public override string WriteParseCode(TextWriter writer, ScriptParserGenerator generator)
{
IList <string> firsts = _innerExpression.GetFirstTerminals(generator);
IList <string> followings = this.GetFollowingTerminals(generator);
HashSet <string> firstSet = new HashSet <string>(firsts);
foreach (string following in followings)
{
if (firstSet.Contains(following))
{
string context = string.Format("'{0}' の定義", this.RootDefinition.DefinitionName);
string message = string.Format("省略可能な <{1}> の直後に <{0}> がありますが <{1}> の方が優先されます", following, this.ToString());
generator.Warn(context, message);
}
}
ParameterSignature returnParam = this.GetReturnParameterSignature(generator);
string returnType = returnParam.GetTypeName();
string returnVar;
writer.WriteLine(generator.GetCodeOfDeclareDefault(returnType, out returnVar));
string peekVar;
writer.WriteLine(generator.GetCodeOfPeek(out peekVar));
writer.WriteLine(generator.GetCodeOfIfOptionalLexisIn(peekVar, firsts));
string innerVar = _innerExpression.WriteParseCode(writer, generator);
writer.WriteLine(generator.GetCodeOfSubstitution(returnVar, innerVar));
writer.WriteLine(generator.GetCodeOfCloseBlock());
return(returnVar);
}
public override string WriteParseCode(TextWriter writer, ScriptParserGenerator generator)
{
if (false)
{
// 普通のコード
Debug.Assert(_candidates.Count >= 1);
if (_candidates.Count == 1)
{
return(_candidates.First().WriteParseCode(writer, generator));
}
else
{
IList <string> firsts = this.GetFirstTerminals(generator);
string peekVar;
writer.WriteLine(generator.GetCodeOfPeekOrThrow(this.RootDefinition.DefinitionName, firsts, out peekVar));
bool oneClassType;
ParameterSignature returnParam = GetReturnParameterSignature(generator, out oneClassType);
string returnType = returnParam.GetTypeName();
string returnVar;
writer.WriteLine(generator.GetCodeOfDeclareDefault(returnType, out returnVar));
Dictionary <string, string> usedFirsts = new Dictionary <string, string>();
foreach (ElementsElement elems in _candidates)
{
IList <string> innerFirsts = elems.GetFirstTerminals(generator);
foreach (string first in innerFirsts)
{
string usingPoint;
if (usedFirsts.TryGetValue(first, out usingPoint))
{
string context = string.Format("'{0}' の定義", this.RootDefinition.DefinitionName);
string message = string.Format("<{1}> 内の <{0}> は <{2}> によって隠されます", first, this.ToString(), usingPoint);
generator.Warn(context, message);
}
else
{
usedFirsts[first] = elems.ToString();
}
}
writer.WriteLine(generator.GetCodeOfIfLexisIn(peekVar, innerFirsts));
string candidateVar = elems.WriteParseCode(writer, generator);
if (oneClassType)
{
writer.WriteLine(generator.GetCodeOfSubstitution(returnVar, candidateVar));
}
else
{
string selectVar;
writer.WriteLine(generator.GetCodeOfDeclareNew(returnType, new[] { candidateVar }, out selectVar));
writer.WriteLine(generator.GetCodeOfSubstitution(returnVar, selectVar));
}
writer.Write(generator.GetCodeOfCloseBlock());
writer.Write(generator.GetCodeOfSingleElse());
}
writer.Write(generator.GetCodeOfOpenBlock());
writer.WriteLine(generator.GetCodeOfCloseBlock());
return(returnVar);
}
}
else
{
// 前半部分が同じSelectionをツリー状に探索するようにするために
// SelectionSubCandidateを作る
List <SelectionSubCandidate> subCandidates = new List <SelectionSubCandidate>();
foreach (ElementsElement candidate in _candidates)
{
subCandidates.Add(new SelectionSubCandidate(candidate));
}
bool oneClassType;
ParameterSignature returnParam = this.GetReturnParameterSignature(generator, out oneClassType);
string returnVariableName;
writer.WriteLine(generator.GetCodeOfDeclareDefault(returnParam.GetTypeName(), out returnVariableName));
SelectionSubCandidate.writeParseCodeAux(writer, generator, subCandidates, (candidateAtEmpty, writer2, generator2) => {
// 候補の要素が単一要素の場合はFixedListをnewしなくてよいので分ける
string resultVar;
if (candidateAtEmpty.OriginalElements.Elements.Count == 1)
{
resultVar = candidateAtEmpty.TemporaryVariables.First();
}
else
{
ParameterSignature returnParam2 = candidateAtEmpty.OriginalElements.GetReturnParameterSignature(generator2);
string typename = returnParam2.GetTypeName();
writer2.WriteLine(generator2.GetCodeOfDeclareNew(typename, candidateAtEmpty.TemporaryVariables, out resultVar));
}
bool oneClassReturn;
ParameterSignature tmpReturnParam = this.GetReturnParameterSignature(generator2, out oneClassReturn);
if (!oneClassReturn)
{
// 一回Selection<>を作成しないといけない
string tmpTypename = tmpReturnParam.GetTypeName();
string tmpResultVar;
writer.WriteLine(generator2.GetCodeOfDeclareNew(tmpTypename, new[] { resultVar }, out tmpResultVar));
resultVar = tmpResultVar;
}
writer2.WriteLine(generator.GetCodeOfSubstitution(returnVariableName, resultVar));
});
return(returnVariableName);
}
}
