private static bool IsParameterSupported(OracleCodeCompletionFunctionOverload programOverload, int parameterIndex, string parameterName)
{
var namedParameterExists = GetNamedParameterIndex(programOverload, parameterName, out var namedParameterIndex);
if (programOverload.CurrentParameterIndex == namedParameterIndex)
{
return true;
}
return programOverload.CurrentParameterIndex == parameterIndex && !namedParameterExists;
}
private static bool HasSingleLiteralParameterOrNoParameterToken(OracleCodeCompletionFunctionOverload functionOverload, string literalTerminalId, int? parameterIndex)
{
parameterIndex = parameterIndex ?? functionOverload.CurrentParameterIndex;
if (parameterIndex >= functionOverload.ProgramReference.ParameterReferences.Count)
{
return functionOverload.ProgramReference.ParameterReferences.Count == parameterIndex;
}
var firstParameter = functionOverload.ProgramReference.ParameterReferences[parameterIndex.Value];
var parameterExpression = firstParameter.ParameterNode[NonTerminals.Expression];
return parameterExpression != null && parameterExpression.ChildNodes.Count == 1 && parameterExpression.ChildNodes[0].Id == literalTerminalId;
}
private static bool GetNamedParameterIndex(OracleCodeCompletionFunctionOverload programOverload, string parameterName, out int parameterIndex)
{
var namedParameterExists = false;
for (var i = 0; i < programOverload.ProgramReference.ParameterReferences.Count; i++)
{
var parameterReference = programOverload.ProgramReference.ParameterReferences[i];
if (parameterReference.OptionalIdentifierTerminal == null)
{
continue;
}
namedParameterExists = true;
if (String.Equals(parameterName, parameterReference.OptionalIdentifierTerminal.Token.Value.ToQuotedIdentifier()))
{
parameterIndex = i;
return true;
}
}
parameterIndex = -1;
return namedParameterExists;
}
private static bool HasSingleNumberLiteralParameterOrNoParameterToken(OracleCodeCompletionFunctionOverload functionOverload, int? parameterIndex = null)
{
return HasSingleLiteralParameterOrNoParameterToken(functionOverload, Terminals.NumberLiteral, parameterIndex);
}