gccrs: Make default resolver inherit from default visitor

The default resolver put some scope in place but mostly has traversal
functions similar to the default ast visitor, making it inherit from the
default visitor allows us to avoid code duplication.

gcc/rust/ChangeLog:

	* resolve/rust-default-resolver.cc (DefaultResolver::visit): Remove
	duplicated functions.
	* resolve/rust-default-resolver.h (class DefaultResolver): Make the
	default resolver inherit from the default visitor.

Signed-off-by: Pierre-Emmanuel Patry <pierre-emmanuel.patry@embecosm.com>

2 files changed, 5 insertions, 279 deletions

diff --git a/gcc/rust/resolve/rust-default-resolver.cc b/gcc/rust/resolve/rust-default-resolver.cc
index c1ed3ce..ab4d5e8 100644
--- a/gcc/rust/resolve/rust-default-resolver.cc
+++ b/gcc/rust/resolve/rust-default-resolver.cc
@@ -18,6 +18,7 @@
 
 #include "rust-default-resolver.h"
 #include "rust-ast-full.h"
+#include "rust-ast-visitor.h"
 #include "rust-item.h"
 
 namespace Rust {
@@ -148,27 +149,12 @@ DefaultResolver::visit (AST::StructStruct &type)
   // we also can't visit `StructField`s by default, so there's nothing to do -
   // correct? or should we do something like
 
-  for (auto &field : type.get_fields ())
-    field.get_field_type ()->accept_vis (*this);
+  AST::DefaultASTVisitor::visit (type);
 
   // FIXME: ???
 }
 
 void
-DefaultResolver::visit (AST::TupleStruct &type)
-{
-  for (auto &field : type.get_fields ())
-    field.get_field_type ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::Union &type)
-{
-  for (auto &field : type.get_variants ())
-    field.get_field_type ()->accept_vis (*this);
-}
-
-void
 DefaultResolver::visit (AST::Enum &type)
 {
   // FIXME: Do we need to scope anything by default?
@@ -183,118 +169,6 @@ DefaultResolver::visit (AST::Enum &type)
 }
 
 void
-DefaultResolver::visit (AST::BorrowExpr &expr)
-{
-  expr.get_borrowed_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::DereferenceExpr &expr)
-{
-  expr.get_dereferenced_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ErrorPropagationExpr &expr)
-{
-  expr.get_propagating_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::NegationExpr &expr)
-{
-  expr.get_negated_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ArithmeticOrLogicalExpr &expr)
-{
-  expr.get_left_expr ()->accept_vis (*this);
-  expr.get_right_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ComparisonExpr &expr)
-{
-  expr.get_left_expr ()->accept_vis (*this);
-  expr.get_right_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::LazyBooleanExpr &expr)
-{
-  expr.get_left_expr ()->accept_vis (*this);
-  expr.get_right_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::TypeCastExpr &expr)
-{
-  expr.get_type_to_cast_to ()->accept_vis (*this);
-  expr.get_casted_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::AssignmentExpr &expr)
-{
-  expr.get_left_expr ()->accept_vis (*this);
-  expr.get_right_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::CompoundAssignmentExpr &expr)
-{
-  expr.get_left_expr ()->accept_vis (*this);
-  expr.get_right_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::GroupedExpr &expr)
-{
-  expr.get_expr_in_parens ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ArrayElemsValues &array)
-{
-  for (auto &value : array.get_values ())
-    value->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ArrayElemsCopied &array)
-{
-  array.get_elem_to_copy ()->accept_vis (*this);
-  array.get_num_copies ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ArrayExpr &expr)
-{
-  expr.get_array_elems ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ArrayIndexExpr &expr)
-{
-  expr.get_array_expr ()->accept_vis (*this);
-  expr.get_index_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::TupleExpr &expr)
-{
-  for (auto &element : expr.get_tuple_elems ())
-    element->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::TupleIndexExpr &expr)
-{
-  expr.get_tuple_expr ()->accept_vis (*this);
-}
-
-void
 DefaultResolver::visit (AST::StructExprFieldIdentifierValue &)
 {}
 
@@ -303,28 +177,6 @@ DefaultResolver::visit (AST::StructExprFieldIndexValue &)
 {}
 
 void
-DefaultResolver::visit (AST::CallExpr &expr)
-{
-  expr.get_function_expr ()->accept_vis (*this);
-  for (auto &param : expr.get_params ())
-    param->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::MethodCallExpr &expr)
-{
-  expr.get_receiver_expr ()->accept_vis (*this);
-  for (auto &param : expr.get_params ())
-    param->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::FieldAccessExpr &expr)
-{
-  expr.get_receiver_expr ()->accept_vis (*this);
-}
-
-void
 DefaultResolver::visit (AST::ClosureExprInner &)
 {}
 
@@ -337,13 +189,6 @@ DefaultResolver::visit (AST::ContinueExpr &expr)
 {}
 
 void
-DefaultResolver::visit (AST::BreakExpr &expr)
-{
-  if (expr.has_break_expr ())
-    expr.get_break_expr ()->accept_vis (*this);
-}
-
-void
 DefaultResolver::visit (AST::RangeFromToExpr &expr)
 {}
 
@@ -356,10 +201,6 @@ DefaultResolver::visit (AST::RangeToExpr &expr)
 {}
 
 void
-DefaultResolver::visit (AST::RangeFullExpr &expr)
-{}
-
-void
 DefaultResolver::visit (AST::RangeFromToInclExpr &expr)
 {}
 
@@ -416,28 +257,6 @@ DefaultResolver::visit (AST::AsyncBlockExpr &expr)
 {}
 
 void
-DefaultResolver::visit (AST::LetStmt &let_stmt)
-{
-  let_stmt.get_pattern ()->accept_vis (*this);
-
-  if (let_stmt.has_type ())
-    let_stmt.get_type ()->accept_vis (*this);
-
-  if (let_stmt.has_init_expr ())
-    let_stmt.get_init_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::ExprStmt &stmt)
-{
-  stmt.get_expr ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::Token &)
-{}
-
-void
 DefaultResolver::visit (AST::DelimTokenTree &)
 {}
 
@@ -450,10 +269,6 @@ DefaultResolver::visit (AST::IdentifierExpr &expr)
 {}
 
 void
-DefaultResolver::visit (AST::Lifetime &)
-{}
-
-void
 DefaultResolver::visit (AST::LifetimeParam &)
 {}
 
@@ -466,10 +281,6 @@ DefaultResolver::visit (AST::PathInExpression &)
 {}
 
 void
-DefaultResolver::visit (AST::TypePathSegment &)
-{}
-
-void
 DefaultResolver::visit (AST::TypePathSegmentGeneric &)
 {}
 
@@ -514,10 +325,6 @@ DefaultResolver::visit (AST::StructExprStruct &)
 {}
 
 void
-DefaultResolver::visit (AST::StructExprFieldIdentifier &)
-{}
-
-void
 DefaultResolver::visit (AST::StructExprStructFields &)
 {}
 
@@ -624,10 +431,6 @@ DefaultResolver::visit (AST::ExternalFunctionItem &)
 {}
 
 void
-DefaultResolver::visit (AST::MacroMatchFragment &)
-{}
-
-void
 DefaultResolver::visit (AST::MacroMatchRepetition &)
 {}
 
@@ -652,14 +455,6 @@ DefaultResolver::visit (AST::MetaItemSeq &)
 {}
 
 void
-DefaultResolver::visit (AST::MetaWord &)
-{}
-
-void
-DefaultResolver::visit (AST::MetaNameValueStr &)
-{}
-
-void
 DefaultResolver::visit (AST::MetaListPaths &)
 {}
 
@@ -668,29 +463,6 @@ DefaultResolver::visit (AST::MetaListNameValueStr &)
 {}
 
 void
-DefaultResolver::visit (AST::LiteralPattern &)
-{}
-
-void
-DefaultResolver::visit (AST::IdentifierPattern &pattern)
-{
-  if (pattern.has_pattern_to_bind ())
-    pattern.get_pattern_to_bind ()->accept_vis (*this);
-}
-
-void
-DefaultResolver::visit (AST::WildcardPattern &)
-{}
-
-void
-DefaultResolver::visit (AST::RestPattern &)
-{}
-
-void
-DefaultResolver::visit (AST::RangePatternBoundLiteral &)
-{}
-
-void
 DefaultResolver::visit (AST::RangePatternBoundPath &)
 {}
 
@@ -791,10 +563,6 @@ DefaultResolver::visit (AST::TupleType &)
 {}
 
 void
-DefaultResolver::visit (AST::NeverType &)
-{}
-
-void
 DefaultResolver::visit (AST::RawPointerType &)
 {}
 
@@ -811,10 +579,6 @@ DefaultResolver::visit (AST::SliceType &)
 {}
 
 void
-DefaultResolver::visit (AST::InferredType &)
-{}
-
-void
 DefaultResolver::visit (AST::BareFunctionType &)
 {}
 
diff --git a/gcc/rust/resolve/rust-default-resolver.h b/gcc/rust/resolve/rust-default-resolver.h
index 49255d3..20dbff8 100644
--- a/gcc/rust/resolve/rust-default-resolver.h
+++ b/gcc/rust/resolve/rust-default-resolver.h
@@ -32,9 +32,11 @@ namespace Resolver2_0 {
  * visiting each node's subnodes - a block's statements, a function call's
  * arguments...
  */
-class DefaultResolver : public AST::ASTVisitor
+class DefaultResolver : public AST::DefaultASTVisitor
 {
 public:
+  using AST::DefaultASTVisitor::visit;
+
   virtual ~DefaultResolver () {}
 
   // First, our lexical scope expressions - these visit their sub nodes, always
@@ -51,41 +53,17 @@ public:
 
   // type dec nodes, which visit their fields or variants by default
   void visit (AST::StructStruct &);
-  void visit (AST::TupleStruct &);
-  void visit (AST::Union &);
   void visit (AST::Enum &);
 
   // Visitors that visit their expression node(s)
-  void visit (AST::BorrowExpr &);
-  void visit (AST::DereferenceExpr &);
-  void visit (AST::ErrorPropagationExpr &);
-  void visit (AST::NegationExpr &);
-  void visit (AST::ArithmeticOrLogicalExpr &);
-  void visit (AST::ComparisonExpr &);
-  void visit (AST::LazyBooleanExpr &);
-  void visit (AST::TypeCastExpr &);
-  void visit (AST::AssignmentExpr &);
-  void visit (AST::CompoundAssignmentExpr &);
-  void visit (AST::GroupedExpr &);
-  void visit (AST::ArrayElemsValues &);
-  void visit (AST::ArrayElemsCopied &);
-  void visit (AST::ArrayExpr &);
-  void visit (AST::ArrayIndexExpr &);
-  void visit (AST::TupleExpr &);
-  void visit (AST::TupleIndexExpr &);
   void visit (AST::StructExprFieldIdentifierValue &);
   void visit (AST::StructExprFieldIndexValue &);
-  void visit (AST::CallExpr &);
-  void visit (AST::MethodCallExpr &);
-  void visit (AST::FieldAccessExpr &);
   void visit (AST::ClosureExprInner &);
   void visit (AST::ClosureExprInnerTyped &);
   void visit (AST::ContinueExpr &);
-  void visit (AST::BreakExpr &);
   void visit (AST::RangeFromToExpr &);
   void visit (AST::RangeFromExpr &);
   void visit (AST::RangeToExpr &);
-  void visit (AST::RangeFullExpr &);
   void visit (AST::RangeFromToInclExpr &);
   void visit (AST::RangeToInclExpr &);
   void visit (AST::ReturnExpr &);
@@ -100,19 +78,14 @@ public:
   void visit (AST::MatchExpr &);
   void visit (AST::AwaitExpr &);
   void visit (AST::AsyncBlockExpr &);
-  void visit (AST::LetStmt &);
-  void visit (AST::ExprStmt &);
 
   // Leaf visitors, which do nothing by default
-  void visit (AST::Token &);
   void visit (AST::DelimTokenTree &);
   void visit (AST::AttrInputMetaItemContainer &);
   void visit (AST::IdentifierExpr &);
-  void visit (AST::Lifetime &);
   void visit (AST::LifetimeParam &);
   void visit (AST::ConstGenericParam &);
   void visit (AST::PathInExpression &);
-  void visit (AST::TypePathSegment &);
   void visit (AST::TypePathSegmentGeneric &);
   void visit (AST::TypePathSegmentFunction &);
   void visit (AST::TypePath &);
@@ -124,7 +97,6 @@ public:
   void visit (AST::MetaItemLitExpr &);
   void visit (AST::MetaItemPathLit &);
   void visit (AST::StructExprStruct &);
-  void visit (AST::StructExprFieldIdentifier &);
   void visit (AST::StructExprStructFields &);
   void visit (AST::StructExprStructBase &);
   void visit (AST::TypeParam &);
@@ -149,22 +121,14 @@ public:
   void visit (AST::ExternalTypeItem &);
   void visit (AST::ExternalStaticItem &);
   void visit (AST::ExternalFunctionItem &);
-  void visit (AST::MacroMatchFragment &);
   void visit (AST::MacroMatchRepetition &);
   void visit (AST::MacroMatcher &);
   void visit (AST::MacroRulesDefinition &);
   void visit (AST::MacroInvocation &);
   void visit (AST::MetaItemPath &);
   void visit (AST::MetaItemSeq &);
-  void visit (AST::MetaWord &);
-  void visit (AST::MetaNameValueStr &);
   void visit (AST::MetaListPaths &);
   void visit (AST::MetaListNameValueStr &);
-  void visit (AST::LiteralPattern &);
-  void visit (AST::IdentifierPattern &);
-  void visit (AST::WildcardPattern &);
-  void visit (AST::RestPattern &);
-  void visit (AST::RangePatternBoundLiteral &);
   void visit (AST::RangePatternBoundPath &);
   void visit (AST::RangePatternBoundQualPath &);
   void visit (AST::RangePattern &);
@@ -190,12 +154,10 @@ public:
   void visit (AST::ImplTraitTypeOneBound &);
   void visit (AST::TraitObjectTypeOneBound &);
   void visit (AST::TupleType &);
-  void visit (AST::NeverType &);
   void visit (AST::RawPointerType &);
   void visit (AST::ReferenceType &);
   void visit (AST::ArrayType &);
   void visit (AST::SliceType &);
-  void visit (AST::InferredType &);
   void visit (AST::BareFunctionType &);
   void visit (AST::FunctionParam &);
   void visit (AST::VariadicParam &);