From 4be9b409de4358b7114e7c00719bf6cbc7267e5a Mon Sep 17 00:00:00 2001
From: chriseth <chris@ethereum.org>
Date: Thu, 3 Dec 2020 15:03:06 +0100
Subject: [PATCH] Remove unary plus.

---
 libsolidity/analysis/ConstantEvaluator.cpp                      | 2 --
 .../nameAndTypeResolution/308_rational_unary_plus_operation.sol | 1 +
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/libsolidity/analysis/ConstantEvaluator.cpp b/libsolidity/analysis/ConstantEvaluator.cpp
index 8a5fb8a66..fdb414c5e 100644
--- a/libsolidity/analysis/ConstantEvaluator.cpp
+++ b/libsolidity/analysis/ConstantEvaluator.cpp
@@ -220,8 +220,6 @@ optional<rational> ConstantEvaluator::evaluateUnaryOperator(Token _operator, rat
 			return nullopt;
 		else
 			return ~_input.numerator();
-	case Token::Add:
-		return +_input;
 	case Token::Sub:
 		return -_input;
 	default:
diff --git a/test/libsolidity/syntaxTests/nameAndTypeResolution/308_rational_unary_plus_operation.sol b/test/libsolidity/syntaxTests/nameAndTypeResolution/308_rational_unary_plus_operation.sol
index 8b401c1ae..276c6533d 100644
--- a/test/libsolidity/syntaxTests/nameAndTypeResolution/308_rational_unary_plus_operation.sol
+++ b/test/libsolidity/syntaxTests/nameAndTypeResolution/308_rational_unary_plus_operation.sol
@@ -7,3 +7,4 @@ contract test {
 }
 // ----
 // SyntaxError 9636: (70-75): Use of unary + is disallowed.
+// TypeError 4907: (70-75): Unary operator + cannot be applied to type rational_const 13 / 4