From 75c29c03787cb2a65e53329e197891e52f9afff0 Mon Sep 17 00:00:00 2001
From: Zach Laine <whatwasthataddress@gmail.com>
Date: Sun, 29 Sep 2024 13:28:17 -0500
Subject: [PATCH] Add missing implementations for hidden friends in
 project_view::iterator (op== and op-).

Fixes #169.
---
 include/boost/parser/detail/text/transcode_view.hpp | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/include/boost/parser/detail/text/transcode_view.hpp b/include/boost/parser/detail/text/transcode_view.hpp
index e6e34901..a25530d2 100644
--- a/include/boost/parser/detail/text/transcode_view.hpp
+++ b/include/boost/parser/detail/text/transcode_view.hpp
@@ -176,21 +176,24 @@ namespace boost::parser::detail { namespace text {
             requires std::sentinel_for<sentinel_type, std::ranges::iterator_t<detail::maybe_const<OtherConst, V>>>
 #endif
         friend constexpr bool operator==(const iterator<OtherConst> & x,
-                                         const sentinel & y);
+                                         const sentinel & y)
+            { return x.it_ == y.end_; }
 
         template<bool OtherConst>
 #if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
             requires std::sized_sentinel_for<sentinel_type, std::ranges::iterator_t<detail::maybe_const<OtherConst, V>>>
 #endif
         friend constexpr detail::range_difference_t<detail::maybe_const<OtherConst, V>>
-        operator-(const iterator<OtherConst> & x, const sentinel & y);
+        operator-(const iterator<OtherConst> & x, const sentinel & y)
+           { return x.it_ - y.end_; }
 
         template<bool OtherConst>
 #if BOOST_PARSER_DETAIL_TEXT_USE_CONCEPTS
             requires std::sized_sentinel_for<sentinel_type, std::ranges::iterator_t<detail::maybe_const<OtherConst, V>>>
 #endif
         friend constexpr detail::range_difference_t<detail::maybe_const<OtherConst, V>>
-        operator-(const sentinel & y, const iterator<OtherConst> & x);
+        operator-(const sentinel & y, const iterator<OtherConst> & x)
+            { return y.end_ - x.it_; }
 
     public:
         constexpr iterator() = default;