public SymbolTypeMap(SymbolTypeMap <T> parent)
{
this.parent = parent;
if (parent == null)
{
baseTypeCache = new Dictionary <Type, ReadOnlyCollection <Type> >();
}
}
protected virtual void CheckConsistency(ICollection <string> errors, bool trace)
{
SymbolTypeMap <T> symbolTypes = new SymbolTypeMap <T>();
// step 1: check that all terminals have a factory and register their output type
for (int i = 0; i < grammar.SymbolCount; i++)
{
Symbol symbol = grammar.GetSymbol(i);
if (symbol.Kind != SymbolKind.Nonterminal)
{
SemanticTerminalFactory <T> factory;
if (TryGetTerminalFactory(symbol, out factory))
{
// Debug.WriteLine(factory.OutputType.FullName, symbol.ToString());
if (symbolTypes.SetTypeForSymbol(symbol, factory.OutputType) && trace)
{
Trace.WriteLine(string.Format("Terminal {0} yields type {1}", symbol, symbolTypes.GetSymbolType(symbol)));
}
}
else
{
errors.Add(String.Format("Semantic token is missing for terminal {0}", symbol));
}
}
}
// step 2: check that all rules have a factory and register their output type
for (int i = 0; i < grammar.RuleCount; i++)
{
Rule rule = grammar.GetRule(i);
SemanticNonterminalFactory <T> factory;
if (TryGetNonterminalFactory(rule, out factory))
{
// Debug.WriteLine(factory.OutputType.FullName, rule.RuleSymbol.ToString());
if (symbolTypes.SetTypeForSymbol(rule.RuleSymbol, factory.OutputType) && trace)
{
Trace.WriteLine(string.Format("Rule {0} yields type {1} (static: {2})", rule, symbolTypes.GetSymbolType(rule.RuleSymbol), factory.IsStaticOutputType));
}
}
else
{
errors.Add(String.Format("Semantic token is missing for rule {0}", rule));
}
}
// step 3: check the input types of all rules
foreach (KeyValuePair <Rule, SemanticNonterminalFactory <T> > pair in nonterminalFactories)
{
ReadOnlyCollection <Type> inputTypes = pair.Value.InputTypes;
int index = 0;
foreach (Symbol inputSymbol in pair.Value.GetInputSymbols(pair.Key))
{
if (index < inputTypes.Count)
{
Type handleType = symbolTypes.GetSymbolType(inputSymbol);
if (!inputTypes[index].IsAssignableFrom(handleType))
{
errors.Add(string.Format("The factory for the type {0} used by rule {1} expects a {2} on index {3}, but receives a {4}", pair.Value.OutputType.FullName, pair.Key.Definition, inputTypes[index].FullName, index, handleType.FullName));
}
}
index++;
}
if (index != inputTypes.Count)
{
errors.Add(string.Format("The factory for the type {0} used by rule {1} has a mismatch of input symbol count ({2}) and type count ({3})", pair.Value.OutputType.FullName, pair.Key.Definition, index, inputTypes.Count));
}
}
}