Got it working exactly like you wanted ;)

libsolidity/parsing/ParserBase.cpp

@@ -44,7 +44,24 @@ int ParserBase::endPosition() const
 
 void ParserBase::expectToken(Token::Value _value)
 {
-	if (m_scanner->currentToken() != _value)
+	Token::Value tok = m_scanner->currentToken();
+	if (tok != _value)
+	{
+		if (Token::isElementaryTypeName(tok)) //for the sake of accuracy in reporting
+		{
+			unsigned firstSize;
+			unsigned secondSize;
+			tie(firstSize, secondSize) = m_scanner->currentTokenInfo();
+			ElementaryTypeNameToken elemTypeName(tok, firstSize, secondSize);
+			fatalParserError(
+				string("Expected token ") +
+				string(Token::name(_value)) +
+				string(" got '") +
+				elemTypeName.toString() +
+				string("'")
+			);
+		}
+		else
 			fatalParserError(
 				string("Expected token ") +
 				string(Token::name(_value)) +
@@ -52,6 +69,7 @@ void ParserBase::expectToken(Token::Value _value)
 				string(Token::name(m_scanner->currentToken())) +
 				string("'")
 			);
+	}
 	m_scanner->next();
 }
 
@@ -59,23 +77,54 @@ Token::Value ParserBase::expectAssignmentOperator()
 {
 	Token::Value op = m_scanner->currentToken();
 	if (!Token::isAssignmentOp(op))
+	{
+		if (Token::isElementaryTypeName(op)) //for the sake of accuracy in reporting
+		{
+			unsigned firstSize;
+			unsigned secondSize;
+			tie(firstSize, secondSize) = m_scanner->currentTokenInfo();
+			ElementaryTypeNameToken elemTypeName(op, firstSize, secondSize);
+			fatalParserError(
+				string("Expected assignment operator,  got '") +
+				elemTypeName.toString() +
+				string("'")
+			);
+		}
+		else
 			fatalParserError(
 				string("Expected assignment operator,  got '") +
 				string(Token::name(m_scanner->currentToken())) +
 				string("'")
 			);
+	}
 	m_scanner->next();
 	return op;
 }
 
 ASTPointer<ASTString> ParserBase::expectIdentifierToken()
 {
-	if (m_scanner->currentToken() != Token::Identifier)
+	Token::Value id = m_scanner->currentToken();
+	if (id != Token::Identifier)
+	{
+		if (Token::isElementaryTypeName(id)) //for the sake of accuracy in reporting
+		{
+			unsigned firstSize;
+			unsigned secondSize;
+			tie(firstSize, secondSize) = m_scanner->currentTokenInfo();
+			ElementaryTypeNameToken elemTypeName(id, firstSize, secondSize);
 			fatalParserError(
 				string("Expected identifier, got '") +
-			string(Token::name(m_scanner->currentToken())) +
+				elemTypeName.toString() +
 				string("'")
 			);
+		}
+		else
+			fatalParserError(
+				string("Expected identifier, got '") +
+				string(Token::name(id)) +
+				string("'")
+			);
+	}
 	return getLiteralAndAdvance();
 }
 

libsolidity/parsing/Token.h

@@ -190,18 +190,18 @@ namespace solidity
 	K(After, "after", 0)                                               \
 	/* type keywords*/                                                 \
 	K(Int, "int", 0)                                                   \
-	T(IntM, "intM", 0)                                                 \
 	K(UInt, "uint", 0)                                                 \
-	T(UIntM, "uintM", 0)                                               \
 	K(Bytes, "bytes", 0)                                               \
-	T(BytesM, "bytesM", 0)                                             \
 	K(Byte, "byte", 0)                                                 \
 	K(String, "string", 0)                                             \
 	K(Address, "address", 0)                                           \
 	K(Bool, "bool", 0)                                                 \
 	K(Fixed, "fixed", 0)                                               \
-	T(FixedMxN, "fixedMxN", 0)                                         \
 	K(UFixed, "ufixed", 0)                                             \
+	T(IntM, "intM", 0)                                                 \
+	T(UIntM, "uintM", 0)                                               \
+	T(BytesM, "bytesM", 0)                                             \
+	T(FixedMxN, "fixedMxN", 0)                                         \
 	T(UFixedMxN, "ufixedMxN", 0)                                       \
 	T(TypesEnd, NULL, 0) /* used as type enum end marker */            \
 	\
@@ -334,7 +334,9 @@ public:
 		std::string name = Token::toString(m_token);
 		if (tokenValue || (firstNumber() == 0 && secondNumber() == 0))
 			return name;
-		//need to set it up this way for fixed types construction in future
+		else if (m_token == Token::FixedMxN || m_token == Token::UFixedMxN)
+			return name.substr(0, name.size() - 3) + std::to_string(m_firstNumber) + "x" + std::to_string(m_secondNumber);
+		else
 			return name.substr(0, name.size() - 1) + std::to_string(m_firstNumber);
 	}