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use IF as primitive, drop using cond/evcon only option.

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This commit is contained in:
Jan Nieuwenhuizen 2016-10-08 16:54:59 +02:00
parent 7c759e0670
commit 4514be76d9
9 changed files with 35 additions and 382 deletions
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41
GNUmakefile
View file

@ -2,15 +2,6 @@
CFLAGS:=-std=c99 -O3 -finline-functions
#CFLAGS:=-std=c99 -g
COND:=0
ifeq ($(COND),1)
CONDIF:=cond
else
CONDIF:=if
endif
CFLAGS+=-DCOND=$(COND)
default: all
all: mes
@ -48,11 +39,11 @@ check: all guile-check mes-check
mes-check: all
# ./mes.test
# ./mes.test ./mes
cat base0.mes base0-$(CONDIF).mes base.mes lib/test.mes test/base.test | ./mes
cat base0.mes base0-$(CONDIF).mes base.mes lib/test.mes test/closure.test | ./mes
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes lib/test.mes test/quasiquote.test | ./mes
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes lib/test.mes test/let.test | ./mes
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes lib/srfi/srfi-0.scm scm.mes lib/test.mes test/scm.test | ./mes
cat base0.mes base0-if.mes base.mes lib/test.mes test/base.test | ./mes
cat base0.mes base0-if.mes base.mes lib/test.mes test/closure.test | ./mes
cat base0.mes base0-if.mes base.mes quasiquote.mes lib/test.mes test/quasiquote.test | ./mes
cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes lib/test.mes test/let.test | ./mes
cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes lib/srfi/srfi-0.scm scm.mes lib/test.mes test/scm.test | ./mes
guile-check:
guile -s <(cat base.mes lib/test.mes test/base.test)
@ -73,31 +64,31 @@ run: all
cat scm.mes test.mes | ./mes
psyntax: all
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes psyntax.mes psyntax.pp psyntax2.mes | ./mes
cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes psyntax.mes psyntax.pp psyntax2.mes | ./mes
syntax: all
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes scm.mes syntax-cond.mes syntax-test.mes | ./mes
cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes scm.mes syntax.mes syntax-test.mes | ./mes
syntax.test: syntax-cond.mes syntax-test.mes
syntax.test: syntax.mes syntax-test.mes
cat $^ > $@
guile-syntax: syntax.test
guile -s $^
syntax-case: all
cat scm.mes syntax-cond.mes syntax-case-lib.mes syntax-case.mes syntax-case-after.mes syntax-case-test.mes | ./mes
cat scm.mes syntax.mes syntax-case-lib.mes syntax-case.mes syntax-case-after.mes syntax-case-test.mes | ./mes
syntax-case.test: syntax-cond.mes syntax-case-lib.mes syntax-case.mes syntax-case-after.mes syntax-case-test.mes
syntax-case.test: syntax.mes syntax-case-lib.mes syntax-case.mes syntax-case-after.mes syntax-case-test.mes
cat $^ > $@
guile-syntax-case: syntax-case.test
guile -s $^
macro: all
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes scm.mes macro.mes | ./mes
cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes scm.mes macro.mes | ./mes
peg: all
cat scm.mes syntax-cond.mes syntax-case-lib.mes syntax-case.mes syntax-case-after.mes peg.mes peg/codegen.scm peg/string-peg.scm peg/simplify-tree.scm peg/using-parsers.scm peg/cache.scm peg-test.mes | ./mes
cat scm.mes syntax.mes syntax-case-lib.mes syntax-case.mes syntax-case-after.mes peg.mes peg/codegen.scm peg/string-peg.scm peg/simplify-tree.scm peg/using-parsers.scm peg/cache.scm peg-test.mes | ./mes
peg.test: peg/pmatch.scm peg.mes peg/codegen.scm peg/string-peg.scm peg/simplify-tree.scm peg/using-parsers.scm peg/cache.scm peg-test.mes
cat $^ | sed 's,\(;; Packages the results of a parser\),(when (guile?) (set! compile-peg-pattern (@@ (ice-9 peg codegen) compile-peg-pattern)))\n\1,' > $@
@ -111,11 +102,11 @@ clean:
rm -f mes environment.i mes.h peg.test syntax.test
record: all
cat scm.mes syntax-cond.mes lib/record.mes lib/record.scm lib/srfi/srfi-9.scm record.mes |./mes
cat scm.mes syntax.mes lib/record.mes lib/record.scm lib/srfi/srfi-9.scm record.mes |./mes
paren: all
echo -e 'EOF\n___P((()))' | cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes scm.mes syntax-cond.mes lib/srfi/srfi-0.scm lib/record.mes lib/record.scm lib/srfi/srfi-9.scm lib/lalr.mes lib/lalr.scm paren.scm - | ./mes
echo -e 'EOF\n___P((()))' | cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes scm.mes syntax.mes lib/srfi/srfi-0.scm lib/record.mes lib/record.scm lib/srfi/srfi-9.scm lib/lalr.mes lib/lalr.scm paren.scm - | ./mes
paren.test: lib/lalr.scm paren.scm
cat $^ > $@
@ -124,7 +115,7 @@ guile-paren: paren.test
echo '___P((()))' | guile -s $^
mescc: all
echo ' EOF ' | cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes scm.mes syntax-cond.mes lib/srfi/srfi-0.scm lib/record.mes lib/record.scm lib/srfi/srfi-9.scm lib/lalr.mes lib/lalr.scm lib/rnrs/bytevectors.scm lib/srfi/srfi-1.scm lib/match.scm lib/elf.mes c-lexer.scm mescc.scm - main.c | ./mes > a.out
echo ' EOF ' | cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes scm.mes syntax.mes lib/srfi/srfi-0.scm lib/record.mes lib/record.scm lib/srfi/srfi-9.scm lib/lalr.mes lib/lalr.scm lib/rnrs/bytevectors.scm lib/srfi/srfi-1.scm lib/match.scm lib/elf.mes c-lexer.scm mescc.scm - main.c | ./mes > a.out
chmod +x a.out
mescc.test: lib/lalr.scm lib/rnrs/bytevectors.scm lib/srfi/srfi-1.scm lib/match.scm lib/elf.mes c-lexer.scm mescc.scm
@ -142,5 +133,5 @@ hello: hello.o
# ld -A i386 -m elf_i386 -A i386 -o $@ $^
a.out: lib/elf.mes elf.mes GNUmakefile
cat base0.mes base0-$(CONDIF).mes base.mes quasiquote.mes let.mes scm.mes lib/rnrs/bytevectors.scm lib/elf.mes elf.mes | ./mes > a.out
cat base0.mes base0-if.mes base.mes quasiquote.mes let.mes scm.mes lib/rnrs/bytevectors.scm lib/elf.mes elf.mes | ./mes > a.out
chmod +x a.out

40
base.mes
View file

@ -21,46 +21,6 @@
(define (identity x) x)
(define else #t)
;;; COND based
(define-macro (or . x)
(cond ;; COND
((null? x) #f)
((null? (cdr x)) (car x))
(#t (list 'cond (list (car x)) ;; COND
(list #t (cons 'or (cdr x)))))))
(define-macro (and . x)
(cond ((null? x) #t) ;; COND
((null? (cdr x)) (car x))
(#t (list 'cond (list (car x) (cons 'and (cdr x))) ;; COND
'(#t #f)))))
(define (not x)
(cond (x #f) ;; COND
(#t #t)))
(define (equal? a b) ;; FIXME: only 2 arg
(cond ((and (null? a) (null? b)) #t) ;; COND
((and (pair? a) (pair? b))
(and (equal? (car a) (car b))
(equal? (cdr a) (cdr b))))
((and (string? a) (string? b))
(eq? (string->symbol a) (string->symbol b)))
((and (vector? a) (vector? b))
(equal? (vector->list a) (vector->list b)))
(#t (eq? a b))))
(define (memq x lst)
(cond ((null? lst) #f) ;; COND
((eq? x (car lst)) lst)
(#t (memq x (cdr lst)))))
(define (map f l . r)
(cond ((null? l) '()) ;; COND
((null? r) (cons (f (car l)) (map f (cdr l))))
((null? (cdr r))
(cons (f (car l) (caar r)) (map f (cdr l) (cdar r))))))
;; IF based
(define-macro (or . x)
(if (null? x) #f ;; IF

31
base0-cond.mes
View file

@ -1,31 +0,0 @@
;;; -*-scheme-*-
;;; Mes --- Maxwell Equations of Software
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;;
;;; base.mes: This file is part of Mes.
;;;
;;; Mes is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; Mes is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with Mes. If not, see <http://www.gnu.org/licenses/>.
(define-macro (if expr then . else)
(list 'cond ;; COND
(list expr then)
(list #t (list 'cond (list (pair? else) ;; COND
(cons (cons 'lambda (cons '() (cons (cons 'begin (cons *unspecified* else)) '()))) '()))))))
(define (cons* x . rest)
(define (loop rest)
(cond ((null? (cdr rest)) (car rest)) ;; COND
(#t (cons (car rest) (loop (cdr rest))))))
(loop (cons x rest)))

2
base0-if.mes
View file

@ -24,7 +24,7 @@
(cons (car rest) (loop (cdr rest)))))
(loop (cons x rest)))
(define-macro cond
(define-macro xcond ;; using evcon: 50% speedup (cond in syntax.mes)
(lambda clauses
(if (null? clauses) *unspecified* ;; IF
(if (null? (cdr clauses)) ;; IF

39
let.mes
View file

@ -28,10 +28,9 @@
(,label ,@(map cadr bindings))))
(define-macro (let bindings-or-label . rest)
`(`,(cond (,(symbol? bindings-or-label)
(list 'lambda '() (cons* 'named-let ,bindings-or-label ,(car rest) ,(cdr rest))))
(#t
(list 'lambda '() (cons* 'simple-let ,bindings-or-label ,rest))))))
`(`,(if ,(symbol? bindings-or-label)
(list 'lambda '() (cons* 'named-let ,bindings-or-label ,(car rest) ,(cdr rest)))
(list 'lambda '() (cons* 'simple-let ,bindings-or-label ,rest)))))
(define-macro (xsimple-let bindings rest)
`(,`(lambda ,(map car bindings) ,@rest)
@ -42,12 +41,6 @@
(set! ,label (lambda ,(map car bindings) ,@rest))
(,label ,@(map cadr bindings))))
;; COND
(define-macro (let bindings-or-label . rest)
`(cond (,(symbol? bindings-or-label) ;; COND
(xnamed-let ,bindings-or-label ,(car rest) ,(cdr rest)))
(#t (xsimple-let ,bindings-or-label ,rest))))
;; IF
(define-macro (let bindings-or-label . rest)
`(if ,(symbol? bindings-or-label) ;; IF
@ -55,26 +48,26 @@
(xsimple-let ,bindings-or-label ,rest)))
(define (expand-let* bindings body)
(cond ((null? bindings)
`((lambda () ,@body)))
(#t `((lambda (,(caar bindings))
,(expand-let* (cdr bindings) body))
,@(cdar bindings)))))
(if (null? bindings)
`((lambda () ,@body))
`((lambda (,(caar bindings))
,(expand-let* (cdr bindings) body))
,@(cdar bindings))))
(define-macro (let* bindings . body)
(expand-let* bindings body))
(define (unspecified-bindings bindings params)
(cond ((null? bindings) params)
(#t (unspecified-bindings
(cdr bindings)
(append params (cons (cons (caar bindings) '(*unspecified*)) '()))))))
(if (null? bindings) params
(unspecified-bindings
(cdr bindings)
(append params (cons (cons (caar bindings) '(*unspecified*)) '())))))
(define (letrec-setters bindings setters)
(cond ((null? bindings) setters)
(#t (letrec-setters (cdr bindings)
(append setters
(cons (cons 'set! (car bindings)) '()))))))
(if (null? bindings) setters
(letrec-setters (cdr bindings)
(append setters
(cons (cons 'set! (car bindings)) '())))))
(define-macro (letrec bindings . body)
`(let ,(unspecified-bindings bindings '())

5
mes.c
View file

@ -375,13 +375,12 @@ eval (scm *e, scm *a)
return eval (apply_env (cdr (macro), e, a), a);
if ((macro = lookup_macro (car (e), a)) != &scm_f)
return eval (apply_env (macro, cdr (e), a), a);
#if COND
#if 1 //COND
if (car (e) == &symbol_cond)
return evcon (cdr (e), a);
#else
#endif
if (car (e) == &symbol_if)
return if_env (cdr (e), a);
#endif
if (eq_p (car (e), &symbol_define) == &scm_t)
return define (e, a);
if (eq_p (car (e), &symbol_define_macro) == &scm_t)

21
scm.mes
View file

@ -84,11 +84,6 @@
(define assv assq)
(define assv-ref assq-ref)
(define (assoc key alist)
(cond ((null? alist) #f) ;; COND
((equal? key (caar alist)) (car alist))
(#t (assoc key (cdr alist)))))
(define (assoc key alist)
(if (null? alist) #f ;; IF
(if (equal? key (caar alist)) (car alist)
@ -99,33 +94,17 @@
(if entry (cdr entry)
#f)))
(define (memq x lst)
(cond ((null? lst) #f) ;; COND
((eq? x (car lst)) lst)
(#t (memq x (cdr lst)))))
(define (memq x lst)
(if (null? lst) #f ;; IF
(if (eq? x (car lst)) lst
(memq x (cdr lst)))))
(define memv memq)
(define (member x lst)
(cond ((null? lst) #f) ;; COND
((equal? x (car lst)) lst)
(#t (member x (cdr lst)))))
(define (member x lst)
(if (null? lst) #f ;; IF
(if (equal? x (car lst)) lst
(member x (cdr lst)))))
(define (for-each f l . r)
(cond ((null? l) '()) ;; COND
((null? r) (f (car l)) (for-each f (cdr l)))
((null? (cdr r))
(for-each f (cdr l) (cdar r)))))
(define (for-each f l . r)
(if (null? l) '() ;; IF
(if (null? r) (begin (f (car l)) (for-each f (cdr l)))

238
syntax-if.mes
View file

@ -1,238 +0,0 @@
;; -*-scheme-*-
(define (syntax-error message thing)
(display "syntax-error:")
(display message)
(display ":")
(display thing)
(newline))
;;; Adapted from scheme48-1.1/scheme/alt/syntax.scm
;;; Copyright (c) 1993-2004 by Richard Kelsey and Jonathan Rees. See file COPYING.
;;; scheme48-1.1/COPYING
;; Copyright (c) 1993-2004 Richard Kelsey and Jonathan Rees
;; All rights reserved.
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions
;; are met:
;; 1. Redistributions of source code must retain the above copyright
;; notice, this list of conditions and the following disclaimer.
;; 2. Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; 3. The name of the authors may not be used to endorse or promote products
;; derived from this software without specific prior written permission.
;; THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
;; IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
;; OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
;; IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
;; INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
;; NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
;; DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
;; THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
;; (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
;; THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
(define-macro (define-syntax macro-name transformer . stuff)
`(define-macro (,macro-name . args)
(,transformer (cons ',macro-name args)
(lambda (x) x)
eq?)))
;; Rewrite-rule compiler (a.k.a. "extend-syntax")
;; Example:
;;
;; (define-syntax or
;; (syntax-rules ()
;; ((or) #f)
;; ((or e) e)
;; ((or e1 e ...) (let ((temp e1))
;; (if temp temp (or e ...))))))
(define-syntax syntax-rules
(let ()
(define name? symbol?)
(define (segment-pattern? pattern)
(and (segment-template? pattern)
(or (null? (cddr pattern))
(syntax-error "segment matching not implemented" pattern))))
(define (segment-template? pattern)
(and (pair? pattern)
(pair? (cdr pattern))
(memq (cadr pattern) indicators-for-zero-or-more)))
(define indicators-for-zero-or-more (list (string->symbol "...") '---))
(lambda (exp r c)
(define %input (r '%input)) ;Gensym these, if you like.
(define %compare (r '%compare))
(define %rename (r '%rename))
(define %tail (r '%tail))
(define %temp (r '%temp))
(define rules (cddr exp))
(define subkeywords (cadr exp))
(define (make-transformer rules)
`(lambda (,%input ,%rename ,%compare)
(let ((,%tail (cdr ,%input)))
(cond ,@(map process-rule rules)
(else
(syntax-error
"use of macro doesn't match definition"
,%input))))))
(define (process-rule rule)
(if (and (pair? rule)
(pair? (cdr rule))
(null? (cddr rule)))
(let ((pattern (cdar rule))
(template (cadr rule)))
`((and ,@(process-match %tail pattern))
(let* ,(process-pattern pattern
%tail
(lambda (x) x))
,(process-template template
0
(meta-variables pattern 0 '())))))
(syntax-error "ill-formed syntax rule" rule)))
;; Generate code to test whether input expression matches pattern
(define (process-match input pattern)
(cond ((name? pattern)
(if (member pattern subkeywords)
`((,%compare ,input (,%rename ',pattern)))
`()))
((segment-pattern? pattern)
(process-segment-match input (car pattern)))
((pair? pattern)
`((let ((,%temp ,input))
(and (pair? ,%temp)
,@(process-match `(car ,%temp) (car pattern))
,@(process-match `(cdr ,%temp) (cdr pattern))))))
((or (null? pattern) (boolean? pattern) (char? pattern))
`((eq? ,input ',pattern)))
(else
`((equal? ,input ',pattern)))))
(define (process-segment-match input pattern)
(let ((conjuncts (process-match '(car l) pattern)))
(if (null? conjuncts)
`((list? ,input)) ;+++
`((let loop ((l ,input))
(or (null? l)
(and (pair? l)
,@conjuncts
(loop (cdr l)))))))))
;; Generate code to take apart the input expression
;; This is pretty bad, but it seems to work (can't say why).
(define (process-pattern pattern path mapit)
(cond ((name? pattern)
(if (memq pattern subkeywords)
'()
(list (list pattern (mapit path)))))
((segment-pattern? pattern)
(process-pattern (car pattern)
%temp
(lambda (x) ;temp is free in x
(mapit (if (eq? %temp x)
path ;+++
`(map (lambda (,%temp) ,x)
,path))))))
((pair? pattern)
(append (process-pattern (car pattern) `(car ,path) mapit)
(process-pattern (cdr pattern) `(cdr ,path) mapit)))
(else '())))
;; Generate code to compose the output expression according to template
(define (process-template template rank env)
(cond ((name? template)
(let ((probe (assq template env)))
(if probe
(if (<= (cdr probe) rank)
template
(syntax-error "template rank error (too few ...'s?)"
template))
`(,%rename ',template))))
((segment-template? template)
(let ((vars
(free-meta-variables (car template) (+ rank 1) env '())))
(if (null? vars)
(syntax-error "too many ...'s" template)
(let* ((x (process-template (car template)
(+ rank 1)
env))
(gen (if (equal? (list x) vars)
x ;+++
`(map (lambda ,vars ,x)
,@vars))))
(if (null? (cddr template))
gen ;+++
`(append ,gen ,(process-template (cddr template)
rank env)))))))
((pair? template)
`(cons ,(process-template (car template) rank env)
,(process-template (cdr template) rank env)))
(else `(quote ,template))))
;; Return an association list of (var . rank)
(define (meta-variables pattern rank vars)
(cond ((name? pattern)
(if (memq pattern subkeywords)
vars
(cons (cons pattern rank) vars)))
((segment-pattern? pattern)
(meta-variables (car pattern) (+ rank 1) vars))
((pair? pattern)
(meta-variables (car pattern) rank
(meta-variables (cdr pattern) rank vars)))
(else vars)))
;; Return a list of meta-variables of given higher rank
(define (free-meta-variables template rank env free)
(cond ((name? template)
(if (and (not (memq template free))
(let ((probe (assq template env)))
(and probe (>= (cdr probe) rank))))
(cons template free)
free))
((segment-template? template)
(free-meta-variables (car template)
rank env
(free-meta-variables (cddr template)
rank env free)))
((pair? template)
(free-meta-variables (car template)
rank env
(free-meta-variables (cdr template)
rank env free)))
(else free)))
c ;ignored
;; Kludge for Scheme48 linker.
;; `(cons ,(make-transformer rules)
;; ',(find-free-names-in-syntax-rules subkeywords rules))
(make-transformer rules))))
(define-macro (define-syntax-rule id-pattern . template)
`(define-syntax ,(car id-pattern)
(syntax-rules ()
((,(car id-pattern) . ,(cdr id-pattern)) ,@template))))

0
syntax-cond.mes → syntax.mes
View file