public void ParseNumExpression()
{
Parser parser;
NVNumExpression expr = (NVNumExpression)GetExpressionFromTemplate("100", out parser);
// Check that the value of the expression is '100'
Assert.AreEqual(100, expr.Value);
AssertNoErrors(parser);
}
public void ParseReferenceWithOneActualParam()
{
Parser parser = GetNewParser("$first.second(100)");
TemplateNode templateNode = parser.ParseTemplate();
// NVReference with 1 selector and 1 actual param
NVReference nvReference = (NVReference)templateNode.Content[0];
Assert.AreEqual(1, nvReference.Designator.Selectors.Count);
NVSelector nvSelector = nvReference.Designator.Selectors[0];
Assert.AreEqual(1, nvSelector.Actuals.Count);
Assert.AreEqual(typeof(NVNumExpression), nvSelector.Actuals[0].GetType());
NVNumExpression numExpr = (NVNumExpression)nvSelector.Actuals[0];
Assert.AreEqual(100, numExpr.Value);
}
private NVExpression ParseNVPrimary()
{
// NVPrimary -> NVReference
// -> "(" NVExpression ")"
// -> "true"
// -> "false"
// -> nvIntegerLiteral
// -> "'" nvStringLiteral "'"
// -> "\"" NVStringLiteralOrDictionary "\""
// -> "[" [ NVExpression NVRangeOrArray ] "]".
NVExpression expr = null;
if (CurrentTokenType == TokenType.NVDollar)
{
//TODO: Change to ParseNVDesignatorExpression
ParseNVReference();
expr = new NVBoolExpression(false);
expr.Position = new Position(GetCurrentTokenPosition());
}
else if (CurrentTokenType == TokenType.NVLParen)
{
_scanner.GetToken();
expr = ParseNVExpression();
MatchToken(TokenType.NVRParen);
}
else if (CurrentTokenType == TokenType.NVTrue)
{
expr = new NVBoolExpression(true);
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
else if (CurrentTokenType == TokenType.NVFalse)
{
expr = new NVBoolExpression(false);
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
else if (CurrentTokenType == TokenType.NVIntegerLiteral)
{
expr = new NVNumExpression(int.Parse(_scanner.CurrentToken.Image));
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
else if (CurrentTokenType == TokenType.NVSingleQuote)
{
_scanner.GetToken();
if (CurrentTokenType == TokenType.NVStringLiteral)
{
expr = new NVStringExpression(_scanner.CurrentToken.Image);
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
if (CurrentTokenType == TokenType.NVSingleQuote)
{
_scanner.GetToken();
}
else
{
AddError("Expected single quote for closing string literal");
}
}
else if (CurrentTokenType == TokenType.NVDoubleQuote)
{
_scanner.GetToken();
expr = ParseNVStringLiteralOrDictionary();
MatchToken(TokenType.NVDoubleQuote);
}
else if (CurrentTokenType == TokenType.NVLBrack)
{
_scanner.GetToken();
if (CurrentTokenType != TokenType.NVRBrack)
{
ParseNVExpression();
expr = ParseNVRangeOrArray();
}
else
{
//TODO: replace with an empty NVArrayExpression
expr = new NVBoolExpression(false);
expr.Position = new Position(GetCurrentTokenPosition());
}
MatchToken(TokenType.NVRBrack);
}
else
{
AddError(string.Format("Expected expression, was '{0}'", CurrentTokenType));
}
return expr;
}
private NVExpression ParseNVPrimary()
{
// NVPrimary -> NVReference
// -> "(" NVExpression ")"
// -> "true"
// -> "false"
// -> nvIntegerLiteral
// -> "'" nvStringLiteral "'"
// -> "\"" NVStringLiteralOrDictionary "\""
// -> "[" [ NVExpression NVRangeOrArray ] "]".
NVExpression expr = null;
if (CurrentTokenType == TokenType.NVDollar)
{
//TODO: Change to ParseNVDesignatorExpression
ParseNVReference();
expr = new NVBoolExpression(false);
expr.Position = new Position(GetCurrentTokenPosition());
}
else if (CurrentTokenType == TokenType.NVLParen)
{
_scanner.GetToken();
expr = ParseNVExpression();
MatchToken(TokenType.NVRParen);
}
else if (CurrentTokenType == TokenType.NVTrue)
{
expr = new NVBoolExpression(true);
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
else if (CurrentTokenType == TokenType.NVFalse)
{
expr = new NVBoolExpression(false);
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
else if (CurrentTokenType == TokenType.NVIntegerLiteral)
{
expr = new NVNumExpression(int.Parse(_scanner.CurrentToken.Image));
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
else if (CurrentTokenType == TokenType.NVSingleQuote)
{
_scanner.GetToken();
if (CurrentTokenType == TokenType.NVStringLiteral)
{
expr = new NVStringExpression(_scanner.CurrentToken.Image);
expr.Position = new Position(GetCurrentTokenPosition());
_scanner.GetToken();
}
if (CurrentTokenType == TokenType.NVSingleQuote)
{
_scanner.GetToken();
}
else
{
AddError("Expected single quote for closing string literal");
}
}
else if (CurrentTokenType == TokenType.NVDoubleQuote)
{
_scanner.GetToken();
expr = ParseNVStringLiteralOrDictionary();
MatchToken(TokenType.NVDoubleQuote);
}
else if (CurrentTokenType == TokenType.NVLBrack)
{
_scanner.GetToken();
if (CurrentTokenType != TokenType.NVRBrack)
{
ParseNVExpression();
expr = ParseNVRangeOrArray();
}
else
{
//TODO: replace with an empty NVArrayExpression
expr = new NVBoolExpression(false);
expr.Position = new Position(GetCurrentTokenPosition());
}
MatchToken(TokenType.NVRBrack);
}
else
{
AddError(string.Format("Expected expression, was '{0}'", CurrentTokenType));
}
return(expr);
}
