debugger should work without ()

[phillipskevin]

@phillipskevin commented on Wed Feb 14 2018

This should work to all the debugger helper so that it works like every other built-in helper:

{{debugger}}

To make this work, we'll probably need to do the same thing that we do with {{default}}: https://github.com/canjs/can-stache/blob/bcb5b78623276d95c582cce83d14c51d84707114/helpers/core.js#L245-L256

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@christopherjbaker commented on Thu Mar 01 2018

I added this to the debuggerHelper

canReflect.assignSymbols(debuggerHelper, {
	"can.isValueLike": true,
	"can.isFunctionLike": false,
	"can.getValue": function() {
		return this();
	}
});

however this is resulting it in being called with no arguments (since it has this() and the getValue function also has no arguments), so the get function will not work.

Also, in addition to the two logs that the debugger outputs (Use get() to debug this template and Forgotten {{debugger}} helper), it is also outputting can-stache/expressions/lookup.js: Unable to find key "debugger". I can fix this by returning a truthy value, but I think this will output to the page, which I think is undesirable.

[phillipskevin]

Going to make debugger a reserved scope key so that {{debugger}} will call the stache debugger helper with the correct scope.