public override void EnterTypeCaseClause(GoParser.TypeCaseClauseContext context)
{
// typeCaseClause
// : typeSwitchCase ':' statementList
// typeSwitchCase
// : 'case' typeList | 'default'
// typeList
// : type ( ',' type )*
if (context.typeSwitchCase().typeList() is null)
{
GoParser.TypeSwitchStmtContext parent = context.Parent as GoParser.TypeSwitchStmtContext;
string identifier = parent == null ? "" : SanitizedIdentifier(parent.typeSwitchGuard().IDENTIFIER().GetText());
m_typeSwitchDefaultCase.Peek().Append($"{Environment.NewLine}{Spacing()}default:{Environment.NewLine}{Spacing()}{{{Environment.NewLine}");
if (!string.IsNullOrEmpty(identifier))
{
m_typeSwitchDefaultCase.Peek().Append($"{Spacing(1)}var {identifier} = {string.Format(TypeSwitchExpressionMarker, m_typeSwitchExpressionLevel)};{Environment.NewLine}");
}
}
else
{
m_targetFile.Append($"{Environment.NewLine}{Spacing()}case {string.Format(TypeSwitchCaseTypeMarker, m_typeSwitchExpressionLevel)}{Environment.NewLine}");
}
IndentLevel++;
PushBlock();
}
public override void ExitTypeCaseClause(GoParser.TypeCaseClauseContext context)
{
// typeCaseClause
// : typeSwitchCase ':' statementList
// typeSwitchCase
// : 'case' typeList | 'default'
// typeList
// : type ( ',' type )*
IndentLevel--;
if (context.typeSwitchCase().typeList() is null)
{
m_typeSwitchDefaultCase.Peek().Append($"{PopBlock(false)}{Spacing(1)}break;{Environment.NewLine}{Spacing()}}}");
}
else
{
string caseBlock = $"{PopBlock(false)}{Spacing(1)}break;";
m_targetFile.Append(caseBlock);
GoParser.TypeSwitchStmtContext parent = context.Parent as GoParser.TypeSwitchStmtContext;
string identifier = parent == null ? "_" : SanitizedIdentifier(parent.typeSwitchGuard().IDENTIFIER().GetText());
GoParser.TypeListContext typeList = context.typeSwitchCase().typeList();
StringBuilder caseTypeExpressions = new StringBuilder();
HashSet <string> typeNames = new HashSet <string>();
for (int i = 0; i < typeList.type_().Length; i++)
{
if (Types.TryGetValue(typeList.type_(i), out TypeInfo typeInfo))
{
string typeName = typeInfo.TypeName;
if (typeNames.Add(typeName))
{
string caseExpression = i > 0 ? $"{Environment.NewLine}{caseBlock}{Environment.NewLine}{Spacing()}case " : "";
if (typeName.Equals("nil", StringComparison.Ordinal))
{
caseTypeExpressions.Append($"{caseExpression}null:");
}
else
{
caseTypeExpressions.Append($"{caseExpression}{typeName} {identifier}:");
}
}
else
{
AddWarning(typeList, $"Skipped duplicate type info (from C# perspective) for type switch case statement: {typeList.GetText()}");
}
}
else
{
AddWarning(typeList, $"Failed to find type info for type switch case statement: {typeList.GetText()}");
}
}
// Replace type switch case type marker
m_targetFile.Replace(string.Format(TypeSwitchCaseTypeMarker, m_typeSwitchExpressionLevel), caseTypeExpressions.ToString());
}
}