http://d.puremagic.com/issues/show_bug.cgi?id=3879
Summary: compile-time assertion error in mtype.c: foreach through associative array w/ templated-class as value Product: D Version: 2.040 Platform: x86_64 OS/Version: Windows Status: NEW Severity: major Priority: P2 Component: DMD AssignedTo: nob...@puremagic.com ReportedBy: njb...@gmail.com --- Comment #0 from njb...@gmail.com 2010-03-04 11:10:38 PST --- I'm working on a file with these classes so far: abstract class State(T:GameEntity) { string _name; @property { const string name() const { return _name; } this(string name) { _name = name; } (and some empty virtual function decls that get defined by derived classes) } // and then the actual implementation for the various State nodes will be done through derived classes // so if I had a class DogRobot that derives from GameEntity, then it would // internally use a StateMachine!(DogRobot), which itself would be using // State!(DogRobot) for its states. Somewhere in DogRobot.d it would also // define those new State!(DogRobot)-derived classes that would then be // added to the State Machine via addState() class StateMachine(T:GameEntity) { ... State!(T)[string] _states; // THIS IS LINE 100 IN THE ERROR MESSAGES MENTIONED LATER -- assoc array for quickly retrieving states by their names // public, actual state objects added to the machine here void addState(State!(T) state) { ... (compiles fine) ... } void linkStates(string fromName, string toName, string eventName) { ... (compiles fine) ... } // so far so good, further down I have a function called printGraph() for debug output, and this is where I've run into assertion problems with DMD 2.040 compiler void printStates() { std.stdio.writefln("States:"); // each and every one of these below causes a compile-time error, // though different ones sometimes: // this leads to error: "__overloadset is not a template" on line 100 foreach (string key, State!(T); _states) std.stdio.writefln(" %1", key); // the rest of these each, individually, result in an assertion error // at compile-time which pops up twice. // In the actual code I commented-out the previous problematic lines // before trying the next approach/flavor. DMD 2.040 compiler's error // for each of these reads as follows: // // Assertion failure: 'impl' on line 3886 in file 'mtype.c' // // abnormal program termination // Assertion failure: 'impl' on line 3886 in file 'mtype.c' // // abnormal program termination // Various problematic code for THIS error is as follows: // first attempt foreach (string k; _states.keys) std.stdio.writefln(" %1", k); // approach #2 foreach (State!(T) s; _states.values) std.stdio.writefln(" %1", s.name); // approach #3, but char[] k for a string-type key is probably // incorrect in a different way I'm guessing... just a desperation try foreach (char[] k; _states.keys.sort) std.stdio.writefln(" %1", k); // approach #4 typedef State!(T) tstate; foreach (tstate s; _states.values) std.stdio.writefln(" %1", s.name); } // end printStates() } // end StateMachine class // end code snippet In the meantime I can probably get around this problem by getting rid of templates entirely and very carefully using delegates to act as "plugged-in behavior"... I was following the approach in an AI book I have, but there are other ways I can go about doing the same thing, I'm sure. -- Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email ------- You are receiving this mail because: -------