/// <summary>
/// Parser for If(Else)Statement
/// </summary>
/// <returns>Parsed If(Else)Statement</returns>
public Statement ParseIfStatement()
{
Statement statement = null;
//Skip if keyword
NextToken("if", "if ( Predicate ) Statement else Statement", "if");
//Skip ( token
NextToken("(", "if ( Predicate ) Statement else Statement", '(');
//Parse predicate
Predicate predicate = predicateParser.ParsePredicate();
//Skip ) token
NextToken(")", "if ( Predicate ) Statement else Statement", ')');
//Parse if part of statement
Statement ifStatementPart = ParseStatement();
if (TokenStream.HasNext() && TokenStream.Peek(1).GetValue().ToString() == "else")
{ //Else part detected
//Skip else token
NextToken("else", "if ( Predicate ) Statement else Statement", "else");
//Parse else statement part
Statement elseStatementPart = ParseStatement();
IfElseStatement ifElseStatement = new IfElseStatement();
ifElseStatement.SetPredicate(predicate);
ifElseStatement.SetTrueStatement(ifStatementPart);
ifElseStatement.SetFalseStatement(elseStatementPart);
statement = ifElseStatement;
}
else
{ //If statement
IfStatement ifStatement = new IfStatement();
ifStatement.SetPredicate(predicate);
ifStatement.SetTrueStatement(ifStatementPart);
statement = ifStatement;
}
return(statement);
}
