/// <summary>
/// Constructs function signature based on function name and
/// the function definitions found in the AST.
/// </summary>
public static ISignatureInfo MakeSignature(this IFunctionDefinition fd, string functionName) {
var si = new SignatureInfo(functionName);
si.Arguments = new List<IArgumentInfo>();
foreach (var arg in fd.Arguments) {
var na = arg as NamedArgument;
if (na != null) {
string defaultValue = na.DefaultValue != null ? fd.Root.TextProvider.GetText(na.DefaultValue) : string.Empty;
si.Arguments.Add(new ArgumentInfo(na.Name, string.Empty, defaultValue));
} else {
var ea = arg as ExpressionArgument;
if (ea != null && ea.Children.Count > 0) {
var exp = ea.Children[0] as IExpression;
if (exp != null && exp.Children.Count > 0) {
var v = exp.Children[0] as Variable;
if (v != null) {
si.Arguments.Add(new ArgumentInfo(v.Name));
}
}
}
}
}
return si;
}
private static ISignatureInfo ParseSignature(string functionName, ParseContext context, IReadOnlyDictionary<string, string> argumentsDescriptions = null) {
SignatureInfo info = new SignatureInfo(functionName);
List<IArgumentInfo> signatureArguments = new List<IArgumentInfo>();
// RD data may contain function name(s) without braces
if (context.Tokens.CurrentToken.TokenType == RTokenType.OpenBrace) {
FunctionCall functionCall = new FunctionCall();
functionCall.Parse(context, context.AstRoot);
for (int i = 0; i < functionCall.Arguments.Count; i++) {
IAstNode arg = functionCall.Arguments[i];
string argName = null;
string argDefaultValue = null;
bool isEllipsis = false;
bool isOptional = false;
ExpressionArgument expArg = arg as ExpressionArgument;
if (expArg != null) {
argName = context.TextProvider.GetText(expArg.ArgumentValue);
} else {
NamedArgument nameArg = arg as NamedArgument;
if (nameArg != null) {
argName = context.TextProvider.GetText(nameArg.NameRange);
argDefaultValue = RdText.CleanRawRdText(context.TextProvider.GetText(nameArg.DefaultValue));
} else {
MissingArgument missingArg = arg as MissingArgument;
if (missingArg != null) {
argName = string.Empty;
} else {
EllipsisArgument ellipsisArg = arg as EllipsisArgument;
if (ellipsisArg != null) {
argName = "...";
isEllipsis = true;
}
}
}
}
ArgumentInfo argInfo = new ArgumentInfo(argName);
argInfo.DefaultValue = argDefaultValue;
argInfo.IsEllipsis = isEllipsis;
argInfo.IsOptional = isOptional; // TODO: actually parse
if (argumentsDescriptions != null) {
string description;
if (argumentsDescriptions.TryGetValue(argName, out description)) {
argInfo.Description = description;
}
}
signatureArguments.Add(argInfo);
}
}
info.Arguments = signatureArguments;
return info;
}
