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original commit: 1db3af01e4b49175bf7ea8980fbf7c5b88a29d40
This commit is contained in:
Robby Findler 2002-07-11 13:55:59 +00:00
parent da9689d146
commit a8b8242ae2
2 changed files with 217 additions and 91 deletions
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306
collects/framework/specs.ss
View File

@ -95,19 +95,62 @@
clause)]))
(syntax->list (syntax (clauses ...))))]))
(define (raise-error src-info to-blame fmt . args)
(error
'contract-error
(string-append (format "blame: ~a; contract established at: ~s ~s; "
to-blame
src-info
(syntax-object->datum src-info))
(apply format fmt args))))
;; raise-contract-error : (union syntax #f) symbol symbol string args ... -> alpha
;; doesn't return
(define (raise-contract-error src-info to-blame other-party fmt . args)
(let ([blame-src (if (syntax? src-info)
(let ([source (syntax-source src-info)]
[line (syntax-line src-info)]
[col (syntax-column src-info)]
[pos (syntax-position src-info)])
(cond
[(and (string? source) line col)
(format "~a: ~a.~a: " source line col)]
[(and line col)
(format "~a.~a: " line col)]
[(and (string? source) pos)
(format "~a: ~a: " source pos)]
[pos
(format "~a: " pos)]
[else ""]))
"")]
[specific-blame
(let ([datum (syntax-object->datum src-info)])
(if (symbol? datum)
(format "broke ~a's contract" datum)
"failed contract"))])
(raise
(make-exn
(string->immutable-string
(string-append (format "~a~a: ~a ~a: "
blame-src
other-party
to-blame
specific-blame)
(apply format fmt args)))
(current-continuation-marks)))))
;; contract = (make-contract (alpha sym sym sym -> alpha))
;; generic contract container
(define-struct contract (f))
;; flat-named-contract = (make-flat-named-contract string (any -> boolean))
;; this holds flat contracts that have names for error reporting
(define-struct flat-named-contract (type-name predicate))
(provide (rename build-flat-named-contract flat-named-contract)
flat-named-contract-type-name
flat-named-contract-predicate)
(define build-flat-named-contract
(let ([flat-named-contract
(lambda (name contract)
(unless (and (string? name)
(procedure? contract)
(procedure-arity-includes? contract 1))
(error 'flat-named-contract "expected string and procedure of one argument as arguments, given: ~e and ~e"
name contract))
(make-flat-named-contract name contract))])
flat-named-contract))
(define-syntax -contract
(lambda (stx)
(syntax-case stx ()
@ -129,7 +172,7 @@
[pos-blame pos-blame-e]
[src-info src-info-e])
(unless (-contract? a-contract)
(error 'contract "expected a contract as first argument, got: ~e, other args ~e ~e ~e ~e"
(error 'contract "expected a contract as first argument, given: ~e, other args ~e ~e ~e ~e"
a-contract
name
pos-blame
@ -137,13 +180,13 @@
src-info))
(unless (and (symbol? neg-blame)
(symbol? pos-blame))
(error 'contract "expected symbols as names for assigning blame, got: ~e and ~e, other args ~e ~e ~e"
(error 'contract "expected symbols as names for assigning blame, given: ~e and ~e, other args ~e ~e ~e"
neg-blame pos-blame
a-contract
name
src-info))
(unless (syntax? src-info)
(error 'contract "expected syntax as last argument, got: ~e, other args ~e ~e ~e ~e"
(error 'contract "expected syntax as last argument, given: ~e, other args ~e ~e ~e ~e"
src-info
neg-blame
pos-blame
@ -187,9 +230,9 @@
(let ([dom-x dom] ...
[rng-x rng])
(unless (-contract? dom-x)
(error '-> "expected contract as argument, got ~e" dom-x)) ...
(error '-> "expected contract as argument, given: ~e" dom-x)) ...
(unless (-contract? rng-x)
(error '-> "expected contract as argument, got: ~e" rng-x))
(error '-> "expected contract as argument, given: ~e" rng-x))
body))))]
[->body (syntax (->* (dom-x ...) (rng-x)))])
(let-values ([(->*add-outer-check ->*make-inner-check ->*make-body) (->*/h ->body)])
@ -223,19 +266,20 @@
(let ([dom-x dom] ...
[rng-x rng] ...)
(unless (-contract? dom-x)
(error '->* "expected contract as argument, got ~e" dom-x)) ...
(error '->* "expected contract as argument, given: ~e" dom-x)) ...
(unless (-contract? rng-x)
(error '->* "expected contract as argument, got: ~e" rng-x)) ...
(error '->* "expected contract as argument, given: ~e" rng-x)) ...
body))))
(lambda (stx)
(with-syntax ([(val pos-blame neg-blame src-info) stx])
(syntax
(unless (and (procedure? val)
(procedure-arity-includes? val arity))
(raise-error
(raise-contract-error
src-info
pos-blame
"expected a procedure that accepts ~a arguments, got: ~e"
neg-blame
"expected a procedure that accepts ~a arguments, given: ~e"
arity
val)))))
(lambda (stx)
@ -267,20 +311,21 @@
[dom-rest-x rest]
[rng-x rng] ...)
(unless (-contract? dom-x)
(error '->* "expected contract for domain position, got ~e" dom-x)) ...
(error '->* "expected contract for domain position, given: ~e" dom-x)) ...
(unless (-contract? dom-rest-x)
(error '->* "expected contract for rest position, got ~e" dom-rest-x))
(error '->* "expected contract for rest position, given: ~e" dom-rest-x))
(unless (-contract? rng-x)
(error '->* "expected contract for range position, got: ~e" rng-x)) ...
(error '->* "expected contract for range position, given: ~e" rng-x)) ...
body))))
(lambda (stx)
(with-syntax ([(val pos-blame neg-blame src-info) stx])
(syntax
(unless (procedure? val)
(raise-error
(raise-contract-error
src-info
pos-blame
"expected a procedure that accepts ~a arguments, got: ~e"
neg-blame
"expected a procedure that accepts ~a arguments, given: ~e"
arity
val)))))
(lambda (stx)
@ -318,10 +363,10 @@
(let ([dom-x dom] ...
[rng-x rng])
(unless (-contract? dom-x)
(error '->d "expected contract as argument, got ~e" dom-x)) ...
(error '->d "expected contract as argument, given: ~e" dom-x)) ...
(unless (and (procedure? rng-x)
(procedure-arity-includes? rng-x arity))
(error '->d "expected range portion to be a function that takes ~a arguments, got: ~e"
(error '->d "expected range portion to be a function that takes ~a arguments, given: ~e"
arity
rng-x))
body))))
@ -330,10 +375,11 @@
(syntax
(unless (and (procedure? val)
(procedure-arity-includes? val arity))
(raise-error
(raise-contract-error
src-info
pos-blame
"expected a procedure that accepts ~a arguments, got: ~e"
neg-blame
"expected a procedure that accepts ~a arguments, given: ~e"
arity
val)))))
(lambda (stx)
@ -342,7 +388,7 @@
((arg-x ...)
(let ([rng-contract (rng-x arg-x ...)])
(unless (-contract? rng-contract)
(error '->d "expected range portion to return a contract, got: ~e"
(error '->d "expected range portion to return a contract, given: ~e"
rng-contract))
(check-contract
rng-contract
@ -365,10 +411,10 @@
(let ([dom-x dom] ...
[rng-mk-x rng-mk])
(unless (-contract? dom-x)
(error '->*d "expected contract as argument, got ~e" dom-x)) ...
(error '->*d "expected contract as argument, given: ~e" dom-x)) ...
(unless (and (procedure? rng-mk-x)
(procedure-arity-includes? rng-mk-x arity))
(error '->*d "expected range position to be a procedure that accepts ~ arguments, got: ~e"
(error '->*d "expected range position to be a procedure that accepts ~a arguments, given: ~e"
arity rng-mk-x))
body))))
(lambda (stx)
@ -376,10 +422,11 @@
(syntax
(unless (and (procedure? val)
(procedure-arity-includes? val arity))
(raise-error
(raise-contract-error
src-info
pos-blame
"expected a procedure that accepts ~a arguments, got: ~e"
neg-blame
"expected a procedure that accepts ~a arguments, given: ~e"
arity
val)))))
(lambda (stx)
@ -398,7 +445,7 @@
(lambda results
(unless (= (length results) (length rng-contracts))
(error '->d*
"expected range contract contructor and function to have the same number of values, got ~a and ~a respectively"
"expected range contract contructor and function to have the same number of values, given: ~a and ~a respectively"
(length results) (length rng-contracts)))
(apply
values
@ -423,21 +470,22 @@
[dom-rest-x rest]
[rng-mk-x rng-mk])
(unless (-contract? dom-x)
(error '->*d "expected contract as argument, got ~e" dom-x)) ...
(error '->*d "expected contract as argument, given: ~e" dom-x)) ...
(unless (-contract? dom-rest-x)
(error '->*d "expected contract for rest argument, got ~e" dom-rest-x))
(error '->*d "expected contract for rest argument, given: ~e" dom-rest-x))
(unless (procedure? rng-mk-x)
(error '->*d "expected range position to be a procedure that accepts ~a arguments, got: ~e"
(error '->*d "expected range position to be a procedure that accepts ~a arguments, given: ~e"
arity rng-mk-x))
body))))
(lambda (stx)
(with-syntax ([(val pos-blame neg-blame src-info) stx])
(syntax
(unless (procedure? val)
(raise-error
(raise-contract-error
src-info
pos-blame
"expected a procedure that accepts ~a arguments, got: ~e"
neg-blame
"expected a procedure that accepts ~a arguments, given: ~e"
arity
val)))))
(lambda (stx)
@ -458,7 +506,7 @@
(lambda results
(unless (= (length results) (length rng-contracts))
(error '->d*
"expected range contract contructor and function to have the same number of values, got ~a and ~a respectively"
"expected range contract contructor and function to have the same number of values, given: ~a and ~a respectively"
(length results) (length rng-contracts)))
(apply
values
@ -606,6 +654,7 @@
(let ([contract?
(lambda (val)
(or (contract? val) ;; refers to struct predicate
(flat-named-contract? val)
(and (procedure? val)
(procedure-arity-includes? val 1))))])
contract?))
@ -614,21 +663,46 @@
(cond
[(contract? contract)
((contract-f contract) val pos neg src-info)]
[(flat-named-contract? contract)
(if ((flat-named-contract-predicate contract) val)
val
(raise-contract-error
src-info
pos
neg
"expected type <~a>, given: ~e"
(flat-named-contract-type-name contract)
val))]
[else
(if (contract val)
val
(raise-error
(raise-contract-error
src-info
pos
"predicate ~s failed for: ~e"
contract
val))]))
neg
"~agiven: ~e"
(predicate->type-name contract)
val))]))
;; predicate->type-name : function -> string
;; if the function has a name and the name ends
;; with a question mark, turn it into a mzscheme
;; style type name
(define (predicate->type-name pred)
(let* ([name (object-name pred)])
(if name
(let ([m (regexp-match "(.*)\\?" (symbol->string name))])
(if m
(format "expected type <~a>, " (cadr m))
""))
"")))
(provide union)
(define (union . args)
(for-each
(lambda (x)
(unless (-contract? x)
(error 'union "expected procedures of arity 1 or -> contracts, got: ~e" x)))
(error 'union "expected procedures of arity 1, flat-named-contracts, or -> contracts, given: ~e" x)))
args)
(let-values ([(contracts procs)
(let loop ([ctcs null]
@ -642,38 +716,43 @@
(loop ctcs (cons arg procs) (cdr args))))]))])
(unless (or (null? contracts)
(null? (cdr contracts)))
(error 'union "expected at most one function contract, got: ~e" args))
(error 'union "expected at most one function contract, given: ~e" args))
(make-contract
(lambda (val pos neg src-info)
(cond
[(ormap (lambda (proc) (proc val)) procs)
[(ormap (lambda (proc)
(if (flat-named-contract? proc)
((flat-named-contract-predicate proc) val)
(proc val)))
procs)
val]
[(null? contracts)
(raise-error src-info pos "union failed")]
(raise-contract-error src-info pos neg "union failed, given: ~e" val)]
[(null? (cdr contracts))
((contract-f (car contracts)) val pos neg src-info)])))))
(provide and/f or/f
>=/c <=/c </c >/c
natural-number?
false? any?
printable?
union symbols
symbols
subclass?/c implementation?/c is-a?/c
listof vectorof cons/p list/p
mixin-contract make-mixin-contract)
(define-syntax (name stx)
(syntax-case stx ()
[(_ name exp)
(syntax (let ([name exp])
name))]))
(define (symbols . ss)
(name symbols
(lambda (x)
(memq x ss))))
(unless ((length ss) . >= . 1)
(error 'symbols "expected at least one argument"))
(unless (andmap symbol? ss)
(error 'symbols "expected symbols as arguments, given: ~a"
(apply string-append (map (lambda (x) (format "~e " x)) ss))))
(make-flat-named-contract
(apply string-append
(format "'~a" (car ss))
(map (lambda (x) (format ", '~a" x)) (cdr ss)))
(lambda (x)
(memq x ss))))
(define (printable? x)
(or (symbol? x)
@ -693,57 +772,104 @@
(define (and/f . fs)
(for-each
(lambda (x)
(unless (and (procedure? x)
(procedure-arity-includes? x 1))
(error 'and/f "expected procedures of arity 1, got: ~e" x)))
(unless (or (flat-named-contract? x)
(and (procedure? x)
(procedure-arity-includes? x 1)))
(error 'and/f "expected procedures of arity 1 or <flat-named-contract>s, given: ~e" x)))
fs)
(name and/f
(lambda (x)
(andmap (lambda (f) (f x)) fs))))
(lambda (x)
(andmap (lambda (f)
(if (flat-named-contract? f)
((flat-named-contract-predicate f) x)
(f x)))
fs)))
(define (or/f . fs)
(for-each
(lambda (x)
(unless (and (procedure? x)
(procedure-arity-includes? x 1))
(error 'or/f "expected procedures of arity 1, got: ~e" x)))
(unless (or (flat-named-contract? x)
(and (procedure? x)
(procedure-arity-includes? x 1)))
(error 'or/f "expected procedures of arity 1 or <flat-named-contract>s, given: ~e" x)))
fs)
(name or/f
(lambda (x)
(ormap (lambda (f) (f x)) fs))))
(lambda (x)
(ormap (lambda (f)
(if (flat-named-contract? f)
((flat-named-contract-predicate f) x)
(f x)))
fs)))
(define (>=/c x) (name >=/c (lambda (y) (and (number? y) (>= y x)))))
(define (<=/c x) (name <=/c (lambda (y) (and (number? y) (<= y x)))))
(define (</c x) (name </c (lambda (y) (and (number? y) (< y x)))))
(define (>/c x) (name >/c (lambda (y) (and (number? y) (> y x)))))
(define (>=/c x)
(make-flat-named-contract
(format "number >= ~a" x)
(lambda (y) (and (number? y) (>= y x)))))
(define (<=/c x)
(make-flat-named-contract
(format "number <= ~a" x)
(lambda (y) (and (number? y) (<= y x)))))
(define (</c x)
(make-flat-named-contract
(format "number < ~a" x)
(lambda (y) (and (number? y) (< y x)))))
(define (>/c x)
(make-flat-named-contract
(format "number > ~a" x)
(lambda (y) (and (number? y) (> y x)))))
(define natural-number? (and/f number? integer? (>=/c 0)))
(define (natural-number? x)
(and (number? x)
(integer? x)
(x . >= . 0)))
(define (is-a?/c <%>) (name is-a?/c (lambda (x) (is-a? x <%>))))
(define (subclass?/c <%>) (name subclass?/c (lambda (x) (subclass? x <%>))))
(define (implementation?/c <%>) (name implementation?/c (lambda (x) (implementation? x <%>))))
(define (is-a?/c <%>)
(unless (or (interface? <%>)
(class? <%>))
(error 'is-a?/c "expected <interface> or <class>, given: ~e" <%>))
(let ([name (object-name <%>)])
(make-flat-named-contract
(if name
(format "instance of ~a" name)
"instance of <<unknown>>")
(lambda (x) (is-a? x <%>)))))
(define (subclass?/c %)
(unless (class? %)
(error 'subclass?/c "expected type <class>, given: ~e" %))
(let ([name (object-name %)])
(make-flat-named-contract
(if name
(format "subclass of ~a" name)
"subclass of <<unknown>>")
(lambda (x) (subclass? x %)))))
(define (implementation?/c <%>)
(unless (interface? <%>)
(error 'implementation?/c "expected <interface>, given: ~e" <%>))
(let ([name (object-name <%>)])
(make-flat-named-contract
(if name
(format "implementation of ~a" name)
"implementation of <<unknown>>")
(lambda (x) (implementation? x <%>)))))
(define (false? x) (not x))
(define (any? x) #t)
(define (listof p)
(name listof
(lambda (v)
(and (list? v)
(andmap p v)))))
(lambda (v)
(and (list? v)
(andmap p v))))
(define (vectorof p)
(name vectorof
(lambda (v)
(and (vector? v)
(andmap p (vector->list v))))))
(lambda (v)
(and (vector? v)
(andmap p (vector->list v)))))
(define (cons/p hdp tlp)
(name cons/p
(lambda (x)
(and (pair? x)
(hdp (car x))
(tlp (cdr x))))))
(lambda (x)
(and (pair? x)
(hdp (car x))
(tlp (cdr x)))))
(define (list/p . args)
(let loop ([args args])

2
collects/tests/framework/spec-test.ss
View File

@ -19,7 +19,7 @@
(test name
(lambda (x)
(and (string? x)
(let ([m (regexp-match "blame: ([^;]*);" x)])
(let ([m (regexp-match ": (.*) failed contract:" x)])
(equal? (cadr m) blame))))
(lambda ()
(send-sexp-to-mred `(with-handlers ([(lambda (x) (and (not-break-exn? x) (exn? x)))