From fce0fea1cbdd86df5a27892e14044ad13a4179bd Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Tue, 6 Aug 2024 04:35:26 -0400
Subject: [PATCH] xo-expression: + Expression.assign_valuetype()

---
 include/xo/expression/Expression.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/xo/expression/Expression.hpp b/include/xo/expression/Expression.hpp
index cbea3a35..3e9137c4 100644
--- a/include/xo/expression/Expression.hpp
+++ b/include/xo/expression/Expression.hpp
@@ -92,6 +92,10 @@ namespace xo {
             /** human-readable string representation **/
             virtual std::string display_string() const;
 
+        protected:
+            /** useful when scaffolding expressions in a parser **/
+            void assign_valuetype(TypeDescr x) { valuetype_ = x; }
+
         private:
             /** expression type (constant | apply | ..) for this expression **/
             exprtype extype_ = exprtype::invalid;