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Re: Usage Messages in Mathematica
Posted:
Dec 28, 2012 5:33 AM


And yet usage messages for builtin objects seem to handle inline expressions and subscripts with aplomb. See, for example:
Subscript::usage
On Dec 27, 2012, at 5:04 AM, djmpark <djmpark@comcast.net> wrote:
> An extremely weak features of Mathematica is the design of Usage messages, > which seems to be stuck at Version 1, although the technology has moved far > beyond that. > > The present design is not up to the task and full of gotchas. For example, > how does one include a box structure, for example a subscripted symbol, > within a usage message? If one just enters a subscript then the first time > the message is displayed there are quotes around it and the second time the > quotes go away. If one starts an InlineCell within the string and enters the > expression then that problem goes away. If one then moves the usage > definition to a package and Runs the package it works OK. But if one saves > and closes the package, quits the kernel and then reinitializes, loading the > package, the usage message is defective giving the InputForm of the box > expression. Mathematica parses and changes the usage messages when the file > is read. > > The String form is just not adequate for usage messages. Nor is it adequate > to contain information on overloading functions. Usage definitions should be > expressions. Something like the following: > > Usage[FunctionName] = {{template, usageExpression}..} > > (The usageExpression might be a Row containing Strings and mathematical > expressions.)...
 Murray Eisenberg murray@math.umass.edu Mathematics & Statistics Dept. Lederle Graduate Research Tower phone 413 5491020 (H) University of Massachusetts 413 5452838 (W) 710 North Pleasant Street fax 413 5451801 Amherst, MA 010039305



