250 lines
14 KiB
Racket
250 lines
14 KiB
Racket
#lang scheme/base
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(require mzlib/etc
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scheme/match
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scheme/contract
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scheme/list
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racket/set)
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#| Unresolved issues
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what are the booleans in lexical-rename?
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contracts that are probably too generous:
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prefix-stxs
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provided-nom-src
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lam-num-params
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lexical-rename-alist
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all-from-module
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|#
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;; ----------------------------------------
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;; Structures to represent bytecode
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(define-syntax-rule (define-form-struct* id id+par ([field-id field-contract] ...))
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(begin
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(define-struct id+par (field-id ...) #:prefab)
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#;(provide (struct-out id))
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(provide/contract
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[struct id ([field-id field-contract] ...)])))
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(define-struct zo () #:prefab)
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(provide (struct-out zo))
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(define-syntax define-form-struct
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(syntax-rules ()
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[(_ (id sup) . rest)
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(define-form-struct* id (id sup) . rest)]
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[(_ id . rest)
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(define-form-struct* id (id zo) . rest)]))
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;; In toplevels of resove prefix:
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(define-form-struct global-bucket ([name symbol?])) ; top-level binding
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(define-form-struct module-variable ([modidx module-path-index?]
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[sym symbol?]
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[pos exact-integer?]
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[phase (or/c 0 1)])) ; direct access to exported id
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;; Syntax object
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(define ((alist/c k? v?) l)
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(let loop ([l l])
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(match l
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[(list) #t]
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[(list* (? k?) (? v?) l)
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(loop l)]
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[_ #f])))
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(define mark-map?
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(alist/c number? module-path-index?)
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#;(hash/c number? module-path-index?))
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(define-form-struct wrap ())
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(define-form-struct wrapped ([datum any/c]
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[wraps (listof wrap?)]
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[tamper-status (or/c 'clean 'armed 'tainted)]))
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;; In stxs of prefix:
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(define-form-struct stx ([encoded wrapped?]))
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(define-form-struct prefix ([num-lifts exact-nonnegative-integer?]
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[toplevels (listof (or/c #f symbol? global-bucket? module-variable?))]
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[stxs list?])) ; should be (listof stx?) sets up top-level and syntax-object array
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(define-form-struct form ())
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(define-form-struct (expr form) ())
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(define-form-struct compilation-top ([max-let-depth exact-nonnegative-integer?] [prefix prefix?] [code (or/c form? any/c)])) ; compiled code always wrapped with this
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;; A provided identifier
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(define-form-struct provided ([name symbol?]
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[src (or/c module-path-index? #f)]
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[src-name symbol?]
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[nom-src any/c] ; should be (or/c module-path-index? #f)
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[src-phase exact-nonnegative-integer?]
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[protected? boolean?]))
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(define-form-struct (toplevel expr) ([depth exact-nonnegative-integer?]
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[pos exact-nonnegative-integer?]
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[const? boolean?]
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[ready? boolean?])) ; access binding via prefix array (which is on stack)
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(define-form-struct (seq form) ([forms (listof (or/c form? any/c))])) ; `begin'
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(define-form-struct (seq-for-syntax form) ([forms (listof (or/c form? any/c))] ; `begin-for-syntax'
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[prefix prefix?]
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[max-let-depth exact-nonnegative-integer?]
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[dummy (or/c toplevel? #f)]))
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(define-form-struct (inline-variant form) ([direct expr?]
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[inline expr?]))
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;; Definitions (top level or within module):
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(define-form-struct (def-values form) ([ids (listof (or/c toplevel? symbol?))]
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[rhs (or/c expr? seq? inline-variant? any/c)]))
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(define-form-struct (def-syntaxes form) ([ids (listof (or/c toplevel? symbol?))]
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[rhs (or/c expr? seq? any/c)]
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[prefix prefix?]
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[max-let-depth exact-nonnegative-integer?]
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[dummy (or/c toplevel? #f)]))
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(define-form-struct (mod form) ([name (or/c symbol? (listof symbol?))]
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[srcname symbol?]
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[self-modidx module-path-index?]
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[prefix prefix?]
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[provides (listof (list/c (or/c exact-integer? #f)
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(listof provided?)
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(listof provided?)))]
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[requires (listof (cons/c (or/c exact-integer? #f)
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(listof module-path-index?)))]
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[body (listof (or/c form? any/c))]
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[syntax-bodies (listof (cons/c exact-positive-integer?
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(listof (or/c def-syntaxes? seq-for-syntax?))))]
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[unexported (listof (list/c exact-nonnegative-integer?
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(listof symbol?)
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(listof symbol?)))]
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[max-let-depth exact-nonnegative-integer?]
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[dummy toplevel?]
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[lang-info (or/c #f (vector/c module-path? symbol? any/c))]
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[internal-context (or/c #f #t stx?)]
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[pre-submodules (listof mod?)]
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[post-submodules (listof mod?)]))
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(define-form-struct (lam expr) ([name (or/c symbol? vector? empty?)]
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[flags (listof (or/c 'preserves-marks 'is-method 'single-result
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'only-rest-arg-not-used 'sfs-clear-rest-args))]
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[num-params exact-nonnegative-integer?]
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[param-types (listof (or/c 'val 'ref 'flonum))]
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[rest? boolean?]
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[closure-map (vectorof exact-nonnegative-integer?)]
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[closure-types (listof (or/c 'val/ref 'flonum))]
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[toplevel-map (or/c #f (set/c exact-nonnegative-integer?))]
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[max-let-depth exact-nonnegative-integer?]
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[body (or/c expr? seq? any/c)])) ; `lambda'
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(define-form-struct (closure expr) ([code lam?] [gen-id symbol?])) ; a static closure (nothing to close over)
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(define-form-struct (case-lam expr) ([name (or/c symbol? vector? empty?)] [clauses (listof (or/c lam? closure?))]))
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(define-form-struct (let-one expr) ([rhs (or/c expr? seq? any/c)] [body (or/c expr? seq? any/c)] [flonum? boolean?] [unused? boolean?])) ; pushes one value onto stack
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(define-form-struct (let-void expr) ([count exact-nonnegative-integer?] [boxes? boolean?] [body (or/c expr? seq? any/c)])) ; create new stack slots
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(define-form-struct (install-value expr) ([count exact-nonnegative-integer?]
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[pos exact-nonnegative-integer?]
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[boxes? boolean?]
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[rhs (or/c expr? seq? any/c)]
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[body (or/c expr? seq? any/c)])) ; set existing stack slot(s)
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(define-form-struct (let-rec expr) ([procs (listof lam?)] [body (or/c expr? seq? any/c)])) ; put `letrec'-bound closures into existing stack slots
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(define-form-struct (boxenv expr) ([pos exact-nonnegative-integer?] [body (or/c expr? seq? any/c)])) ; box existing stack element
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(define-form-struct (localref expr) ([unbox? boolean?] [pos exact-nonnegative-integer?] [clear? boolean?] [other-clears? boolean?] [flonum? boolean?])) ; access local via stack
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(define-form-struct (topsyntax expr) ([depth exact-nonnegative-integer?] [pos exact-nonnegative-integer?] [midpt exact-nonnegative-integer?])) ; access syntax object via prefix array (which is on stack)
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(define-form-struct (application expr) ([rator (or/c expr? seq? any/c)] [rands (listof (or/c expr? seq? any/c))])) ; function call
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(define-form-struct (branch expr) ([test (or/c expr? seq? any/c)] [then (or/c expr? seq? any/c)] [else (or/c expr? seq? any/c)])) ; `if'
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(define-form-struct (with-cont-mark expr) ([key (or/c expr? seq? any/c)]
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[val (or/c expr? seq? any/c)]
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[body (or/c expr? seq? any/c)])) ; `with-continuation-mark'
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(define-form-struct (beg0 expr) ([seq (listof (or/c expr? seq? any/c))])) ; `begin0'
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(define-form-struct (splice form) ([forms (listof (or/c form? any/c))])) ; top-level `begin'
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(define-form-struct (varref expr) ([toplevel (or/c toplevel? #t)] [dummy (or/c toplevel? #f)])) ; `#%variable-reference'
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(define-form-struct (assign expr) ([id toplevel?] [rhs (or/c expr? seq? any/c)] [undef-ok? boolean?])) ; top-level or module-level set!
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(define-form-struct (apply-values expr) ([proc (or/c expr? seq? any/c)] [args-expr (or/c expr? seq? any/c)])) ; `(call-with-values (lambda () ,args-expr) ,proc)
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(define-form-struct (primval expr) ([id exact-nonnegative-integer?])) ; direct preference to a kernel primitive
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;; Top-level `require'
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(define-form-struct (req form) ([reqs stx?] [dummy toplevel?]))
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(define-form-struct free-id-info ([path0 module-path-index?]
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[symbol0 symbol?]
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[path1 module-path-index?]
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[symbol1 symbol?]
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[phase0 (or/c exact-integer? #f)]
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[phase1 (or/c exact-integer? #f)]
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[phase2 (or/c exact-integer? #f)]
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[use-current-inspector? boolean?]))
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(define-form-struct (lexical-rename wrap) ([has-free-id-renames? boolean?]
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[bool2 boolean?] ; this needs a name
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[alist (listof
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(cons/c symbol?
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(or/c
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symbol?
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(cons/c
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symbol?
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(or/c
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(cons/c symbol? (or/c symbol? #f))
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free-id-info?)))))]))
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(define-form-struct (phase-shift wrap) ([amt (or/c exact-integer? #f)] [src (or/c module-path-index? #f)] [dest (or/c module-path-index? #f)]))
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(define-form-struct (wrap-mark wrap) ([val exact-integer?]))
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(define-form-struct (prune wrap) ([sym any/c]))
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(define-form-struct all-from-module ([path module-path-index?]
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[phase (or/c exact-integer? #f)]
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[src-phase any/c] ; should be (or/c exact-integer? #f)
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[exceptions (or/c (listof (or/c symbol? number?)) #f)] ; should be (listof symbol?)
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[prefix (or/c (vector/c (or/c symbol? #f)) #f)])) ; should be (or/c symbol? #f)
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(define-form-struct nominal-path ())
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(define-form-struct (simple-nominal-path nominal-path) ([value module-path-index?]))
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(define-form-struct (imported-nominal-path nominal-path) ([value module-path-index?]
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[import-phase exact-integer?]))
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(define-form-struct (phased-nominal-path nominal-path) ([value module-path-index?]
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[import-phase (or/c false/c exact-integer?)]
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[phase exact-integer?]))
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(define-form-struct module-binding ())
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(define-form-struct (phased-module-binding module-binding) ([path module-path-index?]
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[phase exact-integer?]
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[export-name any/c]
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[nominal-path nominal-path?]
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[nominal-export-name any/c]))
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(define-form-struct (exported-nominal-module-binding module-binding) ([path module-path-index?]
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[export-name any/c]
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[nominal-path nominal-path?]
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[nominal-export-name any/c]))
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(define-form-struct (nominal-module-binding module-binding) ([path module-path-index?]
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[nominal-path nominal-path?]))
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(define-form-struct (exported-module-binding module-binding) ([path module-path-index?]
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[export-name any/c]))
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(define-form-struct (simple-module-binding module-binding) ([path module-path-index?]))
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(define-form-struct (module-rename wrap) ([phase (or/c exact-integer? #f)]
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[kind (or/c 'marked 'normal)]
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[set-id any/c]
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[unmarshals (listof all-from-module?)]
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[renames (listof (cons/c symbol? module-binding?))]
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[mark-renames any/c]
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[plus-kern? boolean?]))
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; XXX better name for 'flag'
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(define-form-struct (top-level-rename wrap) ([flag boolean?]))
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; XXX better name for 'value'
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(define-form-struct (mark-barrier wrap) ([value symbol?]))
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