1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
|
/***************************************************************************************************
Copyright (C) 2025 The Qt Company Ltd.
SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
***************************************************************************************************/
using System.Collections.Concurrent;
namespace Qt.DotNet.CodeGeneration
{
using System.Diagnostics;
using Utils.Collections.Concurrent;
public abstract class MetaFunction : IPrioritizable<int>
{
protected abstract string Eval(object src, Enum traits);
public virtual int Priority => 0;
protected virtual string Sanitize(string evalResult) => evalResult;
private ConcurrentSet<string> Exceptions { get; } = new();
protected string Unsafe(string value)
{
Exceptions.Add(value);
return value;
}
private static ConcurrentPriorityList<MetaFunction, int> MetaFunctions { get; } = new();
public static void Register<T>(T mFn) where T : MetaFunction
{
MetaFunctions.Add(mFn);
}
public static void Register<T>() where T : MetaFunction, new() => Register(new T());
private static ConcurrentDictionary<
(object Source, Enum Traits), string> Cache { get; } = new();
private enum DefaultTrait { Default = 0 }
public static string Evaluate<T>(T src, Enum traits = null)
where T : class
{
traits ??= DefaultTrait.Default;
if (Cache.TryGetValue((src, traits), out var cachedValue))
return cachedValue;
foreach (var mFn in MetaFunctions) {
if (mFn.Eval(src, traits) is not { } value)
continue;
if (!mFn.Exceptions.Contains(value))
value = mFn.Sanitize(value);
Cache.TryAdd((src, traits), value);
return value;
}
Debug.Assert(false, $"No MetaFunction matched for '{src}' with traits '{traits}'");
return src.ToString();
}
public static Type TypeOf(string name) => Rule.TypeOf(name);
public static Type TypeOf(Type t) => Rule.TypeOf(t);
public static Type TypeOf<T>() => Rule.TypeOf<T>();
protected const char Wrap = Placeholder.Wrap;
}
public static class MetaFunctionExtensions
{
public static bool HasTraits<T>(this Enum self, T traits)
where T : struct, Enum
{
if (self.GetType() == typeof(T))
return ((T)self).HasFlag(traits);
return ((T)Enum.ToObject(typeof(T), Convert.ToInt64(self))).HasFlag(traits);
}
public static bool TryRegisterAsMetaFunction(this Type mFnType)
{
if (!mFnType.IsAssignableTo(typeof(MetaFunction)))
return false;
if (!mFnType.IsClass || mFnType.IsAbstract)
return false;
if (Activator.CreateInstance(mFnType) is not MetaFunction mFn)
return false;
MetaFunction.Register(mFn);
return true;
}
public static string MFn(this object self, Enum traits = null)
{
return MetaFunction.Evaluate(self, traits);
}
}
}
|
