private SwitchElement[] ResolveElements(ParseInfo parseInfo, Scope scope, DeltinScriptParser.SwitchContext switchContext)
{
List <SwitchElement> elements = new List <SwitchElement>();
bool inSection = false;
bool caseError = false;
bool gotDefault = false;
// Resolve paths.
foreach (var switchElement in switchContext.switch_element())
{
// Syntax error if there is a statement before a case.
if (switchElement.documented_statement() != null && !inSection && !caseError)
{
parseInfo.Script.Diagnostics.Error("Expected case or default.", DocRange.GetRange(switchElement));
caseError = true;
}
// Don't throw the syntax error multiple times in one switch.
if (switchElement.DEFAULT() != null || switchElement.@case() != null)
{
inSection = true;
}
// Default case.
if (switchElement.DEFAULT() != null)
{
if (gotDefault)
{
parseInfo.Script.Diagnostics.Error("Switch cannot have multiple defaults.", DocRange.GetRange(switchElement));
}
gotDefault = true;
}
// Get the statement
if (switchElement.documented_statement() != null)
{
elements.Add(new SwitchElement(parseInfo.GetStatement(scope, switchElement.documented_statement())));
}
// Get the case
else if (switchElement.@case() != null)
{
elements.Add(new SwitchElement(DocRange.GetRange(switchElement.@case().CASE()), parseInfo.GetExpression(scope, switchElement.@case().expr())));
}
// Get default
else if (switchElement.DEFAULT() != null)
{
elements.Add(new SwitchElement(DocRange.GetRange(switchElement.DEFAULT())));
}
}
return(elements.ToArray());
}
public SwitchAction(ParseInfo parseInfo, Scope scope, DeltinScriptParser.SwitchContext switchContext)
{
// Get the expression.
if (switchContext.expr() == null)
{
parseInfo.Script.Diagnostics.Error("Expected expression.", DocRange.GetRange(switchContext.RIGHT_PAREN()));
}
else
{
Expression = parseInfo.GetExpression(scope, switchContext.expr());
}
paths = GetSections(ResolveElements(parseInfo.SetBreakHandler(this), scope, switchContext));
pathInfo = new PathInfo[paths.Length];
for (int i = 0; i < pathInfo.Length; i++)
{
pathInfo[i] = new PathInfo(paths[i].Block, paths[i].ErrorRange, paths[i].IsDefault);
}
}
