represents expr in pattern matching, requiring that expr be matched exactly as it appears, with no substitutions for blanks or other transformations.
- Verbatim[x_] will match only the actual expression x_.
- Verbatim is useful in setting up rules for transforming other transformation rules.
- Verbatim[expr] does not maintain expr in an unevaluated form.
Examplesopen allclose all
Basic Examples (2)
Match any expression:
Match only the pattern x_:
Changes the pattern only when it is explicitly f[x_]:
Transform a rule into a list of rules with special cases:
This rule transforms an expression into its square:
Use Verbatim to make rules specific for number types:
The list of specific rules only transforms integers, reals, and rationals: