public override void LeaveYieldStatement(YieldStatement node)
{
if (node.Expression == null)
return;
TryToReify(node.Expression, GeneratorItemTypeFrom(_currentMethod.ReturnType) ?? TypeSystemServices.ObjectArrayType);
}
override public object Clone()
{
YieldStatement clone = (YieldStatement)FormatterServices.GetUninitializedObject(typeof(YieldStatement));
clone._lexicalInfo = _lexicalInfo;
clone._endSourceLocation = _endSourceLocation;
clone._documentation = _documentation;
clone._isSynthetic = _isSynthetic;
clone._entity = _entity;
if (_annotations != null)
{
clone._annotations = (Hashtable)_annotations.Clone();
}
if (null != _modifier)
{
clone._modifier = _modifier.Clone() as StatementModifier;
clone._modifier.InitializeParent(clone);
}
if (null != _expression)
{
clone._expression = _expression.Clone() as Expression;
clone._expression.InitializeParent(clone);
}
return(clone);
}
public override void OnYieldStatement(YieldStatement node)
{
_hasYieldStatements = true;
}
public override void LeaveYieldStatement(YieldStatement node)
{
if (EntityType.Constructor == _currentMethod.EntityType)
{
Error(CompilerErrorFactory.YieldInsideConstructor(node));
return;
}
_currentMethod.AddYieldStatement(node);
}
protected YieldStatement yield_stmt() //throws RecognitionException, TokenStreamException
{
YieldStatement s;
IToken yt = null;
s = null;
Expression e = null;
try { // for error handling
yt = LT(1);
match(YIELD);
{
switch ( LA(1) )
{
case ESEPARATOR:
case CAST:
case CHAR:
case FALSE:
case NOT:
case NULL:
case SELF:
case SUPER:
case THEN:
case TRUE:
case TYPEOF:
case TRIPLE_QUOTED_STRING:
case LPAREN:
case DOUBLE_QUOTED_STRING:
case SINGLE_QUOTED_STRING:
case ID:
case MULTIPLY:
case LBRACK:
case COMMA:
case SPLICE_BEGIN:
case DOT:
case LBRACE:
case QQ_BEGIN:
case SUBTRACT:
case LONG:
case INCREMENT:
case DECREMENT:
case ONES_COMPLEMENT:
case INT:
case BACKTICK_QUOTED_STRING:
case RE_LITERAL:
case DOUBLE:
case FLOAT:
case TIMESPAN:
{
e=array_or_expression();
break;
}
case EOL:
case IF:
case UNLESS:
case WHILE:
case EOS:
case RBRACE:
case QQ_END:
{
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
if (0==inputState.guessing)
{
s = new YieldStatement(ToLexicalInfo(yt));
s.Expression = e;
}
}
catch (RecognitionException ex)
{
if (0 == inputState.guessing)
{
reportError(ex, "yield_stmt");
recover(ex,tokenSet_90_);
}
else
{
throw ex;
}
}
return s;
}
override public void LeaveYieldStatement(YieldStatement node)
{
TryStatementInfo currentTry = (_tryStatementStack.Count > 0) ? _tryStatementStack.Peek() : null;
if (currentTry != null) {
ConvertTryStatement(currentTry);
}
Block block = new Block();
block.Add(
new ReturnStatement(
node.LexicalInfo,
CreateYieldInvocation(node.LexicalInfo, _labels.Count, node.Expression),
null));
block.Add(CreateLabel(node));
// setting the state back to the "running" state not required, as that state has the same ensure blocks
// as the state we are currently in.
// if (currentTry != null) {
// block.Add(SetStateTo(currentTry._stateNumber));
// }
ReplaceCurrentNode(block);
}
public override void OnYieldStatement(YieldStatement node)
{
if (_state.TryBlockDepth == _state.ProtectedBlockDepth) {
// we are currently only in the protected blocks, not in any "except" or "ensure" blocks.
foreach (TryStatement tryBlock in _state.TryBlocks) {
// only allow yield in the try part of try-ensure blocks, fail if it is a try-except block
if (tryBlock.FailureBlock != null || tryBlock.ExceptionHandlers.Count > 0) {
Error(CompilerErrorFactory.YieldInsideTryExceptOrEnsureBlock(node));
break;
}
}
} else {
Error(CompilerErrorFactory.YieldInsideTryExceptOrEnsureBlock(node));
}
}
override public object Clone()
{
YieldStatement clone = new YieldStatement();
clone._lexicalInfo = _lexicalInfo;
clone._endSourceLocation = _endSourceLocation;
clone._documentation = _documentation;
clone._isSynthetic = _isSynthetic;
clone._entity = _entity;
if (_annotations != null) clone._annotations = (Hashtable)_annotations.Clone();
if (null != _modifier)
{
clone._modifier = _modifier.Clone() as StatementModifier;
clone._modifier.InitializeParent(clone);
}
if (null != _expression)
{
clone._expression = _expression.Clone() as Expression;
clone._expression.InitializeParent(clone);
}
return clone;
}
public void AddYieldStatement(YieldStatement stmt)
{
if (null == _yieldStatements) _yieldStatements = new List();
_yieldStatements.Add(stmt);
}
public override void LeaveYieldStatement(YieldStatement node)
{
if (null == node.Expression) return;
CheckExpressionType(node.Expression);
}
public override void LeaveYieldStatement(YieldStatement node)
{
LeaveStatement(node);
}
public override void OnYieldStatement(YieldStatement node)
{
noReturnStatement = false;
IProjectContent pc = context != null ? context.ProjectContent : ParserService.CurrentProjectContent;
IReturnType enumerable = new GetClassReturnType(pc, "System.Collections.Generic.IEnumerable", 1);
// Prevent creating an infinite number of InferredReturnTypes in inferring cycles
parentReturnType.expression = new NullLiteralExpression();
IReturnType returnType;
if (node.Expression == null)
returnType = ConvertVisitor.GetDefaultReturnType(pc);
else
returnType = new BooResolver().GetTypeOfExpression(node.Expression, context);
if (returnType != null) {
returnType.GetUnderlyingClass(); // force to infer type
}
if (parentReturnType.expression == null) {
// inferrence cycle with parentReturnType
returnType = new GetClassReturnType(pc, "?", 0);
}
parentReturnType.expression = null;
result = new ConstructedReturnType(enumerable, new IReturnType[] { returnType });
}
public override void OnYieldStatement(YieldStatement node)
{
WriteIndented();
WriteKeyword("yield ");
Visit(node.Expression);
Visit(node.Modifier);
WriteLine();
}
public void yield_statement(Block b)
{
IToken token = null;
try
{
Expression expression;
token = this.LT(1);
this.match(0x30);
if (tokenSet_16_.member(this.LA(1)) && tokenSet_49_.member(this.LA(2)))
{
expression = this.expression();
}
else if (!tokenSet_15_.member(this.LA(1)) || !tokenSet_20_.member(this.LA(2)))
{
throw new NoViableAltException(this.LT(1), this.getFilename());
}
if (base.inputState.guessing == 0)
{
YieldStatement statement;
YieldStatement statement1 = statement = new YieldStatement(ToLexicalInfo(token));
statement.set_Expression(expression);
b.Add(statement);
}
}
catch (RecognitionException exception)
{
if (base.inputState.guessing != 0)
{
throw;
}
this.reportError(exception);
this.recover(exception, tokenSet_15_);
}
}
