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| author | David N. Welton <davidw@efn.org> | 1998-11-09 21:18:01 -0800 |
|---|---|---|
| committer | Bryan Newbold <bnewbold@robocracy.org> | 2017-02-20 00:05:27 -0800 |
| commit | 926b1b647ac830660933a5e63eb52d4a2552e264 (patch) | |
| tree | e25db5f6e1441d67f5d9af063432018ee20a5f51 /mwexpand.scm | |
| parent | b21cac3362022718634f7086964208b2eed8e897 (diff) | |
| parent | fa3f23105ddcf07c5900de47f19af43d1db1b597 (diff) | |
| download | slib-926b1b647ac830660933a5e63eb52d4a2552e264.tar.gz slib-926b1b647ac830660933a5e63eb52d4a2552e264.zip | |
Import Debian changes 2c3-3debian/2c3-3
slib (2c3-3) frozen unstable; urgency=low
* Fixes #16235.
* Fixes #19943.
* Fixes #20265.
* Fixes #24917.
* Fixes #27389.
slib (2c3-2) frozen unstable; urgency=low
* Re-uploaded for slink freeze.
slib (2c3-1) unstable; urgency=low
* New upstream release.
Diffstat (limited to 'mwexpand.scm')
| -rw-r--r-- | mwexpand.scm | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/mwexpand.scm b/mwexpand.scm index 10083a3..a53f0da 100644 --- a/mwexpand.scm +++ b/mwexpand.scm @@ -146,6 +146,8 @@ ((eq? keyword mw:denote-of-let-syntax) (mw:let-syntax exp env)) ((eq? keyword mw:denote-of-letrec-syntax) (mw:letrec-syntax exp env)) + ; @@ case has a nontrivial syntax also -- wdc + ((eq? keyword mw:denote-of-case) (mw:case exp env)) ; @@ let, let*, letrec, paint within quasiquotation -- kend ((eq? keyword mw:denote-of-let) (mw:let exp env)) ((eq? keyword mw:denote-of-let*) (mw:let* exp env)) @@ -394,6 +396,21 @@ exp) ) +; CASE -- added by wdc +(define (mw:case exp env) + (let ((expand (lambda (exp) + (mw:expand exp env)))) + (if (< (mw:safe-length exp) 3) + (mw:error "Malformed case expression" exp env) + `(case ,(expand (cadr exp)) + ,@(map (lambda (clause) + (if (< (mw:safe-length exp) 2) + (mw:error "Malformed case clause" exp env) + (cons (mw:strip (car clause)) + (map expand (cdr clause))))) + (cddr exp)))))) + + ; LET (define (mw:let exp env) (let* ( (name (if (or (pair? (cadr exp)) (null? (cadr exp))) |