From 6fc1fff9dc6ef6432c02e6474a2c3b24b05a6c32 Mon Sep 17 00:00:00 2001
From: Roland Conybeare <rconybeare@gmail.com>
Date: Tue, 18 Jun 2024 17:15:08 -0400
Subject: [PATCH] xo-reflect: + TypeDescr::lookup_by_name()

---
 include/xo/reflect/TypeDescr.hpp |  2 ++
 src/reflect/TypeDescr.cpp        | 13 +++++++++++++
 2 files changed, 15 insertions(+)

diff --git a/include/xo/reflect/TypeDescr.hpp b/include/xo/reflect/TypeDescr.hpp
index a0c307b..cd59697 100644
--- a/include/xo/reflect/TypeDescr.hpp
+++ b/include/xo/reflect/TypeDescr.hpp
@@ -190,6 +190,8 @@ namespace xo {
                                       std::unique_ptr<TypeDescrExtra> tdextra);
 
             /* print table of reflected types to os */
+            /** lookup type by canonical name **/
+            static TypeDescr lookup_by_name(const std::string & canonical_name);
             static void print_reflected_types(std::ostream & os);
 
             TypeId id() const { return id_; }
diff --git a/src/reflect/TypeDescr.cpp b/src/reflect/TypeDescr.cpp
index c541ea0..7c2eb19 100644
--- a/src/reflect/TypeDescr.cpp
+++ b/src/reflect/TypeDescr.cpp
@@ -146,6 +146,19 @@ namespace xo {
             return new_slot.get();
         } /*require*/
 
+        TypeDescr
+        TypeDescrBase::lookup_by_name(const std::string & name) {
+            auto ix = s_canonical_type_table_map.find(name);
+
+            if (ix == s_canonical_type_table_map.end()) {
+                throw std::runtime_error(tostr("TypeDescrBase::lookup_by_name"
+                                               ": no registered type with canonical name T",
+                                               xtag("T", name)));
+            }
+
+            return ix->second;
+        } /*lookup_by_name*/
+
         void
         TypeDescrBase::print_reflected_types(std::ostream & os)
         {