/// <summary>
/// Initializes a new instance of <see cref="ConditionalStatement" /> for the specified condition, true statement and false statement.
/// </summary>
/// <param name="parent">The parent condition in a chain of if-elseif conditions.</param>
/// <param name="condition">The condition that is tested.</param>
/// <param name="thenStatement">The statement that is run when the condition evaluates to anything else but falsy.</param>
/// <param name="elseStatement">The statement that is run when the condition evaluates to falsy.</param>
public ConditionalStatement(ConditionalStatement parent, Expression condition, Statement thenStatement, Statement elseStatement)
{
_parent = parent;
_condition = condition;
_thenStatement = thenStatement;
_elseStatement = elseStatement;
}
/// <summary>
/// Initializes a new instance of <see cref="ConditionalStatement" /> for the specified condition, true statement and false statement.
/// </summary>
/// <param name="parent">The parent condition in a chain of if-elseif conditions.</param>
/// <param name="condition">The condition that is tested.</param>
/// <param name="thenStatement">The statement that is run when the condition evaluates to anything else but falsy.</param>
/// <param name="elseStatement">The statement that is run when the condition evaluates to falsy.</param>
public ConditionalStatement(ConditionalStatement parent, Expression condition, Statement thenStatement, Statement elseStatement)
{
_parent = parent;
_condition = condition;
_thenStatement = thenStatement;
_elseStatement = elseStatement;
}
/// <summary>
/// Creates a copy of the specified instance of <see cref="ConditionalStatement" /> and adds a then statement.
/// </summary>
/// <param name="statement">The instance of <see cref="ConditionalStatement" /> to copy the <see cref="ConditionalStatement.Parent" />,
/// <see cref="ConditionalStatement.Condition" /> and <see cref="ConditionalStatement.ThenStatement" /> from.</param>
/// <param name="statements">A sequence of statements to add to the then block of the new instance.</param>
/// <returns>a new instance of <see cref="ConditionalStatement" />.</returns>
public static ConditionalStatement Else(this ConditionalStatement statement, IEnumerable <Statement> statements)
{
if (statement == null)
{
throw new ArgumentNullException("statement");
}
return(new ConditionalStatement(statement.Parent, statement.Condition, statement.ThenStatement, JS.BlockOrStatement(statements)));
}
/// <summary>
/// Creates a copy of the specified instance of <see cref="ConditionalStatement" /> and adds a then statement.
/// </summary>
/// <param name="statement">The instance of <see cref="ConditionalStatement" /> to copy the <see cref="ConditionalStatement.Parent" />,
/// <see cref="ConditionalStatement.Condition" /> and <see cref="ConditionalStatement.ElseStatement" /> from.</param>
/// <param name="statements">An array of statements to add to the then block of the new instance.</param>
/// <returns>a new instance of <see cref="ConditionalStatement" />.</returns>
public static ConditionalStatement Then(this ConditionalStatement statement, params Statement[] statements)
{
if (statement == null)
{
throw new ArgumentNullException("statement");
}
return(new ConditionalStatement(statement.Parent, statement.Condition, JS.BlockOrStatement(statements), statement.ElseStatement));
}
/// <summary>
/// Creates a new instance of <see cref="ConditionalStatement" /> that forms an else-if condition after the specified condition.
/// </summary>
/// <param name="statement">The conditional to which to add an else-if condition to.</param>
/// <param name="condition">The condition to test.</param>
/// <returns>a new instance of <see cref="ConditionalStatement" />.</returns>
/// <remarks>
/// This produces a new instance, and has no side effects on the existing statement (as all of the helpers are designed to) but
/// it does refer to the existing instance. Therefore, there may be undesired effects when the original is somehow modified.
/// However, in the typical use case (a fluent description of the conditional statement) there is no such problem.
/// </remarks>
public static ConditionalStatement ElseIf(this ConditionalStatement statement, Expression condition)
{
if (statement == null)
{
throw new ArgumentNullException("statement");
}
ConditionalStatement parent = new ConditionalStatement(statement.Parent, statement.Condition, statement.ThenStatement, null);
ConditionalStatement result = new ConditionalStatement(parent, condition, null, null);
parent.ElseStatement = result;
return result;
}
/// <summary>
/// Creates a new instance of <see cref="ConditionalStatement" /> that forms an else-if condition after the specified condition.
/// </summary>
/// <param name="statement">The conditional to which to add an else-if condition to.</param>
/// <param name="condition">The condition to test.</param>
/// <returns>a new instance of <see cref="ConditionalStatement" />.</returns>
/// <remarks>
/// This produces a new instance, and has no side effects on the existing statement (as all of the helpers are designed to) but
/// it does refer to the existing instance. Therefore, there may be undesired effects when the original is somehow modified.
/// However, in the typical use case (a fluent description of the conditional statement) there is no such problem.
/// </remarks>
public static ConditionalStatement ElseIf(this ConditionalStatement statement, Expression condition)
{
if (statement == null)
{
throw new ArgumentNullException("statement");
}
ConditionalStatement parent = new ConditionalStatement(statement.Parent, statement.Condition, statement.ThenStatement, null);
ConditionalStatement result = new ConditionalStatement(parent, condition, null, null);
parent.ElseStatement = result;
return(result);
}
