Looking pragma operators per range and not per tokens.

Add 3 invalid tests and 2 valid tests

liblangutil/SemVerHandler.cpp

@@ -208,7 +208,10 @@ void SemVerMatchExpressionParser::parseMatchExpression()
 	range.components.push_back(parseMatchComponent());
 	if (currentToken() == Token::Sub)
 	{
-		if (containPrefixingToken())
+		nextToken();
+		range.components.push_back(parseMatchComponent());
+
+		if (TokenTraits::isPragmaOp(range.components[0].prefix) || TokenTraits::isPragmaOp(range.components[1].prefix))
 		{
 			solThrow(
 				SemVerError,
@@ -217,8 +220,6 @@ void SemVerMatchExpressionParser::parseMatchExpression()
 		}
 
 		range.components[0].prefix = Token::GreaterThanOrEqual;
-		nextToken();
-		range.components.push_back(parseMatchComponent());
 		range.components[1].prefix = Token::LessThanOrEqual;
 	}
 	else
@@ -332,11 +333,3 @@ void SemVerMatchExpressionParser::nextToken()
 	++m_pos;
 	m_posInside = 0;
 }
-
-bool SemVerMatchExpressionParser::containPrefixingToken() const
-{
-	if (std::find_if(m_tokens.begin(), m_tokens.end(), TokenTraits::isPragmaOp) != m_tokens.end())
-		return true;
-	else
-		return false;
-}

liblangutil/SemVerHandler.h

@@ -102,7 +102,6 @@ private:
 	char nextChar();
 	Token currentToken() const;
 	void nextToken();
-	bool containPrefixingToken() const;
 
 	std::vector<Token> m_tokens;
 	std::vector<std::string> m_literals;

test/libsolidity/syntaxTests/pragma/invalid_range_operator_range_first.sol

@@ -0,0 +1,3 @@
+pragma solidity <0.8.17 - 0.8.20;
+// ----
+// ParserError 1684: (0-33): Invalid version pragma. You cannot use operators (<, <=, >=, >, ^) with version ranges (-).

test/libsolidity/syntaxTests/pragma/invalid_range_operator_range_second.sol

@@ -0,0 +1,3 @@
+pragma solidity 0.8.17 - >0.8.20;
+// ----
+// ParserError 1684: (0-33): Invalid version pragma. You cannot use operators (<, <=, >=, >, ^) with version ranges (-).

test/libsolidity/syntaxTests/pragma/invalid_range_operator_range_two_ranges.sol

@@ -0,0 +1,3 @@
+pragma solidity 0.8.14 || 0.8.17 - >0.8.20;
+// ----
+// ParserError 1684: (0-43): Invalid version pragma. You cannot use operators (<, <=, >=, >, ^) with version ranges (-).

test/libsolidity/syntaxTests/pragma/valid_range_operator.sol

@@ -0,0 +1,2 @@
+pragma solidity 0.8.17 - 0.8.20;
+// ----

test/libsolidity/syntaxTests/pragma/valid_range_operator_two_ranges.sol

@@ -0,0 +1,2 @@
+pragma solidity <0.8.15 || 0.8.17 - 0.8.20;
+// ----