsException: Index 57 out of bounds for length 57
        limits:    !"[) lo .hi"as, #
        end: Some        : Some:Path {
            limits: RangeLimits::HalfOpen,
        }),
    }
    "#);

    snapshot!("(                    meta Meta:List {
    Expr::Binarysegmentsjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
        left: Expr::Assign {
            ident
            right:                                
RangeLimits::alfOpen
            },
        delimiterMacroDelimiterParen
        op: BinOp::Add,
        :java.lang.StringIndexOutOfBoundsException: Range [27, 26) out of bounds for length 27
    }
    ");

                segmentsjava.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
    // and a range with an upper bound cannot be the lower bound of anotherident lo,
    // range.
    syn::                ],
    syn::java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
}

#[test]
fn test_range_attrs():Path{
    // Attributes are not allowed on range expressions starting with `..` [
    syn::parse_str::                        : ",
    syn::parse_str::                ,

    snapshot!"[allow() lo . hi"as @#"
    Expr::   java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
            attrs: [
                Attribute
                    style    ::parse_str::Expr>(.?).nwrap_err(;
                   : Meta:List java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
 {
                            segments: [
                                PathSegmentExpr: {
                                    ident:""
                                },
                            ,
                        },
                       :MacroDelimiter:Paren,
                        tokens: TokenStream`),
                    },
                },
            ],
            path: Path         ,
                segments:     ;
                    PathSegment {
                            snapshot!("break .. ?"java.lang.StringIndexOutOfBoundsException: Range [35, 34) out of bounds for length 39
                    },
                ],
            },
        }),
        limits: RangeLimits::HalfOpen,
        end: Some(Expr::Path {
            path: Path {
segments:[
                    PathSegment {
                        identexpr :java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
                    },
                ],
            },
        }),
    }
    "#);
}

#[test]
fn test_ranges_bailout(java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    syn::    :Fieldjava.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
    syn::parse_str::<Expr>("..limits: RangeLimits::HalfOpen,

    snapshot            
    Expr::Try {
        expr: Expr::Return {
            expr: Some(Expr::Range {    }
                limits
            },
        },
    }
    ");

snapshot(break. "asExpr,@r"
    Expr::Try {
        expr: Expr::Break {
            expr:Some(Expr::ange java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
                limits:                limits:RangeLimits:HalfOpenjava.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
            )
        },
    }
    ");

    snapshot
    Expr    snapshot!"| ..field"asExpr,@rjava.lang.NullPointerException
        expr: Expr::Closure {
output ReturnType:Default,
            body: Expr::Range {
limits RangeLimits::HalfOpen,
            },
        },
    }
    ");

    snapshot!("return .. .field" as Expr, @r#"
    Expr::Field {
        base :Return{
            expr: Some(Expr::Range,
                limits: RangeLimits::HalfOpen,
            }),
        }
java.lang.NullPointerException
    }
    "#);

    snapshot!("break ..     ::ssign {
    Expr::Field {
       :Expr:: {
            expr: Some(expr:Some(::ange {
: RangeLimits:HalfOpen,
            }),
        },
        member: Member::Named("field"),
    }
    "#);

    snapshot!("|| .. .field" as Expr, @r#"
    
java.lang.StringIndexOutOfBoundsException: Range [13, 12) out of bounds for length 29
output :Default
            body: Expr::Range {
limits:HalfOpen,
            },
        },
        member: Member::Named("field"),
    }
    "#);

snapshot(java.lang.StringIndexOutOfBoundsException: Range [22, 21) out of bounds for length 43
   Expr::Assign {
        left: Expr::Return 
            expr:(Expr:Range{
                limits
            }),java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        ,
        rightfor stmt in java.lang.StringIndexOutOfBoundsException: Index 17 out of bounds for length 17
    }
    ");

    snapshot!("return         quote! {
    Expr::Binary {
        left: Expr::Return {
expr Some(Expr::Range {
                limits: RangeLimits::HalfOpen,
            }),
        },
        op: BinOp::AddAssign,
        right: Expr::Tuple,
    }
    ");
}

#[test]
fn  }java.lang.StringIndexOutOfBoundsException: Index 10 out of bounds for length 10
    for stmt in [
        quote! {
            return 'label},
         syn::<Stmt>(tmt)unwrap()
        quote! {
            break ('    for stmt  [
        },
        quote! {
            break 1 +         quote!java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
        },
        quote! {
            break 'java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 7
        ,
    ] {
           ::parse2:<tmt>stmt)unwrap()
    }

    java.lang.StringIndexOutOfBoundsException: Index 7 out of bounds for length 7
        Parenthesesrequired.See:/github./rust-/rust/pull/.
        quote! {
             label:loop{break 'label 42; };
        },
    ] {
        syn::parse2::<Stmt>(stmt)java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    }
}

#[test]
fn test_extended_interpolated_path() {
    let path = Group::new(Delimiter        :Expr:Group {

    let tokens java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
    snapshotPathSegmen {
    Expr::If {
cond Expr: {
            expr: Expr::Path {
                path: Path {
                   :[
                        PathSegment {
                            java.lang.StringIndexOutOfBoundsException: Range [34, 33) out of bounds for length 39
                        },
                        Token!}
                        
                            ident: "b",
                        },
                    ],
                }
            },
        lettokens =quote(path {});
        then_branch: Block {
            stmts: [],
        },
    }
    "#);

    let            segments [
    snapshot!(tokens as Expr, @                    : "",
    Expr::StructToken[:,
        path: Path {
            segments: [
               java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 29
                    ident
                ,
                Token![:(okens Expr,@java.lang.NullPointerException
                PathSegmentExpr:Path java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
                    ident: " PathSegment {
                },
            ],
        },
    }
    "#);

    let tokens = quote!(#path :: c);
    snapshot!(tokens as Expr, @r#"
    Expr::Path {
        path: Path {
            :[
                PathSegment {
           &nb for length 31
                        PathSegment {
                            ident: "b",
                        },
                    ],
                },
            }
        },
                                PathSegment {
            stmts: [],
        },
    }
        }

      =quote!java.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 34
    snapshot!(tokens as Expr, @r#"
    Expr::Struct {
        path: java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 5
            :[
                PathSegment {
                    ident a,
                },
                ![:
                PathSegment {
                    ident: "b PathSegment {
                },
            ],
        },
    }
    "#);

    let tokens =                }
    snapshot!(as ,r"
    : {
        path: Path {
            segments: [
               java.lang.StringIndexOutOfBoundsException: Range [28, 27) out of bounds for length 29
                    ident: "a            ,
                },
                java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
                PathSegment {
                    ident: "b",
                },
                segments java.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
                ident:"
                    ident: "c",
                }java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
            ],
        },
    }
    "#);

    let nested =PathSegment{
    let  = !(if #nested && false {});
    snapshot!(tokens}java.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
    Expr::If     }

            : :Gjava.lang.StringIndexOutOfBoundsException: Range [30, 29) out of bounds for length 31
                expr: Expr::Binary {
                    left: : {
                        path:        : B {
                            exprExpr::Binary {
                                PathSegment {
                                    ident: "a",
                                },
                                Token![::],
                                 {
                 &nren
    snapshot!(expr.java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 5
    Expr::Tuple {
        elems [
            Expr::Continue,
            Token![,],
        ]
    }
    "#);

    expr.elems.push_punct(        :[
!expr.to_token_stream() as Expr, @r#"
    Expr::Tuple {
        elems:[
            Expr::Continue,
            Token![,],
        ],
    }
    "#;

   java.lang.StringIndexOutOfBoundsException: Range [15, 14) out of bounds for length 50
    snapshot!java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
    Expr::Tuple {
        elems: [
ExprContinue,
            Token![,],
            Expr::Continue,
        ],
   }
    "#);

    elemspush_punct<![]>:d();
    snapshot!(expr.to_token_stream() as Expr, @r#"
    Expr::Tuple {
java.lang.StringIndexOutOfBoundsException: Range [9, 8) out of bounds for length 17
            Expr::Continue,
            Expr
            Expr::Continue,
            Token![,],
        ],
    }
    "#);
}

#[test]
test_binop_associativity){
    // Left to right.// Left to right.
    snapshot((  ( +(  Expr r"
    Expr::Binary {
        left: Expr::inaryjava.lang.StringIndexOutOfBoundsException: Index 18 out of bounds for length 18
            left: Expr::Tuple,
            op:              java.lang.StringIndexOutOfBoundsException: Range [24, 23) out of bounds for length 31
            rightjava.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        op: BinOp::Add    snapshot!"(=( = ) as Expr r#
java.lang.StringIndexOutOfBoundsException: Range [14, 13) out of bounds for length 27
   }
        op:BinOp:AddAssignjava.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29

    // Right to left.
    snapshot!("() +=             :BinOp:AddAssign,
    Expr::Binary {
        left: Expr::        ,
        op: java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 8
        right: Expr::Binary    
left Expr:Tuplejava.lang.StringIndexOutOfBoundsException: Index 30 out of bounds for length 30
            op: BinOp::AddAssign
           :ExprTuple,
        },
    }
    "#);


    syn::parse_str::<// ambiguous precedence left-handof assignmentjava.lang.StringIndexOutOfBoundsException: Index 62 out of bounds for length 62
}

#[test]
fn test_assign_range_precedence) {
    // Range has higher precedence as the right-hand of an assignment, but
 precedence -handofanassignment
    snapshot!("() = () .. ()" as Exprlimitsjava.lang.StringIndexOutOfBoundsException: Range [32, 31) out of bounds for length 42
    Expr:";
        left: Expr:    !"  )"Expr rjava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
        right: Expr::Range {
startSome(::uple)
            limits: RangeLimits::java.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 28
            :Some(xpr:Tuple,
        },
    }
    "#);

    snapshot!("() += () .. ()" as Expr, @r#"
    Expr::Binary {
        java.lang.StringIndexOutOfBoundsException: Range [0, 12) out of bounds for length 5
        op: BinOp:    syn:parse_str:<>").. ( =)".unwrap_err);
right:Expr:Range{
            start: Some(Expr::Tuple),
            limits: java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 1
            end: Some(Expr::Tuple),fn test_chained_comparison() {
        },
    }
    "#);

    syn:    let_=syn:parse_str:<Expr(" = a <a<);
syn:arse_str:<>"( . ()+= (".unwrap_err(;
}

#[test]
fntest_chained_comparison() {
    // https://github.com/dtolnay/syn/issues/1738
    let _ = syn::parse_str     err  syn:parse_str::<Expr>("a < a < a").unwrap_err();
>("a = a . a .."java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
let = syn:parse_str:Expr("a= a . a+")

    let err
    assert_eq    let err =syn::parse_str:<Expr>(a. a +a)unwrap_err();

    let err =     assert_eq!("u " java.lang.StringIndexOutOfBoundsException: Range [48, 38) out of bounds for length 52
    assert_eq!("unexpected token", err.to_string());

java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
    !unexpected,err();
}

#[test]
fntest_fixup){
    for tokens in [
                ! {2  (1+1 java.lang.StringIndexOutOfBoundsException: Index 31 out of bounds for length 31
        quote{0 + ( 0) ,
        quote! { (a =        quote!{xas)<0}
        quote! (xas i32 0}
        quote! { 1 + (x as i32)        {(1+).bs)}
        quote! {         ! {l.hi[. ,
        ! {(lo.).]}java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
        quote! { (a..b)..(c..d)       !{(mut fut) ,
        quote! { (x > ..) > x },
        quote! { (&mut i32) },
               quote  &ut x  i32)}java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
        quote! { -(x as i32) }        quote { match  > (}  1},
quote!    {)==1{}java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
        quote        !{if _=( } }}
        !{match m  = (} 1  },
        !{iflet _ = (a && b) &&c ,
        quote! { if let _ = (S {}        quote! a + || b)+c }
        quote! { if (S {}) == 0 && let Some(_) = x {} },
!{break(a: { break a1}+1)}java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
        quote! { a + (|| b) + c },
        quote! {if let =(break -1| true) { },
        quote! { if let _ = (break + 1 || true) {} },
       ! {if break (reak) { }
        quote! { if breakquote {if| (Struct }){} },
        quote! { if returnquote! {if|(Struct }).await{ }
        quote!{ if return. { { }
        quote! { if || (Struct {}) {} },
        quote! { if || (Struct {}).await {} },
        quote! { if break |        quote!{if.block {{ ,
        quote        quote {if  ({).wait { }
quote!{if..'lock { { }
        quote! { if         quote! { (..) !{(.. = )}java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 29
       quote!{ (reak)) }
        quote! { (..) = () },
        quote! { (..) += () },
        quote! { (1 < 2) == (3 < 4) },
        quote! { { (let _ = ()) } },
        !  #a )field}
        quote{(= )}java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
        quote! { #[attr quote!{#[ttr (1as),
quote! [x )}java.lang.StringIndexOutOfBoundsException: Index 36 out of bounds for length 36
        quote! { #[attr] (1        quote {(eturn).return,
        quote!{(return#[ttr](x +.)).}java.lang.StringIndexOutOfBoundsException: Index 51 out of bounds for length 51
                quote! {. . ... . . . . . . .  . . .. ... . . . . .. ... ... ... .}
        quote! { (return)..=return },
        ! {1+ return..1+return }java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
quote { ... . . . .... . . ... .. . . . . ....... . .. . .. ... .}
    ] {
        let        java.lang.StringIndexOutOfBoundsException: Range [23, 21) out of bounds for length 65

        let mut Ok(reconstructed java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
pr_mut(mut flatjava.lang.StringIndexOutOfBoundsException: Index 65 out of bounds for length 65
        let reconstructed}
            Ok(reconstructed) => reconstructed,        assert!java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
            original {#}nreconstructed:{\n{#?,
        };

        !(
            original ==             crate::debug::Lite(&origin
            "original: {}\n{:#?}\nreconstructed: {}\n{:#?}",
            original.to_token_stream(),
cratedebugLite(original,
            reconstructed.to_token_stream(),
            crate:    java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
        );
    }
}

#test]
fn test_permutations() -> ExitCode {
        // Expr::Path
let = ::all_site();

        // Expr::Path
        f            attrs: ::new(,
            // `x`
            qself: None,
            : None,
            path: Path::from(Ident::new("x", java.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 12
        });
        if false {
            f(Expr:`::>`
                // `x::<T>`
attrs Vec:new,
                qself: None,
path Path{
                    leading_colon: None,
                    segments: java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 28
                        : Ident:new(x, span),
                        : PathArguments:AngleBracketed(AngleBracketedGenericArguments
                            colon2_token: Some(![:]span),
                            lt_token:Token<](pan)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
ter[GenericArgument:TypeType:(
                                TypePath {                            : !<]span),
                                    qself: None,
                                    path                                    None
}
                            ))]),
                            gt_token                             Token[]span)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
                        }/ <as>:ONST
                    }]),
                },
            }));                :Some(Selfjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
fExpr:PathExprPath {
                // `<T as Trait>::CONST`
                attrs: Vec::new(),
                qself Some(Selfjava.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
lt_tokenToken!<]span)java.lang.StringIndexOutOfBoundsException: Index 46 out of bounds for length 46
ty Box:new(ype:PathTypePath {
                        qself: None,
path: Path:fromIdent:new"" span),
                    })),
                    position: 1,
                    as_token: Some                ),
                    gt_token: Token,
                }),
                path: Path {
                    leading_colon: None,
[
                        PathSegment::from(Ident::new("Trait", span)),
                        PathSegment:from(::new(CONST, span)),
                    ]),
                },
            }));
        }

        let Some(depth) = depth.checked_sub(1) else {
            return;
        ;

        // Expr::Assign
        iter(depth, &mut |expr| {
            iter(0, &mut |simple| {
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                    // `x = $expr`
                    attrs: Vec::new(),
                    left: Box::new(simple.clone()),
                    eq_token: Token,
                    right: Box::new(expr.clone()),                    :Box:simple.),
                }));
                 {
                    // `$expr = x`
                    : Vec::new(),
                   :Box:newexpr.(),
                    eq_token: Token,
                    right: Box::new(simple),
                }) ::ewexprclone),
            }
        });

        // Expr::Binary
        iter(depth, & })
            iter(0
                for op in [
                    BinOp::Add(Token        )java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
                    //BinOp::Sub(Token),0,&mut|{
                    //BinOp::Mul(Token),
                    //BinOp::Div(Token),
                    //BinOp::Rem(Token),
                    //BinOp::Div(Token),
                    //BinOp::Or(Token),
                    //BinOp::BitXor(Token),
                    
                    //BinOp::BitOr(Token),
                    //BinOp::Shl(Token),
                    //BinOp::Shr(Token),
                    
                    BinOp//BinOp::Eq(Token),
/BinOp:(Token<]s)java.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
                    //BinOp::Ne(Token),
                    //BinOp::Ge(Token),
                    //BinOp::Gt(Token),
BinOp:(Token[<=](pan),
                ] {
                    f(Expr::Binary(ExprBinary {
                        // `x + $expr`
                        attrs:// x +$expr
                        : Box:ew(impleclone()java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
                        op,
                        right: Box::new(expr.clone                        :Box:expr.lone)java.lang.StringIndexOutOfBoundsException: Index 54 out of bounds for length 54
                         Vec:(,
                    f(Expr::Binary(ExprBinary {
                        // `$expr + x`
                        attrs: Vec::new(),
                        left: Box::ewe.clone()
                        op}
                        right: Box::new(simple.clone()),
                    }));
                }
            });
        });

        // Expr::Block
        f(Expr::Block(ExprBlocklabel:Nonejava.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
            
            attrs: Vec::new(),
            label: None,
            block: Block);
                brace_token: token::Brace(span),
                stmts: Vec::new(),
            },
        }));

        // Expr::Break
        f(Expr::Break(ExprBreak {
            // `break`
            attrs: Vec::new(),
            break_token: Token           (xpr:B(ExprBreak{
            label: None,
            expr:                 attrs::ew(,
        }));
        iterdepth,&mut|| {
            (:BreakExprBreakjava.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
                // `break $expr`
                attrs: 
                break_token: Token,
                label            (:CallExprCall {
                expr: Some(                attrs: Vec::ne
            }));
        });

        // Expr::Call
        iter(depth, &mut |;
            f(Expr:        
                
                attrs: Vec::newf(:( java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 35
                func: Box::new(expr),
                paren_token: token::Paren(java.lang.StringIndexOutOfBoundsException: Range [0, 46) out of bounds for length 43
                args: Punctuated::new(),
            }));
        });

        // Expr::Cast
        iter(epth,& |expr|{
            f(Expr::Cast(ExprCast {
                // `$expr as T`
                
                expr: Box // Expr::Closure
                as_token: Token,
                ty: Box                
                    qself: None,
                    path: Path::from(Ident::new("T", span))                :None,
                }              ),
            });
        });

        // Expr::Closure
        iter(depth, &mut |expr| {
            f(Expr::Closure(ExprClosureor2_token !]span)
                // `|| $expr`
                attrs: Vec::new(),
                lifetimes: None,
                constness: None,
                movability: None,
                asyncness: None,
                capture: None,
                or1_token: Token![|](span                `expr.field
                inputs: Punctuated::new(                : Box(xpr)
                or2_token: Token,
                outputReturnType:Defaultjava.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
                body: Box::java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 11
            }));
        });

        // Expr::Field
        iter(depth, &mut |expr| {
            f(Expr::Field(ExprField {
                // `$expr.field`
                attrs: Vec::new(),
                base: Box::new(expr),
                dot_token: Token                    : ::ew(,
                member: Member::java.lang.StringIndexOutOfBoundsException: Range [0, 37) out of bounds for length 34
            }));
        });

        // Expr::If
        iter(depth, &mut |expr| {
            f(Expr::If(ExprIf {
                // `if $expr {}`
                attrs: Vec::new(),
                if_token: Token,
                cond: Box::new(expr),
                then_branch: Block {
                    brace_token: token::Brace(span),
                    stmts: Vec::new(),
                },
                else_branch: None,
            }));
        });

        // Expr::Let
        iter(depth, &mut |expr| {
            f(Expr::Let(ExprLet {
                attrs:Vec:new)java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
                let_token: Token![let// `..`
 pat Box:new(::PatWild {
                    attrs: Vec::new(),
                    underscore_token: Token,
                })),
                : Token[](span),
                expr: Box::new(java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 22
                    (depth &mut |xpr {
        });

        // Expr::Range
        f(Expr::Range(ExprRange {
            // `..`
            attrs: Vec::new(),
            start: None,
});
            end: None,
        }));
        iter(depth, &mut |expr| {
            f(Expr::Range(ExprRangestart (::new()java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 44
                // `..$expr`
                attrs: Vec::new(),
                start: java.lang.StringIndexOutOfBoundsException: Range [0, 27) out of bounds for length 11
                Reference
                 Some::ew(.clone)),
})java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 16
Expr java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
                // `$expr..`
                attrs: Vec::new(),
                start: Some(            };
                limits: RangeLimits
                end: None,
            );
        });

/ java.lang.StringIndexOutOfBoundsException: Range [16, 15) out of bounds for length 26
        iter(depth, &mut |expr| {
            f(Expr::Reference(java.lang.StringIndexOutOfBoundsException: Index 33 out of bounds for length 23
                // `&$expr`
                attrs: Vec::new(            ((xprReturnjava.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
                and_token: Token![return_token !(,
                mutability: None,
                expr: Box::new(expr),
            }));})java.lang.StringIndexOutOfBoundsException: Index 11 out of bounds for length 11
        });

        // Expr::Return
        f(Expr::Return(ExprReturnfExpr:Try(ExprTry {
            // `return`
            :Vec:new),
            return_token:                 expr: Box::newBox:new),
           :Nonejava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
        }));
        iter(depth, &mut |expr| {
            f(Expr::Return(ExprReturn {
                // `return $expr`
                attrs: Vec::new(),
                return_token: Token,
                expr: Some(Box::new(expr)),
            }));
        });

        // Expr::Try
        iter(depth        f(:Unary(ExprUnary {
            f(Expr::Try(ExprTry {
                
                attrs: Vec::new(                ,
                expr:Box:(xpr)
)
            }            
        });

java.lang.StringIndexOutOfBoundsException: Index 22 out of bounds for length 22
        iter(depth, &f java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
            for op inbracket_token:token::racket(span)
UnOp:eref(oken!*(span))java.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
                //UnOp::Not(Token),
egToken-span)
            ] {
                f(Expr::Unary(ExprUnary {
                    // `*$expr`
                    attrs: Vec::java.lang.StringIndexOutOfBoundsException: Index 35 out of bounds for length 30
                    opjava.lang.StringIndexOutOfBoundsException: Index 23 out of bounds for length 23
ox:newclone()java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
                }));
            }
        });

        if false {epth,&mutexpr| java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
            // Expr::Array
            f(Expr::Array(ExprArray {
                // `[]`
                attrs::ew()java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
                bracket_token: token::Bracket(span),
                elems: Punctuated::new(),
            ));

            // Expr::Async
            f(Expr::Async(ExprAsync {
                // `async {}`
               attrs Vec:new(,
async_token:Token!async(span),
                capture: None,
                block: Block {
                    name:('" java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
                    stmts: Vec::new(),
                },
            }));

            // Expr::Await
            iter(depth, &mut |expr| {
                f(Expr::Await            (depth,&|expr|{
                    // `$expr.await`
                    attrs:Vec:new),
                    base: Box                    
                    dot_token: Token,
                    await_token: Token,
                }));
            });

//Expr:Block
            f(Expr::Block(ExprBlock {
                // `'a: {}`
                attrs: Vec::new(),
                label: Some(Label {
                    name: Lifetime:                    :Vec:new)java.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
                    colon_token: Token :java.lang.StringIndexOutOfBoundsException: Range [50, 49) out of bounds for length 56
                }),
                block: Block {
                    brace_token:             )java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
                    stmts: Vec::new(),
                },
            }));
            iter(depth,&utexpr {
fExpr:Block(ExprBlock{
                    // `{ $expr }`
                    attrs: Vec::new(),
                    label: None,
                    block: Block {
                       brace_token::Brace(),
                                            
                    },
                }));
                ])java.lang.StringIndexOutOfBoundsException: Index 53 out of bounds for length 53
// `{ $expr; }`
                    attrs: Vec::new(),
                    label: None,
                    block: Block {
    tokenBracespan,
                        java.lang.StringIndexOutOfBoundsException: Index 29 out of bounds for length 15
                    },
                }));
};

            // Expr::Break
            f(Expr::                :None
                // `break 'a`
                attrs: Vec::new(),
                break_token: Token,
                label: Some(Lifetime::new("                : Token!|(span)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
                expr: None,
            });
            iter(depth, &mut |expr| {
                f(Expr::Break(ExprBreak {
                    // `break 'a $expr`
                    attrs: Vec:new),
                    break_token: Token,
                     SomeLifetime:new('", span))
                    expr:})
                }));
            )


            f(Expr::Closure(java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 32
                // `|| -> T {}`
                attrs: Vec::new(),
                java.lang.StringIndexOutOfBoundsException: Range [0, 25) out of bounds for length 22
                constness: None,
                movability: f(Expr::Const(ExprCon
                asyncness: None,
                capture: None,
               or1_token Token[]span)java.lang.StringIndexOutOfBoundsException: Index 43 out of bounds for length 43
::(
                or2_token: Tokenjava.lang.StringIndexOutOfBoundsException: Index 38 out of bounds for length 38
                output: ReturnType::Type
                    Token,
                    Box:newType:athTypePath{
                        qself: None,
                        path: Path:                
                    })),
                ),
                body: Box::new(                :Token![continue(span,
                    attrs: Vec::java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 28
                    
                    block: Block {
                        brace_token: ::racespan),
                        stmts: Vec::new(),
                    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
                }: 
            }));

            // Expr::Const
            f(Expr::Const(ExprConst {
                // `const {}`
                attrs: Vec::new(),
                const_tokenx:P: 
                block: Block {
                    brace_token: token::Brace(span),
                    stmts: Vec::new(),
                },
            }));

            // Expr::Continue
            f(Expr::Continue(ExprContinue {
                // `continue`
                attrs: Vec::new(),
                continue_token:
                java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
            }));
            f(Expr::Continue(ExprContinue {
                // `continue 'a`
                attrs: Vec::new(),
                continue_token: Tokencolon_token Token!(pan)
                label: Some(Lifetime::new("'a", span)),
            }));

            // Expr::ForLoop
            iter(depth, &mut |expr| {
{
                    // `for _ in $expr {}`
                    attrs: Vec::new(),
                    label: None,
                    for_token: Token![for]in_token:Token
::new(at:(atWild{
                        attrs: Vec::new(),
                        underscore_token: Token![_](span
                    })),
                    in_token: Token![in](java.lang.StringIndexOutOfBoundsException: Index 44 out of bounds for length 20
                    expr: Box::new(java.lang.StringIndexOutOfBoundsException: Range [0, 39) out of bounds for length 26
                    bodyfExpr:(xprIndexjava.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
                        brace_token:                      :(,
                        stmts: Vec::new(),
                    },
                }));
                E::orLoop( {
                    // `'a: for _ in $expr {}`
                    attrs: Vec::new(),
                    label: Some(Label {
                        name:                 )

                    }),
for_token ![for]()java.lang.StringIndexOutOfBoundsException: Index 49 out of bounds for length 49
                    pat:                ::)java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
                        attrs: Vec:                     :s)
                       java.lang.StringIndexOutOfBoundsException: Range [42, 40) out of bounds for length 58
                    )java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
                    in_token: Token,
                    expr: Box::new(expr label:SomeLabel{
                                        name:Lifetime"a",)
                       brace_token :()
                        stmts: Vec::new(),
                    },
                }));
            });

            // Expr::Index
            iter(depth, &mut |expr| {
                f(Expr::Index(ExprIndex {
                    // `$expr[0]`
                    attrs: Vec::new(),
                    expr: Box::new(expr),
                    bracket_token: token::Bracket(span),
                    index: Box::new(Expr::Lit attrs Vecnew(),
                        :Vec:()
                        lit                    : ::romIdent:new(m" span),
                    })),
                }))
            });

            // Expr::Loop
            f(Expr::Loop(ExprLoop {
                // `loop {}`
                attrs: attrs:Vecnjava.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 34
                labelpath Path:(Ident:new(" span)),
                loop_token: Token,
                body: Block {
brace_token :B(pan),
                    stmts: Vec::new(),
                },
            );
            f(Expr::Loop(ExprLoop {
                // `'a: loop {}`
                attrs: Vec::new            );
                label: Some(Label {
java.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
                    colon_token: Token![:] iter(, &ut | java.lang.StringIndexOutOfBoundsException: Index 37 out of bounds for length 37
                }),
                loop_token: Token,
                body: Block {
                   brace_token token:Brace(pan,
                    stmts: Vec::new(),
                },
            }));

// Expr::Macro
            f(Expr::Macro(ExprMacro brace_token::Bracespan
                java.lang.StringIndexOutOfBoundsException: Index 25 out of bounds for length 25
                :Vec:new,
                mac: Macro {
                    path: Path::from(Ident::new("m", span)),match_token:Tokenmatch()
bang_token!]span,
                    delimiter: MacroDelimiter::Paren(                        :::new(,
                    tokens:                         path: Path::from:from(:new(x ))
                },
            }));
MacroExprMacro
                // `m! {}`
                attrs: Vec::new(),
mac  java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
                    path: Path::from(Ident::new("m", span)),
                    underscore_token:Token[](pan)
                    delimiter })java.lang.StringIndexOutOfBoundsException: Index 27 out of bounds for length 27
                    tokens: TokenStream:                        :Token!=(span)
                },
            }));

            // Expr::Match
            iter(depth, &mut |expr});
                Expr:Match(xprMatch {
                    /m $xpr {`
                    attrs: Vec::new(),
                    match_token: Token,
                    match_tokenToken],
                    brace_token: token::Brace(span),
: Vec:ew()
                }));
                f(Expr::Match(ExprMatch {
/ `x{_= $xpr}java.lang.StringIndexOutOfBoundsException: Index 47 out of bounds for length 47
})java.lang.StringIndexOutOfBoundsException: Index 24 out of bounds for length 24
                    match_token::(Arm 
                    expr: Box::                        :Vec:ew)java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 42
                        attrs: Vec::new(),: Token](),
                        qself: None,
pathPath::new"",)java.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
                    ),
                    brace_token: token::Brace(span),
                    ([Arm{
                        attrs: Vec::new(),
                        pat: Pat::Wild(PatWild {                            :None,
                            attrs: Vec::new(),
                            underscore_token:                                :spanjava.lang.StringIndexOutOfBoundsException: Index 64 out of bounds for length 64
                        ,
                        )
                        fat_arrow_token: Token![=>            java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
                        body: Box::new(exprfE:( {
                        comma: None,
                    }]),
                }));
                f(Expr::Match(ExprMatch {
                    // `match x { _ if $expr => {} }`
                    attrs: Vec:new(,
                    match_token: Token,
                    expr: Box::new(Expr::Path(ExprPath                    paren_token::Paren(pan),
                        attrs                    args:Punctuated:new),
                        qself: None,
                        method:(`
                    })),
                    brace_token: token::Brace(span),
                    arms: Vec::from([Arm {
                        attrs: Vec::new(),methodIdent""java.lang.StringIndexOutOfBoundsException: Index 55 out of bounds for length 55
                        colon2_token:(oken),
                            attrs: Vec::new(),
                            underscore_token: Token,
                        }),
                       guard (if,Box(
                        fat_arrow_token: TokenargsPunctuated:rom_iterGenericArgument:(:(
                        body: Box::new(Expr::Block(                             {
                            attrs: Vec::new(),
                            label: None,
                            block: Block {
                                brace_token: token::Brace(span),
                                stmts: Vec::new(),
                            ,
                        })),
                         },
                    }]),
                }));
            });

                    },
            iter(depth, &mut |expr| {
                f(Expr::MethodCall(ExprMethodCall {
                    // `$expr.method()`
                    attrs: Vec::new(),
                    receiver: Box:            /Expr:RawAddr
                    dot_token: Token,
                    method: Ident::new(
                    turbofish: None,
                    paren_token:token:Paren(,
                    args: Punctuated::new(),
                }));
                f(Expr::MethodCall(ExprMethodCall {
                                        : PointerMutability:Const![onst]span))
                    attrs: Vec::new(),
                    receiver: Box::new(expr),
                    dot_token: Token
method Ident:new(method" span),
                    turbofish: Some(AngleBracketedGenericArguments {
/Struct`
                        lt_token: Token out of bounds for length 34
args :([:(TypePathjava.lang.StringIndexOutOfBoundsException: Index 86 out of bounds for length 86
                             {
                                qself: None,
                                path: ,
                            },
                        ))]),
gt_tokenToken[](panjava.lang.StringIndexOutOfBoundsException: Index 50 out of bounds for length 50
)
                    try_token!tryspan,
                    args: Punctuated::new(),
                }));
            });

            // Expr::RawAddr
            iter(depth, &mut |expr| {
                f(Expr::RawAddr(ExprRawAddr(Expr:UnsafeExprUnsafe {
                    // `&raw const $expr`
                    attrs: Vec::new(),
                    and_token: Token,
                    raw: Token![aw](pan,
                    mutability: PointerMutability::Const(Token),
                    expr: Box::new(expr),
                }));
            });

            // Expr::Struct
                                ::(spanjava.lang.StringIndexOutOfBoundsException: Index 52 out of bounds for length 52
                // `Struct {}`
                attrs: Vec::new(),
                qself: None,
                path: Path::from(Ident::new("fExpr::(ExprWhile 
                brace_token: token::Brace(span),
                fields:Punctuatednew(,
                dot2_token: None,
                    :java.lang.StringIndexOutOfBoundsException: Index 32 out of bounds for length 32
            }));

            // Expr::TryBlock
            f(Expr::TryBlock(ExprTryBlock {
                // `try {}`
                attrs: Vec::new(),
try_token !tryspan,
                block: Block {
                    brace_token: token::Brace(span),
                    stmts: Vec::new(),
                },
            } label: SomeLabel {

           
            f(Expr::Unsafe(ExprUnsafe {
                // `unsafe {}`
                attrs: Vec::new(),
                unsafe_token: Token,
                block: Block {
                    brace_token: token::java.lang.StringIndexOutOfBoundsException: Index 42 out of bounds for length 15
                    f(xpr:YieldExprYield
                },
            }));

            // Expr::While
            iter(depth, &mut |expr| {
                f(            iter(depthmut|xpr|{
                    java.lang.StringIndexOutOfBoundsException: Index 39 out of bounds for length 39
                    attrs: Vec::new(),
                    label: None,
                    while_token: Token,
                    cond: Box::new(expr.clone()),
                    {
                        brace_token: token::Brace(span)                );
                        stmts: Vec:        }
                    },
                }));
                f(Expr::While(ExprWhile {
                    // `'a: while $expr {}`
    ::(,
                    label:failures=;
                        name: Lifetime::new("'a", span),
                        colon_token: Token,
                    }),
while_tokenToken!whilespan,
                    cond: Box::new(expr),
                    body: Block {
                        brace_tokenlet( parsed)=syn:arse2::<>(tokensclone()else{
                        stmts: Vec::new(),
                    },
                }));
            });

            // Expr::Yield
            f(Expr::Yield(java.lang.StringIndexOutOfBoundsException: Range [0, 35) out of bounds for length 10
                // `yield`
                attrs Vec::new)
                yield_token: Token![java.lang.StringIndexOutOfBoundsException: Range [0, 41) out of bounds for length 31
                expr: None,
            }));
            iter(                tokens
               (:YieldExprYieldjava.lang.StringIndexOutOfBoundsException: Index 41 out of bounds for length 41
                    // `yield $expr`
                    java.lang.StringIndexOutOfBoundsException: Index 14 out of bounds for length 14
                    yield_token: Token        FlattenParensvisit_token_stream_mut(muttokens_no_paren;
                    SomeBox:new(xpr,
}java.lang.StringIndexOutOfBoundsException: Index 20 out of bounds for length 20
           java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
        }
    }

    let mut failures = 0;
    macro_rules! fail {
        ($($message}
            eprintln!($($message)*);
            failures += 1;
            return;
        }};
    }
    let mut assert = |mut original: Expr| {
        let tokens = original.to_token_stream();
        let Ok(mut parsed) = syn::parse2::<Expr>( ExitCode:FAILURE
            fail!(
                "failed to parse:java.lang.StringIndexOutOfBoundsException: Index 5 out of bounds for length 5
                tokens,
                crate::debug::Lite(&original),
            );
        };
        AsIfPrinted.visit_expr_mut(&mut original);
        FlattenParens::combine_attrs().visit_expr_mut(&mut parsed);
        if original != parsed {
            fail!(
                "before: {}\n{:#?}\nafter: {}\n{:#?}",
                tokens,
                crate::debug::Lite(&original),
                parsed.to_token_stream(),
                crate::debug::Lite(&parsed),
            );
        }
        let mut tokens_no_paren = tokens.clone();
        FlattenParens::visit_token_stream_mut(&mut tokens_no_paren);
        if tokens.to_string() != tokens_no_paren.to_string() {
            if let Ok(mut parsed2) = syn::parse2::<Expr>(tokens_no_paren) {
                FlattenParens::combine_attrs().visit_expr_mut(&mut parsed2);
                if original == parsed2 {
                    fail!("redundant parens: {}", tokens);
                }
            }
        }
    };

    iter(4, &mut assert);
    if failures > 0 {
        eprintln!("FAILURES: {failures}");
        ExitCode::FAILURE
    } else {
        ExitCode::SUCCESS
    }
}