public static string Create(MethodReference mRef, Resolver resolver, ICode ast)
{
if (mRef.ContainsGenericParameters())
{
throw new ArgumentException("Cannot create JS for method with open generic parameters");
}
var mDef = mRef.Resolve();
if (mDef.IsAbstract)
{
throw new ArgumentException("Should never need to transcode an abstract method");
}
var tRef = mRef.DeclaringType;
var tDef = tRef.Resolve();
var v = new JsMethod(resolver);
v.Visit(ast);
var js = v.js.ToString();
var sb = new StringBuilder();
// Method declaration
var methodName = resolver.MethodNames[mRef];
//var parameterNames = mRef.Parameters.Select(x => v.parameters.ValueOrDefault(x).NullThru(y => resolver.LocalVarNames[y])).ToArray();
// Match parameters, but have to do by position, as method built may be a custom method replacing a BCL method,
// so parameters are not the same.
var parameterNames = mRef.Parameters.Select(x => v.parameters.FirstOrDefault(y => y.Key.Sequence == x.Sequence).Value.NullThru(y => resolver.LocalVarNames[y])).ToArray();
if (!mDef.IsStatic)
{
var thisName = v.vars.FirstOrDefault(x => x.ExprType == Expr.NodeType.VarThis).NullThru(x => resolver.LocalVarNames[x]);
parameterNames = parameterNames.Prepend(thisName).ToArray();
}
var unusedParameterNameGen = new NameGenerator();
parameterNames = parameterNames.Select(x => x ?? ("_" + unusedParameterNameGen.GetNewName())).ToArray();
sb.AppendFormat("// {0}", mRef.FullName);
sb.AppendLine();
sb.AppendFormat("var {0} = function({1}) {{", methodName, string.Join(", ", parameterNames));
// Variable declarations
var declVars = v.vars
.Select(x => new { name = resolver.LocalVarNames[x], type = x.Type })
.Where(x => !parameterNames.Contains(x.name))
.Select(x => {
var name = x.name;
if (x.type.IsValueType)
{
name += " = " + DefaultValuer.Get(x.type, resolver.FieldNames);
}
return(name);
})
.Distinct() // Bit of a hack, but works for now
.ToArray();
if (declVars.Any())
{
sb.AppendLine();
sb.Append(' ', tabSize);
sb.AppendFormat("var {0};", string.Join(", ", declVars));
}
// Method body
sb.AppendLine(js);
// Method ending
sb.AppendLine("};");
var sbStr = sb.ToString();
return(sbStr);
}
