gccrs: rework the HIR dump pass

Nearly complete rewrite of the HIR dump pass.

fixes #693

gcc/rust/ChangeLog:

	* hir/rust-hir-dump.cc (convert_param_kind_to_str): New.
	(convert_new_bind_type_to_str): New.
	(convert_mut_to_str): New.
	(Dump::go): New.
	(Dump::put): New.
	(Dump::begin): New.
	(Dump::end): New.
	(Dump::begin_field): New.
	(Dump::end_field): New.
	(Dump::put_field): New.
	(Dump::visit_field): New.
	(Dump::visit): Refactor.
	(Dump::visit_collection): New.
	(Dump::do_traititem): New.
	(Dump::do_vis_item): New.
	(Dump::do_functionparam): New.
	(Dump::do_pathpattern): New.
	(Dump::do_structexprstruct): New.
	(Dump::do_expr): New.
	(Dump::do_pathexpr): New.
	(Dump::do_typepathsegment): New.
	(Dump::do_typepathfunction): New.
	(Dump::do_qualifiedpathtype): New.
	(Dump::do_operatorexpr): New.
	(Dump::do_mappings): New.
	(Dump::do_inner_attrs): New.
	(Dump::do_outer_attrs): New.
	(Dump::do_baseloopexpr): New.
	(Dump::do_ifletexpr): New.
	(Dump::do_struct): New.
	(Dump::do_enumitem): New.
	(Dump::do_traitfunctiondecl): New.
	(Dump::do_externalitem): New.
	(Dump::do_namefunctionparam): New.
	(Dump::do_stmt): New.
	(Dump::do_type): New.
	(Dump::do_item): New.
	(Dump::do_tuplefield): New.
	(Dump::do_structfield): New.
	(Dump::do_genericargs): New.
	(Dump::do_maybenamedparam): New.
	* hir/rust-hir-dump.h: Refactor.
	* hir/tree/rust-hir-item.h (enum_to_str): New.
	* hir/tree/rust-hir-type.h (enum_to_str): New.
	* hir/tree/rust-hir.cc (enum_to_str): New.
	* util/rust-common.h (enum_to_str): New.

Signed-off-by: Marc Poulhiès <dkm@kataplop.net>

3 files changed, 34 insertions, 0 deletions

diff --git a/gcc/rust/hir/tree/rust-hir-item.h b/gcc/rust/hir/tree/rust-hir-item.h
index 2d4cae5..cb0dc13 100644
--- a/gcc/rust/hir/tree/rust-hir-item.h
+++ b/gcc/rust/hir/tree/rust-hir-item.h
@@ -1009,6 +1009,8 @@ protected:
   }
 };
 
+std::string enum_to_str (UseTreeRebind::NewBindType);
+
 // Rust use declaration (i.e. for modules) HIR node
 class UseDeclaration : public VisItem
 {
diff --git a/gcc/rust/hir/tree/rust-hir-type.h b/gcc/rust/hir/tree/rust-hir-type.h
index 08a389e..37d108e 100644
--- a/gcc/rust/hir/tree/rust-hir-type.h
+++ b/gcc/rust/hir/tree/rust-hir-type.h
@@ -750,6 +750,8 @@ public:
   Identifier get_name () const { return name; }
 };
 
+std::string enum_to_str (MaybeNamedParam::ParamKind);
+
 /* A function pointer type - can be created via coercion from function items and
  * non- capturing closures. */
 class BareFunctionType : public TypeNoBounds
diff --git a/gcc/rust/hir/tree/rust-hir.cc b/gcc/rust/hir/tree/rust-hir.cc
index 276c1a7..6e626c6 100644
--- a/gcc/rust/hir/tree/rust-hir.cc
+++ b/gcc/rust/hir/tree/rust-hir.cc
@@ -3670,6 +3670,36 @@ MaybeNamedParam::as_string () const
   return str;
 }
 
+std::string
+enum_to_str (MaybeNamedParam::ParamKind pk)
+{
+  switch (pk)
+    {
+    case MaybeNamedParam::ParamKind::UNNAMED:
+      return "UNNAMED";
+    case MaybeNamedParam::ParamKind::IDENTIFIER:
+      return "IDENTIFIER";
+    case MaybeNamedParam::ParamKind::WILDCARD:
+      return "WILDCARD";
+    }
+  gcc_unreachable ();
+}
+
+std::string
+enum_to_str (UseTreeRebind::NewBindType nbt)
+{
+  switch (nbt)
+    {
+    case UseTreeRebind::NewBindType::NONE:
+      return "NONE";
+    case UseTreeRebind::NewBindType::IDENTIFIER:
+      return "IDENTIFIER";
+    case UseTreeRebind::NewBindType::WILDCARD:
+      return "WILDCARD";
+    }
+  gcc_unreachable ();
+}
+
 /* Override that calls the function recursively on all items contained within
  * the module. */
 void