gccrs: Rename get_pattern_to_bind to get_subpattern

gcc/rust/ChangeLog:

	* ast/rust-ast-collector.cc: Rename get_pattern_to_bind to get_subpattern
	* ast/rust-ast-visitor.cc: Ditto.
	* ast/rust-pattern.h: Ditto.
	* expand/rust-cfg-strip.cc: Ditto.
	* hir/rust-ast-lower-pattern.cc: Ditto.

Signed-off-by: Yap Zhi Heng <yapzhhg@gmail.com>

Author: Polygonalr

gcc/rust/ast/rust-ast-collector.cc

@@ -2485,7 +2485,7 @@ TokenCollector::visit (IdentifierPattern &pattern)
   if (pattern.has_subpattern ())
     {
       push (Rust::Token::make (PATTERN_BIND, UNDEF_LOCATION));
-      visit (pattern.get_pattern_to_bind ());
+      visit (pattern.get_subpattern ());
     }
 }
 

gcc/rust/ast/rust-ast-visitor.cc

@@ -1200,7 +1200,7 @@ void
 DefaultASTVisitor::visit (AST::IdentifierPattern &pattern)
 {
   if (pattern.has_subpattern ())
-    visit (pattern.get_pattern_to_bind ());
+    visit (pattern.get_subpattern ());
 }
 
 void

gcc/rust/ast/rust-pattern.h

@@ -137,8 +137,7 @@ class IdentifierPattern : public Pattern
 
   void accept_vis (ASTVisitor &vis) override;
 
-  // TODO: is this better? Or is a "vis_pattern" better?
-  Pattern &get_pattern_to_bind ()
+  Pattern &get_subpattern ()
   {
     rust_assert (has_subpattern ());
     return *subpattern;

gcc/rust/expand/rust-cfg-strip.cc

@@ -2267,7 +2267,7 @@ CfgStrip::visit (AST::IdentifierPattern &pattern)
 
   AST::DefaultASTVisitor::visit (pattern);
 
-  auto &sub_pattern = pattern.get_pattern_to_bind ();
+  auto &sub_pattern = pattern.get_subpattern ();
   if (sub_pattern.is_marked_for_strip ())
     rust_error_at (sub_pattern.get_locus (),
 		   "cannot strip pattern in this position");

gcc/rust/hir/rust-ast-lower-pattern.cc

@@ -53,7 +53,7 @@ ASTLoweringPattern::visit (AST::IdentifierPattern &pattern)
   if (pattern.has_subpattern ())
     {
       subpattern = std::unique_ptr<Pattern> (
-	ASTLoweringPattern::translate (pattern.get_pattern_to_bind ()));
+	ASTLoweringPattern::translate (pattern.get_subpattern ()));
     }
   translated
     = new HIR::IdentifierPattern (mapping, pattern.get_ident (),