[gcc r14-7642] gccrs: ast: dump literals correctly

[Arthur Cohen]

https://gcc.gnu.org/g:d4ac20b6b426f92d536806ecbb05722570a2e605

commit r14-7642-gd4ac20b6b426f92d536806ecbb05722570a2e605
Author: Charalampos Mitrodimas <charmitro@gmail.com>
Date:   Sat Jun 3 18:09:26 2023 +0000

    gccrs: ast: dump literals correctly
    
    This commit fixes printing of literals based on their
    type.
    
    Previous implementation printed literals the same, regardless
    their type. Now we are printing:
      * int, float, bool don't require special printing
      * char        -> '<char>'
      * string      -> "<string>"
      * byte        -> b'<byte>'
      * byte_string -> b"<byte_string>"
    
    gcc/rust/ChangeLog:
    
            * ast/rust-ast-dump.cc (Dump::visit):
            print literals based on their type.
    
    Signed-off-by: Charalampos Mitrodimas <charmitro@gmail.com>

Diff:
---
 gcc/rust/ast/rust-ast-dump.cc | 29 ++++++++++++++++++++++++++++-
 1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/gcc/rust/ast/rust-ast-dump.cc b/gcc/rust/ast/rust-ast-dump.cc
index f44bb07c915..d486b1deb8b 100644
--- a/gcc/rust/ast/rust-ast-dump.cc
+++ b/gcc/rust/ast/rust-ast-dump.cc
@@ -507,7 +507,34 @@ Dump::visit (QualifiedPathInType &path)
 void
 Dump::visit (LiteralExpr &expr)
 {
-  stream << expr.as_string ();
+  switch (expr.get_lit_type ())
+    {
+    case Literal::CHAR:
+      stream << "'" << expr.as_string () << "'";
+      return;
+
+    case Literal::STRING:
+      stream << "\"" << expr.as_string () << "\"";
+      return;
+
+    case Literal::BYTE:
+      stream << "b'" << expr.as_string () << "'";
+      return;
+
+    case Literal::BYTE_STRING:
+      stream << "b\"" << expr.as_string () << "\"";
+      return;
+
+    case Literal::INT:
+    case Literal::FLOAT:
+    case Literal::BOOL:
+      stream << expr.as_string ();
+      return;
+
+    case Literal::ERROR:
+      stream << "/*ERROR*/";
+      return;
+    }
 }
 
 void