private IList ConvertToSingleDeclarationStatements(MultipleVariableDeclarationStatement varDecl)
{
IList newStmts = new ArrayList();
int index = 0;
ExpressionCollection initExps = varDecl.InitExpressions;
foreach(Identifier ident in varDecl.Identifiers)
{
// Here we are converting expression from
// x:int, y:long = 1, 2L
// to an AST representation equivalent to
// x:int = 1; y:long = 2L
SingleVariableDeclarationStatement svStmt = new SingleVariableDeclarationStatement(ident);
if (index < initExps.Count)
{
svStmt.InitExp = initExps[index];
EnsureNoPostFixStatement(svStmt.InitExp);
}
index++;
newStmts.Add(svStmt);
}
// We don't need them anymore
initExps.Clear();
return newStmts;
}
private void EnsureTypeDeclarationsBelongsToThisScope(MultipleVariableDeclarationStatement varDecl, IList stmts)
{
ISymbolTable namescope = varDecl.Parent.SymbolTable;
System.Diagnostics.Debug.Assert( namescope != null );
foreach(SingleVariableDeclarationStatement typeDecl in stmts)
{
Identifier ident = typeDecl.Identifier;
// Most simple of cases: duplicated declaration
if (namescope.IsDefined(ident.Name))
{
errorReport.Error( "TODOFILENAME", typeDecl.Position, "Sorry but '{0}' is already defined.", ident.Name );
continue;
}
ApplyDeclarationRules(ident, namescope, typeDecl, varDecl);
}
}
private void ReplaceOriginalMultipleVariableDeclarationStatement(MultipleVariableDeclarationStatement decl, IList stmts)
{
int index;
// Replace the VariableDeclarationStatement node by a
// (possible) sequence of SingleVariableDeclarationStatement
IStatementContainer stmtContainer = decl.Parent as IStatementContainer;
index = stmtContainer.Statements.IndexOf(decl);
stmtContainer.Statements.RemoveAt(index);
foreach(SingleVariableDeclarationStatement svDecl in stmts)
{
stmtContainer.Statements.Insert( index++, svDecl );
}
}
private void ProcessMultipleVariableDeclarationStatement(MultipleVariableDeclarationStatement decl)
{
IList stmts = ConvertToSingleDeclarationStatements(decl);
ReplaceOriginalMultipleVariableDeclarationStatement(decl, stmts);
EnsureTypeDeclarationsBelongsToThisScope(decl, stmts);
}
public override bool VisitMultipleVariableDeclarationStatement(MultipleVariableDeclarationStatement varDecl)
{
ProcessMultipleVariableDeclarationStatement(varDecl);
return base.VisitMultipleVariableDeclarationStatement(varDecl);
}
public MultipleVariableDeclarationStatement declaration_statement() //throws RecognitionException, TokenStreamException
{
MultipleVariableDeclarationStatement stmt;
stmt = new MultipleVariableDeclarationStatement(currentAccessLevel);
Identifier ident = null;
IExpression initExp = null;
ident=identifier_withtype();
if (0==inputState.guessing)
{
stmt.AddIdentifier(ident);
}
{ // ( ... )*
for (;;)
{
if ((LA(1)==COMMA))
{
match(COMMA);
ident=identifier_withtype();
if (0==inputState.guessing)
{
stmt.AddIdentifier(ident);
}
}
else
{
goto _loop42_breakloop;
}
}
_loop42_breakloop: ;
} // ( ... )*
{
switch ( LA(1) )
{
case ASSIGN:
{
match(ASSIGN);
initExp=test();
if (0==inputState.guessing)
{
stmt.AddInitExp(initExp);
}
{ // ( ... )*
for (;;)
{
if ((LA(1)==COMMA))
{
match(COMMA);
initExp=test();
if (0==inputState.guessing)
{
stmt.AddInitExp(initExp);
}
}
else
{
goto _loop45_breakloop;
}
}
_loop45_breakloop: ;
} // ( ... )*
break;
}
case EOF:
case STATEMENT_END:
case SEMI:
{
break;
}
default:
{
throw new NoViableAltException(LT(1), getFilename());
}
}
}
return stmt;
}
