How get a source code of anonymous method?
For example:
Func<Boolean> func = (() => DateTime.Now.Seconds % 2 == 0);
Console.WriteLine(GetSourceCode(func)); // must: DateTime.Now.Seconds % 2 == 0
String GetSourceCode<T>(Func<T> f) - ???
Asked
Active
Viewed 300 times
3
Horev Ivan
- 270
- 3
- 9
-
So `GetSourceCode` should return a `string`? Can i ask why you need it? – Tim Schmelter Mar 02 '13 at 12:15
-
You can't, you can only get the `MSIL` and decompile if you like. That's not lambada expressions. – Mark Segal Mar 02 '13 at 12:18
-
Yes GetSourceCode returns String. – Horev Ivan Mar 02 '13 at 12:20
-
I creating my unit test framework. I want to display source code of the failed tests. – Horev Ivan Mar 02 '13 at 12:22
-
1I think this is a [similar question - c# Can I use reflection to inspect the code in a method?][1] Hope this will help you. [1]: http://stackoverflow.com/questions/2693881/c-sharp-can-i-use-reflection-to-inspect-the-code-in-a-method – diogod Mar 02 '13 at 12:46
1 Answers
6
You can wrap it inside Expression and call ToString() on it and that will get you the source code.
Like this:
Expression<Func<Boolean>> func = (() => DateTime.Now.Seconds % 2 == 0);
var str = func.ToString();
The output str becomes
() => DateTime.Now.Seconds % 2 == 0
Davor Zlotrg
- 6,020
- 2
- 33
- 51
-
+1 Awesome, didn't know about this! output is `() => DateTime.Now.Second % 2 == 0` – Daniel Imms Mar 02 '13 at 13:21
-
1It's worth noting that technically this isn't a function. If you really do have a function you can't ever get it's source code as a string. – Servy Mar 26 '13 at 17:02