public static bool TryParseNode(Genero4glParser parser, out InputAttribute node, bool isArray)
{
node = new InputAttribute();
node.StartIndex = parser.Token.Span.Start;
bool result = true;
switch (parser.PeekToken().Kind)
{
case TokenKind.BlackKeyword:
case TokenKind.BlueKeyword:
case TokenKind.CyanKeyword:
case TokenKind.GreenKeyword:
case TokenKind.MagentaKeyword:
case TokenKind.RedKeyword:
case TokenKind.WhiteKeyword:
case TokenKind.YellowKeyword:
case TokenKind.BoldKeyword:
case TokenKind.DimKeyword:
case TokenKind.InvisibleKeyword:
case TokenKind.NormalKeyword:
case TokenKind.ReverseKeyword:
case TokenKind.BlinkKeyword:
case TokenKind.UnderlineKeyword:
parser.NextToken();
break;
case TokenKind.AcceptKeyword:
case TokenKind.CancelKeyword:
case TokenKind.UnbufferedKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
ExpressionNode boolExpr;
if (!FglExpressionNode.TryGetExpressionNode(parser, out boolExpr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
parser.ReportSyntaxError("Invalid boolean expression found in input attribute.");
}
}
break;
}
case TokenKind.CountKeyword:
case TokenKind.MaxCountKeyword:
{
if (isArray)
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
ExpressionNode boolExpr;
if (!FglExpressionNode.TryGetExpressionNode(parser, out boolExpr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
parser.ReportSyntaxError("Invalid expression found in input attribute.");
}
}
else
{
parser.ReportSyntaxError("Expected integer expression in input array attribute.");
}
}
else
{
parser.ReportSyntaxError("Attribute can only be used for an input array statement.");
}
break;
}
case TokenKind.WithoutKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.DefaultsKeyword))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected \"defaults\" keyword in input attribute.");
}
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
ExpressionNode boolExpr;
if (!FglExpressionNode.TryGetExpressionNode(parser, out boolExpr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
parser.ReportSyntaxError("Invalid boolean expression found in input attribute.");
}
}
break;
}
case TokenKind.HelpKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected equals token in input attribute.");
}
// get the help number
ExpressionNode optionNumber;
if (!FglExpressionNode.TryGetExpressionNode(parser, out optionNumber))
{
parser.ReportSyntaxError("Invalid help-number found in input attribute.");
}
break;
}
case TokenKind.NameKeyword:
{
if (!isArray)
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected equals token in input attribute.");
}
// get the help number
ExpressionNode optionNumber;
if (!FglExpressionNode.TryGetExpressionNode(parser, out optionNumber))
{
parser.ReportSyntaxError("Invalid dialog name found in input attribute.");
}
}
else
{
parser.ReportSyntaxError("The name attribute can only be used for an input statement (not an input array statement).");
}
break;
}
case TokenKind.FieldKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.OrderKeyword))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected \"order\" keyword in input attribute.");
}
if (parser.PeekToken(TokenKind.FormKeyword))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected \"form\" keyword in input attribute.");
}
break;
}
case TokenKind.AppendKeyword:
case TokenKind.DeleteKeyword:
case TokenKind.InsertKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.RowKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
ExpressionNode boolExpr;
if (!FglExpressionNode.TryGetExpressionNode(parser, out boolExpr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
parser.ReportSyntaxError("Invalid boolean expression found in input array attribute.");
}
}
}
else
{
parser.ReportSyntaxError("Expected \"row\" keyword in input array attribute.");
}
break;
}
case TokenKind.KeepKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.CurrentKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.RowKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
ExpressionNode boolExpr;
if (!FglExpressionNode.TryGetExpressionNode(parser, out boolExpr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
parser.ReportSyntaxError("Invalid boolean expression found in input array attribute.");
}
}
}
else
{
parser.ReportSyntaxError("Expected \"row\" keyword in input array attribute.");
}
}
else
{
parser.ReportSyntaxError("Expected \"current\" keyword in input array attribute.");
}
break;
}
case TokenKind.AutoKeyword:
{
parser.NextToken();
if (parser.PeekToken(TokenKind.AppendKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.Equals))
{
parser.NextToken();
ExpressionNode boolExpr;
if (!FglExpressionNode.TryGetExpressionNode(parser, out boolExpr, new List <TokenKind> {
TokenKind.Comma, TokenKind.RightParenthesis
}))
{
parser.ReportSyntaxError("Invalid boolean expression found in input array attribute.");
}
}
}
else
{
parser.ReportSyntaxError("Expected \"append\" keyword in input array attribute.");
}
break;
}
default:
result = false;
break;
}
if (result && node != null)
{
node.EndIndex = parser.Token.Span.End;
}
return(result);
}
public static bool TryParseNode(Genero4glParser parser, out InputBlock node,
IModuleResult containingModule,
List <Func <PrepareStatement, bool> > prepStatementBinders,
Func <ReturnStatement, ParserResult> returnStatementBinder = null,
Action <IAnalysisResult, int, int> limitedScopeVariableAdder = null,
List <TokenKind> validExitKeywords = null,
IEnumerable <ContextStatementFactory> contextStatementFactories = null,
HashSet <TokenKind> endKeywords = null)
{
node = null;
bool result = false;
if (parser.PeekToken(TokenKind.InputKeyword))
{
result = true;
node = new InputBlock();
parser.NextToken();
node.StartIndex = parser.Token.Span.Start;
node.VariableList = new List <FglNameExpression>();
node.FieldList = new List <FglNameExpression>();
node.Attributes = new List <InputAttribute>();
if (parser.PeekToken(TokenKind.ByKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.NameKeyword))
{
parser.NextToken();
// Implicit field mapping
node.IsImplicitMapping = true;
}
else
{
parser.ReportSyntaxError("Expected \"name\" token in input statement.");
}
}
else if (parser.PeekToken(TokenKind.ArrayKeyword))
{
parser.NextToken();
node.IsArray = true;
FglNameExpression arrName;
if (FglNameExpression.TryParseNode(parser, out arrName))
{
node.ArrayName = arrName;
}
else
{
parser.ReportSyntaxError("Invalid array name found in input statement.");
}
}
node.DecoratorEnd = parser.Token.Span.End;
FglNameExpression nameExpr;
if (!node.IsArray)
{
// read the variable list
while (FglNameExpression.TryParseNode(parser, out nameExpr))
{
node.VariableList.Add(nameExpr);
if (!parser.PeekToken(TokenKind.Comma))
{
break;
}
parser.NextToken();
}
}
if (parser.PeekToken(TokenKind.WithoutKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.DefaultsKeyword))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expected \"defaults\" token in input statement.");
}
}
if (!node.IsImplicitMapping || node.IsArray)
{
if (parser.PeekToken(TokenKind.FromKeyword))
{
parser.NextToken();
// read the field list
while (FglNameExpression.TryParseNode(parser, out nameExpr))
{
node.FieldList.Add(nameExpr);
if (node.IsArray || !parser.PeekToken(TokenKind.Comma))
{
break;
}
parser.NextToken();
}
}
else
{
parser.ReportSyntaxError("Expected \"from\" token in input statement.");
}
}
if (parser.PeekToken(TokenKind.AttributesKeyword) || parser.PeekToken(TokenKind.AttributeKeyword))
{
parser.NextToken();
if (parser.PeekToken(TokenKind.LeftParenthesis))
{
parser.NextToken();
// get the list of display or control attributes
InputAttribute attrib;
while (InputAttribute.TryParseNode(parser, out attrib, node.IsArray))
{
node.Attributes.Add(attrib);
if (!parser.PeekToken(TokenKind.Comma))
{
break;
}
parser.NextToken();
}
if (parser.PeekToken(TokenKind.RightParenthesis))
{
parser.NextToken();
}
else
{
parser.ReportSyntaxError("Expecting right-paren in input attributes section.");
}
}
else
{
parser.ReportSyntaxError("Expecting left-paren in input attributes section.");
}
}
if (parser.PeekToken(TokenKind.HelpKeyword))
{
parser.NextToken();
// get the help number
ExpressionNode optionNumber;
if (FglExpressionNode.TryGetExpressionNode(parser, out optionNumber))
{
node.HelpNumber = optionNumber;
}
else
{
parser.ReportSyntaxError("Invalid help-number found in input statement.");
}
}
List <TokenKind> validExits = new List <TokenKind>();
if (validExitKeywords != null)
{
validExits.AddRange(validExits);
}
validExits.Add(TokenKind.InputKeyword);
HashSet <TokenKind> newEndKeywords = new HashSet <TokenKind>();
if (endKeywords != null)
{
newEndKeywords.AddRange(endKeywords);
}
newEndKeywords.Add(TokenKind.InputKeyword);
bool hasControlBlocks = false;
InputControlBlock icb;
prepStatementBinders.Insert(0, node.BindPrepareCursorFromIdentifier);
while (InputControlBlock.TryParseNode(parser, out icb, containingModule, hasControlBlocks, node.IsArray, prepStatementBinders, returnStatementBinder,
limitedScopeVariableAdder, validExits, contextStatementFactories, newEndKeywords) && icb != null)
{
if (icb.StartIndex < 0)
{
continue;
}
node.Children.Add(icb.StartIndex, icb);
hasControlBlocks = true;
if (parser.PeekToken(TokenKind.EndOfFile) ||
(parser.PeekToken(TokenKind.EndKeyword) && parser.PeekToken(TokenKind.InputKeyword, 2)))
{
break;
}
}
prepStatementBinders.RemoveAt(0);
if (hasControlBlocks ||
(parser.PeekToken(TokenKind.EndKeyword) && parser.PeekToken(TokenKind.InputKeyword, 2)))
{
if (!(parser.PeekToken(TokenKind.EndKeyword) && parser.PeekToken(TokenKind.InputKeyword, 2)))
{
parser.ReportSyntaxError("A input block must be terminated with \"end input\".");
}
else
{
parser.NextToken(); // advance to the 'end' token
parser.NextToken(); // advance to the 'input' token
node.EndIndex = parser.Token.Span.End;
}
}
}
return(result);
}
