LineAndColumn::operator+= is not constexpr

1 files changed, 1 insertions, 1 deletions

diff --git a/src/line_and_column.hh b/src/line_and_column.hh
index aaffb222..5194dca2 100644
--- a/src/line_and_column.hh
+++ b/src/line_and_column.hh
@@ -20,7 +20,7 @@ struct LineAndColumn
         return EffectiveType(line + other.line, column + other.column);
     }
 
-    constexpr EffectiveType& operator+=(const EffectiveType& other)
+    EffectiveType& operator+=(const EffectiveType& other)
     {
         line   += other.line;
         column += other.column;