From e82f71d174886c7106ce9ea3ee32f07fac365bed Mon Sep 17 00:00:00 2001
From: Doug Torrance <dtorrance@piedmont.edu>
Date: Tue, 6 Aug 2024 15:00:00 -0400
Subject: [PATCH] Add toExternalString(MutableMatrix)

We just use the same method as we use for mutable lists and hash
tables.
---
 M2/Macaulay2/m2/mutablemat.m2 | 1 +
 1 file changed, 1 insertion(+)

diff --git a/M2/Macaulay2/m2/mutablemat.m2 b/M2/Macaulay2/m2/mutablemat.m2
index ab0f0169c57..29fa7404833 100644
--- a/M2/Macaulay2/m2/mutablemat.m2
+++ b/M2/Macaulay2/m2/mutablemat.m2
@@ -16,6 +16,7 @@ precision MutableMatrix := precision @@ ring
 expression MutableMatrix := m -> MatrixExpression append(applyTable(entries m, expression), symbol MutableMatrix => true)
 texMath MutableMatrix := m -> texMath expression m
 net MutableMatrix := m -> net expression m
+toExternalString MutableMatrix := lookup(toExternalString, MutableHashTable)
 
 map(Ring,RawMutableMatrix) := opts -> (R,m) -> (
      new MutableMatrix from {