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I would like to create a shorthand for a compound markup command, say MVE

#(define-markup-command (shorthand layout props text) (number-or-markup?) (interpret-markup layout props #{ \markup \bold \italic #text #}))

However, this errors out with "error: not a markup" when passed a number. How would I type-coerce the argument into markup?

  • Adding a nested \markup is "unexpected".
  • \simple only takes strings to begin with.
  • Yes I know passing "number" avoids the issue but it's not ergonomic.
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2 Answers 2

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Well, instead of #text you could write #(if (number? text) (number->string text) text). The obvious idea #(format #f "~a" text) would fail if text happened to be a markup that isn't a string.

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Based on user73384 finding the core conversion function (number->string), I'm using

#(define-markup-command (to-markup layout props text) (number-or-markup?) (interpret-markup layout props #{ #(if (number? text) (number->string text) text) #}))

as a helper.

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