From a6954fd7bcf0ccf5cbc3f98405a8e70019b92953 Mon Sep 17 00:00:00 2001
From: Ivan Pelipenko <peri4ko@yandex.ru>
Date: Tue, 3 Nov 2020 13:08:18 +0300
Subject: [PATCH] PIEvaluator::usedVariables() now returns without i, pi, e

---
 libs/main/math/pievaluator.cpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libs/main/math/pievaluator.cpp b/libs/main/math/pievaluator.cpp
index 87414136..ebd42eed 100644
--- a/libs/main/math/pievaluator.cpp
+++ b/libs/main/math/pievaluator.cpp
@@ -343,6 +343,9 @@ void PIEvaluator::findUnknownVariables() {
 	if (cvar.length() > 0) unknownVars << cvar;
 	unknownVars.removeDuplicates();
 	usedVars.removeDuplicates();
+	usedVars.removeOne("i");
+	usedVars.removeOne("pi");
+	usedVars.removeOne("e");
 }