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don't use this-syntax in type pattern-expanders

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This commit is contained in:
AlexKnauth 2016-06-10 13:26:04 -04:00
parent 649342f101
commit bf517fd99f
1 changed files with 6 additions and 4 deletions
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10
tapl/typecheck.rkt
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@ -557,7 +557,8 @@
#'(~and expanded-τ
(~Any/bvs (~literal/else τ-internal
(format "Expected ~a type, got: ~a"
'τ (type->str #'expanded-τ)))
'τ (type->str #'expanded-τ))
#'expanded-τ)
(~and bvs (tv (... (... ...))))
. rst)
#,(if (attribute has-bvs?)
@ -573,7 +574,8 @@
#'(~and expanded-τ
(~Any/bvs (~literal/else τ-internal
(format "Expected ~a type, got: ~a"
'τ (type->str #'expanded-τ)))
'τ (type->str #'expanded-τ))
#'expanded-τ)
bvs-pat
. pat))])))
(define-syntax τ-expander*
@ -747,13 +749,13 @@
(define-syntax ~literal/else
(pattern-expander
(syntax-parser
[(_ lit:id fail-msg:expr)
[(_ lit:id fail-msg:expr stx)
#'(~and actual
(~parse
(~fail #:unless (and (identifier? #'actual)
(free-identifier=? #'actual #'lit))
fail-msg)
this-syntax))])))
stx))])))
; subst τ for y in e, if (bound-id=? x y)
(define (subst τ x e [cmp bound-identifier=?])
(syntax-parse e