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dartdart-mirrors

How do I get a MethodMirror for the current function


Say I have

class RestSimulator {

@Path("/var")
void functionOne() {
  final Type type = this.runtimeType;
  final InstanceMirror instanceMirror = reflect(this);
  final ClassMirror classMirror = instanceMirror.type; 

  final MethodMirror methodMirror = ?????
  var metadata = methodMirror.metadata;
  var path = metadata.first.reflectee;

  print(path.toString()):
  }
}

How can I get the MethodMirror for the calling function???

[Update] I meant without doing something like

final MethodMirror methodMirror = functions[const Symbol('functionOne')];

So probably the main question is: How do I get the Symbol for the calling / current function?


Solution

  • AFAIK there's no simple way to get a reference on the current function at runtime.

    I say simple because you can get the name from a StackTrace but it's really ugly and has horrible performances...

    class A {
      m() {
        var functionName;
        try {
          throw '';
        } catch(e, s) {
          functionName = parseStackTraceToGetMethod(s.toString());
        }
        print(functionName); // displays A.m
      }
    }
    parseStackTraceToGetMethod(String s) =>
      s.substring(8, s.indexOf("("));
    
    main() {
      new A().m();
    }