LCOV - code coverage report
Current view: top level - gcc/rust/resolve - rust-ast-resolve-pattern.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 100.0 % 16 16
Test Date: 2024-04-20 14:03:02 Functions: 100.0 % 1 1
Legend: Lines: hit not hit | Branches: + taken - not taken # not executed Branches: - 0 0

             Branch data     Line data    Source code
       1                 :             : // Copyright (C) 2020-2024 Free Software Foundation, Inc.
       2                 :             : 
       3                 :             : // This file is part of GCC.
       4                 :             : 
       5                 :             : // GCC is free software; you can redistribute it and/or modify it under
       6                 :             : // the terms of the GNU General Public License as published by the Free
       7                 :             : // Software Foundation; either version 3, or (at your option) any later
       8                 :             : // version.
       9                 :             : 
      10                 :             : // GCC is distributed in the hope that it will be useful, but WITHOUT ANY
      11                 :             : // WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12                 :             : // FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
      13                 :             : // for more details.
      14                 :             : 
      15                 :             : // You should have received a copy of the GNU General Public License
      16                 :             : // along with GCC; see the file COPYING3.  If not see
      17                 :             : // <http://www.gnu.org/licenses/>.
      18                 :             : 
      19                 :             : #ifndef RUST_AST_RESOLVE_PATTERN_H
      20                 :             : #define RUST_AST_RESOLVE_PATTERN_H
      21                 :             : 
      22                 :             : #include "rust-ast-resolve-base.h"
      23                 :             : #include "rust-ast-full.h"
      24                 :             : 
      25                 :             : namespace Rust {
      26                 :             : namespace Resolver {
      27                 :             : 
      28                 :             : // Specifies whether the set of already bound patterns are related by 'Or' or
      29                 :             : // 'Product'. Used to check for multiple bindings to the same identifier.
      30                 :             : enum PatternBoundCtx
      31                 :             : {
      32                 :             :   // A product pattern context (e.g. struct and tuple patterns)
      33                 :             :   Product,
      34                 :             :   // An or-pattern context (e.g. p_0 | p_1 | ...)
      35                 :             :   Or,
      36                 :             : };
      37                 :             : 
      38                 :       88321 : struct PatternBinding
      39                 :             : {
      40                 :             :   PatternBoundCtx ctx;
      41                 :             :   std::set<Identifier> idents;
      42                 :             : 
      43                 :       23569 :   PatternBinding (PatternBoundCtx ctx, std::set<Identifier> idents)
      44                 :       23569 :     : ctx (ctx), idents (idents)
      45                 :             :   {}
      46                 :             : };
      47                 :             : 
      48                 :             : // Info that gets stored in the map. Helps us detect if two bindings to the same
      49                 :             : // identifier have different mutability or ref states.
      50                 :             : class BindingTypeInfo
      51                 :             : {
      52                 :             :   Mutability mut;
      53                 :             :   bool is_ref;
      54                 :             :   location_t locus;
      55                 :             : 
      56                 :             : public:
      57                 :       17295 :   BindingTypeInfo (Mutability mut, bool is_ref, location_t locus)
      58                 :       17295 :     : mut (mut), is_ref (is_ref), locus (locus)
      59                 :             :   {}
      60                 :             : 
      61                 :       35176 :   BindingTypeInfo (BindingTypeInfo const &other)
      62                 :       35176 :     : mut (other.mut), is_ref (other.is_ref), locus (other.get_locus ())
      63                 :             :   {}
      64                 :             : 
      65                 :           7 :   BindingTypeInfo (){};
      66                 :             : 
      67                 :       34737 :   location_t get_locus () const { return locus; }
      68                 :             :   Mutability get_mut () const { return mut; }
      69                 :             :   bool get_is_ref () const { return is_ref; }
      70                 :             : 
      71                 :             :   BindingTypeInfo operator= (BindingTypeInfo const &other)
      72                 :             :   {
      73                 :             :     mut = other.mut;
      74                 :             :     is_ref = other.is_ref;
      75                 :             :     locus = other.get_locus ();
      76                 :             : 
      77                 :             :     return *this;
      78                 :             :   }
      79                 :             : 
      80                 :         156 :   bool operator== (BindingTypeInfo const &other)
      81                 :             :   {
      82                 :         142 :     return mut == other.mut && is_ref == other.is_ref;
      83                 :             :   }
      84                 :             : 
      85                 :         156 :   bool operator!= (BindingTypeInfo const &other)
      86                 :             :   {
      87                 :         326 :     return !BindingTypeInfo::operator== (other);
      88                 :             :   }
      89                 :             : };
      90                 :             : 
      91                 :             : typedef std::map<Identifier, BindingTypeInfo> BindingMap;
      92                 :             : 
      93                 :             : class PatternDeclaration : public ResolverBase
      94                 :             : {
      95                 :             :   using Rust::Resolver::ResolverBase::visit;
      96                 :             : 
      97                 :             : public:
      98                 :             :   static void go (AST::Pattern *pattern, Rib::ItemType type);
      99                 :             :   static void go (AST::Pattern *pattern, Rib::ItemType type,
     100                 :             :                   std::vector<PatternBinding> &bindings);
     101                 :             : 
     102                 :             :   void visit (AST::IdentifierPattern &pattern) override;
     103                 :             :   void visit (AST::GroupedPattern &pattern) override;
     104                 :             :   void visit (AST::ReferencePattern &pattern) override;
     105                 :             :   void visit (AST::PathInExpression &pattern) override;
     106                 :             :   void visit (AST::StructPattern &pattern) override;
     107                 :             :   void visit (AST::TupleStructPattern &pattern) override;
     108                 :             :   void visit (AST::TuplePattern &pattern) override;
     109                 :             :   void visit (AST::RangePattern &pattern) override;
     110                 :             :   void visit (AST::AltPattern &pattern) override;
     111                 :             :   void visit (AST::SlicePattern &pattern) override;
     112                 :             : 
     113                 :             :   void add_new_binding (Identifier ident, NodeId node_id, BindingTypeInfo info);
     114                 :             :   void check_bindings_consistency (std::vector<BindingMap> &binding_maps);
     115                 :             : 
     116                 :             : private:
     117                 :       17501 :   PatternDeclaration (std::vector<PatternBinding> &bindings_with_ctx,
     118                 :             :                       Rib::ItemType type)
     119                 :       17501 :     : ResolverBase (), bindings_with_ctx (bindings_with_ctx), type (type)
     120                 :       17501 :   {}
     121                 :             : 
     122                 :             :   // To avoid having a separate visitor for consistency checks, we store
     123                 :             :   // bindings in two forms:
     124                 :             : 
     125                 :             :   // 1) Bindings as a vector of context-related sets.
     126                 :             :   // Used for checking multiple bindings to the same identifier (i.e. E0415,
     127                 :             :   // E0416).
     128                 :             :   std::vector<PatternBinding> &bindings_with_ctx;
     129                 :             : 
     130                 :             :   // 2) Bindings as a map between identifiers and binding info.
     131                 :             :   // Used for checking consistency between alt patterns (i.e. E0408, E0409).
     132                 :             :   BindingMap binding_info_map;
     133                 :             : 
     134                 :             :   // we need to insert the missing and inconsistent bindings (found in
     135                 :             :   // check_bindings_consistency) into maps to avoid duplication of error
     136                 :             :   // messages.
     137                 :             :   BindingMap inconsistent_bindings;
     138                 :             :   BindingMap missing_bindings;
     139                 :             : 
     140                 :             :   Rib::ItemType type;
     141                 :             : };
     142                 :             : 
     143                 :             : } // namespace Resolver
     144                 :             : } // namespace Rust
     145                 :             : 
     146                 :             : #endif // RUST_AST_RESOLVE_PATTERN_H
        

Generated by: LCOV version 2.1-beta

LCOV profile is generated on x86_64 machine using following configure options: configure --disable-bootstrap --enable-coverage=opt --enable-languages=c,c++,fortran,go,jit,lto,rust,m2 --enable-host-shared. GCC test suite is run with the built compiler.