From 0e734cb3b6ee3c21cafb2b076eaf6167ae5e33d2 Mon Sep 17 00:00:00 2001
From: ToruNiina <niina.toru.68u@gmail.com>
Date: Fri, 7 Feb 2025 00:49:26 +0900
Subject: [PATCH] feat: add syntax for each escape seqs

---
 include/toml11/fwd/syntax_fwd.hpp   |  4 ++++
 include/toml11/impl/syntax_impl.hpp | 23 ++++++++++++++++++-----
 2 files changed, 22 insertions(+), 5 deletions(-)

diff --git a/include/toml11/fwd/syntax_fwd.hpp b/include/toml11/fwd/syntax_fwd.hpp
index 3560821..80bcc29 100644
--- a/include/toml11/fwd/syntax_fwd.hpp
+++ b/include/toml11/fwd/syntax_fwd.hpp
@@ -226,6 +226,10 @@ sequence offset_datetime(const spec& s);
 // ===========================================================================
 // String
 
+sequence escaped_x2(const spec& s);
+sequence escaped_u4(const spec& s);
+sequence escaped_U8(const spec& s);
+
 sequence escaped(const spec& s);
 
 either basic_char(const spec& s);
diff --git a/include/toml11/impl/syntax_impl.hpp b/include/toml11/impl/syntax_impl.hpp
index f5180f3..638a7de 100644
--- a/include/toml11/impl/syntax_impl.hpp
+++ b/include/toml11/impl/syntax_impl.hpp
@@ -398,6 +398,19 @@ TOML11_INLINE sequence offset_datetime(const spec& s)
 // ===========================================================================
 // String
 
+TOML11_INLINE sequence escaped_x2(const spec& s)
+{
+    return sequence(character('x'), repeat_exact(2, hexdig(s)));
+}
+TOML11_INLINE sequence escaped_u4(const spec& s)
+{
+    return sequence(character('u'), repeat_exact(4, hexdig(s)));
+}
+TOML11_INLINE sequence escaped_U8(const spec& s)
+{
+    return sequence(character('U'), repeat_exact(8, hexdig(s)));
+}
+
 TOML11_INLINE sequence escaped(const spec& s)
 {
     const auto escape_char = [&s] {
@@ -416,17 +429,17 @@ TOML11_INLINE sequence escaped(const spec& s)
         {
             return either(
                 escape_char(),
-                sequence(character('u'), repeat_exact(4, hexdig(s))),
-                sequence(character('U'), repeat_exact(8, hexdig(s))),
-                sequence(character('x'), repeat_exact(2, hexdig(s)))
+                escaped_u4(s),
+                escaped_U8(s),
+                escaped_x2(s)
             );
         }
         else
         {
             return either(
                 escape_char(),
-                sequence(character('u'), repeat_exact(4, hexdig(s))),
-                sequence(character('U'), repeat_exact(8, hexdig(s)))
+                escaped_u4(s),
+                escaped_U8(s)
             );
         }
     };