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Introduction
Matchable is a drop-in compatible replacement for Chicken's MATCH macro. All forms are provided under the same name, and all features except the ..k pattern are supported.
In addition, matchable supports non-linear patterns, i.e. patterns where an identifier occurs multiple times, requiring all instances of the identifier to be EQUAL?. For example:
(x _ x)
matches all lists of three elements whose first and third elements are the same.
For full documentation, see Pattern matching. However, the match-error-control and match-error-procedure procedures have no impact. A failure to match always signal an error.
Requirements
syntax-case or syntactic-closures
License
public domain
History
- 1.41
- added syntax-error macro & specialized for Chicken [Kon Lovett]
- 1.3
- updated to change in syntactic-closures 0.91
- 1.2
- bugfix, now all tests pass with syntactic-closures
- 1.1
- works now with syntactic-closures
- 1.0
- initial release