public void Visit(ConstStatement node)
{
if (node != null)
{
// declarations get -1 position
node.Index = -1;
// the statement itself doesn't get executed, but the initializers do
for (var ndx = 0; ndx < node.Count; ++ndx)
{
var item = node[ndx];
if (item != null)
{
item.Accept(this);
}
}
}
}
public void Visit(ConstStatement node)
{
// invalid! ignore
IsValid = false;
}
public void Visit(ConstStatement node)
{
// invalid! ignore
IsValid = false;
}
public void Visit(ConstStatement node)
{
Debug.Fail("shouldn't get here");
}
public void Visit(ConstStatement node)
{
// not applicable; terminate
}
public void Visit(ConstStatement node)
{
if (node != null)
{
// declarations get -1 position
node.Index = -1;
// the statement itself doesn't get executed, but the initializers do
for (var ndx = 0; ndx < node.Count; ++ndx)
{
var item = node[ndx];
if (item != null)
{
item.Accept(this);
}
}
}
}
public void Visit(ConstStatement node)
{
Debug.Fail("shouldn't get here");
}
//---------------------------------------------------------------------------------------
// ParseVariableStatement
//
// VariableStatement :
// 'var' VariableDeclarationList
// or
// 'const' VariableDeclarationList
// or
// 'let' VariableDeclarationList
//
// VariableDeclarationList :
// VariableDeclaration |
// VariableDeclaration ',' VariableDeclarationList
//
// VariableDeclaration :
// Identifier Initializer
//
// Initializer :
// <empty> |
// '=' AssignmentExpression
//---------------------------------------------------------------------------------------
private AstNode ParseVariableStatement()
{
// create the appropriate statement: var- or const-statement
Declaration varList;
if (m_currentToken.Token == JSToken.Var)
{
varList = new Var(m_currentToken.Clone(), this);
}
else if (m_currentToken.Token == JSToken.Const || m_currentToken.Token == JSToken.Let)
{
if (m_currentToken.Token == JSToken.Const && m_settings.ConstStatementsMozilla)
{
varList = new ConstStatement(m_currentToken.Clone(), this);
}
else
{
varList = new LexicalDeclaration(m_currentToken.Clone(), this)
{
StatementToken = m_currentToken.Token
};
}
}
else
{
Debug.Fail("shouldn't get here");
return null;
}
bool single = true;
AstNode vdecl = null;
AstNode identInit = null;
for (; ; )
{
m_noSkipTokenSet.Add(NoSkipTokenSet.s_EndOfLineToken);
try
{
identInit = ParseIdentifierInitializer(JSToken.None);
}
catch (RecoveryTokenException exc)
{
// an exception is passing by, possibly bringing some info, save the info if any
if (exc._partiallyComputedNode != null)
{
if (!single)
{
varList.Append(exc._partiallyComputedNode);
varList.Context.UpdateWith(exc._partiallyComputedNode.Context);
exc._partiallyComputedNode = varList;
}
}
if (IndexOfToken(NoSkipTokenSet.s_EndOfLineToken, exc) == -1)
throw;
else
{
if (single)
identInit = exc._partiallyComputedNode;
}
}
finally
{
m_noSkipTokenSet.Remove(NoSkipTokenSet.s_EndOfLineToken);
}
if (identInit != null)
{
vdecl = identInit;
varList.Append(vdecl);
}
if (m_currentToken.Token == JSToken.Comma)
{
single = false;
vdecl.IfNotNull(d => d.TerminatingContext = m_currentToken.Clone());
}
else if (m_currentToken.Token == JSToken.Semicolon)
{
varList.TerminatingContext = m_currentToken.Clone();
GetNextToken();
break;
}
else if (m_foundEndOfLine || m_currentToken.Token == JSToken.RightCurly || m_currentToken.Token == JSToken.EndOfFile)
{
// semicolon insertion rules
// a right-curly or an end of line is something we don't WANT to throw a warning for.
// Just too common and doesn't really warrant a warning (in my opinion)
if (JSToken.RightCurly != m_currentToken.Token && JSToken.EndOfFile != m_currentToken.Token)
{
ReportError(JSError.SemicolonInsertion, varList.Context.IfNotNull(c => c.FlattenToEnd()), true);
}
break;
}
else
{
ReportError(JSError.NoSemicolon, false);
break;
}
}
if (vdecl != null)
{
varList.Context.UpdateWith(vdecl.Context);
}
return varList;
}
public void Visit(ConstStatement node)
{
// not applicable; terminate
}
public override void Visit(ConstStatement node)
{
if (node != null)
{
// we want to weed out duplicates
// var a=1, a=2 is okay, but var a, a=2 and var a=2, a should both be just var a=2,
// and var a, a should just be var a
for (int ndx = 0; ndx < node.Count; ++ndx)
{
string thisName = node[ndx].Identifier;
// we just want to throw an error if there are any duplicates.
// we don't want to REMOVE anything, because we don't know if the browsers that
// implement this non-standard statement do first-win or last-win.
for (var ndx2 = ndx + 1; ndx2 < node.Count; ++ndx2)
{
if (string.CompareOrdinal(thisName, node[ndx2].Identifier) == 0)
{
node[ndx2].Context.HandleError(JSError.DuplicateConstantDeclaration, true);
}
}
}
// recurse the analyze
base.Visit(node);
}
}