/// <summary>Multi-condition If block</summary>
/// <example>
/// If.Block(c => c
/// .Option(() => A.Equals(1), () => A.Set(2))
/// .Option(() => A.Equals(2), () => A.Set(9))
/// .Default( () => A.Set(5))
/// );
/// </example>
/// <param name="options"></param>
public static void Block(Func <_IfBlock, _IfBlock> block)
{
var ifBlock = block.Invoke(new _IfBlock());
var numOptions = ifBlock._options.Count;
var optionConditions = ifBlock._options.Where(x => x is _IfBlock._Option).Cast <_IfBlock._Option>().ToList();
var optionDefault = ifBlock._options.Where(x => x is _IfBlock._Default).Cast <_IfBlock._Default>().ToList();
var hasElse = optionDefault.Any();
Label?lblEnd = null;
if (numOptions > 1 || hasElse)
{
lblEnd = Labels.New();
}
var lastCondition = optionConditions.Last();
foreach (var oc in optionConditions)
{
var isLast = oc == lastCondition;
Branching._WriteCondition(oc.Condition, oc.Block, hasElse || !isLast ? lblEnd : null, null, oc.Invert); //don't output "GoTo EndIf" if this is the last condition
}
if (numOptions > 1)
{
if (hasElse)
{
optionDefault[0].Block?.Invoke();
}
if (lblEnd != null) //always true in this block, suppressing nullable complaint
{
Context.Write(lblEnd);
}
}
Reset();
}
public static void True(Func <Condition> condition, Action block) => Branching._WriteCondition(condition, block);
public static void False(Func <Condition> condition, Action block) => Branching._WriteCondition(condition, block, null, null, true);
public void Then(Action block)
{
Block = block;
Branching._WriteCondition(AC, block);
//return IfBlock;
}