[gcc r14-8095] gccrs: Add containers for proc macro collection mappings

[Arthur Cohen]

https://gcc.gnu.org/g:f915a3fe9027a8eececd16425d890480bfec2fe7

commit r14-8095-gf915a3fe9027a8eececd16425d890480bfec2fe7
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Wed Sep 6 14:34:45 2023 +0200

    gccrs: Add containers for proc macro collection mappings
    
    Add one container for each kind of procedural macro mapping. Also add a
    new structure to gather informations required for derive procedural
    macros. Add different functions to fill those new containers.
    
    gcc/rust/ChangeLog:
    
            * backend/rust-compile-context.h (struct CustomDeriveInfo): Add
            new derive procedural macro metadata information holder for
            mappings.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/backend/rust-compile-context.h | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/gcc/rust/backend/rust-compile-context.h b/gcc/rust/backend/rust-compile-context.h
index ff44c1ea779..79e3457f110 100644
--- a/gcc/rust/backend/rust-compile-context.h
+++ b/gcc/rust/backend/rust-compile-context.h
@@ -38,6 +38,13 @@ struct fncontext
   TyTy::BaseType *retty;
 };
 
+struct CustomDeriveInfo
+{
+  tree fndecl;
+  std::string trait_name;
+  std::vector<std::string> attributes;
+};
+
 class Context
 {
 public:
@@ -357,6 +364,18 @@ public:
 
   static hashval_t type_hasher (tree type);
 
+  void collect_attribute_proc_macro (tree fndecl)
+  {
+    attribute_macros.push_back (fndecl);
+  }
+
+  void collect_bang_proc_macro (tree fndecl) { bang_macros.push_back (fndecl); }
+
+  void collect_derive_proc_macro (CustomDeriveInfo macro)
+  {
+    custom_derive_macros.push_back (macro);
+  }
+
 private:
   Resolver::Resolver *resolver;
   Resolver::TypeCheckContext *tyctx;
@@ -381,6 +400,10 @@ private:
   std::map<HirId, tree> implicit_pattern_bindings;
   std::map<hashval_t, tree> main_variants;
 
+  std::vector<CustomDeriveInfo> custom_derive_macros;
+  std::vector<tree> attribute_macros;
+  std::vector<tree> bang_macros;
+
   // closure bindings
   std::vector<HirId> closure_scope_bindings;
   std::map<HirId, std::map<HirId, tree>> closure_bindings;