LCOV - code coverage report
Current view: top level - gcc/rust/expand - rust-macro-builtins.h (source / functions) Coverage Total Hit
Test: gcc.info Lines: 100.0 % 2 2
Test Date: 2024-04-27 14:03:13 Functions: - 0 0
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_MACRO_BUILTINS_H
      20                 :             : #define RUST_MACRO_BUILTINS_H
      21                 :             : 
      22                 :             : #include "rust-ast.h"
      23                 :             : #include "rust-ast-fragment.h"
      24                 :             : #include "rust-location.h"
      25                 :             : #include "bi-map.h"
      26                 :             : 
      27                 :             : namespace Rust {
      28                 :             : 
      29                 :             : // FIXME: Add a BuiltinMacro class which contains a name (or should it?), a
      30                 :             : // transcriber and extra info if necessary
      31                 :             : // then make a global map<string, BuiltinMacro>
      32                 :             : 
      33                 :             : /**
      34                 :             :  * All builtin macros possible
      35                 :             :  */
      36                 :             : enum class BuiltinMacro
      37                 :             : {
      38                 :             :   Assert,
      39                 :             :   File,
      40                 :             :   Line,
      41                 :             :   Column,
      42                 :             :   IncludeBytes,
      43                 :             :   IncludeStr,
      44                 :             :   Stringify,
      45                 :             :   CompileError,
      46                 :             :   Concat,
      47                 :             :   Env,
      48                 :             :   OptionEnv,
      49                 :             :   Cfg,
      50                 :             :   Include,
      51                 :             :   FormatArgs,
      52                 :             :   FormatArgsNl,
      53                 :             :   ConcatIdents,
      54                 :             :   ModulePath,
      55                 :             :   Asm,
      56                 :             :   LlvmAsm,
      57                 :             :   GlobalAsm,
      58                 :             :   LogSyntax,
      59                 :             :   TraceMacros,
      60                 :             :   Test,
      61                 :             :   Bench,
      62                 :             :   TestCase,
      63                 :             :   GlobalAllocator,
      64                 :             :   CfgAccessible,
      65                 :             :   RustcDecodable,
      66                 :             :   RustcEncodable,
      67                 :             :   Clone,
      68                 :             :   Copy,
      69                 :             :   Debug,
      70                 :             :   Default,
      71                 :             :   Eq,
      72                 :             :   PartialEq,
      73                 :             :   Ord,
      74                 :             :   PartialOrd,
      75                 :             :   Hash,
      76                 :             : };
      77                 :             : 
      78                 :             : BuiltinMacro
      79                 :             : builtin_macro_from_string (const std::string &identifier);
      80                 :             : 
      81                 :             : /**
      82                 :             :  * This class provides a list of builtin macros implemented by the compiler.
      83                 :             :  * The functions defined are called "builtin transcribers" in that they replace
      84                 :             :  * the transcribing part of a macro definition.
      85                 :             :  *
      86                 :             :  * Like regular macro transcribers, they are responsible for building and
      87                 :             :  * returning an AST fragment: basically a vector of AST nodes put together.
      88                 :             :  *
      89                 :             :  * Unlike regular declarative macros where each match arm has its own associated
      90                 :             :  * transcriber, builtin transcribers are responsible for handling all match arms
      91                 :             :  * of the macro. This means that you should take extra care when implementing a
      92                 :             :  * builtin containing multiple match arms: You will probably need to do some
      93                 :             :  * lookahead in order to determine which match arm the user intended to use.
      94                 :             :  *
      95                 :             :  * An example of this is the `assert!()` macro:
      96                 :             :  *
      97                 :             :  * ```
      98                 :             :  *  macro_rules! assert {
      99                 :             :  *      ($cond:expr $(,)?) => {{ ... }};
     100                 :             :  *      ($cond : expr, $ ($arg : tt) +) = > {{ ... }};
     101                 :             :  * }
     102                 :             :  * ```
     103                 :             :  *
     104                 :             :  * If more tokens exist beyond the optional comma, they need to be handled as
     105                 :             :  * a token-tree for a custom panic message.
     106                 :             :  *
     107                 :             :  * These builtin macros with empty transcribers are defined in the standard
     108                 :             :  * library. They are marked with a special attribute, `#[rustc_builtin_macro]`.
     109                 :             :  * When this attribute is present on a macro definition, the compiler should
     110                 :             :  * look for an associated transcriber in the mappings. Meaning that you must
     111                 :             :  * remember to insert your transcriber in the `builtin_macros` map of the
     112                 :             :  *`Mappings`.
     113                 :             :  *
     114                 :             :  * This map is built as a static variable in the `insert_macro_def()` method
     115                 :             :  * of the `Mappings` class.
     116                 :             :  */
     117                 :             : class MacroBuiltin
     118                 :             : {
     119                 :             : public:
     120                 :             :   static const BiMap<std::string, BuiltinMacro> builtins;
     121                 :             :   static std::unordered_map<std::string, AST::MacroTranscriberFunc>
     122                 :             :     builtin_transcribers;
     123                 :             : 
     124                 :             :   static tl::optional<AST::Fragment>
     125                 :             :   assert_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     126                 :             : 
     127                 :             :   static tl::optional<AST::Fragment> file_handler (location_t invoc_locus,
     128                 :             :                                                    AST::MacroInvocData &invoc);
     129                 :             : 
     130                 :             :   static tl::optional<AST::Fragment>
     131                 :             :   column_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     132                 :             : 
     133                 :             :   static tl::optional<AST::Fragment>
     134                 :             :   include_bytes_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     135                 :             : 
     136                 :             :   static tl::optional<AST::Fragment>
     137                 :             :   include_str_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     138                 :             : 
     139                 :             :   static tl::optional<AST::Fragment>
     140                 :             :   stringify_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     141                 :             : 
     142                 :             :   static tl::optional<AST::Fragment>
     143                 :             :   compile_error_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     144                 :             : 
     145                 :             :   static tl::optional<AST::Fragment>
     146                 :             :   concat_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     147                 :             : 
     148                 :             :   static tl::optional<AST::Fragment> env_handler (location_t invoc_locus,
     149                 :             :                                                   AST::MacroInvocData &invoc);
     150                 :             : 
     151                 :             :   static tl::optional<AST::Fragment> cfg_handler (location_t invoc_locus,
     152                 :             :                                                   AST::MacroInvocData &invoc);
     153                 :             : 
     154                 :             :   static tl::optional<AST::Fragment>
     155                 :             :   include_handler (location_t invoc_locus, AST::MacroInvocData &invoc);
     156                 :             : 
     157                 :             :   static tl::optional<AST::Fragment> line_handler (location_t invoc_locus,
     158                 :             :                                                    AST::MacroInvocData &invoc);
     159                 :             : 
     160                 :             :   static tl::optional<AST::Fragment> sorry (location_t invoc_locus,
     161                 :             :                                             AST::MacroInvocData &invoc);
     162                 :             : 
     163                 :             :   /* Builtin procedural macros do not work directly on tokens, but still need a
     164                 :             :    * builtin transcriber to be considered proper builtin macros */
     165                 :             :   static tl::optional<AST::Fragment> proc_macro_builtin (location_t,
     166                 :             :                                                          AST::MacroInvocData &);
     167                 :             : };
     168                 :             : } // namespace Rust
     169                 :             : 
     170                 :             : namespace std {
     171                 :             : template <> struct hash<Rust::BuiltinMacro>
     172                 :             : {
     173                 :      432556 :   size_t operator() (const Rust::BuiltinMacro &macro) const noexcept
     174                 :             :   {
     175                 :      432556 :     return hash<std::underlying_type<Rust::BuiltinMacro>::type> () (
     176                 :             :       static_cast<std::underlying_type<Rust::BuiltinMacro>::type> (macro));
     177                 :             :   }
     178                 :             : };
     179                 :             : } // namespace std
     180                 :             : 
     181                 :             : #endif // RUST_MACRO_BUILTINS_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.