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fallback to unary minus is 'arith' with operation code 'unm'

This commit is contained in:
Roberto Ierusalimschy 1994-11-21 11:30:15 -02:00
parent 93ccdd52ef
commit 96ea2e0fb4
3 changed files with 9 additions and 8 deletions
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3
fallback.c
View File

@ -3,7 +3,7 @@
** TecCGraf - PUC-Rio
*/
char *rcs_fallback="$Id: fallback.c,v 1.6 1994/11/16 17:38:08 roberto Exp roberto $";
char *rcs_fallback="$Id: fallback.c,v 1.7 1994/11/18 19:46:21 roberto Exp roberto $";
#include <stdio.h>
@ -33,7 +33,6 @@ struct FB luaI_fallBacks[] = {
{"arith", {LUA_T_CFUNCTION, arithFB}},
{"order", {LUA_T_CFUNCTION, orderFB}},
{"concat", {LUA_T_CFUNCTION, concatFB}},
{"unminus", {LUA_T_CFUNCTION, arithFB}},
{"settable", {LUA_T_CFUNCTION, gettableFB}},
{"gc", {LUA_T_CFUNCTION, GDFB}}
};

7
fallback.h
View File

@ -1,5 +1,5 @@
/*
** $Id: fallback.h,v 1.4 1994/11/10 17:36:54 roberto Exp roberto $
** $Id: fallback.h,v 1.5 1994/11/18 19:46:21 roberto Exp roberto $
*/
#ifndef fallback_h
@ -18,9 +18,8 @@ extern struct FB {
#define FB_ARITH 3
#define FB_ORDER 4
#define FB_CONCAT 5
#define FB_UNMINUS 6
#define FB_SETTABLE 7
#define FB_GC 8
#define FB_SETTABLE 6
#define FB_GC 7
void luaI_setfallback (void);
int luaI_lock (Object *object);

7
opcode.c
View File

@ -3,7 +3,7 @@
** TecCGraf - PUC-Rio
*/
char *rcs_opcode="$Id: opcode.c,v 3.17 1994/11/17 21:23:43 roberto Exp roberto $";
char *rcs_opcode="$Id: opcode.c,v 3.18 1994/11/18 19:46:21 roberto Exp roberto $";
#include <setjmp.h>
#include <stdio.h>
@ -989,7 +989,10 @@ static int lua_execute (Byte *pc, int base)
case MINUSOP:
if (tonumber(top-1))
do_call(&luaI_fallBacks[FB_UNMINUS].function, (top-stack)-1, 1, (top-stack)-1);
{
tag(top++) = LUA_T_NIL;
call_arith("unm");
}
else
nvalue(top-1) = - nvalue(top-1);
break;