/// <summary>
/// Initializes a new instance of the IsExpression class.
/// </summary>
/// <param name="tokens">
/// The list of tokens that form the expression.
/// </param>
/// <param name="leftSideExpression">
/// The left hand side of the expression.
/// </param>
/// <param name="rightSideExpression">
/// The right hand side of the expression.
/// </param>
/// <param name="matchVariable">
/// The variable declared as part of pattern match of the expression.
/// </param>
internal IsExpression(CsTokenList tokens, Expression leftSideExpression, Expression rightSideExpression, Expression matchVariable)
: base(ExpressionType.Is, tokens)
{
Param.AssertNotNull(tokens, "tokens");
Param.AssertNotNull(leftSideExpression, "leftSideExpression");
Param.AssertNotNull(rightSideExpression, "rightSideExpression");
Param.Ignore(matchVariable);
this.leftHandSideExpression = leftSideExpression;
this.rightHandSideExpression = rightSideExpression;
this.matchVariable = matchVariable;
// Extract the type being compared to, if possible.
LiteralExpression le = this.rightHandSideExpression as LiteralExpression;
if (le != null)
{
this.type = CodeParser.TryExtractTypeTokenFromLiteralExpression(le);
}
this.AddExpression(this.leftHandSideExpression);
this.AddExpression(this.rightHandSideExpression);
if (this.matchVariable != null)
{
this.AddExpression(this.matchVariable);
}
}
