Fcalva/cyclone
1
0
Fork 0
mirror of https://github.com/justinethier/cyclone.git synced 2025-07-16 09:17:35 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

Return the "void" object from I/O functions

Browse source 
Primarily need this to prevent duplicate output in the REPL when calling functions such as (write).
This commit is contained in:
Justin Ethier 2015-06-11 22:13:46 -04:00
parent 9b6596e146
commit 741835bc49
3 changed files with 12 additions and 12 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
cyclone.h
View file

@ -87,10 +87,6 @@ typedef long tag_type;
#define boolean_tag 15
#define cvar_tag 16
#define vector_tag 17
/* TODO: need a type to return from things like
(if #f #t) and (write 1) so the REPL will not print
anything for them:
void_tag */
#define nil NULL
#define eq(x,y) (x == y)

19
runtime.c
View file

@ -68,6 +68,9 @@ const object boolean_f = &f_boolean;
static symbol_type Cyc_191procedure_symbol = {symbol_tag, "procedure", nil};
const object quote_Cyc_191procedure = &Cyc_191procedure_symbol;
static symbol_type Cyc_void_symbol = {symbol_tag, "", nil};
const object quote_void = &Cyc_void_symbol;
/* Symbol Table */
/* Notes for the symbol table
@ -323,8 +326,8 @@ object Cyc_display(object x, FILE *port)
{object tmp = nil;
object has_cycle = boolean_f;
int i = 0;
if (nullp(x)) {fprintf(port, "()"); return x;}
if (obj_is_char(x)) {fprintf(port, "%c", obj_obj2char(x)); return x;}
if (nullp(x)) {fprintf(port, "()"); return quote_void;}
if (obj_is_char(x)) {fprintf(port, "%c", obj_obj2char(x)); return quote_void;}
switch (type_of(x))
{case closure0_tag:
case closure1_tag:
@ -403,7 +406,7 @@ object Cyc_display(object x, FILE *port)
break;
default:
fprintf(port, "Cyc_display: bad tag x=%ld\n", ((closure)x)->tag); getchar(); exit(0);}
return x;}
return quote_void;}
object dispatch_write_va(int argc, object clo, object cont, object x, ...) {
object result;
@ -437,8 +440,8 @@ static object _Cyc_write(object x, FILE *port)
{object tmp = nil;
object has_cycle = boolean_f;
int i = 0;
if (nullp(x)) {fprintf(port, "()"); return x;}
if (obj_is_char(x)) {fprintf(port, "#\\%c", obj_obj2char(x)); return x;}
if (nullp(x)) {fprintf(port, "()"); return quote_void;}
if (obj_is_char(x)) {fprintf(port, "#\\%c", obj_obj2char(x)); return quote_void;}
switch (type_of(x))
{case string_tag:
fprintf(port, "\"%s\"", ((string_type *) x)->str);
@ -476,7 +479,7 @@ static object _Cyc_write(object x, FILE *port)
break;
default:
Cyc_display(x, port);}
return x;}
return quote_void;}
object Cyc_write(object x, FILE *port)
{object y = _Cyc_write(x, port);
@ -486,11 +489,11 @@ object Cyc_write(object x, FILE *port)
object Cyc_write_char(object c, object port)
{
if (obj_is_char(c)) {
fprintf(((port_type *)port)->fp, "%c", obj_obj2char(c)); return c;
fprintf(((port_type *)port)->fp, "%c", obj_obj2char(c));
} else {
Cyc_rt_raise2("Argument is not a character", c);
}
return c;
return quote_void;
}
/* Some of these non-consing functions have been optimized from CPS. */

1
runtime.h
View file

@ -224,6 +224,7 @@ extern jmp_buf jmp_main; /* Where to jump to. */
extern const object boolean_t;
extern const object boolean_f;
extern const object quote_Cyc_191procedure;
extern const object quote_void;
/* This section is auto-generated via --autogen */
extern const object primitive_Cyc_91global_91vars;