CountCharacters can be const so it is now.

2 files changed, 2 insertions, 2 deletions

diff --git a/src/Document.cxx b/src/Document.cxx
index 4d2c48f1f..d0909b808 100644
--- a/src/Document.cxx
+++ b/src/Document.cxx
@@ -1306,7 +1306,7 @@ int Document::GetColumn(int pos) {
 	return column;
 }
 
-int Document::CountCharacters(int startPos, int endPos) {
+int Document::CountCharacters(int startPos, int endPos) const {
 	startPos = MovePositionOutsideChar(startPos, 1, false);
 	endPos = MovePositionOutsideChar(endPos, -1, false);
 	int count = 0;
diff --git a/src/Document.h b/src/Document.h
index 477b4dc60..e808bb37f 100644
--- a/src/Document.h
+++ b/src/Document.h
@@ -321,7 +321,7 @@ public:
 	int SetLineIndentation(int line, int indent);
 	int GetLineIndentPosition(int line) const;
 	int GetColumn(int position);
-	int CountCharacters(int startPos, int endPos);
+	int CountCharacters(int startPos, int endPos) const;
 	int FindColumn(int line, int column);
 	void Indent(bool forwards, int lineBottom, int lineTop);
 	static std::string TransformLineEnds(const char *s, size_t len, int eolModeWanted);