public Signature(String name, Access access, IParseFunction func, Boolean isMemoized)
{
this.Name = name;
this.Access = access;
this.Func = func;
this.IsMemoized = isMemoized;
}
private static Invoker CreateStatelessInvoker(String baseName) => (i, p, s, f) => $"{baseName}({i}, {p})"; // Invocation
private Boolean AddSignature(IParseFunction target, Access access, Boolean requiresGeneration)
{
if (requiresGeneration || this.mustAddSignature)
{
this.signatures.Add(new Signature(baseName, access, target, isMemoized));
return(true);
}
return(false);
}
private void BasicTargetWithInterfaceMethod(IParseFunction target, InterfaceMethod interfaceMethod, Signature signature)
{
var resultName = "r";
var nodeName = $"{resultName}.Node";
var invoker = this.invokers[target];
writer.VarAssign(resultName, invoker("input", "inputPosition", "states", "factory")); // Invocation
writer.IfNullReturnNull(resultName);
var decl = new Decl(target.ReturnType, nodeName);
var returnExpression = GetReturnExpression(target.ReturnType, new[] { decl }, $"{resultName}.Advanced", "factory", interfaceMethod);
if (signature.IsMemoized)
{
var memField = NameGen.MemoizedFieldName(signature.Name);
returnExpression = $"states[inputPosition].{memField} = {returnExpression}";
}
writer.Return(returnExpression);
}
public (IParseFunction, IReadOnlyList <InterfaceMethod>) Visit(Selection target, INodeType input)
{
var interfaceMethods = new List <InterfaceMethod>();
var newSteps = new List <SelectionStep>();
foreach (var step in target.Steps)
{
IParseFunction func = step.Function;
INodeType funcReturnType = func.ReturnType;
InterfaceMethod interfaceMethod = null;
if (input != EmptyNodeType.Instance)
{
var name = $"{interfaceMethodName}{++count}";
interfaceMethod = new InterfaceMethod(input, name, GetParameterTypesFromReturnType(funcReturnType));
interfaceMethods.Add(interfaceMethod);
}
var newStep = new SelectionStep(func, interfaceMethod);
newSteps.Add(newStep);
}
return(new Selection(newSteps), interfaceMethods);
}
private void AddInvoker(IParseFunction target, Invoker invoker)
{
this.invokers[target] = invoker;
}
public SequenceStep(IParseFunction parseFunction, MatchAction matchAction)
{
this.Function = parseFunction;
this.MatchAction = matchAction;
}
public Series(IParseFunction repeatedToken, IParseFunction delimiterToken, InterfaceMethod interfaceMethod)
{
this.RepeatedToken = repeatedToken;
this.DelimiterToken = delimiterToken;
this.InterfaceMethod = interfaceMethod;
}
public Repetition(IParseFunction innerParseFunction, Cardinality cardinality, InterfaceMethod interfaceMethod)
{
this.InnerParseFunction = innerParseFunction;
this.Cardinality = cardinality;
this.InterfaceMethod = interfaceMethod;
}
public SelectionStep(IParseFunction parseFunction, InterfaceMethod interfaceMethod)
{
this.Function = parseFunction;
this.InterfaceMethod = interfaceMethod;
}
public static Rule WithParseFunction(this Rule rule, IParseFunction func) => new Rule(rule.RuleIdentifier, rule.ReturnType, func);
public Rule(String ruleIdentifier, INodeType returnType, IParseFunction parseFunction)
{
this.RuleIdentifier = ruleIdentifier;
this.ReturnType = returnType;
this.ParseFunction = parseFunction;
}