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| author | Arun Isaac | 2023-12-01 22:34:03 +0000 |
|---|---|---|
| committer | Arun Isaac | 2023-12-01 22:35:23 +0000 |
| commit | 770b738fe62112fc16c5213bd5769a8a54074fc7 (patch) | |
| tree | a704111e059737002c3c6a558ffc3449382e7fa0 /ccwl | |
| parent | ed207cdbdace951595a18548b77bc38fb3f1c6ef (diff) | |
| download | ccwl-770b738fe62112fc16c5213bd5769a8a54074fc7.tar.gz ccwl-770b738fe62112fc16c5213bd5769a8a54074fc7.tar.lz ccwl-770b738fe62112fc16c5213bd5769a8a54074fc7.zip | |
ccwl: Implement identity construct.
* ccwl/ccwl.scm (collect-steps): Implement identity construct.
* doc/ccwl.skb (Cookbook)[The identity construct]: New section.
* doc/identity-construct.scm: New file.
Diffstat (limited to 'ccwl')
| -rw-r--r-- | ccwl/ccwl.scm | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/ccwl/ccwl.scm b/ccwl/ccwl.scm index d00609d..bbc5de1 100644 --- a/ccwl/ccwl.scm +++ b/ccwl/ccwl.scm @@ -625,7 +625,7 @@ supplied input keys." output keys and a list of steps. INPUT-KEYS is a list of supplied input keys. Keys are represented by <key> objects, and steps are represented by <step> objects." - (syntax-case x (pipe tee rename scatter scatter-cross scatter-nested-cross) + (syntax-case x (pipe tee identity rename scatter scatter-cross scatter-nested-cross) ;; pipe ((pipe expressions ...) (foldn (lambda (expression input-keys steps) @@ -638,6 +638,8 @@ represented by <step> objects." ((tee expressions ...) (append-mapn (cut collect-steps <> input-keys) #'(expressions ...))) + ((identity) + (values input-keys (list))) ;; rename keys (base case) ((rename new-key old-key) (begin |