/// <summary>
/// Reads a relational expression.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="leftHandSide">The expression on the left hand side of the operator.</param>
/// <param name="previousPrecedence">The precedence of the previous expression.</param>
/// <returns>Returns the expression.</returns>
private RelationalExpression GetConditionalPreprocessorEqualityExpression(
CodeUnitProxy parentProxy, Expression leftHandSide, ExpressionPrecedence previousPrecedence)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.AssertNotNull(leftHandSide, "leftHandSide");
Param.Ignore(previousPrecedence);
RelationalExpression expression = null;
this.AdvanceToNextConditionalDirectiveCodeSymbol(parentProxy);
var expressionProxy = new CodeUnitProxy(this.document);
// Create the operator symbol.
OperatorSymbolToken operatorToken = this.PeekOperatorSymbolToken();
// Check the precedence of the operators to make sure we can gather this statement now.
ExpressionPrecedence precedence = GetOperatorPrecedence(operatorToken.SymbolType);
if (CheckPrecedence(previousPrecedence, precedence))
{
// Add the operator token to the document and advance the symbol manager up to it.
this.symbols.Advance();
expressionProxy.Children.Add(operatorToken);
// Get the expression on the right-hand side of the operator.
Expression rightHandSide = this.GetNextConditionalPreprocessorExpression(this.document, expressionProxy, precedence);
if (rightHandSide == null)
{
throw new SyntaxException(this.document, operatorToken.LineNumber);
}
// Get the expression operator type.
switch (operatorToken.SymbolType)
{
case OperatorType.ConditionalEquals:
expression = new EqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.NotEquals:
expression = new NotEqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
default:
throw new SyntaxException(this.document, operatorToken.LineNumber);
}
parentProxy.Children.Add(expression);
}
return(expression);
}
/// <summary>
/// Reads a relational expression.
/// </summary>
/// <param name="expressionProxy">Proxy object for the expression being created.</param>
/// <param name="leftHandSide">The expression on the left hand side of the operator.</param>
/// <param name="previousPrecedence">The precedence of the expression just before this one.</param>
/// <param name="unsafeCode">Indicates whether the code being parsed resides in an unsafe code block.</param>
/// <returns>Returns the expression.</returns>
private RelationalExpression GetRelationalExpression(
CodeUnitProxy expressionProxy, Expression leftHandSide, ExpressionPrecedence previousPrecedence, bool unsafeCode)
{
Param.AssertNotNull(expressionProxy, "expressionProxy");
Param.AssertNotNull(leftHandSide, "leftHandSide");
Param.Ignore(previousPrecedence);
Param.Ignore(unsafeCode);
RelationalExpression expression = null;
// Read the details of the expression.
OperatorSymbolToken operatorToken = this.PeekOperatorSymbolToken();
CsLanguageService.Debug.Assert(operatorToken.Category == OperatorCategory.Relational, "Expected a relational operator");
// Check the precedence of the operators to make sure we can gather this statement now.
ExpressionPrecedence precedence = GetOperatorPrecedence(operatorToken.SymbolType);
if (CheckPrecedence(previousPrecedence, precedence))
{
// Create the operator toke again and save it.
operatorToken = this.GetOperatorSymbolToken(expressionProxy);
// Get the expression on the right-hand side of the operator.
Expression rightHandSide = this.GetOperatorRightHandExpression(expressionProxy, precedence, unsafeCode);
// Get the expression operator type.
switch (operatorToken.SymbolType)
{
case OperatorType.ConditionalEquals:
expression = new EqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.NotEquals:
expression = new NotEqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.GreaterThan:
expression = new GreaterThanExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.GreaterThanOrEquals:
expression = new GreaterThanOrEqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.LessThan:
expression = new LessThanExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.LessThanOrEquals:
expression = new LessThanOrEqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
default:
CsLanguageService.Debug.Fail("Unexpected operator type");
throw new InvalidOperationException();
}
}
return expression;
}
/// <summary>
/// Reads a relational expression.
/// </summary>
/// <param name="parentProxy">Represents the parent item.</param>
/// <param name="leftHandSide">The expression on the left hand side of the operator.</param>
/// <param name="previousPrecedence">The precedence of the previous expression.</param>
/// <returns>Returns the expression.</returns>
private RelationalExpression GetConditionalPreprocessorEqualityExpression(
CodeUnitProxy parentProxy, Expression leftHandSide, ExpressionPrecedence previousPrecedence)
{
Param.AssertNotNull(parentProxy, "parentProxy");
Param.AssertNotNull(leftHandSide, "leftHandSide");
Param.Ignore(previousPrecedence);
RelationalExpression expression = null;
this.AdvanceToNextConditionalDirectiveCodeSymbol(parentProxy);
var expressionProxy = new CodeUnitProxy(this.document);
// Create the operator symbol.
OperatorSymbolToken operatorToken = this.PeekOperatorSymbolToken();
// Check the precedence of the operators to make sure we can gather this statement now.
ExpressionPrecedence precedence = GetOperatorPrecedence(operatorToken.SymbolType);
if (CheckPrecedence(previousPrecedence, precedence))
{
// Add the operator token to the document and advance the symbol manager up to it.
this.symbols.Advance();
expressionProxy.Children.Add(operatorToken);
// Get the expression on the right-hand side of the operator.
Expression rightHandSide = this.GetNextConditionalPreprocessorExpression(this.document, expressionProxy, precedence);
if (rightHandSide == null)
{
throw new SyntaxException(this.document, operatorToken.LineNumber);
}
// Get the expression operator type.
switch (operatorToken.SymbolType)
{
case OperatorType.ConditionalEquals:
expression = new EqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
case OperatorType.NotEquals:
expression = new NotEqualToExpression(expressionProxy, leftHandSide, rightHandSide);
break;
default:
throw new SyntaxException(this.document, operatorToken.LineNumber);
}
parentProxy.Children.Add(expression);
}
return expression;
}
