From 9f7d6a21dcc2c08e8f9b74a1946cf54f8bf7be09 Mon Sep 17 00:00:00 2001
From: Andrey Semashev <andrey.semashev@gmail.com>
Date: Sun, 26 Feb 2023 04:45:30 +0300
Subject: [PATCH] Fix redundant trailing parenthesis after noexcept with
 condition.

Fixes https://github.com/boostorg/boostbook/issues/20.
---
 test/doxygen/autodoc.gold         | 2 +-
 xsl/doxygen/doxygen2boostbook.xsl | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/doxygen/autodoc.gold b/test/doxygen/autodoc.gold
index 58434b1..9b93c61 100644
--- a/test/doxygen/autodoc.gold
+++ b/test/doxygen/autodoc.gold
@@ -32,7 +32,7 @@
 <method name="const_method" cv="const"><type>void</type></method>
 <method name="volatile_method" cv="volatile"><type>void</type></method>
 <method name="trad_noexcept" cv="noexcept"><type>void</type></method>
-<method name="trad_noexcept_if" cv="noexcept(a==b &amp;&amp;(c||d)))"><type>void</type></method>
+<method name="trad_noexcept_if" cv="noexcept(a==b &amp;&amp;(c||d))"><type>void</type></method>
 <method name="boost_noexcept" cv="noexcept"><type>void</type></method>
 <method name="boost_noexcept_if" cv="noexcept(condition)"><type>void</type></method>
 <method name="trad_constexpr" cv="constexpr"><type>void</type></method>
diff --git a/xsl/doxygen/doxygen2boostbook.xsl b/xsl/doxygen/doxygen2boostbook.xsl
index 5d68930..7e07b0e 100644
--- a/xsl/doxygen/doxygen2boostbook.xsl
+++ b/xsl/doxygen/doxygen2boostbook.xsl
@@ -1156,7 +1156,7 @@
       <xsl:when test="string-length($trailing)">
         <xsl:value-of select="concat(
             'noexcept(',
-            substring($condition, 1, string-length($condition) - string-length($trailing)),
+            substring($condition, 1, string-length($condition) - string-length($trailing) - 1),
             ') ')" />
       </xsl:when>
       <xsl:otherwise>