From ca9edac951a142d9d66a695038e9ec06f92833ca Mon Sep 17 00:00:00 2001
From: Tom Russo <russo@bogodyn.org>
Date: Wed, 14 Feb 2024 22:22:55 -0700
Subject: [PATCH] Fix missing sstream include

src/c_boost/expr/ast_common.hpp makes use of std::istringstream, but
does not include <sstream>.

Some boost header must have silently pulled in sstream, but as of
boost 1.84 that no longer happens.  Trying to build XDM with boost
1.84 fails as a result.

This commit makes ast_common.hpp include <sstream> itself, and that
fixes the problem.
---
 src/c_boost/expr/ast_common.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/c_boost/expr/ast_common.hpp b/src/c_boost/expr/ast_common.hpp
index 126ee9c..ab672fc 100755
--- a/src/c_boost/expr/ast_common.hpp
+++ b/src/c_boost/expr/ast_common.hpp
@@ -44,6 +44,7 @@ const double M_PI = boost::math::constants::pi<double>();
 #include <random>
 #include <string>
 #include <unordered_map>
+#include <sstream>
 
 #include "boost_expr_parser_common.h"