public static BuildResult <ParserConfiguration <IN, OUT> > BuildExpressionRules <IN, OUT>(
ParserConfiguration <IN, OUT> configuration, Type parserClass,
BuildResult <ParserConfiguration <IN, OUT> > result) where IN : struct
{
var methods = parserClass.GetMethods().ToList();
methods = methods.Where(m =>
{
var attributes = m.GetCustomAttributes().ToList();
var attr = attributes.Find(a => a.GetType() == typeof(OperationAttribute));
return(attr != null);
}).ToList();
var operationsByPrecedence = new Dictionary <int, List <OperationMetaData <IN> > >();
methods.ForEach(m =>
{
var attributes =
(OperationAttribute[])m.GetCustomAttributes(typeof(OperationAttribute), true);
foreach (var attr in attributes)
{
IN oper = default;
if (attr.IsIntToken)
{
oper = EnumConverter.ConvertIntToEnum <IN>(attr.IntToken);
}
else if (attr.IsStringToken)
{
oper = EnumConverter.ConvertStringToEnum <IN>(attr.StringToken);
}
var operation = new OperationMetaData <IN>(attr.Precedence, attr.Assoc, m, attr.Affix, oper);
var operations = new List <OperationMetaData <IN> >();
if (operationsByPrecedence.ContainsKey(operation.Precedence))
{
operations = operationsByPrecedence[operation.Precedence];
}
operations.Add(operation);
operationsByPrecedence[operation.Precedence] = operations;
}
});
if (operationsByPrecedence.Count > 0)
{
var operandNonTerminal = GetOperandNonTerminal(parserClass, configuration, result);
if (operandNonTerminal != null && operationsByPrecedence.Count > 0)
{
GenerateExpressionParser(configuration, operandNonTerminal, operationsByPrecedence,
parserClass.Name);
}
}
result.Result = configuration;
return(result);
}
public static BuildResult <ParserConfiguration <IN, OUT> > BuildExpressionRules <IN, OUT>(
ParserConfiguration <IN, OUT> configuration, Type parserClass,
BuildResult <ParserConfiguration <IN, OUT> > result) where IN : struct
{
var methods = parserClass.GetMethods().ToList();
methods = methods.Where(m =>
{
var attributes = m.GetCustomAttributes().ToList();
var attr = attributes.Find(a => a.GetType() == typeof(OperationAttribute));
return(attr != null);
}).ToList();
var operationsByPrecedence = new Dictionary <int, List <OperationMetaData <IN> > >();
methods.ForEach(m =>
{
var attributes =
(OperationAttribute[])m.GetCustomAttributes(typeof(OperationAttribute), true);
foreach (var attr in attributes)
{
var operation = new OperationMetaData <IN>(attr.Precedence, attr.Assoc, m, attr.Affix,
ConvertIntToEnum <IN>(attr.Token));
var operations = new List <OperationMetaData <IN> >();
if (operationsByPrecedence.ContainsKey(operation.Precedence))
{
operations = operationsByPrecedence[operation.Precedence];
}
operations.Add(operation);
operationsByPrecedence[operation.Precedence] = operations;
}
});
if (operationsByPrecedence.Count > 0)
{
methods = parserClass.GetMethods().ToList();
var operandMethod = methods.Find(m =>
{
var attributes = m.GetCustomAttributes().ToList();
var attr = attributes.Find(a => a.GetType() == typeof(OperandAttribute));
return(attr != null);
});
string operandNonTerminal = null;
if (operandMethod == null)
{
result.AddError(new ParserInitializationError(ErrorLevel.FATAL, "missing [operand] attribute"));
throw new Exception("missing [operand] attribute");
}
var production =
operandMethod.GetCustomAttributes().ToList()
.Find(attr => attr.GetType() == typeof(ProductionAttribute)) as ProductionAttribute;
if (production != null)
{
var ruleItems = production.RuleString.Split(':');
if (ruleItems.Length > 0)
{
operandNonTerminal = ruleItems[0].Trim();
}
}
if (operandNonTerminal != null && operationsByPrecedence.Count > 0)
{
GenerateExpressionParser(configuration, operandNonTerminal, operationsByPrecedence,
parserClass.Name);
}
}
result.Result = configuration;
return(result);
}
