
;; A sane "core" for finishing up the "scheme/base" library

(module pre-base '#%kernel
  (#%require (for-syntax '#%kernel))
  (#%require "more-scheme.rkt"
             "misc.rkt"
             (all-except "define.rkt" define define-syntax define-for-syntax)
             "letstx-scheme.rkt"
             "kw.rkt"
             "define-struct.rkt"
             "reqprov.rkt"
             "modbeg.rkt"
             "for.rkt"
             "map.rkt" ; shadows #%kernel bindings
             "kernstruct.rkt"
             "norm-arity.rkt"
             '#%builtin  ; so it's attached
             (for-syntax "kw.rkt"
                         "norm-define.rkt"))

  (define-syntaxes (#%top-interaction)
    (lambda (stx)
      (if (eq? 'top-level (syntax-local-context))
          'ok
          (raise-syntax-error
           #f
           "not at top level"
           stx))
      (if (symbol? (syntax-e stx))
          (raise-syntax-error #f "bad syntax" stx)
          (datum->syntax stx (cdr (syntax-e stx)) stx stx))))

  (define-values (new-apply-proc)
    (make-keyword-procedure
     (lambda (kws kw-args proc args . rest)
       (keyword-apply proc kws kw-args (apply list* args rest)))
     apply))

  (define-syntaxes (new-apply)
    ;; Convert (apply ...) without keyword args to primitive `apply',
    ;;  so that oher optimizations are available.
    (lambda (stx)
      (let-values ([(here) (quote-syntax here)])
        (if (symbol? (syntax-e stx))
            (datum->syntax here 'new-apply-proc stx stx)
            (let-values ([(l) (syntax->list stx)])
              (let-values ([(app) (if (if l
                                          (ormap (lambda (x) (keyword? (syntax-e x))) l)
                                          #t)
                                      'new-apply-proc
                                      'apply)])
                (datum->syntax
                 stx
                 (cons (datum->syntax here app (car l) (car l))
                       (cdr (syntax-e stx)))
                 stx
                 stx)))))))

  (define-values (new-keyword-apply)
    (make-keyword-procedure
     (lambda (kws kw-args proc orig-kws orig-kw-args args . rest)
       (let-values ([(kws kw-args)
                     (let loop ([kws kws] [kw-args kw-args]
                                [kws2 orig-kws] [kw-args2 orig-kw-args]
                                [swapped? #f])
                       (cond
                        [(null? kws) (values kws2 kw-args2)]
                        [(null? kws2) (values kws kw-args)]
                        [(keyword<? (car kws) (car kws2))
                         (let-values ([(res-kws res-kw-args)
                                       (loop (cdr kws) (cdr kw-args) kws2 kw-args2 #f)])
                           (values (cons (car kws) res-kws)
                                   (cons (car kw-args) res-kw-args)))]
                        [swapped?
                         (raise-mismatch-error
                          'keyword-apply
                          "keyword duplicated in list and direct keyword arguments: "
                          (car kws))]
                        [else (loop kws2 kw-args2 kws kw-args #t)]))])
         (keyword-apply proc kws kw-args (apply list* args rest))))
     keyword-apply))

  (define-syntaxes (new-define-syntax)
    (lambda (stx)
      (let-values ([(id rhs)
                    (normalize-definition stx (quote-syntax new-lambda) #t #t)]
                   [(def) (quote-syntax define-syntaxes)])
        (datum->syntax
         def
         (list def (list id) rhs)
         stx
         stx))))

  (define-syntaxes (new-define-for-syntax)
    (lambda (stx)
      (let-values ([(id rhs)
                    (normalize-definition stx (quote-syntax new-lambda) #t #t)]
                   [(def) (quote-syntax define-values-for-syntax)])
        (datum->syntax
         def
         (list def (list id) rhs)
         stx
         stx))))

  (define-values (double-flonum?) ; for symmetry with single-flonum?
    (lambda (x) (flonum? x)))

  (#%provide (all-from-except "more-scheme.rkt" old-case fluid-let)
             (all-from "misc.rkt")
             (all-from "define.rkt")
             (all-from-except "letstx-scheme.rkt" -define -define-syntax -define-struct old-cond)
             (rename new-lambda lambda)
             (rename new-λ λ)
             (rename new-define define)
             (rename new-define-syntax define-syntax)
             (rename new-define-for-syntax define-for-syntax)
             (rename new-app #%app)
             (rename new-apply apply)
             new-apply-proc ; for access by Typed Racket
             (rename new-prop:procedure prop:procedure)
             (rename #%app #%plain-app)
             (rename lambda #%plain-lambda)
             (rename #%module-begin #%plain-module-begin)
             (rename module-begin #%module-begin)
             (rename norm:procedure-arity procedure-arity)
             (rename norm:raise-arity-error raise-arity-error)
             (rename new:procedure-reduce-arity procedure-reduce-arity)
             (rename new:procedure->method procedure->method)
             (rename new:procedure-rename procedure-rename)
             (rename new:chaperone-procedure chaperone-procedure)
             (rename new:impersonate-procedure impersonate-procedure)
             (all-from-except '#%kernel lambda λ #%app #%module-begin apply prop:procedure 
                              procedure-arity procedure-reduce-arity raise-arity-error
                              procedure->method procedure-rename
                              chaperone-procedure impersonate-procedure)
             (all-from "reqprov.rkt")
             (all-from-except "for.rkt"
                              define-in-vector-like
                              define-:vector-like-gen
                              make-in-vector-like
                              normalise-inputs
                              stream? stream-empty? stream-first stream-rest 
                              prop:stream in-stream empty-stream make-do-stream)
             (all-from "kernstruct.rkt")
             #%top-interaction

             map for-each andmap ormap
             make-keyword-procedure
             (rename new-keyword-apply keyword-apply)
             procedure-keywords
             procedure-reduce-keyword-arity
             (rename define-struct* define-struct)
             define-struct/derived
             struct-field-index
             struct-copy
             double-flonum?))
