/// <exception cref="ArgumentNullException"><paramref name="context" /> or <paramref name="jumpTarget" /> is <c>null</c>.</exception>
internal LSLJumpStatementNode(
LSLParser.JumpStatementContext context,
LSLLabelStatementNode jumpTarget
)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (jumpTarget == null)
{
throw new ArgumentNullException("jumpTarget");
}
LabelName = context.jump_target.Text;
JumpTarget = jumpTarget;
JumpTarget.AddJumpToHere(this);
SourceRange = new LSLSourceCodeRange(context);
SourceRangeLabelName = new LSLSourceCodeRange(context.jump_target);
SourceRangeJumpKeyword = new LSLSourceCodeRange(context.jump_keyword);
SourceRangeSemicolon = new LSLSourceCodeRange(context.semi_colon);
SourceRangesAvailable = true;
}
public override bool VisitLabelStatement(LSLParser.LabelStatementContext context)
{
if (context == null || context.label_name == null)
{
throw LSLCodeValidatorInternalException.VisitContextInvalidState("VisitLabelStatement", true);
}
if (_scopingManager.LabelPreDefinedAnywhere(context.label_name.Text))
{
GenSyntaxError().RedefinedLabel(new LSLSourceCodeRange(context), context.label_name.Text);
return(false);
}
var ctx = new LSLLabelStatementNode(context);
var statementIndexInfo = _statementIndexStack.Peek();
ctx.ParentScopeId = statementIndexInfo.ScopeId;
ctx.StatementIndex = statementIndexInfo.Index;
_scopingManager.PreDefineLabel(context.label_name.Text, ctx);
return(base.VisitLabelStatement(context));
}
/// <summary>
/// Creates an <see cref="LSLJumpStatementNode" /> that jumps to a specified <see cref="LSLLabelStatementNode" />, with
/// a <see cref="ParentScopeId" /> of zero.
/// <paramref name="jumpTarget" /> receives a <see cref="LSLLabelStatementNode.JumpsToHere" /> reference via
/// <see cref="LSLLabelStatementNode.AddJumpToHere" />.
/// </summary>
/// <param name="jumpTarget">The <see cref="LSLLabelStatementNode" /> to jump to.</param>
/// <exception cref="ArgumentNullException"><paramref name="jumpTarget" /> is <c>null</c>.</exception>
/// <exception cref="ArgumentException"><paramref name="jumpTarget" /> does not have a Parent, is not already in the syntax tree.</exception>
public LSLJumpStatementNode(LSLLabelStatementNode jumpTarget)
{
if (jumpTarget == null)
{
throw new ArgumentNullException("jumpTarget");
}
if (jumpTarget.Parent == null)
{
throw new ArgumentException("jumpTarget.Parent is null, must have a parent (be part of the syntax tree) prior to being jumped to.", "jumpTarget");
}
LabelName = jumpTarget.LabelName;
JumpTarget = jumpTarget;
JumpTarget.AddJumpToHere(this);
}
/// <summary>
/// Sets a labels parent to this <see cref="LSLCodeScopeNode"/>, also sets <see cref="LSLLabelStatementNode.ParentScopeId"/> to this nodes <see cref="ScopeId"/>.
/// </summary>
/// <param name="label">The label node to take pre define ownership of.</param>
/// <returns><paramref name="label"/>.</returns>
/// <exception cref="ArgumentNullException"><paramref name="label"/> is <c>null</c>.</exception>
public LSLLabelStatementNode PreDefineLabel(LSLLabelStatementNode label)
{
if (label == null)
{
throw new ArgumentNullException("label");
}
if (_preDefinedLabels == null)
{
_preDefinedLabels = new HashSet <LSLLabelStatementNode>(
new LambdaEqualityComparer <LSLLabelStatementNode>(ReferenceEquals)
);
}
label.Parent = this;
label.ParentScopeId = ScopeId;
_preDefinedLabels.Add(label);
return(label);
}
public void PreDefineLabel(string name, LSLLabelStatementNode statement)
{
_labelScopes[CurrentCodeScopeContext][name] = statement;
}
