From d03a02d3e5ade46c73a40084c7fc6d9631d2b988 Mon Sep 17 00:00:00 2001
From: Charles Baker <charles.baker@sweetsoftware.co.nz>
Date: Mon, 29 May 2023 21:19:24 +1200
Subject: [PATCH] Use correct string for lexeme when debugging parsers

This works for UTF-8 encoded strings but debugging will fail when using
UTF-16 or UTF-32 as the printf() formatted string won't deal with null
characters embedded within the wider character encodings.

Committing this for now because it doesn't break any existing
functionality but does enable parsing of wider character inputs.
---
 src/lalr/Parser.ipp | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/lalr/Parser.ipp b/src/lalr/Parser.ipp
index 30f5670..dad237c 100644
--- a/src/lalr/Parser.ipp
+++ b/src/lalr/Parser.ipp
@@ -494,7 +494,7 @@ void Parser<Iterator, UserData, Char, Traits, Allocator>::debug_shift( const Par
     if ( debug_enabled_ )
     {
         const ParserSymbol* symbol = node.symbol();
-        const std::string& lexeme = node.lexeme();
+        const std::basic_string<Char, Traits, Allocator>& lexeme = node.lexeme();
         int line = node.line();
         int column = node.column();
         fire_printf( "SHIFT: (%s %s %d:%d)\n", symbol ? symbol->identifier : "", lexeme.c_str(), line, column );
@@ -521,14 +521,14 @@ void Parser<Iterator, UserData, Char, Traits, Allocator>::debug_reduce( const Pa
 
     if ( debug_enabled_ )
     {
-        fire_printf( "REDUCE: %s <- ", reduced_symbol->identifier );        
+        fire_printf( "REDUCE: %s <- ", reduced_symbol->identifier );
 
         const ParserNode* node = nodes_.data() + start;
         const ParserNode* node_end = nodes_.data() + finish;
         if ( node != node_end )
         {
             const ParserSymbol* symbol = node->symbol();
-            const std::string& lexeme = node->lexeme();
+            const std::basic_string<Char, Traits, Allocator>& lexeme = node->lexeme();
             int line = node->line();
             int column = node->column();
             fire_printf( "(%s %s %d:%d)", symbol ? symbol->identifier : "", lexeme.c_str(), line, column );
@@ -538,7 +538,7 @@ void Parser<Iterator, UserData, Char, Traits, Allocator>::debug_reduce( const Pa
         while ( node != node_end )
         {
             const ParserSymbol* symbol = node->symbol();
-            const std::string& lexeme = node->lexeme();
+            const std::basic_string<Char, Traits, Allocator>& lexeme = node->lexeme();
             int line = node->line();
             int column = node->column();
             fire_printf( " (%s %s %d:%d)", symbol ? symbol->identifier : "", lexeme.c_str(), line, column );