[gcc r14-7981] gccrs: Add proc macro ast representation

[Arthur Cohen]

https://gcc.gnu.org/g:7c265ce70b5104b6c6ea2ec0efe3b0f47ea0bbb8

commit r14-7981-g7c265ce70b5104b6c6ea2ec0efe3b0f47ea0bbb8
Author: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>
Date:   Mon Jul 31 18:26:40 2023 +0200

    gccrs: Add proc macro ast representation
    
    When resolving proc macros it is convenient to store every macro
    directly in the extern crate. These class in the ast module provide a
    better abstraction over the raw ProcMacro::{CustomDerive, Bang,
    Attribute} structures provided by the proc_macro library.
    
    gcc/rust/ChangeLog:
    
            * ast/rust-ast.h (class BangProcMacro): Add new proc macro
            abstraction.
            (class AttributeProcMacro): Likewise.
            (class CustomDeriveProcMacro): Likewise.
    
    Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

Diff:
---
 gcc/rust/ast/rust-ast.h | 65 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 65 insertions(+)

diff --git a/gcc/rust/ast/rust-ast.h b/gcc/rust/ast/rust-ast.h
index 136da86525d..b78c4291e7a 100644
--- a/gcc/rust/ast/rust-ast.h
+++ b/gcc/rust/ast/rust-ast.h
@@ -1950,6 +1950,71 @@ public:
   }
 };
 
+class BangProcMacro
+{
+private:
+  std::string name;
+  NodeId node_id;
+  ProcMacro::BangMacro macro;
+
+public:
+  BangProcMacro (ProcMacro::Bang macro)
+    : name (macro.name),
+      node_id (Analysis::Mappings::get ()->get_next_node_id ()),
+      macro (macro.macro)
+  {}
+
+  const std::string &get_name () const { return name; }
+
+  NodeId get_node_id () const { return node_id; }
+
+  ProcMacro::BangMacro get_handle () const { return macro; }
+};
+
+class AttributeProcMacro
+{
+private:
+  std::string name;
+  NodeId node_id;
+  ProcMacro::AttributeMacro macro;
+
+public:
+  AttributeProcMacro (ProcMacro::Attribute macro)
+    : name (macro.name),
+      node_id (Analysis::Mappings::get ()->get_next_node_id ()),
+      macro (macro.macro)
+  {}
+
+  const std::string &get_name () const { return name; }
+
+  NodeId get_node_id () const { return node_id; }
+
+  ProcMacro::AttributeMacro get_handle () const { return macro; }
+};
+
+class CustomDeriveProcMacro
+{
+private:
+  std::string trait_name;
+  std::vector<std::string> attributes;
+  NodeId node_id;
+  ProcMacro::CustomDeriveMacro macro;
+
+public:
+  CustomDeriveProcMacro (ProcMacro::CustomDerive macro)
+    : trait_name (macro.trait_name),
+      attributes (macro.attributes, macro.attributes + macro.attr_size),
+      node_id (Analysis::Mappings::get ()->get_next_node_id ()),
+      macro (macro.macro)
+  {}
+
+  const std::string &get_trait_name () const { return trait_name; }
+
+  NodeId get_node_id () const { return node_id; }
+
+  ProcMacro::CustomDeriveMacro get_handle () const { return macro; }
+};
+
 // A crate AST object - holds all the data for a single compilation unit
 struct Crate
 {