protected void DisallowIncrement(Parsed.Object expr)
{
if (expr is Parsed.IncDecExpression)
{
Error("Can't use increment/decrement here. It can only be used on a ~ line");
}
}
CommandLineInputResult ExecuteImmediateStatement(Parsed.Object parsedObj)
{
var result = new CommandLineInputResult();
// Variable assignment: create in Parsed.Story as well as the Runtime.Story
// so that we don't get an error message during reference resolution
if (parsedObj is Parsed.VariableAssignment)
{
var varAssign = (Parsed.VariableAssignment)parsedObj;
if (varAssign.isNewTemporaryDeclaration)
{
_parsedStory.TryAddNewVariableDeclaration(varAssign);
}
}
parsedObj.parent = _parsedStory;
var runtimeObj = parsedObj.runtimeObject;
parsedObj.ResolveReferences(_parsedStory);
if (!_parsedStory.hadError)
{
// Divert
if (parsedObj is Parsed.Divert)
{
var parsedDivert = parsedObj as Parsed.Divert;
result.divertedPath = parsedDivert.runtimeDivert.targetPath.ToString();
}
// Expression or variable assignment
else if (parsedObj is Parsed.Expression || parsedObj is Parsed.VariableAssignment)
{
var evalResult = _runtimeStory.EvaluateExpression((Runtime.Container)runtimeObj);
if (evalResult != null)
{
result.output = evalResult.ToString();
}
}
}
else
{
_parsedStory.ResetError();
}
return(result);
}
protected Parsed.Object InnerLogic()
{
Whitespace();
// Explicitly try the combinations of inner logic
// that could potentially have conflicts first.
// Explicit sequence annotation?
SequenceType?explicitSeqType = (SequenceType?)ParseObject(SequenceTypeAnnotation);
if (explicitSeqType != null)
{
var contentLists = (List <ContentList>)Expect(InnerSequenceObjects, "sequence elements (for cycle/stoping etc)");
return(new Sequence(contentLists, (SequenceType)explicitSeqType));
}
// Conditional with expression?
var initialQueryExpression = Parse(ConditionExpression);
if (initialQueryExpression)
{
var conditional = (Conditional)Expect(() => InnerConditionalContent(initialQueryExpression), "conditional content following query (i.e. '" + initialQueryExpression + "'");
return(conditional);
}
// Now try to evaluate each of the "full" rules in turn
ParseRule[] rules =
{
// Conditional still necessary, since you can have a multi-line conditional
// without an initial query expression:
// {
// - true: this is true
// - false: this is false
// }
InnerConditionalContent,
InnerSequence,
InnerExpression,
};
// Adapted from "OneOf" structuring rule except that in
// order for the rule to succeed, it has to maximally
// cover the entire string within the { }. Used to
// differentiate between:
// {myVar} -- Expression (try first)
// {my content is jolly} -- sequence with single element
foreach (ParseRule rule in rules)
{
int ruleId = BeginRule();
Parsed.Object result = ParseObject(rule) as Parsed.Object;
if (result)
{
// Not yet at end?
if (Peek(Spaced(String("}"))) == null)
{
FailRule(ruleId);
}
// Full parse of content within braces
else
{
return((Parsed.Object)SucceedRule(ruleId, result));
}
}
else
{
FailRule(ruleId);
}
}
return(null);
}
protected void ErrorWithParsedObject(string message, Parsed.Object result, bool isWarning = false)
{
ErrorOnLine(message, result.debugMetadata.startLineNumber, isWarning);
}