public void Visit(JsSwitchCase node)
{
if (node != null)
{
if (node.CaseValue != null)
{
node.CaseValue.Accept(this);
}
if (node.Statements != null)
{
node.Statements.Accept(this);
}
}
}
public void Visit(JsSwitchCase node)
{
// shoudn't get here
Debug.Fail("shouldn't get here");
}
public void Visit(JsSwitchCase node)
{
// shoudn't get here
Debug.Fail("shouldn't get here");
}
public void Visit(JsSwitchCase node)
{
// invalid! ignore
IsValid = false;
}
public void Visit(JsSwitchCase node)
{
// invalid! ignore
IsValid = false;
}
public void Visit(JsSwitchCase node)
{
// not applicable; terminate
}
public void Visit(JsSwitchCase node)
{
// not applicable; terminate
}
private JsAstNode ParseSwitchStatement()
{
JsContext switchCtx = m_currentToken.Clone();
JsAstNode expr = null;
JsAstNodeList cases = null;
var braceOnNewLine = false;
JsContext braceContext = null;
m_blockType.Add(BlockType.Switch);
try
{
// read switch(expr)
GetNextToken();
if (JsToken.LeftParenthesis != m_currentToken.Token)
ReportError(JsError.NoLeftParenthesis);
GetNextToken();
m_noSkipTokenSet.Add(NoSkipTokenSet.s_BlockConditionNoSkipTokenSet);
m_noSkipTokenSet.Add(NoSkipTokenSet.s_SwitchNoSkipTokenSet);
try
{
expr = ParseExpression();
if (JsToken.RightParenthesis != m_currentToken.Token)
{
ReportError(JsError.NoRightParenthesis);
}
GetNextToken();
if (JsToken.LeftCurly != m_currentToken.Token)
{
ReportError(JsError.NoLeftCurly);
}
braceOnNewLine = m_foundEndOfLine;
braceContext = m_currentToken.Clone();
GetNextToken();
}
catch (RecoveryTokenException exc)
{
if (IndexOfToken(NoSkipTokenSet.s_BlockConditionNoSkipTokenSet, exc) == -1
&& IndexOfToken(NoSkipTokenSet.s_SwitchNoSkipTokenSet, exc) == -1)
{
// give up
exc._partiallyComputedNode = null;
throw;
}
else
{
if (exc._partiallyComputedNode == null)
expr = new JsConstantWrapper(true, JsPrimitiveType.Boolean, CurrentPositionContext(), this);
else
expr = exc._partiallyComputedNode;
if (IndexOfToken(NoSkipTokenSet.s_BlockConditionNoSkipTokenSet, exc) != -1)
{
if (exc._token == JsToken.RightParenthesis)
GetNextToken();
if (JsToken.LeftCurly != m_currentToken.Token)
{
ReportError(JsError.NoLeftCurly);
}
braceOnNewLine = m_foundEndOfLine;
braceContext = m_currentToken.Clone();
GetNextToken();
}
}
}
finally
{
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_SwitchNoSkipTokenSet);
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_BlockConditionNoSkipTokenSet);
}
// parse the switch body
cases = new JsAstNodeList(CurrentPositionContext(), this);
bool defaultStatement = false;
m_noSkipTokenSet.Add(NoSkipTokenSet.s_BlockNoSkipTokenSet);
try
{
while (JsToken.RightCurly != m_currentToken.Token)
{
JsSwitchCase caseClause = null;
JsAstNode caseValue = null;
var caseCtx = m_currentToken.Clone();
JsContext colonContext = null;
m_noSkipTokenSet.Add(NoSkipTokenSet.s_CaseNoSkipTokenSet);
try
{
if (JsToken.Case == m_currentToken.Token)
{
// get the case
GetNextToken();
caseValue = ParseExpression();
}
else if (JsToken.Default == m_currentToken.Token)
{
// get the default
if (defaultStatement)
{
// we report an error but we still accept the default
ReportError(JsError.DupDefault, true);
}
else
{
defaultStatement = true;
}
GetNextToken();
}
else
{
// This is an error, there is no case or default. Assume a default was missing and keep going
defaultStatement = true;
ReportError(JsError.BadSwitch);
}
if (JsToken.Colon != m_currentToken.Token)
{
ReportError(JsError.NoColon);
}
else
{
colonContext = m_currentToken.Clone();
}
// read the statements inside the case or default
GetNextToken();
}
catch (RecoveryTokenException exc)
{
// right now we can only get here for the 'case' statement
if (IndexOfToken(NoSkipTokenSet.s_CaseNoSkipTokenSet, exc) == -1)
{
// ignore the current case or default
exc._partiallyComputedNode = null;
throw;
}
else
{
caseValue = exc._partiallyComputedNode;
if (exc._token == JsToken.Colon)
{
GetNextToken();
}
}
}
finally
{
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_CaseNoSkipTokenSet);
}
m_blockType.Add(BlockType.Block);
try
{
var statements = new JsBlock(m_currentToken.Clone(), this);
m_noSkipTokenSet.Add(NoSkipTokenSet.s_SwitchNoSkipTokenSet);
m_noSkipTokenSet.Add(NoSkipTokenSet.s_StartStatementNoSkipTokenSet);
try
{
while (JsToken.RightCurly != m_currentToken.Token && JsToken.Case != m_currentToken.Token && JsToken.Default != m_currentToken.Token)
{
try
{
// parse a Statement, not a SourceElement
statements.Append(ParseStatement(false));
}
catch (RecoveryTokenException exc)
{
if (exc._partiallyComputedNode != null)
{
statements.Append(exc._partiallyComputedNode);
exc._partiallyComputedNode = null;
}
if (IndexOfToken(NoSkipTokenSet.s_StartStatementNoSkipTokenSet, exc) == -1)
{
throw;
}
}
}
}
catch (RecoveryTokenException exc)
{
if (IndexOfToken(NoSkipTokenSet.s_SwitchNoSkipTokenSet, exc) == -1)
{
caseClause = new JsSwitchCase(caseCtx, this)
{
CaseValue = caseValue,
ColonContext = colonContext,
Statements = statements
};
cases.Append(caseClause);
throw;
}
}
finally
{
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_StartStatementNoSkipTokenSet);
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_SwitchNoSkipTokenSet);
}
caseCtx.UpdateWith(statements.Context);
caseClause = new JsSwitchCase(caseCtx, this)
{
CaseValue = caseValue,
ColonContext = colonContext,
Statements = statements
};
cases.Append(caseClause);
}
finally
{
m_blockType.RemoveAt(m_blockType.Count - 1);
}
}
}
catch (RecoveryTokenException exc)
{
if (IndexOfToken(NoSkipTokenSet.s_BlockNoSkipTokenSet, exc) == -1)
{
//save what you can a rethrow
switchCtx.UpdateWith(CurrentPositionContext());
exc._partiallyComputedNode = new JsSwitch(switchCtx, this)
{
Expression = expr,
BraceContext = braceContext,
Cases = cases,
BraceOnNewLine = braceOnNewLine
};
throw;
}
}
finally
{
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_BlockNoSkipTokenSet);
}
switchCtx.UpdateWith(m_currentToken);
GetNextToken();
}
finally
{
m_blockType.RemoveAt(m_blockType.Count - 1);
}
return new JsSwitch(switchCtx, this)
{
Expression = expr,
BraceContext = braceContext,
Cases = cases,
BraceOnNewLine = braceOnNewLine
};
}
public void Visit(JsSwitchCase node)
{
if (node != null)
{
if (node.CaseValue != null)
{
node.CaseValue.Accept(this);
}
if (node.Statements != null)
{
node.Statements.Accept(this);
}
}
}
public void Visit(JsSwitchCase node)
{
if (node != null)
{
var symbol = StartSymbol(node);
if (node.CaseValue != null)
{
Output("case");
MarkSegment(node, null, node.Context);
SetContextOutputPosition(node.Context);
m_startOfStatement = false;
node.CaseValue.Accept(this);
}
else
{
Output("default");
MarkSegment(node, null, node.Context);
SetContextOutputPosition(node.Context);
}
OutputPossibleLineBreak(':');
MarkSegment(node, null, node.ColonContext);
if (node.Statements != null && node.Statements.Count > 0)
{
Indent();
JsAstNode prevStatement = null;
for (var ndx = 0; ndx < node.Statements.Count; ++ndx)
{
var statement = node.Statements[ndx];
if (statement != null && !statement.HideFromOutput)
{
if (prevStatement != null && prevStatement.RequiresSeparator)
{
OutputPossibleLineBreak(';');
MarkSegment(prevStatement, null, prevStatement.TerminatingContext);
}
NewLine();
m_startOfStatement = true;
statement.Accept(this);
prevStatement = statement;
}
}
Unindent();
}
EndSymbol(symbol);
}
}
