protected virtual void RegisterTerminalFactory(Symbol symbol, SemanticTerminalFactory <T> factory)
{
if (symbol == null)
{
throw new ArgumentNullException("symbol");
}
if (symbol.Owner != grammar)
{
throw new ArgumentException("The symbol was defined on another grammar", "symbol");
}
if (symbol.Kind == SymbolKind.Nonterminal)
{
throw new ArgumentException("Terminal symbol factories can only build terminals and special symbols", "symbol");
}
if (factory == null)
{
throw new ArgumentNullException("factory");
}
AssertNotInitialized();
terminalFactories.Add(symbol, factory);
}
protected override void RegisterTerminalFactory(Symbol symbol, SemanticTerminalFactory <T> factory)
{
base.RegisterTerminalFactory(symbol, factory);
MemorizeType(factory, symbol);
}
public bool TryGetTerminalFactory(Symbol symbol, out SemanticTerminalFactory <T> factory)
{
Initialize();
return(terminalFactories.TryGetValue(symbol, out factory));
}
protected override void InitializeInternal(ICollection <string> errors, bool trace, bool strongParameterCheck)
{
foreach (Type type in typeof(T).Assembly.GetTypes())
{
if (typeof(T).IsAssignableFrom(type) && type.IsClass && (!type.IsAbstract))
{
SemanticTerminalFactory <T> terminalFactory = null;
foreach (TerminalAttribute terminalAttribute in type.GetCustomAttributes(typeof(TerminalAttribute), true))
{
Symbol symbol = terminalAttribute.Bind(Grammar);
if (symbol == null)
{
errors.Add(string.Format("Terminal {0} not found in grammar", terminalAttribute.SymbolName));
}
else
{
try {
Type factoryType = (terminalAttribute.IsGeneric) ? type.MakeGenericType(terminalAttribute.GenericTypes) : type;
if (terminalFactory == null)
{
terminalFactory = CreateTerminalFactory(factoryType);
}
RegisterTerminalFactory(symbol, terminalFactory);
if (factoryType != type)
{
terminalFactory = null; // don't keep generic factories
}
} catch (TargetInvocationException ex) {
errors.Add(string.Format("Terminal {0} factory problem: {1}", symbol, ex.InnerException.Message));
} catch (Exception ex) {
errors.Add(string.Format("Terminal {0} factory problem: {1}", symbol, ex.Message));
}
}
}
foreach (ConstructorInfo constructor in type.GetConstructors())
{
foreach (RuleAttribute ruleAttribute in constructor.GetCustomAttributes(typeof(RuleAttribute), true))
{
ProcessAttribute(errors, strongParameterCheck, ruleAttribute, type, constructor, GetConstructorFactoryType);
}
}
}
//examine the static methods
foreach (MethodInfo methodInfo in type.GetMethods())
{
if (typeof(T).IsAssignableFrom(methodInfo.ReturnType))
{
foreach (RuleAttribute ruleAttribute in methodInfo.GetCustomAttributes(typeof(RuleAttribute), true))
{
if (methodInfo.IsStatic)
{
ProcessAttribute(errors, strongParameterCheck, ruleAttribute, type, methodInfo, GetMethodFactoryType);
}
else
{
errors.Add(string.Format("Rule {0} is assigned to a non-static method, which is not allowed.", ruleAttribute.Rule));
}
}
}
}
}
// finally we look for all trim rules in the assembly
foreach (RuleTrimAttribute ruleTrimAttribute in typeof(T).Assembly.GetCustomAttributes(typeof(RuleTrimAttribute), false))
{
if ((ruleTrimAttribute.SemanticTokenType == null) || typeof(T).Equals(ruleTrimAttribute.SemanticTokenType))
{
Rule rule = ruleTrimAttribute.Bind(Grammar);
if (rule == null)
{
errors.Add(string.Format("Rule {0} not found in grammar", ruleTrimAttribute.Rule));
}
else
{
try {
RegisterNonterminalFactory(rule, new SemanticTrimFactory <T>(this, rule, ruleTrimAttribute.TrimSymbolIndex));
} catch (InvalidOperationException ex) {
errors.Add(string.Format("Trim tule {0} factory problem: {1}", rule, ex.Message));
}
}
}
}
}