Added support of collection initializer syntax.

[holdenmai]

Implementation of collection initializer syntax support for constructor #194 Copied a little bit of conflicting code from pull 245.

You can now write

var target = new Interpreter();
target.Reference(typeof(System.Collections.Generic.List<>));
var intList = target.Eval<System.Collections.Generic.List<int>>("new List<int>(){1, 2, 3, 4, 5}");
Assert.AreEqual(5, intList.Count);
for (int i = 0; i < intList.Count; ++i)
{
    Assert.AreEqual(i + 1, intList[i]);
}

as well as implementations supporting multiple parameters in the Add method such as

new MyClassAdder(){{ 1, 2, 3, 4, 5},{\"6\" },7 }
and
new Dictionary<int, string>(){{1, \"1\"}, {2, \"2\"}, {3, \"3\"}, {4, \"4\"}, {5, \"5\"}}

[metoule]

This looks really good, thank you!! The only problem I can see is that you can't use any expression that starts with an identifier in the collection initializer list:

new List<string> { string.Empty }

is valid, but not accepted with your code.

[metoule]

I understand why you perform the check, but that's a bit limiting, because an identifier can be used:

new List<string> { string.Empty } 

You can peek at the next token to check if it's a equal sign: if it's not, you can use SetTextPos to restart parsing at the wanted location and call ParseExpressionSegment.

[holdenmai]

I was having some trouble getting that to work when I was trying to account for the invalid case of
new MyClassAdder(){{StrProp = "SomeValue"}}
but I will try again according to your review comments

[holdenmai]

Resolved in latest commit.

Also accounted for the ability to perform collection of the .Add while simultaneously setting a variable/parameter value even if that matches a property/field name.

var target = new Interpreter();
			target.Reference(typeof(MyClassAdder));
			Assert.DoesNotThrow(() => target.Eval<MyClassAdder>("new MyClassAdder(){{ 1, 2, 3, 4, 5},{StrProp = \"6\" },7}", new Parameter("StrProp", "0")));

This is the equivalent of

string StrProp = "";
var mc = new MyClassAdder()
{
{1,2,3 },
{StrProp = "6" }
};
       
Assert.AreEqual(StrProp, "6")

[holdenmai]

I was so focused on the improvements around the checking of the additional cases, I missed the original List work.

[davideicardi]

Thank you @holdenmai . Also remember to update/rebase your branch so that we will not have conflicts during merge.