/// <summary>
/// The save.
/// </summary>
/// <param name="operator">
/// The operator.
/// </param>
private void Save(LogicalExpression.Operator @operator)
{
var operatorString = string.Empty;
switch (@operator)
{
case LogicalExpression.Operator.And:
operatorString = "&";
break;
case LogicalExpression.Operator.Or:
operatorString = "|";
break;
case LogicalExpression.Operator.Xor:
operatorString = "^";
break;
default:
break;
}
this.cppWriter.Write(' ');
this.cppWriter.Write(operatorString);
this.cppWriter.Write(' ');
}
/// <summary>
/// Reads a logical expression.
/// </summary>
/// <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="parentReference">
/// The parent code part.
/// </param>
/// <param name="unsafeCode">
/// Indicates whether the code being parsed resides in an unsafe code block.
/// </param>
/// <returns>
/// Returns the expression.
/// </returns>
private LogicalExpression GetLogicalExpression(
Expression leftHandSide, ExpressionPrecedence previousPrecedence, Reference<ICodePart> parentReference, bool unsafeCode)
{
Param.AssertNotNull(leftHandSide, "leftHandSide");
Param.Ignore(previousPrecedence);
Param.AssertNotNull(parentReference, "parentReference");
Param.Ignore(unsafeCode);
LogicalExpression expression = null;
Reference<ICodePart> expressionReference = new Reference<ICodePart>();
// Read the details of the expression.
OperatorSymbol operatorToken = this.PeekOperatorToken(parentReference, expressionReference);
Debug.Assert(operatorToken.Category == OperatorCategory.Logical, "Expected a logical 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))
{
// Add the operator token to the document and advance the symbol manager up to it.
this.symbols.Advance();
this.tokens.Add(operatorToken);
// Get the expression on the right-hand side of the operator.
Expression rightHandSide = this.GetOperatorRightHandExpression(precedence, expressionReference, unsafeCode);
// Create the partial token list for the expression.
CsTokenList partialTokens = new CsTokenList(this.tokens, leftHandSide.Tokens.First, this.tokens.Last);
// Get the expression operator type.
LogicalExpression.Operator type;
switch (operatorToken.SymbolType)
{
case OperatorType.LogicalAnd:
type = LogicalExpression.Operator.And;
break;
case OperatorType.LogicalOr:
type = LogicalExpression.Operator.Or;
break;
case OperatorType.LogicalXor:
type = LogicalExpression.Operator.Xor;
break;
default:
Debug.Fail("Unexpected operator type");
throw new InvalidOperationException();
}
// Create and return the expression.
expression = new LogicalExpression(partialTokens, type, leftHandSide, rightHandSide);
expressionReference.Target = expression;
}
return expression;
}
/// <summary>
/// The save.
/// </summary>
/// <param name="logicalExpression">
/// The logical expression.
/// </param>
private void Save(LogicalExpression logicalExpression)
{
@switch(logicalExpression.LeftHandSide);
this.Save(logicalExpression.OperatorType);
@switch(logicalExpression.RightHandSide);
}
