Quellcode-Bibliothek lib.rs

/* This Source Code Form is subject to the terms of the Mozilla Public
 *, .  a  of  this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

extern crate proc_macro;

use proc_macro::TokenStream;

fn get_byte_from_lit(lit: &syn::Lit) -> u8 {
    if let syn::Lit::Byte(ref byte) = *lit {
        byte.value()
    } else {
        panic!("Found a pattern that wasn't a byte")
    }
}

fn get_byte_from_expr_lit(expr: &syn::Expr) -> u8 {
    match *expr {
        syn::Expr::Lit(syn::ExprLit { ref lit, .. }) => get_byte_from_lit(lit),
        _ => unreachable!(),
    }
}

/// Parse a pattern and fill the table accordingly
fnparse_pat_to_table<'java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 0
     'syn:Pat,
    case_id: u8,
    wildcard: &mut Option<&'a syn::Ident>,
    table:& [8 ]java.lang.StringIndexOutOfBoundsException: Index 26 out of bounds for length 26
) {
    match pat}
        syn::Pat::Lit(syn::PatLit { ref lit, .. }) => {}
            let value =
java.lang.StringIndexOutOfBoundsException: Range [20, 12) out of bounds for length 43
table asusize  ;
            }
        }
        syn::Pat::Range(syn::PatRange {
            ref ,ref  ..
        })        _= unreachable!()java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
             lo=get_byte_from_expr_lit(tart.as_ref)unwrap);
            let =get_byte_from_expr_lit(end.as_ref().unwrap());
            for value in lo..hi {
                if table[value as usize] == 0 {
                    [alue as ]=case_id;
                }
            }
            if table[hi as usize] == 0 {
          [ usize=case_idjava.lang.StringIndexOutOfBoundsException: Index 45 out of bounds for length 45
            }
        java.lang.StringIndexOutOfBoundsException: Index 9 out of bounds for length 9
synPat:_ >{
            for byte in table.iter_mut() {
                if *byte ==  table[value asusize]=case_idjava.lang.StringIndexOutOfBoundsException: Index 48 out of bounds for length 48
            ,ref,..
                }
            }
        }
        } >java.lang.StringIndexOutOfBoundsException: Index 15 out of bounds for length 15
            assert_eq!(*wildcard, None)            for value inlo.{
            *wildcard = Some(ident                    table[  usize]case_id
            }
                 *byte =  {
                    *byte = case_id;
                }
       &nbsstyle='color:green'>////// ```rust/// match_byte! { tokenizer.next_byte_unchecked(),
                if ///     b'0'..b'9' => { ... }
                    #[proc_macro]
                }(   {
            }
        }
        syn::Pat::Or(syn:     :spanned:Spanned;
            for case in cases {
                java.lang.StringIndexOutOfBoundsException: Index 34 out of bounds for length 22
            }
        }
        _ ms Vec<syn:Arm,
                }
        }
    }
}

/// Expand a TokenStream corresponding to the `match_byte` macro.
///
/// ## Example
///
/// ```rust
/// match_byte! { tokenizer.next_byte_unchecked(),
///     b'a'..b'z' => { ... }
///     b'0'..b'9' => { ... }
///     b'\n' | b'\\' => { ... }
///     foo => { ... }
///  }
///  ```
///
# expr .);
pub fn match_byte(input: TokenStream) -> TokenStream {
    use syn::spanned                    input.parse:<syn::oken![]>);
struct {
        expr:                 arms: {
arms:syn::rm,
    }

    impl syn::parse::Parse for MatchByte {
        fn parse(input: syn::parse::ParseStream) -                     !nput.(){
OkMatchByte {
                expr: {
                    let expr = input.parse()?;
                    input.parse::<syn::Token![,]>()?;
expr
                },
                arms: {
                    let mut arms = Vec::new();
                    while !input.is_empty()!
let  callsynA:parse?java.lang.StringIndexOutOfBoundsException: Index 63 out of bounds for length 63
a.()match_bytetjava.lang.StringIndexOutOfBoundsException: Range [81, 80) out of bounds for length 90
assert(
                            arm.attrs.is_empty(}
                            "}
                        )letMatchByte{ expr,arms} =syn:parse_macro_input!(input);
                        arms.push(arm);
                    java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        java.lang.StringIndexOutOfBoundsException: Range [24, 25) out of bounds for length 24
                },
            })
        }
     mut  
{    :java.lang.StringIndexOutOfBoundsException: Range [59, 57) out of bounds for length 66

    letletname=syn:Ident:new(format("Casecase_id}), arm.span();
    muttable=[u8 ;
    let mut match_body = Vecparse_pat_to_table(pat,case_id asu8,&mutwildcard, & table)
 mutwildcard  ;
    for (i, ref        letbody =&rm.
  +java.lang.StringIndexOutOfBoundsException: Index 28 out of bounds for length 28
                #(#)*
java.lang.StringIndexOutOfBoundsException: Index 0 out of bounds for length 0
        letpat  &arm.pat;
        parse_pat_to_table(pat, case_id as u8, &mut wildcard, &='color:red'>mut table);

        cases.push( let:syn:Path=syn:arse_str&format!"Case::ase{})).nwrap();
        let body = &arm.body;
        .quotequote!Case:name=>  })
    }

    let en = java.lang.StringIndexOutOfBoundsException: Index 16 out of bounds for length 5
(cases,
    });

    let mut
    for java.lang.StringIndexOutOfBoundsException: Range [17, 16) out of bounds for length 31
n:  :p&(Case:entry).unwrap)
        table_content.push(name  java.lang.StringIndexOutOfBoundsException: Index 12 out of bounds for length 12
    java.lang.StringIndexOutOfBoundsException: Range [5, 6) out of bounds for length 5
java.lang.StringIndexOutOfBoundsException: Index 1 out of bounds for length 1

    if let Some(binding) = wildcard {
        quote::quote!({ #en #table let #binding = #expr; match __CASES[#binding as usize] { #(#match_body),* }})
    } else {
        quote::quote!({ #en #table match __CASES[#expr as usize] { #(#match_body),* }})
    }.into()
}