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psyntax: Add simple pattern matcher
* module/ice-9/psyntax.scm (simple-match1, simple-match-pat, simple-match-patv, match): Add simple pattern matcher. * module/ice-9/psyntax-pp.scm: Regenerate. Just different renumbering of temps.
This commit is contained in:
Andy Wingo
parent
d30b39e4ea
commit
d94292724b
2 changed files with 92 additions and 38 deletions
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@ -794,11 +794,11 @@
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(source-wrap e w (cdr w) mod)
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x))
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(else (decorate-source x))))))
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(let* ((t-680b775fb37a463-d6f transformer-environment)
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(t-680b775fb37a463-d70 (lambda (k) (k e r w s rib mod))))
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(let* ((t-680b775fb37a463-e6b transformer-environment)
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(t-680b775fb37a463-e6c (lambda (k) (k e r w s rib mod))))
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(with-fluid*
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t-680b775fb37a463-d6f
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t-680b775fb37a463-d70
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t-680b775fb37a463-e6b
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t-680b775fb37a463-e6c
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(lambda () (rebuild-macro-output (p (source-wrap e (anti-mark w) s mod)) (new-mark))))))))
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(expand-body
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(lambda (body outer-form r w mod)
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@ -1328,11 +1328,11 @@
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s
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mod
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get-formals
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(map (lambda (tmp-680b775fb37a463-feb
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tmp-680b775fb37a463-fea
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tmp-680b775fb37a463-fe9)
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(cons tmp-680b775fb37a463-fe9
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(cons tmp-680b775fb37a463-fea tmp-680b775fb37a463-feb)))
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(map (lambda (tmp-680b775fb37a463-10e7
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tmp-680b775fb37a463-10e6
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tmp-680b775fb37a463-10e5)
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(cons tmp-680b775fb37a463-10e5
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(cons tmp-680b775fb37a463-10e6 tmp-680b775fb37a463-10e7)))
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e2*
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e1*
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args*)))
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@ -1600,8 +1600,8 @@
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(apply (lambda (args e1 e2)
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(build-it
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'()
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(map (lambda (tmp-680b775fb37a463-63b tmp-680b775fb37a463-63a tmp-680b775fb37a463)
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(cons tmp-680b775fb37a463 (cons tmp-680b775fb37a463-63a tmp-680b775fb37a463-63b)))
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(map (lambda (tmp-680b775fb37a463-2 tmp-680b775fb37a463-1 tmp-680b775fb37a463)
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(cons tmp-680b775fb37a463 (cons tmp-680b775fb37a463-1 tmp-680b775fb37a463-2)))
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e2
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e1
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args)))
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@ -1611,8 +1611,9 @@
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(apply (lambda (docstring args e1 e2)
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(build-it
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(list (cons 'documentation (syntax->datum docstring)))
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(map (lambda (tmp-680b775fb37a463-1 tmp-680b775fb37a463 tmp-680b775fb37a463-64f)
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(cons tmp-680b775fb37a463-64f (cons tmp-680b775fb37a463 tmp-680b775fb37a463-1)))
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(map (lambda (tmp-680b775fb37a463-74d tmp-680b775fb37a463-74c tmp-680b775fb37a463-74b)
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(cons tmp-680b775fb37a463-74b
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(cons tmp-680b775fb37a463-74c tmp-680b775fb37a463-74d)))
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e2
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e1
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args)))
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@ -1632,8 +1633,8 @@
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(apply (lambda (args e1 e2)
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(build-it
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'()
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(map (lambda (tmp-680b775fb37a463-2 tmp-680b775fb37a463-1 tmp-680b775fb37a463)
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(cons tmp-680b775fb37a463 (cons tmp-680b775fb37a463-1 tmp-680b775fb37a463-2)))
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(map (lambda (tmp-680b775fb37a463-1 tmp-680b775fb37a463 tmp-680b775fb37a463-6ff)
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(cons tmp-680b775fb37a463-6ff (cons tmp-680b775fb37a463 tmp-680b775fb37a463-1)))
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e2
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e1
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args)))
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@ -1643,8 +1644,8 @@
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(apply (lambda (docstring args e1 e2)
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(build-it
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(list (cons 'documentation (syntax->datum docstring)))
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(map (lambda (tmp-680b775fb37a463-61b tmp-680b775fb37a463-61a tmp-680b775fb37a463)
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(cons tmp-680b775fb37a463 (cons tmp-680b775fb37a463-61a tmp-680b775fb37a463-61b)))
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(map (lambda (tmp-680b775fb37a463-2 tmp-680b775fb37a463-1 tmp-680b775fb37a463)
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(cons tmp-680b775fb37a463 (cons tmp-680b775fb37a463-1 tmp-680b775fb37a463-2)))
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e2
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e1
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args)))
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@ -2441,9 +2442,11 @@
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#f
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k
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(list docstring)
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(map (lambda (tmp-680b775fb37a463 tmp-680b775fb37a463-111f tmp-680b775fb37a463-111e)
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(list (cons tmp-680b775fb37a463-111e tmp-680b775fb37a463-111f)
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tmp-680b775fb37a463))
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(map (lambda (tmp-680b775fb37a463-121c
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tmp-680b775fb37a463-121b
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tmp-680b775fb37a463-121a)
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(list (cons tmp-680b775fb37a463-121a tmp-680b775fb37a463-121b)
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tmp-680b775fb37a463-121c))
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template
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pattern
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keyword)))
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@ -2632,9 +2635,9 @@
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(apply (lambda (p)
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(if (= lev 0)
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(quasiappend
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(map (lambda (tmp-680b775fb37a463-120a)
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(map (lambda (tmp-680b775fb37a463)
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(list "value"
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tmp-680b775fb37a463-120a))
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tmp-680b775fb37a463))
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p)
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(quasi q lev))
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(quasicons
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@ -2670,8 +2673,8 @@
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(apply (lambda (p)
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(if (= lev 0)
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(quasilist*
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(map (lambda (tmp-680b775fb37a463)
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(list "value" tmp-680b775fb37a463))
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(map (lambda (tmp-680b775fb37a463-131c)
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(list "value" tmp-680b775fb37a463-131c))
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p)
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(vquasi q lev))
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(quasicons
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@ -2774,8 +2777,8 @@
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(let ((tmp-1 ls))
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(let ((tmp ($sc-dispatch tmp-1 'each-any)))
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(if tmp
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(apply (lambda (t-680b775fb37a463-126e)
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(cons "vector" t-680b775fb37a463-126e))
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(apply (lambda (t-680b775fb37a463-136a)
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(cons "vector" t-680b775fb37a463-136a))
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tmp)
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(syntax-violation
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#f
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@ -2785,8 +2788,7 @@
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(let ((tmp-1 ($sc-dispatch tmp '(#(atom "quote") each-any))))
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(if tmp-1
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(apply (lambda (y)
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(k (map (lambda (tmp-680b775fb37a463-127a)
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(list "quote" tmp-680b775fb37a463-127a))
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(k (map (lambda (tmp-680b775fb37a463) (list "quote" tmp-680b775fb37a463))
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y)))
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tmp-1)
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(let ((tmp-1 ($sc-dispatch tmp '(#(atom "list") . each-any))))
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@ -2828,14 +2830,14 @@
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(let ((tmp-1 (list (emit (car x*)) (f (cdr x*)))))
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(let ((tmp ($sc-dispatch tmp-1 '(any any))))
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(if tmp
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(apply (lambda (t-680b775fb37a463-12ac
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t-680b775fb37a463-12ab)
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(apply (lambda (t-680b775fb37a463-13a8
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t-680b775fb37a463-13a7)
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(list (make-syntax
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'cons
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'((top))
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'(hygiene guile))
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t-680b775fb37a463-12ac
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t-680b775fb37a463-12ab))
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t-680b775fb37a463-13a8
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t-680b775fb37a463-13a7))
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tmp)
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(syntax-violation
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#f
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@ -2848,12 +2850,12 @@
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(let ((tmp-1 (map emit x)))
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(let ((tmp ($sc-dispatch tmp-1 'each-any)))
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(if tmp
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(apply (lambda (t-680b775fb37a463-12b8)
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(apply (lambda (t-680b775fb37a463-13b4)
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(cons (make-syntax
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'append
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'((top))
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'(hygiene guile))
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t-680b775fb37a463-12b8))
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t-680b775fb37a463-13b4))
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tmp)
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(syntax-violation
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#f
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@ -2866,12 +2868,12 @@
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(let ((tmp-1 (map emit x)))
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(let ((tmp ($sc-dispatch tmp-1 'each-any)))
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(if tmp
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(apply (lambda (t-680b775fb37a463-12c4)
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(apply (lambda (t-680b775fb37a463-13c0)
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(cons (make-syntax
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'vector
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'((top))
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'(hygiene guile))
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t-680b775fb37a463-12c4))
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t-680b775fb37a463-13c0))
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tmp)
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(syntax-violation
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#f
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@ -2882,12 +2884,12 @@
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(if tmp-1
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(apply (lambda (x)
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(let ((tmp (emit x)))
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(let ((t-680b775fb37a463-12d0 tmp))
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(let ((t-680b775fb37a463-13cc tmp))
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(list (make-syntax
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'list->vector
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'((top))
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'(hygiene guile))
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t-680b775fb37a463-12d0))))
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t-680b775fb37a463-13cc))))
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tmp-1)
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(let ((tmp-1 ($sc-dispatch tmp '(#(atom "value") any))))
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(if tmp-1
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@ -126,6 +126,58 @@
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(define-expansion-constructors)
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(define-expansion-accessors lambda src meta body)
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;; A simple pattern matcher based on Oleg Kiselyov's pmatch.
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(define-syntax-rule (simple-match e cs ...)
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(let ((v e)) (simple-match-1 v cs ...)))
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(define-syntax simple-match-1
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(syntax-rules ()
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((_ v) (error "value failed to match" v))
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((_ v (pat e0 e ...) cs ...)
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(let ((fk (lambda () (simple-match-1 v cs ...))))
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(simple-match-pat v pat (let () e0 e ...) (fk))))))
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(define-syntax simple-match-patv
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(syntax-rules ()
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((_ v idx () kt kf) kt)
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((_ v idx (x . y) kt kf)
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(simple-match-pat (vector-ref v idx) x
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(simple-match-patv v (1+ idx) y kt kf)
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kf))))
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(define-syntax simple-match-pat
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(syntax-rules (_ quote unquote ? and or not)
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((_ v _ kt kf) kt)
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((_ v () kt kf) (if (null? v) kt kf))
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((_ v #t kt kf) (if (eq? v #t) kt kf))
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((_ v #f kt kf) (if (eq? v #f) kt kf))
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((_ v (and) kt kf) kt)
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((_ v (and x . y) kt kf)
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(simple-match-pat v x (simple-match-pat v (and . y) kt kf) kf))
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((_ v (or) kt kf) kf)
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((_ v (or x . y) kt kf)
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(let ((tk (lambda () kt)))
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(simple-match-pat v x (tk) (simple-match-pat v (or . y) (tk) kf))))
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((_ v (not pat) kt kf) (simple-match-pat v pat kf kt))
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((_ v (quote lit) kt kf)
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(if (eq? v (quote lit)) kt kf))
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((_ v (? proc) kt kf) (simple-match-pat v (? proc _) kt kf))
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((_ v (? proc pat) kt kf)
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(if (proc v) (simple-match-pat v pat kt kf) kf))
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((_ v (x . y) kt kf)
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(if (pair? v)
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(let ((vx (car v)) (vy (cdr v)))
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(simple-match-pat vx x (simple-match-pat vy y kt kf) kf))
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kf))
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((_ v #(x ...) kt kf)
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(if (and (vector? v)
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(eq? (vector-length v) (length '(x ...))))
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(simple-match-patv v 0 (x ...) kt kf)
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kf))
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((_ v var kt kf) (let ((var v)) kt))))
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(define-syntax-rule (match e cs ...) (simple-match e cs ...))
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(define (top-level-eval x mod)
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(primitive-eval x))
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