Scope of constants - available in menus?

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After experimenting with basic Menus, I've decided that it's not possible to use constants in static menu expressions. Can anyone confirm or deny this?

I thought this might work at first but it had lots of problems with my kVerbosity constant - despite compilation, perhaps it's not substituted in the menu?

	Submenu "Set verbosity"
		"\\M0::Display current level", print num2istr(NumVarOrDefault("root:Packages:LTverbosity", kVerbosity))
		"\\M0::0 | Silent", /Q, lar_tools#setVerbosity(0)
		"\\M0::1 | Errors only", /Q, lar_tools#setVerbosity(1)
		"\\M0::2 | Updates on", /Q, lar_tools#setVerbosity(2)
	End


This version does work. I made my parameter optional and changed the return to a string reflecting current state

	Submenu "Set verbosity"
		"\\M0::Display current level", print lar_tools#setVerbosity()
		"\\M0::0 | Silent", /Q, print lar_tools#setVerbosity(level=0)
		"\\M0::1 | Errors only", /Q, print lar_tools#setVerbosity(level=1)
		"\\M0::2 | Updates on", /Q, print lar_tools#setVerbosity(level=2)
	End

This perplexed me for quite a while - it'd be helpful to understand exactly why so I can avoid running into the same mistake


Also, here's the revised function that's called if that helps:

//-------------------------------------------------------------------------------------------------------------------------------------------------------------
// setVerbosity( level )
//	
// Optional parameters
//	variable 	level 	numeric level already defined in constants (default: don't change the level)
//					0=kSilent	1=kError		2=kUpdate
//
// Returns string indicating verbosity level when function ends
 Function/S setVerbosity( [level] )	
	variable level 												// set to this level	
	If ( level<0 || level>kUpdate ) 								// if level out of range 
		return "Verbosity level was not changed"						// fail
	endif
	NVAR/Z verbose = root:Packages:LTverbosity 				// look up global holding current level
	If (!NVAR_exists(verbose)) 									// if not found
		DFREF savDF = GetDataFolderDFR() 						// save this spot
		NewDataFolder/O/S root:Packages							// make/switch to Packages folder
		variable/G LTverbosity = kVerbosity 						// create variable & set to hardcoded default
		SetDataFolder savDF 										// return to prior location
	endif
	If (ParamIsDefault(level))									// if level wasn't specified
		return "Verbosity is at level "+num2istr(verbose) 				// return current level
	else 													// otherwise
		verbose = level 											// set global to new level
		return "Verbosity set to level "+num2istr(level)				// return modified level
	endif
End