Leave pure LISP.
* GNUmakefile: New file. * mes.c: Lots of work. * mes.mes: New file, split-off from mes.scm. (builtin, number): New function. (apply): Use them. * mes.test: New file. * scm.mes: New file, split-off from mes.scm.
This commit is contained in:
Jan Nieuwenhuizen
parent
22ba3f6869
commit
1a565a9208
13
GNUmakefile
Normal file
13
GNUmakefile
Normal file
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@ -0,0 +1,13 @@
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.PHONY: all check default
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CFLAGS=-std=c99 -O3 -finline-functions
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#CFLAGS=-g
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default: all
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all: mes
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check: all
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./mes.test
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./mes.test ./mes
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./mes < scm.mes
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./mes.scm < scm.mes
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587
mes.c
587
mes.c
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@ -34,12 +34,13 @@
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#include <stdlib.h>
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#include <stdbool.h>
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#define DEBUG 0
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#ifndef QUOTE_SUGAR
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#define QUOTE_SUGAR 1
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#endif
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enum type {NIL, F, T, ATOM, NUMBER, PAIR, UNSPECIFIED, FUNCTION0, FUNCTION1, FUNCTION2, FUNCTION3, LAMBDA, LABEL};
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enum type {ATOM, NUMBER, PAIR, FUNCTION0, FUNCTION1, FUNCTION2, FUNCTION3};
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struct scm_t;
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typedef struct scm_t* (*function0_t) (void);
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typedef struct scm_t* (*function1_t) (struct scm_t*);
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@ -62,14 +63,24 @@ typedef struct scm_t {
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};
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} scm;
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scm scm_nil = {NIL, "()"};
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scm scm_t = {T, "#t"};
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scm scm_f = {F, "#f"};
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scm scm_lambda = {LAMBDA, "lambda"};
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scm scm_label = {LABEL, "label"};
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scm scm_unspecified = {UNSPECIFIED, "#<unspecified>"};
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scm scm_nil = {ATOM, "()"};
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scm scm_t = {ATOM, "#t"};
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scm scm_f = {ATOM, "#f"};
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scm scm_lambda = {ATOM, "lambda"};
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scm scm_label = {ATOM, "label"};
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scm scm_unspecified = {ATOM, "*unspecified*"};
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scm scm_define = {ATOM, "define"};
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scm scm_macro = {ATOM, "*macro*"};
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// PRIMITIVES
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scm *
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atom (scm *x)
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{
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return x->type == PAIR ? &scm_f : &scm_t;
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}
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scm scm_atom = {FUNCTION1, .name="atom", .function1 = &atom};
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scm *
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car (scm *x)
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{
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@ -98,11 +109,14 @@ scm *
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eq_p (scm *x, scm *y)
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{
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return (x == y
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// FIXME: alist lookup symbols
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|| (x->type == ATOM && y->type == ATOM
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&& !strcmp (x->name, y->name))
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|| (x->type == NUMBER && y->type == NUMBER
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&& x->value == y->value))
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&& x->value == y->value)
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// FIXME: alist lookup symbols
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|| (atom (x) == &scm_t
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&& x->type != NUMBER
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&& y->type != NUMBER
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&& atom (y) == &scm_t
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&& !strcmp (x->name, y->name)))
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? &scm_t : &scm_f;
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}
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@ -120,21 +134,7 @@ pair_p (scm *x)
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scm *eval (scm*, scm*);
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scm *
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cond (scm *x, scm *a)
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{
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if (x == &scm_nil) return &scm_unspecified;
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assert (x->type == PAIR);
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scm *clause = car (x);
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assert (clause->type == PAIR);
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scm *expr = eval (car (clause), a);
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if (expr != &scm_f) {
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if (clause->type != PAIR)
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return expr;
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return eval (car (cdr (clause)), a);
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}
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return cond (cdr (x), a);
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}
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scm *display (scm*);
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scm scm_quote;
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scm *
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@ -143,26 +143,64 @@ quote (scm *x)
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return cons (&scm_quote, x);
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}
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//PRIMITIVES
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scm scm_car = {FUNCTION1, .function1 = &car};
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scm scm_cdr = {FUNCTION1, .function1 = &cdr};
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scm scm_cons = {FUNCTION2, .function2 = &cons};
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scm scm_cond = {FUNCTION2, .function2 = &cond};
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scm scm_eq_p = {FUNCTION2, .function2 = &eq_p};
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scm scm_null_p = {FUNCTION1, .function1 = &null_p};
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scm scm_pair_p = {FUNCTION1, .function1 = &pair_p};
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scm scm_quote = {FUNCTION1, .function1 = "e};
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#if QUASIQUOTE
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scm scm_unquote;
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scm *
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unquote (scm *x)
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{
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return cons (&scm_unquote, x);
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}
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//LIBRARY FUNCTIONS
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scm scm_quasiquote;
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scm *
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quasiquote (scm *x)
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{
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return cons (&scm_quasiquote, x);
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}
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scm *eval_quasiquote (scm *, scm *);
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#endif
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//Primitives
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scm scm_car = {FUNCTION1, "car", .function1 = &car};
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scm scm_cdr = {FUNCTION1, "cdr", .function1 = &cdr};
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scm scm_cons = {FUNCTION2, "cons", .function2 = &cons};
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scm scm_cond = {FUNCTION2, "cond"}; //, .function2 = &cond};
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scm scm_eq_p = {FUNCTION2, "eq", .function2 = &eq_p};
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scm scm_null_p = {FUNCTION1, "null", .function1 = &null_p};
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scm scm_pair_p = {FUNCTION1, "pair", .function1 = &pair_p};
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scm scm_quote = {FUNCTION1, "quote", .function1 = "e};
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#if QUASIQUOTE
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scm scm_unquote = {FUNCTION1, "unquote", .function1 = &unquote};
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scm scm_quasiquote = {FUNCTION1, "quasiquote", .function1 = &quasiquote};
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#endif
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//Library functions
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scm scm_read;
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// NEXT
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scm *caar (scm *x) {return (car (car (x)));}
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scm *cadr (scm *x) {return (car (cdr (x)));}
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scm *cdar (scm *x) {return (cdr (car (x)));}
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// Derived, non-primitives
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scm *caar (scm *x) {return car (car (x));}
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scm *cadr (scm *x) {return car (cdr (x));}
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scm *cdar (scm *x) {return cdr (car (x));}
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scm *cddr (scm *x) {return cdr (cdr (x));}
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scm *caadr (scm *x) {return car (car (cdr (x)));}
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scm *caddr (scm *x) {return car (cdr (cdr (x)));}
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scm *cdadr (scm *x) {return cdr (car (cdr (x)));}
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scm *cadar (scm *x) {return car (cdr (car (x)));}
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scm *cddar (scm *x) {return cdr (cdr (car (x)));}
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scm *cdddr (scm *x) {return cdr (cdr (cdr (x)));}
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scm scm_caar = {FUNCTION1, .name="caar ", .function1 = &caar };
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scm scm_cadr = {FUNCTION1, .name="cadr ", .function1 = &cadr };
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scm scm_cdar = {FUNCTION1, .name="cdar ", .function1 = &cdar };
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scm scm_cddr = {FUNCTION1, .name="cddr ", .function1 = &cddr };
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scm scm_caadr = {FUNCTION1, .name="caadr", .function1 = &caadr};
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scm scm_caddr = {FUNCTION1, .name="caddr", .function1 = &caddr};
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scm scm_cdadr = {FUNCTION1, .name="cdadr", .function1 = &cdadr};
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scm scm_cadar = {FUNCTION1, .name="cadar", .function1 = &cadar};
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scm scm_cddar = {FUNCTION1, .name="cddar", .function1 = &cddar};
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scm scm_cdddr = {FUNCTION1, .name="cdddr", .function1 = &cdddr};
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scm *
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list (scm *x, ...)
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@ -180,63 +218,34 @@ list (scm *x, ...)
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return lst;
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}
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scm *
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atom (scm *x)
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{
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#if EVAL_COND
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return cond
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(list (cons (pair_p (x), &scm_f),
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cons (null_p (x), &scm_f),
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cons (&scm_t, x),
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&scm_unspecified),
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&scm_nil);
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#else
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if (pair_p (x) == &scm_t)
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return &scm_f;
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else if (null_p (x) == &scm_t)
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return &scm_f;
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return &scm_t;
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#endif
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}
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// Page 12
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scm *
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pairlis (scm *x, scm *y, scm *a)
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{
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#if EVAL_COND
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return cond
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(list (cons (null_p (x), a),
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cons (&scm_t, cons (cons (car (x), car (y)),
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pairlis (cdr (x), cdr (y), a))),
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&scm_unspecified),
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a);
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#else
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if (x == &scm_nil)
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return a;
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return cons (cons (car (x), car (y)),
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pairlis (cdr (x), cdr (y), a));
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#endif
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}
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scm scm_pairlis = {FUNCTION3, .name="pairlis", .function3 = &pairlis};
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scm *
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assoc (scm *x, scm *a)
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{
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#if EVAL_COND
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return cond
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(list (cons (eq_p (caar (a), x), car (a)),
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cons (&scm_t, assoc (x, cdr (a))),
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&scm_unspecified),
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a);
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#else
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//printf ("assoc: %s\n" , x->name);
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// not Page 12:
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if (a == &scm_nil) return &scm_f;
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if (a == &scm_nil) {
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#if DEBUG
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printf ("alist miss: %s\n", x->name);
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#endif
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return &scm_f;
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}
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//
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if (eq_p (caar (a), x) == &scm_t)
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return car (a);
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return assoc (x, cdr (a));
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#endif
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}
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scm scm_assoc = {FUNCTION2, .name="assoc", .function2 = &assoc};
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// Page 13
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scm *apply (scm*, scm*, scm*);
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@ -247,25 +256,16 @@ eval_quote (scm *fn, scm *x)
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return apply (fn, x, &scm_nil);
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}
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scm *procedure_p (scm*);
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scm *builtin_p (scm*);
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scm *call (scm *, scm*);
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scm *display (scm*);
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scm *newline ();
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// .. continued Page 13
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scm *
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apply (scm *fn, scm *x, scm *a)
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{
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#if EVAL_COND
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return cond
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(list (cons (atom (fn),
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cond (list (
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&scm_unspecified),
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a)),
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cons (eq_p (car (fn), &scm_lambda),
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eval (caddr (fn), pairlis (cadr (fn), x, a))),
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&scm_unspecified), a);
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#else
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#if 0
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#if DEBUG
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printf ("apply fn=");
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display (fn);
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printf (" x=");
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@ -274,29 +274,25 @@ apply (scm *fn, scm *x, scm *a)
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#endif
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if (atom (fn) != &scm_f)
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{
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if (fn == &scm_car)
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return caar (x);
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else if (fn == &scm_cdr)
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return cdar (x);
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else if (fn == &scm_cdr)
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return cdar (x);
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else if (fn == &scm_cons)
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return cons (car (x), cadr (x));
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else if (fn == &scm_eq_p)
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return eq_p (car (x), cadr (x));
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else if (procedure_p (fn) != &scm_f)
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if (builtin_p (fn) == &scm_t)
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return call (fn, x);
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else
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return apply (eval (fn, a), x, a);
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}
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else if (car (fn) == &scm_lambda)
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return eval (caddr (fn), pairlis (cadr (fn), x, a));
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// Page 12: single statement lambda
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// else if (car (fn) == &scm_lambda)
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// return eval (caddr (fn), pairlis (cadr (fn), x, a));
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// Multi-statement lambda
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else if (car (fn) == &scm_lambda) {
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scm *body = cddr (fn);
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scm *ax = pairlis (cadr (fn), x, a);
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scm *result = eval (car (body), ax);
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if (cdr (body) == &scm_nil)
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return result;
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return apply (cons (car (fn), cons (cadr (fn), cdddr (fn))), x, ax);
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}
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else if (car (fn) == &scm_label)
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return apply (caddr (fn), x, cons (cons (cadr (fn),
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caddr (fn)),
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a));
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return apply (caddr (fn), x, cons (cons (cadr (fn), caddr (fn)), a));
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return &scm_unspecified;
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#endif
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}
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scm *evcon (scm*, scm*);
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@ -305,37 +301,98 @@ scm *evlis (scm*, scm*);
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scm *
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eval (scm *e, scm *a)
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{
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#if EVAL_COND
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#error no eval cond here
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#else
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#if DEBUG
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printf ("eval e=");
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display (e);
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// printf (" a=");
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// display (a);
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puts ("");
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#endif
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// not Page 12
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if (e->type == NUMBER
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|| e == &scm_t
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|| e== &scm_f)
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if (e->type == NUMBER)
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return e;
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//
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else if (atom (e) == &scm_t) {
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scm *y = assoc (e, a);
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if (y == &scm_f) {
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printf ("eval: no such symbol: %s\n", e->name);
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exit (1);
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}
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return cdr (y);
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}
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// not Page 12
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if (builtin_p (e) == &scm_t)
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return e;
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//
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else if (atom (e) == &scm_t)
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return cdr (assoc (e, a));
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else if (atom (car (e)) == &scm_t)
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{
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scm *macro;
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#if DEBUG
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printf ("e:");
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display (e);
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puts ("");
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scm *macros = cdr (assoc (&scm_macro, a));
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if (pair_p (macros) == &scm_t) {
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printf ("macros:");
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display (macros);
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puts ("");
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}
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#endif
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if (car (e) == &scm_quote)
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return cadr (e);
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#if QUASIQUOTE
|
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else if (car (e) == &scm_unquote)
|
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return eval (cadr (e), a);
|
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else if (car (e) == &scm_quasiquote) {
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#if DEBUG
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printf ("cadr e:");
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display (cadr (e));
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puts ("");
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printf ("qq:");
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display (eval_quasiquote (cadr (e), a));
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puts ("");
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#endif
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return eval_quasiquote (cadr (e), a);
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}
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#endif
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else if (car (e) == &scm_cond)
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return evcon (cdr (e), a);
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//return cond (cdr (e), a);
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else if ((macro = assoc (car (e), cdr (assoc (&scm_macro, a)))) != &scm_f) {
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#if DEBUG
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printf ("eval macro:");
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display (cdr (macro));
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puts ("");
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printf ("macro evlis:");
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display (evlis (cdr (e), a));
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puts ("");
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#endif
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return eval (apply
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(cdr (macro),
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evlis (cdr (e), a),
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a),
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a);
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}
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else
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return apply (car (e), evlis (cdr (e), a), a);
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}
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return apply (car (e), evlis (cdr (e), a), a);
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#endif
|
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}
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scm *
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evcon (scm *c, scm *a)
|
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{
|
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if (eval (caar (c), a) != &scm_f)
|
||||
// if (eval (caar (c), a) != &scm_f)
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// return eval (cadar (c), a);
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if (eval (caar (c), a) != &scm_f) {
|
||||
if (cddar (c) == &scm_nil)
|
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return eval (cadar (c), a);
|
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eval (cadar (c), a);
|
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return evcon (cons (cons (&scm_t, cddar (c)), &scm_nil), a);
|
||||
}
|
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return evcon (cdr (c), a);
|
||||
}
|
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scm scm_evcon = {FUNCTION2, .name="evcon", .function2 = &evcon};
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|
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scm *
|
||||
evlis (scm *m, scm *a)
|
||||
|
|
@ -344,13 +401,12 @@ evlis (scm *m, scm *a)
|
|||
return &scm_nil;
|
||||
return cons (eval (car (m), a), evlis (cdr (m), a));
|
||||
}
|
||||
scm scm_evlis = {FUNCTION2, .name="evlis", .function2 = &evlis};
|
||||
|
||||
// EXTRAS
|
||||
scm scm_eval = {FUNCTION2, .function2 = &eval};
|
||||
scm scm_apply = {FUNCTION3, .function3 = &apply};
|
||||
|
||||
scm *
|
||||
procedure_p (scm *x)
|
||||
builtin_p (scm *x)
|
||||
{
|
||||
return (x->type == FUNCTION0
|
||||
|| x->type == FUNCTION1
|
||||
|
|
@ -358,6 +414,15 @@ procedure_p (scm *x)
|
|||
|| x->type == FUNCTION3)
|
||||
? &scm_t : &scm_f;
|
||||
}
|
||||
scm scm_builtin_p = {FUNCTION1, .name="builtin", .function1 = &builtin_p};
|
||||
|
||||
scm *
|
||||
number_p (scm *x)
|
||||
{
|
||||
return x->type == NUMBER ? &scm_t : &scm_f;
|
||||
}
|
||||
scm scm_number_p = {FUNCTION1, .name="number", .function1 = &number_p};
|
||||
|
||||
|
||||
scm *
|
||||
call (scm *fn, scm *x)
|
||||
|
|
@ -372,6 +437,7 @@ call (scm *fn, scm *x)
|
|||
return fn->function3 (car (x), cadr (x), caddr (x));
|
||||
return &scm_unspecified;
|
||||
}
|
||||
scm scm_call = {FUNCTION1, .name="call", .function2 = &call};
|
||||
|
||||
scm *
|
||||
append (scm *x, scm *y)
|
||||
|
|
@ -380,6 +446,8 @@ append (scm *x, scm *y)
|
|||
assert (x->type == PAIR);
|
||||
return cons (car (x), append (cdr (x), y));
|
||||
}
|
||||
scm scm_append = {FUNCTION2, .name="append", .function2 = &append};
|
||||
|
||||
|
||||
scm *
|
||||
make_atom (char const *s)
|
||||
|
|
@ -400,32 +468,27 @@ make_number (int x)
|
|||
return p;
|
||||
}
|
||||
|
||||
scm *environment = &scm_nil;
|
||||
|
||||
scm *
|
||||
lookup (char *x)
|
||||
lookup (char *x, scm *a)
|
||||
{
|
||||
if (!strcmp (x, " ()")) return &scm_nil;
|
||||
if (!strcmp (x, "#t")) return &scm_t;
|
||||
if (!strcmp (x, "#f")) return &scm_f;
|
||||
if (!strcmp (x, "'")) return &scm_quote; // assert !quote?
|
||||
if (isdigit (*x) || (*x == '-' && isdigit (*(x+1))))
|
||||
return make_number (atoi (x));
|
||||
|
||||
// TODO: alist lookup symbols
|
||||
if (!strcmp (x, "label")) return &scm_label;
|
||||
if (!strcmp (x, "lambda")) return &scm_lambda;
|
||||
|
||||
if (!strcmp (x, "car")) return &scm_car;
|
||||
if (!strcmp (x, "cdr")) return &scm_cdr;
|
||||
if (!strcmp (x, "cons")) return &scm_cons;
|
||||
if (!strcmp (x, "eq")) return &scm_eq_p;
|
||||
if (!strcmp (x, "quote")) return &scm_quote;
|
||||
if (!strcmp (x, "cond")) return &scm_cond;
|
||||
|
||||
if (x) {
|
||||
scm *y = make_atom (x);
|
||||
scm *r = assoc (y, environment);
|
||||
scm *r = assoc (y, a);
|
||||
#if 0
|
||||
if (!strcmp (x, "eval")) {
|
||||
printf ("lookup %s ==> ", x);
|
||||
display (r);
|
||||
puts ("");
|
||||
}
|
||||
|
||||
if (!strcmp (x, "apply")) {
|
||||
printf ("lookup %s ==> ", x);
|
||||
display (r);
|
||||
puts ("");
|
||||
}
|
||||
#endif
|
||||
if (r != &scm_f) return cdr (r);
|
||||
return y;
|
||||
}
|
||||
|
|
@ -442,59 +505,57 @@ cossa (scm *x, scm *a)
|
|||
return cossa (x, cdr (a));
|
||||
}
|
||||
|
||||
scm *display_helper (scm*, bool, char*);
|
||||
scm *display_helper (scm*, bool, char*, bool);
|
||||
|
||||
scm *
|
||||
display (scm *x)
|
||||
{
|
||||
return display_helper (x, false, "");
|
||||
return display_helper (x, false, "", false);
|
||||
}
|
||||
scm scm_display = {FUNCTION1, .name="display", .function1 = &display};
|
||||
|
||||
scm *
|
||||
display_helper (scm *x, bool cont, char *sep)
|
||||
newline ()
|
||||
{
|
||||
puts ("");
|
||||
return &scm_unspecified;
|
||||
}
|
||||
scm scm_newline = {FUNCTION0, .name="newline", .function0 = &newline};
|
||||
|
||||
scm *
|
||||
display_helper (scm *x, bool cont, char *sep, bool quote)
|
||||
{
|
||||
scm *r;
|
||||
printf (sep);
|
||||
if (x == &scm_nil) printf ("()");
|
||||
else if (x == &scm_t) printf ("#t");
|
||||
else if (x == &scm_f) printf ("#f");
|
||||
else if (x == &scm_unspecified) printf ("#<unspecified>");
|
||||
else if (x == &scm_quote) printf ("quote");
|
||||
|
||||
else if (x == &scm_label) printf ("label");
|
||||
else if (x == &scm_lambda) printf ("lambda");
|
||||
|
||||
else if (x == &scm_car) printf ("car");
|
||||
else if (x == &scm_cdr) printf ("cdr");
|
||||
else if (x == &scm_cons) printf ("cons");
|
||||
else if (x == &scm_cond) printf ("cond");
|
||||
else if (x == &scm_eq_p) printf ("eq");
|
||||
else if (x == &scm_null_p) printf ("null");
|
||||
else if (x == &scm_pair_p) printf ("pair");
|
||||
else if (x == &scm_quote) printf ("quote");
|
||||
|
||||
else if (x->type == NUMBER) printf ("%d", x->value);
|
||||
else if (x->type == NUMBER) printf ("0");
|
||||
else if (x->type == ATOM) printf (x->name);
|
||||
if (x->type == NUMBER) printf ("%d", x->value);
|
||||
else if (x->type == PAIR) {
|
||||
#if QUOTE_SUGAR
|
||||
if (car (x) == &scm_quote) {
|
||||
printf ("'");
|
||||
return display_helper (car (cdr (x)), cont, "");
|
||||
return display_helper (car (cdr (x)), cont, "", true);
|
||||
}
|
||||
#if QUASIQUOTE
|
||||
if (car (x) == &scm_quasiquote) {
|
||||
printf ("`");
|
||||
return display_helper (car (cdr (x)), cont, "", true);
|
||||
}
|
||||
if (car (x) == &scm_unquote) {
|
||||
printf (",");
|
||||
return display_helper (car (cdr (x)), cont, "", true);
|
||||
}
|
||||
#endif
|
||||
#endif
|
||||
if (!cont) printf ("(");
|
||||
display (car (x));
|
||||
if (cdr (x)->type == PAIR)
|
||||
display_helper (cdr (x), true, " ");
|
||||
display_helper (cdr (x), true, " ", false);
|
||||
else if (cdr (x) != &scm_nil) {
|
||||
printf (" . ");
|
||||
display (cdr (x));
|
||||
}
|
||||
if (!cont) printf (")");
|
||||
}
|
||||
else if ((r = cossa (x, environment)) != &scm_f)
|
||||
printf (car (r)->name);
|
||||
else if (atom (x) == &scm_t) printf (x->name);
|
||||
|
||||
return &scm_unspecified;
|
||||
}
|
||||
|
|
@ -558,13 +619,13 @@ readword (int c, char* w, scm *a)
|
|||
{
|
||||
if (c == EOF && !w) return &scm_nil;
|
||||
if (c == '\n' && !w) return readword (getchar (), w, a);
|
||||
if (c == EOF || c == '\n') return lookup (w);
|
||||
if (c == EOF || c == '\n') return lookup (w, a);
|
||||
if (c == ' ') return readword ('\n', w, a);
|
||||
if (c == '(' && !w) return readlis (a);
|
||||
if (c == '(') {ungetchar (c); return lookup (w);}
|
||||
if (c == '(') {ungetchar (c); return lookup (w, a);}
|
||||
if (c == ')' && !w) {ungetchar (c); return &scm_nil;}
|
||||
if (c == ')') {ungetchar (c); return lookup (w);}
|
||||
if (c == '\'' && !w) {return cons (lookup ("'"),
|
||||
if (c == ')') {ungetchar (c); return lookup (w, a);}
|
||||
if (c == '\'' && !w) {return cons (lookup ("'", a),
|
||||
cons (readword (getchar (), w, a),
|
||||
&scm_nil));}
|
||||
if (c == ';') {readcomment (c); return readword ('\n', w, a);}
|
||||
|
|
@ -586,11 +647,11 @@ readlis (scm *a)
|
|||
}
|
||||
|
||||
scm *
|
||||
read ()
|
||||
readenv (scm *a)
|
||||
{
|
||||
return readword (getchar (), 0, environment);
|
||||
return readword (getchar (), 0, a);
|
||||
}
|
||||
scm scm_read = {FUNCTION0, .function0 = &read};
|
||||
scm scm_readenv = {FUNCTION1, .function1 = &readenv};
|
||||
|
||||
scm *
|
||||
add_environment (scm *a, char *name, scm* x)
|
||||
|
|
@ -614,32 +675,178 @@ minus (scm *a, scm *b)
|
|||
return make_number (a->value - b->value);
|
||||
}
|
||||
|
||||
scm scm_less_p = {FUNCTION2, .function2 = &less_p};
|
||||
scm scm_minus = {FUNCTION2, .function2 = &minus};
|
||||
scm scm_less_p = {FUNCTION2, .name="<", .function2 = &less_p};
|
||||
scm scm_minus = {FUNCTION2, .name="-", .function2 = &minus};
|
||||
|
||||
scm *global_environment;
|
||||
|
||||
scm *
|
||||
fill_environment ()
|
||||
apply_environment (scm *fn, scm *x, scm *a)
|
||||
{
|
||||
return apply (fn, x, append (a, global_environment));
|
||||
}
|
||||
|
||||
scm *
|
||||
eval_environment (scm *e, scm *a)
|
||||
{
|
||||
return eval (e, append (a, global_environment));
|
||||
}
|
||||
|
||||
//scm scm_cond = {FUNCTION2, .name="cond", .function2 = &evcon};
|
||||
scm scm_eval = {FUNCTION2, .name="eval", .function2 = &eval_environment};
|
||||
scm scm_apply = {FUNCTION3, .name="apply", .function3 = &apply_environment};
|
||||
|
||||
scm *
|
||||
initial_environment ()
|
||||
{
|
||||
scm_cond.function2 = &evcon;
|
||||
|
||||
scm *a = &scm_nil;
|
||||
|
||||
a = add_environment (a, "()", &scm_nil);
|
||||
a = add_environment (a, "#t", &scm_t);
|
||||
a = add_environment (a, "#f", &scm_f);
|
||||
a = add_environment (a, "*unspecified*", &scm_unspecified);
|
||||
|
||||
a = add_environment (a, "label", &scm_label);
|
||||
a = add_environment (a, "lambda", &scm_lambda);
|
||||
|
||||
a = add_environment (a, "atom", &scm_atom);
|
||||
a = add_environment (a, "car", &scm_car);
|
||||
a = add_environment (a, "cdr", &scm_cdr);
|
||||
a = add_environment (a, "cons", &scm_cons);
|
||||
a = add_environment (a, "cond", &scm_cond);
|
||||
a = add_environment (a, "eq", &scm_eq_p);
|
||||
|
||||
a = add_environment (a, "null", &scm_null_p);
|
||||
a = add_environment (a, "pair", &scm_pair_p);
|
||||
a = add_environment (a, "quote", &scm_quote);
|
||||
a = add_environment (a, "'", &scm_quote);
|
||||
|
||||
#if QUASIQUOTE
|
||||
a = add_environment (a, "quasiquote", &scm_quasiquote);
|
||||
a = add_environment (a, "unquote", &scm_unquote);
|
||||
a = add_environment (a, ",", &scm_unquote);
|
||||
a = add_environment (a, "`", &scm_quasiquote);
|
||||
#endif
|
||||
|
||||
a = add_environment (a, "evlis", &scm_evlis);
|
||||
a = add_environment (a, "evcon", &scm_evcon);
|
||||
a = add_environment (a, "pairlis", &scm_pairlis);
|
||||
a = add_environment (a, "assoc", &scm_assoc);
|
||||
|
||||
a = add_environment (a, "eval", &scm_eval);
|
||||
a = add_environment (a, "apply", &scm_apply);
|
||||
|
||||
a = add_environment (a, "readenv", &scm_readenv);
|
||||
a = add_environment (a, "display", &scm_display);
|
||||
a = add_environment (a, "newline", &scm_newline);
|
||||
|
||||
a = add_environment (a, "builtin", &scm_builtin_p);
|
||||
a = add_environment (a, "number", &scm_number_p);
|
||||
a = add_environment (a, "call", &scm_call);
|
||||
|
||||
a = add_environment (a, "define", &scm_define);
|
||||
|
||||
a = add_environment (a, "<", &scm_less_p);
|
||||
a = add_environment (a, "-", &scm_minus);
|
||||
|
||||
// DERIVED
|
||||
a = add_environment (a, "caar", &scm_caar);
|
||||
a = add_environment (a, "cadr", &scm_cadr);
|
||||
a = add_environment (a, "cdar", &scm_cdar);
|
||||
a = add_environment (a, "cddr", &scm_cddr);
|
||||
a = add_environment (a, "caadr", &scm_caadr);
|
||||
a = add_environment (a, "caddr", &scm_caddr);
|
||||
a = add_environment (a, "cdadr", &scm_cdadr);
|
||||
a = add_environment (a, "cadar", &scm_cadar);
|
||||
a = add_environment (a, "cddar", &scm_cddar);
|
||||
a = add_environment (a, "cdddr", &scm_cdddr);
|
||||
|
||||
a = add_environment (a, "append", &scm_append);
|
||||
|
||||
a = add_environment (a, "*macro*", &scm_nil);
|
||||
|
||||
// Hmm
|
||||
//a = add_environment (a, "*a*", &scm_nil);
|
||||
global_environment = add_environment (a, "*a*", a);
|
||||
return a;
|
||||
}
|
||||
|
||||
#if QUASIQUOTE
|
||||
scm *
|
||||
eval_quasiquote (scm *e, scm *a)
|
||||
{
|
||||
if (e == &scm_nil) return e;
|
||||
else if (atom (e) == &scm_t) return e;
|
||||
else if (car (e) == &scm_unquote)
|
||||
return eval (cadr (e), a);
|
||||
else if (car (e) == &scm_quote)
|
||||
return cadr (e);
|
||||
else if (car (e) == &scm_quasiquote)
|
||||
return cadr (e);
|
||||
return cons (car (e), eval_quasiquote (cdr (e), a));
|
||||
}
|
||||
#endif
|
||||
|
||||
scm *
|
||||
define_lambda (scm *x, scm *a)
|
||||
{
|
||||
return cons (caadr (x), cons (&scm_lambda, cons (cdadr (x), cddr (x))));
|
||||
}
|
||||
|
||||
scm *
|
||||
define (scm *x, scm *a)
|
||||
{
|
||||
if (atom (cadr (x)) != &scm_f)
|
||||
return cons (cadr (x), eval (caddr (x), a));
|
||||
return define_lambda (x, a);
|
||||
}
|
||||
|
||||
scm *
|
||||
define_macro (scm *x, scm *a)
|
||||
{
|
||||
return cons (&scm_macro,
|
||||
cons (define_lambda (x, a),
|
||||
cdr (assoc (&scm_macro, a))));
|
||||
}
|
||||
|
||||
scm *
|
||||
loop (scm *r, scm *e, scm *a)
|
||||
{
|
||||
//global_environment = add_environment (a, "*a*", a);
|
||||
if (e == &scm_nil) return r; //a;
|
||||
else if (eq_p (e, make_atom ("exit")) == &scm_t)
|
||||
return apply (cdr (assoc (make_atom ("loop"), a)),
|
||||
cons (&scm_unspecified, cons (&scm_t, cons (a, &scm_nil))), a);
|
||||
else if (atom (e) == &scm_t)
|
||||
return loop (eval (e, a), readenv (a), a);
|
||||
else if (eq_p (car (e), make_atom ("define")) == &scm_t)
|
||||
return loop (&scm_unspecified,
|
||||
readenv (a),
|
||||
cons (define (e, a), a));
|
||||
else if (eq_p (car (e), make_atom ("define-macro")) == &scm_t)
|
||||
return loop (&scm_unspecified,
|
||||
readenv (a),
|
||||
cons (define_macro (e, a), a));
|
||||
return loop (eval (e, a), readenv (a), a);
|
||||
}
|
||||
|
||||
int
|
||||
main (int argc, char *argv[])
|
||||
{
|
||||
environment = fill_environment ();
|
||||
|
||||
scm *program = read ();
|
||||
scm *a = initial_environment ();
|
||||
//global_environment = a;
|
||||
scm *x = readenv (a);
|
||||
#if DEBUG
|
||||
printf ("program=");
|
||||
display (x);
|
||||
puts ("");
|
||||
display (program);
|
||||
puts ("\n =>");
|
||||
#endif
|
||||
scm *result;
|
||||
result = eval (program, environment);
|
||||
display (result);
|
||||
puts ("");
|
||||
exit (0);
|
||||
//display (eval (x, a));
|
||||
display (loop (&scm_unspecified, x, a));
|
||||
// loop (&scm_unspecified, x, a);
|
||||
//loop (&scm_unspecified, read (), initial_environment ());
|
||||
newline ();
|
||||
return 0;
|
||||
}
|
||||
|
|
|
|||
120
mes.mes
Normal file
120
mes.mes
Normal file
|
|
@ -0,0 +1,120 @@
|
|||
;; -*-scheme-*-
|
||||
;;
|
||||
(define (caar x) (car (car x)))
|
||||
(define (cadr x) (car (cdr x)))
|
||||
(define (cdar x) (cdr (car x)))
|
||||
(define (cddr x) (cdr (cdr x)))
|
||||
(define (caadr x) (car (car (cdr x))))
|
||||
(define (caddr x) (car (cdr (cdr x))))
|
||||
(define (cddar x) (cdr (cdr (car x))))
|
||||
(define (cdadr x) (cdr (car (cdr x))))
|
||||
(define (cadar x) (car (cdr (car x))))
|
||||
(define (cdddr x) (cdr (cdr (cdr x))))
|
||||
|
||||
;; Page 12
|
||||
(define (pairlis x y a)
|
||||
(debug "pairlis x=~a y=~a a=~a\n" x y a)
|
||||
(cond
|
||||
((null x) a)
|
||||
(#t (cons (cons (car x) (car y))
|
||||
(pairlis (cdr x) (cdr y) a)))))
|
||||
|
||||
(define (assoc x a)
|
||||
;;(stderr "assoc x=~a\n" x)
|
||||
(debug "assoc x=~a a=~a\n" x a)
|
||||
(cond
|
||||
((null a) #f)
|
||||
((eq (caar a) x) (car a))
|
||||
(#t (assoc x (cdr a)))))
|
||||
|
||||
;; Page 13
|
||||
(define (eval-quote fn x)
|
||||
(debug "eval-quote fn=~a x=~a" fn x)
|
||||
(apply fn x '()))
|
||||
|
||||
(define (apply fn x a)
|
||||
(debug "apply fn=~a x=~a a=~a\n" fn x a)
|
||||
(cond
|
||||
((atom fn)
|
||||
(debug "(atom fn)=~a\n" (atom fn))
|
||||
(cond
|
||||
;; John McCarthy LISP 1.5
|
||||
;; ((eq fn CAR) (caar x))
|
||||
;; ((eq fn CDR) (cdar x))
|
||||
;; ((eq fn CONS) (cons (car x) (cadr x)))
|
||||
;; ((eq fn ATOM) (atom (car x)))
|
||||
;; ((eq fn EQ) (eq (car x) (cadr x)))
|
||||
((builtin fn) (call fn x))
|
||||
(#t (apply (eval fn a) x a))))
|
||||
;; John McCarthy LISP 1.5
|
||||
((eq (car fn) 'single-line-LAMBDA) (eval (caddr fn) (pairlis (cadr fn) x a)))
|
||||
((eq (car fn) 'lambda)
|
||||
;; (CDDR fn) all eval
|
||||
(cond ((null (cdr (cddr fn)))
|
||||
(eval (caddr fn) (pairlis (cadr fn) x a)))
|
||||
(#t
|
||||
(eval (caddr fn) (pairlis (cadr fn) x a))
|
||||
(apply (cons (car fn) (cons (cadr fn) (cdddr fn)))
|
||||
x
|
||||
(pairlis (cadr fn) x a)))))
|
||||
((eq (car fn) 'label) (apply (caddr fn) x (cons (cons (cadr fn)
|
||||
(caddr fn)) a)))))
|
||||
|
||||
(define (eval e a)
|
||||
(debug "eval e=~a a=~a\n" e a)
|
||||
;;(debug "eval (atom ~a)=~a\n" e (atom e))
|
||||
(cond
|
||||
;;((and (stderr "NUMBER? ~a ==> ~a\n" e (number e)) #f))
|
||||
((number e) e)
|
||||
;; error: extra
|
||||
((atom e) (cond ((eq (assoc e a) #f)
|
||||
(stderr "no such symbol: ~a\n" e)
|
||||
(guile:exit 1))
|
||||
(#t (cdr (assoc e a)))))
|
||||
((atom e) (cdr (assoc e a)))
|
||||
((builtin e) e)
|
||||
;;((and (stderr "eeee: ~a\n" e) #f))
|
||||
((atom (car e))
|
||||
(cond
|
||||
((eq (car e) 'quote) (cadr e))
|
||||
((eq (car e) 'cond) (evcon (cdr e) a))
|
||||
;; EXTRA: macro expandszor
|
||||
;;((and (stderr "2eeee: ~a\n" (cdr (assoc '*macro* a))) #f))
|
||||
(;;;(pair (assoc (car e) (cdr (assoc '*macro* a))))
|
||||
#f
|
||||
;;(stderr "macro: ~a\n" (assoc (car e) (cdr (assoc '*macro* a))))
|
||||
(stderr "apply: ~a ~a\n"
|
||||
`(cons 'lambda (cdr (cdr
|
||||
,(assoc (car e) (cdr (assoc '*macro* a)))
|
||||
)))
|
||||
`(evlis ,(cddr e) a)
|
||||
;;'(evlist foobar)
|
||||
)
|
||||
(eval (apply
|
||||
`(cons 'lambda (cdr (cdr
|
||||
,(assoc (car e) (cdr (assoc '*macro* a)))
|
||||
)))
|
||||
`(evlis ,(cddr e) a)
|
||||
a)
|
||||
a))
|
||||
(#t (apply (car e) (evlis (cdr e) a) a))))
|
||||
(#t (apply (car e) (evlis (cdr e) a) a))))
|
||||
|
||||
(define (evcon c a)
|
||||
(debug "evcon c=~a a=~a\n" c a)
|
||||
(cond
|
||||
;; single-statement cond
|
||||
;; ((eval (caar c) a) (eval (cadar c) a))
|
||||
((eval (caar c) a)
|
||||
(cond ((null (cddar c)) (eval (cadar c) a))
|
||||
(#t (eval (cadar c) a)
|
||||
(evcon
|
||||
(cons (cons #t (cddar c)) '())
|
||||
a))))
|
||||
(#t (evcon (cdr c) a))))
|
||||
|
||||
(define (evlis m a)
|
||||
(debug "evlis m=~a a=~a\n" m a)
|
||||
(cond
|
||||
((null m) '())
|
||||
(#t (cons (eval (car m) a) (evlis (cdr m) a)))))
|
||||
201
mes.scm
Normal file → Executable file
201
mes.scm
Normal file → Executable file
|
|
@ -1,6 +1,6 @@
|
|||
#! /bin/sh
|
||||
# -*-scheme-*-
|
||||
exec guile -L $(pwd) -e '(scm)' -s "$0" "$@"
|
||||
exec guile -L $(pwd) -e '(mes)' -s "$0" "$@"
|
||||
!#
|
||||
|
||||
;;; Mes --- The Maxwell Equations of Software
|
||||
|
|
@ -24,7 +24,7 @@ exec guile -L $(pwd) -e '(scm)' -s "$0" "$@"
|
|||
;; The Maxwell Equations of Software -- John McCarthy page 13
|
||||
;; http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf
|
||||
|
||||
(define-module (scm)
|
||||
(define-module (mes)
|
||||
#:export (main))
|
||||
|
||||
(set-current-module
|
||||
|
|
@ -34,12 +34,16 @@ exec guile -L $(pwd) -e '(scm)' -s "$0" "$@"
|
|||
;; Debugging
|
||||
apply
|
||||
cons*
|
||||
current-output-port
|
||||
current-error-port
|
||||
current-output-port
|
||||
display
|
||||
eof-object?
|
||||
exit
|
||||
force-output
|
||||
format
|
||||
newline
|
||||
read
|
||||
with-input-from-string
|
||||
|
||||
;; Guile admin
|
||||
module-define!
|
||||
|
|
@ -52,6 +56,13 @@ exec guile -L $(pwd) -e '(scm)' -s "$0" "$@"
|
|||
eq?
|
||||
null?
|
||||
pair?
|
||||
|
||||
;; ADDITIONAL PRIMITIVES
|
||||
apply
|
||||
number?
|
||||
procedure?
|
||||
<
|
||||
-
|
||||
)
|
||||
#:renamer (symbol-prefix-proc 'guile:)))))
|
||||
|
||||
|
|
@ -82,101 +93,117 @@ exec guile -L $(pwd) -e '(scm)' -s "$0" "$@"
|
|||
(define cons guile:cons)
|
||||
(define eq guile:eq?)
|
||||
(define null guile:null?)
|
||||
(define pair guile:pair?)
|
||||
(define builtin guile:procedure?)
|
||||
(define number guile:number?)
|
||||
(define call guile:apply)
|
||||
|
||||
(include "mes.mes")
|
||||
|
||||
(define ATOM 'atom)
|
||||
(define CAR 'car)
|
||||
(define CDR 'cdr)
|
||||
(define COND 'cond)
|
||||
(define CONS 'cons)
|
||||
(define EQ 'eq)
|
||||
(define LABEL 'label)
|
||||
(define LAMBDA 'lambda)
|
||||
(define NIL '())
|
||||
(define QUOTE 'quote)
|
||||
(define (append x y)
|
||||
(cond ((null x) y)
|
||||
(#t (cons (car x) (append (cdr x) y)))))
|
||||
|
||||
(define (caar x) (guile:car (guile:car x)))
|
||||
(define (cadr x) (guile:car (guile:cdr x)))
|
||||
(define (cdar x) (guile:car (guile:cdr (guile:car x))))
|
||||
(define (caddr x) (guile:car (guile:cdr (guile:cdr x))))
|
||||
(define (cadar x) (guile:car (guile:cdr (guile:car x))))
|
||||
(define (eval-environment e a)
|
||||
(eval e (append a environment)))
|
||||
|
||||
;; Page 12
|
||||
(define (pairlis x y a)
|
||||
(debug "pairlis x=~a y=~a a=~a\n" x y a)
|
||||
(cond
|
||||
((null x) a)
|
||||
(#t (cons (cons (car x) (car y))
|
||||
(pairlis (cdr x) (cdr y) a)))))
|
||||
(define (apply-environment fn e a)
|
||||
(apply fn e (append a environment)))
|
||||
|
||||
(define (assoc x a)
|
||||
(debug "assoc x=~a a=~a\n" x a)
|
||||
(cond
|
||||
((eq (caar a) x) (car a))
|
||||
(#t (assoc x (cdr a)))))
|
||||
(define (readenv a)
|
||||
(let ((x (guile:read)))
|
||||
(if (guile:eof-object? x) '()
|
||||
x)))
|
||||
|
||||
;; Page 13
|
||||
(define (eval-quote fn x)
|
||||
(debug "eval-quote fn=~a x=~a" fn x)
|
||||
(apply fn x NIL))
|
||||
(define environment
|
||||
`(
|
||||
(() . ())
|
||||
(#t . #t)
|
||||
(#f . #f)
|
||||
|
||||
(define (apply fn x a)
|
||||
(debug "apply fn=~a x=~a a=~a\n" fn x a)
|
||||
(cond
|
||||
((atom fn)
|
||||
(debug "(atom fn)=~a\n" (atom fn))
|
||||
(cond
|
||||
((eq fn CAR) (caar x))
|
||||
((eq fn CDR) (cdar x))
|
||||
((eq fn CONS) (cons (car x) (cadr x)))
|
||||
((eq fn ATOM) (atom (car x)))
|
||||
((eq fn EQ) (eq (car x) (cadr x)))
|
||||
(#t (apply (eval fn a) x a))))
|
||||
((eq (car fn) LAMBDA) (eval (caddr fn) (pairlis (cadr fn) x a)))
|
||||
((eq (car fn) LABEL) (apply (caddr fn) x (cons (cons (cadr fn)
|
||||
(caddr fn)) a)))))
|
||||
(*unspecified* . ,*unspecified*)
|
||||
|
||||
(define (eval e a)
|
||||
(debug "eval e=~a a=~a\n" e a)
|
||||
(debug "eval (atom ~a)=~a\n" e (atom e))
|
||||
(cond
|
||||
((atom e) (cdr (assoc e a)))
|
||||
((atom (car e))
|
||||
(cond
|
||||
((eq (car e) QUOTE) (cadr e))
|
||||
((eq (car e) COND) (evcon (cdr e) a))
|
||||
(#t (apply (car e) (evlis (cdr e) a) a))))
|
||||
(#t (apply (car e) (evlis (cdr e) a) a))))
|
||||
(atom . ,atom)
|
||||
(car . ,car)
|
||||
(cdr . ,cdr)
|
||||
(cons . ,cons)
|
||||
(cond . ,evcon)
|
||||
(eq . ,eq)
|
||||
|
||||
(define (evcon c a)
|
||||
(debug "evcon c=~a a=~a\n" c a)
|
||||
(cond
|
||||
((eval (caar c) a) (eval (cadar c) a))
|
||||
(#t (evcon (cdr c) a))))
|
||||
(null . ,null)
|
||||
(pair . ,guile:pair?)
|
||||
;;(quote . ,quote)
|
||||
|
||||
(define (evlis m a)
|
||||
(debug "evlis m=~a a=~a\n" m a)
|
||||
(cond
|
||||
((null m) NIL)
|
||||
(#t (cons (eval (car m) a) (evlis (cdr m) a)))))
|
||||
(evlis . ,evlis)
|
||||
(evcon . ,evcon)
|
||||
(pairlis . ,pairlis)
|
||||
(assoc . ,assoc)
|
||||
|
||||
(eval . ,eval-environment)
|
||||
(apply . ,apply-environment)
|
||||
|
||||
(readenv . ,readenv)
|
||||
(display . ,guile:display)
|
||||
(newline . ,guile:newline)
|
||||
|
||||
(builtin . ,builtin)
|
||||
(number . ,number)
|
||||
(call . ,call)
|
||||
|
||||
(< . ,guile:<)
|
||||
(- . ,guile:-)
|
||||
|
||||
;; DERIVED
|
||||
(caar . ,caar)
|
||||
(cadr . ,cadr)
|
||||
(cdar . ,cdar)
|
||||
(cddr . ,cddr)
|
||||
(caadr . ,caadr)
|
||||
(caddr . ,caddr)
|
||||
(cdadr . ,cdadr)
|
||||
(cadar . ,cadar)
|
||||
(cddar . ,cddar)
|
||||
(cdddr . ,cdddr)
|
||||
|
||||
(append . ,append)
|
||||
(exit . ,guile:exit)
|
||||
|
||||
(*macro* . ())
|
||||
|
||||
;;
|
||||
(stderr . ,stderr)))
|
||||
|
||||
(define (mes-define-lambda x a)
|
||||
(cons (caadr x) (cons 'lambda (cons (cdadr x) (cddr x)))))
|
||||
|
||||
(define (mes-define x a)
|
||||
(if (atom (cadr x))
|
||||
(cons (cadr x) (eval (caddr x) a))
|
||||
(mes-define-lambda x a)))
|
||||
|
||||
(define (mes-define-macro x a)
|
||||
(cons '*macro*
|
||||
(cons (mes-define-lambda x a)
|
||||
(cdr (assoc '*macro* a)))))
|
||||
|
||||
(define (loop r e a)
|
||||
(cond ((null e) r)
|
||||
((eq e 'exit)
|
||||
(apply (cdr (assoc 'loop a))
|
||||
(cons *unspecified* (cons #t (cons a '())))
|
||||
a))
|
||||
((atom e) (loop (eval e a) (readenv a) a))
|
||||
((eq (car e) 'define)
|
||||
(loop *unspecified* (readenv a) (cons (mes-define e a) a)))
|
||||
((eq (car e) 'define-macro)
|
||||
(loop *unspecified* (readenv a) (cons (mes-define-macro e a) a)))
|
||||
(#t (loop (eval e a) (readenv a) a))))
|
||||
|
||||
(define (main arguments)
|
||||
(stdout "Hello scm\n")
|
||||
(guile:display (eval 0 '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (eval 1 '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (eval '(car '(0 1)) '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (eval '(cdr '(0 1)) '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (apply 'cons '(0 1) '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (eval '(cons 0 1) '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (apply '(lambda (x y) (cons x y)) '(0 1) '((0 . 0) (1 . 1))))
|
||||
(guile:newline)
|
||||
(guile:display (eval '((label fun (lambda (x) x)) 2 2) '((2 . 2))))
|
||||
(let ((a (append environment `((*a* . ,environment)))))
|
||||
;;(guile:display (eval (readenv a) a))
|
||||
(guile:display (loop *unspecified* (readenv a) a))
|
||||
)
|
||||
(guile:newline))
|
||||
|
||||
(guile:module-define! (guile:resolve-interface '(scm)) 'main main)
|
||||
(guile:module-define! (guile:resolve-interface '(mes)) 'main main)
|
||||
|
|
|
|||
20
mes.test
Executable file
20
mes.test
Executable file
|
|
@ -0,0 +1,20 @@
|
|||
#! /bin/sh
|
||||
mes=${1-./mes.scm}
|
||||
echo 0 | $mes
|
||||
echo 1 | $mes
|
||||
#echo car | $mes "((0 1))"
|
||||
echo "(car '(0 1))" | $mes
|
||||
#echo cdr | $mes "((0 1))"
|
||||
echo "(cdr '(0 1))" | $mes
|
||||
#echo cons | $mes "(0 1)"
|
||||
echo "(cons 0 1)" | $mes
|
||||
#echo "(lambda (x y) (cons x y))" | $mes "(0 1)"
|
||||
echo "((lambda (x y) (cons x y)) 0 1)" | $mes
|
||||
echo "((label fun (lambda (x) x)) 2 2)" | $mes
|
||||
echo "(< 0 0)" | $mes
|
||||
echo "(< 0 1)" | $mes
|
||||
echo "((label fun\
|
||||
(lambda (x) (cons x\
|
||||
(cond ((< 0 x) (fun (- x 1)))\
|
||||
(#t '())))))\
|
||||
3)" | $mes
|
||||
67
scm.mes
Executable file
67
scm.mes
Executable file
|
|
@ -0,0 +1,67 @@
|
|||
#! /bin/sh
|
||||
# -*-scheme-*-
|
||||
exec ./mes "$@" < "$0"
|
||||
!#
|
||||
|
||||
;;; Mes --- Maxwell Equations of Software
|
||||
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
|
||||
;;;
|
||||
;;; 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/>.
|
||||
|
||||
;; The Maxwell Equations of Software -- John McCarthy page 13
|
||||
;; http://www.softwarepreservation.org/projects/LISP/book/LISP%201.5%20Programmers%20Manual.pdf
|
||||
|
||||
(display 'boo)
|
||||
(newline)
|
||||
|
||||
;; (display '*a*:)
|
||||
;; (display (eval '*a* '()))
|
||||
;; (newline)
|
||||
|
||||
(define (+ x y) (- x (- 0 y)))
|
||||
|
||||
(display (+ 3 4))
|
||||
(newline)
|
||||
|
||||
(define-macro (and x y)
|
||||
(cond (x y)
|
||||
(#t #f)))
|
||||
|
||||
(define-macro (or x y)
|
||||
(cond (x x)
|
||||
(#t y)))
|
||||
|
||||
(define (split-params bindings params)
|
||||
(cond ((null bindings) params)
|
||||
(#t (split-params (cdr bindings)
|
||||
(append params (cons (caar bindings) '()))))))
|
||||
|
||||
(define (split-values bindings values)
|
||||
(cond ((null bindings) values)
|
||||
(#t (split-values (cdr bindings)
|
||||
(append values (cdar bindings) '())))))
|
||||
|
||||
;; (define-macro (let bindings body)
|
||||
;; (cons (cons 'lambda (cons (split-params bindings '()) body))
|
||||
;; (split-values bindings '())))
|
||||
|
||||
(display 'and-0-1:)
|
||||
(display (and 0 1))
|
||||
(newline)
|
||||
|
||||
(display 'or-#f-1:)
|
||||
(display (or #f 2))
|
||||
(newline)
|
||||
Loading…
Reference in a new issue