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builtins.c
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builtins.c
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/*
implementations of some built-in functions and utilities
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <stdarg.h>
#include <setjmp.h>
#include <assert.h>
#include <sys/types.h>
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include <ctype.h>
#include <math.h>
#include "julia.h"
#include "builtin_proto.h"
// exceptions -----------------------------------------------------------------
DLLEXPORT char *julia_home = NULL;
void jl_error(const char *str)
{
jl_value_t *msg = jl_pchar_to_string((char*)str, strlen(str));
JL_GC_PUSH(&msg);
jl_raise(jl_new_struct(jl_errorexception_type, msg));
}
void jl_errorf(const char *fmt, ...)
{
char buf[1024];
va_list args;
va_start(args, fmt);
int nc = vsnprintf(buf, sizeof(buf), fmt, args);
va_end(args);
jl_value_t *msg = jl_pchar_to_string(buf, nc);
JL_GC_PUSH(&msg);
jl_raise(jl_new_struct(jl_errorexception_type, msg));
}
void jl_too_few_args(const char *fname, int min)
{
// TODO: ArgumentError
jl_errorf("%s: too few arguments (expected %d)", fname, min);
}
void jl_too_many_args(const char *fname, int max)
{
jl_errorf("%s: too many arguments (expected %d)", fname, max);
}
void jl_type_error_rt(const char *fname, const char *context,
jl_value_t *ty, jl_value_t *got)
{
jl_value_t *ctxt=NULL;
JL_GC_PUSH(&ctxt, &got);
ctxt = jl_pchar_to_string((char*)context, strlen(context));
jl_value_t *ex = jl_new_struct(jl_typeerror_type, jl_symbol(fname),
ctxt, ty, got);
jl_raise(ex);
}
void jl_type_error(const char *fname, jl_value_t *expected, jl_value_t *got)
{
jl_type_error_rt(fname, "", expected, got);
}
void jl_undef_ref_error(void)
{
jl_raise(jl_undefref_exception);
}
void jl_divide_by_zero_error(void)
{
jl_raise(jl_divbyzero_exception);
}
JL_CALLABLE(jl_f_throw)
{
JL_NARGS(throw, 1, 1);
jl_raise(args[0]);
return (jl_value_t*)jl_null;
}
void jl_enter_handler(jl_savestate_t *ss, jmp_buf *handlr)
{
JL_SIGATOMIC_BEGIN();
ss->eh_task = jl_current_task->state.eh_task;
ss->eh_ctx = jl_current_task->state.eh_ctx;
ss->bt = jl_current_task->state.bt;
ss->ostream_obj = jl_current_task->state.ostream_obj;
ss->current_output_stream = jl_current_task->state.current_output_stream;
ss->prev = jl_current_task->state.prev;
#ifdef JL_GC_MARKSWEEP
ss->gcstack = jl_pgcstack;
#endif
jl_current_task->state.prev = ss;
jl_current_task->state.eh_task = jl_current_task;
jl_current_task->state.eh_ctx = handlr;
jl_current_task->state.bt = 0;
// TODO: this should really go after setjmp(). see comment in
// ctx_switch in task.c.
JL_SIGATOMIC_END();
}
void jl_pop_handler(int n)
{
while (n > 0) {
jl_eh_restore_state(jl_current_task->state.prev);
n--;
}
}
// primitives -----------------------------------------------------------------
JL_CALLABLE(jl_f_is)
{
JL_NARGS(is, 2, 2);
if (args[0] == args[1])
return jl_true;
return jl_false;
}
JL_CALLABLE(jl_f_no_function)
{
jl_error("function not defined");
return (jl_value_t*)jl_null;
}
JL_CALLABLE(jl_f_typeof)
{
JL_NARGS(typeof, 1, 1);
return jl_full_type(args[0]);
}
JL_CALLABLE(jl_f_subtype)
{
JL_NARGS(subtype, 2, 2);
if (!jl_is_typevar(args[0]))
JL_TYPECHK(subtype, type, args[0]);
if (!jl_is_typevar(args[1]))
JL_TYPECHK(subtype, type, args[1]);
return (jl_subtype(args[0],args[1],0) ? jl_true : jl_false);
}
JL_CALLABLE(jl_f_isa)
{
JL_NARGS(isa, 2, 2);
JL_TYPECHK(isa, type, args[1]);
return (jl_subtype(args[0],args[1],1) ? jl_true : jl_false);
}
JL_CALLABLE(jl_f_typeassert)
{
JL_NARGS(typeassert, 2, 2);
JL_TYPECHK(typeassert, type, args[1]);
if (!jl_subtype(args[0],args[1],1))
jl_type_error("typeassert", args[1], args[0]);
return args[0];
}
static jl_function_t *jl_append_any_func;
JL_CALLABLE(jl_f_apply)
{
JL_NARGSV(apply, 1);
JL_TYPECHK(apply, function, args[0]);
if (nargs == 2 && jl_is_tuple(args[1])) {
return jl_apply((jl_function_t*)args[0], &jl_tupleref(args[1],0),
((jl_tuple_t*)args[1])->length);
}
size_t n=0, i, j;
for(i=1; i < nargs; i++) {
if (jl_is_tuple(args[i])) {
n += ((jl_tuple_t*)args[i])->length;
}
else if (jl_typeis(args[i], jl_array_any_type)) {
n += jl_array_len(args[i]);
}
else {
if (jl_append_any_func == NULL) {
jl_append_any_func =
(jl_function_t*)jl_get_global(jl_base_module,
jl_symbol("append_any"));
if (jl_append_any_func == NULL) {
// error if append_any not available
JL_TYPECHK(apply, tuple, args[i]);
}
}
goto fancy_apply;
}
}
jl_value_t **newargs = alloca(n * sizeof(jl_value_t*));
n = 0;
for(i=1; i < nargs; i++) {
if (jl_is_tuple(args[i])) {
jl_tuple_t *t = (jl_tuple_t*)args[i];
for(j=0; j < t->length; j++)
newargs[n++] = jl_tupleref(t, j);
}
else {
size_t al = jl_array_len(args[i]);
for(j=0; j < al; j++)
newargs[n++] = jl_cellref(args[i], j);
}
}
return jl_apply((jl_function_t*)args[0], newargs, n);
fancy_apply: ;
jl_value_t *argarr = jl_apply(jl_append_any_func, &args[1], nargs-1);
JL_GC_PUSH(&argarr);
assert(jl_typeis(argarr, jl_array_any_type));
jl_value_t *result = jl_apply((jl_function_t*)args[0],
jl_cell_data(argarr), jl_array_len(argarr));
JL_GC_POP();
return result;
}
// eval -----------------------------------------------------------------------
jl_value_t *jl_toplevel_eval_flex(jl_value_t *e, int fast, int *plineno);
jl_value_t *jl_eval_module_expr(jl_expr_t *ex, int *plineno)
{
assert(ex->head == module_sym);
jl_module_t *last_module = jl_current_module;
jl_sym_t *name = (jl_sym_t*)jl_exprarg(ex, 0);
if (!jl_is_symbol(name)) {
jl_type_error("module", (jl_value_t*)jl_sym_type, (jl_value_t*)name);
}
if (name == jl_current_module->name) {
jl_errorf("module name %s conflicts with enclosing module", name->name);
}
jl_binding_t *b = jl_get_binding_wr(jl_current_module, name);
jl_declare_constant(b);
if (b->value != NULL) {
ios_printf(ios_stderr, "Warning: redefinition of module %s ignored\n",
name->name);
return jl_nothing;
}
jl_module_t *newm = jl_new_module(name);
b->value = (jl_value_t*)newm;
if (jl_current_module == jl_core_module && name == jl_symbol("Base")) {
// pick up Base module during bootstrap, and stay within it
// after loading.
jl_base_module = last_module = newm;
}
JL_GC_PUSH(&last_module);
jl_current_module = newm;
// TODO: set up imports and exports
jl_array_t *exprs = ((jl_expr_t*)jl_exprarg(ex, 1))->args;
JL_TRY {
for(int i=0; i < exprs->length; i++) {
// process toplevel form
jl_value_t *form = jl_cellref(exprs, i);
if (jl_is_linenode(form)) {
if (plineno)
*plineno = jl_linenode_line(form);
}
else {
(void)jl_toplevel_eval_flex(form, 0, plineno);
}
}
}
JL_CATCH {
JL_GC_POP();
jl_current_module = last_module;
jl_raise(jl_exception_in_transit);
}
JL_GC_POP();
jl_current_module = last_module;
return jl_nothing;
}
static int is_intrinsic(jl_sym_t *s)
{
jl_value_t *v = jl_get_global(jl_current_module, s);
return (v != NULL && jl_typeof(v)==(jl_type_t*)jl_intrinsic_type);
}
static int has_intrinsics(jl_expr_t *e)
{
if (e->args->length == 0)
return 0;
if (e->head == static_typeof_sym) return 1;
jl_value_t *e0 = jl_exprarg(e,0);
if (e->head == call_sym &&
((jl_is_symbol(e0) && is_intrinsic((jl_sym_t*)e0)) ||
(jl_is_topnode(e0) && is_intrinsic((jl_sym_t*)jl_fieldref(e0,0)))))
return 1;
int i;
for(i=0; i < e->args->length; i++) {
jl_value_t *a = jl_exprarg(e,i);
if (jl_is_expr(a) && has_intrinsics((jl_expr_t*)a))
return 1;
}
return 0;
}
// heuristic for whether a top-level input should be evaluated with
// the compiler or the interpreter.
static int eval_with_compiler_p(jl_expr_t *expr, int compileloops)
{
assert(jl_is_expr(expr));
if (expr->head==body_sym && compileloops) {
jl_array_t *body = expr->args;
size_t i, maxlabl=0;
// compile if there are backwards branches
for(i=0; i < body->length; i++) {
jl_value_t *stmt = jl_cellref(body,i);
if (jl_is_labelnode(stmt)) {
int l = jl_labelnode_label(stmt);
if (l > maxlabl) maxlabl = l;
}
}
size_t sz = (maxlabl+1+7)/8;
char *labls = alloca(sz); memset(labls,0,sz);
for(i=0; i < body->length; i++) {
jl_value_t *stmt = jl_cellref(body,i);
if (jl_is_labelnode(stmt)) {
int l = jl_labelnode_label(stmt);
labls[l/8] |= (1<<(l&7));
}
else if (compileloops && jl_is_gotonode(stmt)) {
int l = jl_gotonode_label(stmt);
if (labls[l/8]&(1<<(l&7))) {
return 1;
}
}
else if (jl_is_expr(stmt)) {
if (compileloops && ((jl_expr_t*)stmt)->head==goto_ifnot_sym) {
int l = jl_unbox_long(jl_exprarg(stmt,1));
if (labls[l/8]&(1<<(l&7))) {
return 1;
}
}
// to compile code that uses exceptions
/*
if (((jl_expr_t*)stmt)->head == enter_sym) {
return 1;
}
*/
}
}
}
if (has_intrinsics(expr)) return 1;
return 0;
}
extern int jl_in_inference;
jl_value_t *jl_toplevel_eval_flex(jl_value_t *e, int fast, int *plineno)
{
//jl_show(ex);
//ios_printf(ios_stdout, "\n");
if (!jl_is_expr(e))
return jl_interpret_toplevel_expr(e);
jl_expr_t *ex = (jl_expr_t*)e;
if (ex->head == null_sym || ex->head == error_sym) {
// expression types simple enough not to need expansion
return jl_interpret_toplevel_expr(e);
}
if (ex->head == module_sym) {
return jl_eval_module_expr(ex, plineno);
}
jl_value_t *thunk=NULL;
jl_value_t *result;
jl_lambda_info_t *thk=NULL;
int ewc = 0;
JL_GC_PUSH(&thunk, &thk, &ex);
if (ex->head != body_sym && ex->head != thunk_sym) {
// not yet expanded
ex = (jl_expr_t*)jl_expand(e);
}
if (jl_is_expr(ex) && ex->head == thunk_sym) {
thk = (jl_lambda_info_t*)jl_exprarg(ex,0);
assert(jl_is_lambda_info(thk));
ewc = eval_with_compiler_p(jl_lam_body((jl_expr_t*)thk->ast), fast);
if (!ewc) {
jl_array_t *vinfos = jl_lam_vinfo((jl_expr_t*)thk->ast);
int i;
for(i=0; i < vinfos->length; i++) {
if (jl_vinfo_capt((jl_array_t*)jl_cellref(vinfos,i))) {
// interpreter doesn't handle closure environment
ewc = 1;
break;
}
}
}
}
else {
if (jl_is_expr(ex) && eval_with_compiler_p((jl_expr_t*)ex, fast)) {
thk = jl_wrap_expr((jl_value_t*)ex);
ewc = 1;
}
else {
result = jl_interpret_toplevel_expr((jl_value_t*)ex);
JL_GC_POP();
return result;
}
}
if (ewc) {
thunk = (jl_value_t*)jl_new_closure(NULL, (jl_value_t*)jl_null, thk);
if (!jl_in_inference) {
jl_type_infer(thk, jl_tuple_type, thk);
}
result = jl_apply((jl_function_t*)thunk, NULL, 0);
}
else {
result = jl_interpret_toplevel_thunk(thk);
}
JL_GC_POP();
return result;
}
jl_value_t *jl_toplevel_eval(jl_value_t *v)
{
return jl_toplevel_eval_flex(v, 1, NULL);
}
int asprintf(char **strp, const char *fmt, ...);
// repeatedly call jl_parse_next and eval everything
void jl_parse_eval_all(char *fname)
{
int lineno=0;
jl_value_t *fn=NULL, *ln=NULL, *form=NULL;
JL_GC_PUSH(&fn, &ln, &form);
JL_TRY {
jl_register_toplevel_eh();
// handle syntax error
while (1) {
form = jl_parse_next(&lineno);
if (form == NULL)
break;
if (jl_is_expr(form)) {
if (((jl_expr_t*)form)->head == jl_continue_sym) {
jl_errorf("syntax error: %s", jl_string_data(jl_exprarg(form,0)));
}
if (((jl_expr_t*)form)->head == error_sym) {
jl_interpret_toplevel_expr(form);
}
}
(void)jl_toplevel_eval_flex(form, 0, &lineno);
}
}
JL_CATCH {
jl_stop_parsing();
fn = jl_pchar_to_string(fname, strlen(fname));
ln = jl_box_long(lineno);
jl_raise(jl_new_struct(jl_loaderror_type, fn, ln,
jl_exception_in_transit));
}
jl_stop_parsing();
JL_GC_POP();
}
// fpath needs to be freed if != fname
char *jl_find_file_in_path(const char *fname)
{
char *fpath = (char*)fname;
int fid = open (fpath, O_RDONLY);
// try adding julia home
if (fid == -1 && julia_home && fname[0] != '/') {
asprintf(&fpath, "%s/%s", julia_home, fname);
fid = open (fpath, O_RDONLY);
}
if (fid == -1) {
if (fpath != fname) free(fpath);
if (jl_errorexception_type == NULL) {
ios_printf(ios_stderr, "could not open file %s\n", fname);
exit(1);
}
else {
jl_errorf("could not open file %s", fname);
}
}
close(fid);
return fpath;
}
void jl_load(const char *fname)
{
char *fpath = jl_find_file_in_path(fname);
jl_start_parsing_file(fpath);
jl_parse_eval_all(fpath);
if (fpath != fname) free(fpath);
}
DLLEXPORT void jl_load_(jl_value_t *str)
{
jl_load(jl_string_data(str));
}
JL_CALLABLE(jl_f_top_eval)
{
if (nargs == 1) {
return jl_toplevel_eval(args[0]);
}
if (nargs != 2) {
JL_NARGS(eval, 1, 1);
}
JL_TYPECHK(eval, module, args[0]);
jl_module_t *m = (jl_module_t*)args[0];
if (jl_is_symbol(args[1])) {
return jl_eval_global_var(m, (jl_sym_t*)args[1]);
}
return jl_interpret_toplevel_expr_in(m, args[1], NULL, 0);
}
JL_CALLABLE(jl_f_isbound)
{
jl_module_t *m = jl_current_module;
jl_sym_t *s=NULL;
if (nargs == 1) {
JL_TYPECHK(isbound, symbol, args[0]);
s = (jl_sym_t*)args[0];
}
if (nargs != 2) {
JL_NARGS(isbound, 1, 1);
}
else {
JL_TYPECHK(isbound, module, args[0]);
JL_TYPECHK(isbound, symbol, args[1]);
m = (jl_module_t*)args[0];
s = (jl_sym_t*)args[1];
}
assert(s);
return jl_boundp(m, s) ? jl_true : jl_false;
}
// tuples ---------------------------------------------------------------------
JL_CALLABLE(jl_f_tuple)
{
size_t i;
if (nargs == 0) return (jl_value_t*)jl_null;
jl_tuple_t *t = jl_alloc_tuple_uninit(nargs);
for(i=0; i < nargs; i++) {
jl_tupleset(t, i, args[i]);
}
return (jl_value_t*)t;
}
JL_CALLABLE(jl_f_tupleref)
{
JL_NARGS(tupleref, 2, 2);
JL_TYPECHK(tupleref, tuple, args[0]);
JL_TYPECHK(tupleref, long, args[1]);
jl_tuple_t *t = (jl_tuple_t*)args[0];
size_t i = jl_unbox_long(args[1])-1;
if (i >= t->length)
jl_error("tupleref: index out of range");
return jl_tupleref(t, i);
}
JL_CALLABLE(jl_f_tuplelen)
{
JL_NARGS(tuplelen, 1, 1);
JL_TYPECHK(tuplelen, tuple, args[0]);
return jl_box_long(((jl_tuple_t*)args[0])->length);
}
// structs --------------------------------------------------------------------
static size_t field_offset(jl_struct_type_t *t, jl_sym_t *fld, int err)
{
jl_tuple_t *fn = t->names;
size_t i;
for(i=0; i < fn->length; i++) {
if (jl_tupleref(fn,i) == (jl_value_t*)fld) {
return i;
}
}
if (err)
jl_errorf("type %s has no field %s", t->name->name->name, fld->name);
return -1;
}
size_t jl_field_offset(jl_struct_type_t *t, jl_sym_t *fld)
{
return field_offset(t, fld, 0);
}
static jl_value_t *nth_field(jl_value_t *v, size_t i)
{
jl_value_t *fld = ((jl_value_t**)v)[1+i];
if (fld == NULL)
jl_undef_ref_error();
return fld;
}
JL_CALLABLE(jl_f_get_field)
{
JL_NARGS(getfield, 2, 2);
JL_TYPECHK(getfield, symbol, args[1]);
jl_value_t *v = args[0];
jl_value_t *vt = (jl_value_t*)jl_typeof(v);
if (!jl_is_struct_type(vt))
jl_type_error("getfield", (jl_value_t*)jl_struct_kind, v);
size_t i = field_offset((jl_struct_type_t*)vt, (jl_sym_t*)args[1], 1);
return nth_field(v, i);
}
JL_CALLABLE(jl_f_set_field)
{
JL_NARGS(setfield, 3, 3);
JL_TYPECHK(setfield, symbol, args[1]);
jl_value_t *v = args[0];
jl_value_t *vt = (jl_value_t*)jl_typeof(v);
if (!jl_is_struct_type(vt))
jl_type_error("setfield", (jl_value_t*)jl_struct_kind, v);
jl_struct_type_t *st = (jl_struct_type_t*)vt;
size_t i = field_offset(st, (jl_sym_t*)args[1], 1);
jl_value_t *ft = jl_tupleref(st->types,i);
if (!jl_subtype(args[2], ft, 1)) {
jl_type_error("setfield", ft, args[2]);
}
((jl_value_t**)v)[1+i] = args[2];
return args[2];
}
JL_CALLABLE(jl_f_field_type)
{
JL_NARGS(fieldtype, 2, 2);
JL_TYPECHK(fieldtype, symbol, args[1]);
jl_value_t *v = args[0];
jl_value_t *vt = (jl_value_t*)jl_typeof(v);
if (!jl_is_struct_type(vt))
jl_type_error("fieldtype", (jl_value_t*)jl_struct_kind, v);
jl_struct_type_t *st = (jl_struct_type_t*)vt;
size_t i = field_offset(st, (jl_sym_t*)args[1], 1);
return jl_tupleref(st->types, i);
}
// conversion -----------------------------------------------------------------
static jl_value_t *convert(jl_type_t *to, jl_value_t *x, jl_function_t *conv_f)
{
jl_value_t *args[2];
if (jl_subtype(x, (jl_value_t*)to, 1))
return x;
args[0] = (jl_value_t*)to; args[1] = x;
return jl_apply(conv_f, args, 2);
}
JL_CALLABLE(jl_f_convert_tuple)
{
jl_tuple_t *to = (jl_tuple_t*)args[0];
jl_tuple_t *x = (jl_tuple_t*)args[1];
if (to == jl_tuple_type)
return (jl_value_t*)x;
size_t i, cl=x->length, pl=to->length;
jl_tuple_t *out = jl_alloc_tuple(cl);
JL_GC_PUSH(&out);
jl_value_t *ce, *pe=NULL;
int pseq=0;
jl_function_t *f = (jl_function_t*)args[2];
for(i=0; i < cl; i++) {
ce = jl_tupleref(x,i);
if (pseq) {
}
else if (i < pl) {
pe = jl_tupleref(to,i);
if (jl_is_seq_type(pe)) {
pe = jl_tparam0(pe);
pseq = 1;
}
}
else {
out = NULL;
break;
}
assert(pe != NULL);
jl_tupleset(out, i, convert((jl_type_t*)pe, ce, f));
}
JL_GC_POP();
if (out == NULL)
jl_error("convert: invalid tuple conversion");
return (jl_value_t*)out;
}
JL_CALLABLE(jl_f_convert_default)
{
jl_type_t *to = (jl_type_t*)args[0];
jl_value_t *x = args[1];
if (!jl_subtype(x, (jl_value_t*)to, 1)) {
jl_no_method_error((jl_function_t*)args[2], args, 2);
}
return x;
}
DLLEXPORT void *jl_symbol_name(jl_sym_t *s)
{
return s->name;
}
DLLEXPORT void *jl_array_ptr(jl_array_t *a)
{
return a->data;
}
// printing -------------------------------------------------------------------
DLLEXPORT void jl_print_array_uint8(jl_array_t *b)
{
ios_write(jl_current_output_stream(), (char*)b->data, b->length);
}
DLLEXPORT void jl_print_symbol(jl_sym_t *sym)
{
ios_puts(sym->name, jl_current_output_stream());
}
// for bootstrap
DLLEXPORT void jl_print_int64(int64_t i)
{
ios_printf(jl_current_output_stream(), "%lld", i);
}
DLLEXPORT int jl_strtod(char *str, double *out)
{
char *p;
errno = 0;
*out = strtod(str, &p);
if (p == str ||
(errno==ERANGE && (*out==0 || *out==HUGE_VAL || *out==-HUGE_VAL)))
return 1;
while (*p != '\0') {
if (!isspace(*p))
return 1;
p++;
}
return 0;
}
DLLEXPORT int jl_strtof(char *str, float *out)
{
char *p;
errno = 0;
*out = strtof(str, &p);
if (p == str ||
(errno==ERANGE && (*out==0 || *out==HUGE_VALF || *out==-HUGE_VALF)))
return 1;
while (*p != '\0') {
if (!isspace(*p))
return 1;
p++;
}
return 0;
}
// showing --------------------------------------------------------------------
static jl_function_t *jl_show_gf=NULL;
void jl_show(jl_value_t *v)
{
if (jl_base_module) {
if (jl_show_gf == NULL) {
jl_show_gf = (jl_function_t*)jl_get_global(jl_base_module, jl_symbol("show"));
}
jl_apply(jl_show_gf, &v, 1);
}
}
// comma_one prints a comma for 1 element, e.g. "(x,)"
void jl_show_tuple(jl_tuple_t *t, char opn, char cls, int comma_one)
{
ios_t *s = jl_current_output_stream();
ios_putc(opn, s);
size_t i, n=t->length;
for(i=0; i < n; i++) {
jl_show(jl_tupleref(t, i));
if ((i < n-1) || (n==1 && comma_one))
ios_putc(',', s);
}
ios_putc(cls, s);
}
static void show_function(jl_value_t *v)
{
ios_t *s = jl_current_output_stream();
if (jl_is_gf(v)) {
ios_puts(jl_gf_name(v)->name, s);
}
else {
ios_puts("#<function>", s);
}
}
static void show_type(jl_value_t *t)
{
ios_t *s = jl_current_output_stream();
if (jl_is_union_type(t)) {
if (t == (jl_value_t*)jl_bottom_type) {
ios_write(s, "None", 4);
}
else if (t == jl_top_type) {
ios_write(s, "Top", 3);
}
else {
ios_write(s, "Union", 5);
jl_show_tuple(((jl_uniontype_t*)t)->types, '(', ')', 0);
}
}
else if (jl_is_seq_type(t)) {
jl_show(jl_tparam0(t));
ios_write(s, "...", 3);
}
else if (jl_is_typector(t)) {
jl_show((jl_value_t*)((jl_typector_t*)t)->body);
}
else {
assert(jl_is_some_tag_type(t));
jl_tag_type_t *tt = (jl_tag_type_t*)t;
ios_puts(tt->name->name->name, s);
jl_tuple_t *p = tt->parameters;
if (p->length > 0)
jl_show_tuple(p, '{', '}', 0);
}
}
DLLEXPORT void jl_show_any(jl_value_t *v)
{
// fallback for printing some other builtin types
ios_t *s = jl_current_output_stream();
if (jl_is_tuple(v)) {
jl_show_tuple((jl_tuple_t*)v, '(', ')', 1);
}
else if (jl_is_type(v)) {
show_type(v);
}
else if (jl_is_func(v)) {
show_function(v);
}
else if (jl_typeis(v,jl_intrinsic_type)) {
ios_printf(s, "#<intrinsic-function %d>", *(uint32_t*)jl_bits_data(v));
}
else {
jl_value_t *t = (jl_value_t*)jl_typeof(v);
if (jl_is_struct_type(t)) {
jl_struct_type_t *st = (jl_struct_type_t*)t;
ios_puts(st->name->name->name, s);
ios_putc('(', s);
size_t i;
size_t n = st->names->length;
for(i=0; i < n; i++) {
jl_show(nth_field(v, i));
if (i < n-1)
ios_putc(',', s);
}
ios_putc(')', s);
}
}
}
// internal functions ---------------------------------------------------------
JL_CALLABLE(jl_trampoline)
{
assert(jl_is_func(F));
assert(((jl_function_t*)F)->linfo != NULL);
/* // to run inference on all thunks. slows down loading files.
if (F->linfo->inferred == jl_false) {
if (!jl_in_inference) {
jl_type_infer(F->linfo, jl_tuple_type, F->linfo);
}
}*/
jl_compile((jl_function_t*)F);
assert(((jl_function_t*)F)->fptr == &jl_trampoline);
jl_generate_fptr((jl_function_t*)F);
return jl_apply((jl_function_t*)F, args, nargs);
}
JL_CALLABLE(jl_f_instantiate_type)
{
JL_NARGSV(instantiate_type, 1);
if (!jl_is_some_tag_type(args[0]))
JL_TYPECHK(instantiate_type, typector, args[0]);
return jl_apply_type_(args[0], &args[1], nargs-1);
}
static void check_supertype(jl_value_t *super, char *name)
{
if (!jl_is_tag_type(super) || super == (jl_value_t*)jl_sym_type ||
super == (jl_value_t*)jl_undef_type ||
jl_subtype(super,(jl_value_t*)jl_type_type,0) ||
jl_subtype(super,(jl_value_t*)jl_array_type,0)) {
jl_errorf("invalid subtyping in definition of %s", name);
}
}
JL_CALLABLE(jl_f_new_struct_type)
{
JL_NARGS(new_struct_type, 4, 4);
JL_TYPECHK(new_struct_type, symbol, args[0]);
JL_TYPECHK(new_struct_type, tuple, args[1]);
JL_TYPECHK(new_struct_type, tuple, args[2]);
if (args[3] != (jl_value_t*)jl_nothing)
JL_TYPECHK(new_struct_type, function, args[3]);
jl_sym_t *name = (jl_sym_t*)args[0];
jl_tuple_t *params = (jl_tuple_t*)args[1];
jl_tuple_t *fnames = (jl_tuple_t*)args[2];
jl_struct_type_t *nst =
jl_new_struct_type(name, jl_any_type, params, fnames, NULL);
nst->ctor_factory = args[3];
return (jl_value_t*)nst;
}
void jl_add_constructors(jl_struct_type_t *t);
void jl_reinstantiate_inner_types(jl_tag_type_t *t);
static void check_type_tuple(jl_tuple_t *t, jl_sym_t *name, const char *ctx)
{
size_t i;
for(i=0; i < t->length; i++) {
jl_value_t *elt = jl_tupleref(t,i);
if (!jl_is_type(elt) && !jl_is_typevar(elt)) {
jl_type_error_rt(name->name, ctx, (jl_value_t*)jl_type_type, elt);
}
}
}
JL_CALLABLE(jl_f_new_struct_fields)
{
JL_NARGS(new_struct_fields, 3, 3);
jl_value_t *super = args[1];
JL_TYPECHK(new_struct_fields, tuple, args[2]);
jl_value_t *t = args[0];
jl_tuple_t *ftypes = (jl_tuple_t*)args[2];
if (!jl_is_struct_type(t))
jl_error("you can't do that.");
jl_struct_type_t *st = (jl_struct_type_t*)t;
if (st->types != NULL) {
// type already exists. redefinition ignored.
return (jl_value_t*)jl_nothing;
}
check_type_tuple(ftypes, st->name->name, "type definition");
check_supertype(super, st->name->name->name);
st->super = (jl_tag_type_t*)super;
assert(jl_is_tag_type(super));
st->types = ftypes;
if (st->parameters->length > 0) {
// once the full structure is built, use instantiate_type to walk it
// and tie up self-references.
st->name->cache = jl_null;
jl_reinstantiate_inner_types((jl_tag_type_t*)st);
}
jl_add_constructors(st);
return (jl_value_t*)jl_nothing;
}
JL_CALLABLE(jl_f_new_type_constructor)
{
JL_NARGS(new_type_constructor, 2, 2);
JL_TYPECHK(new_type_constructor, tuple, args[0]);
if (!jl_is_type(args[1]))
jl_type_error("typealias", (jl_value_t*)jl_type_type, args[1]);
jl_tuple_t *p = (jl_tuple_t*)args[0];
return (jl_value_t*)jl_new_type_ctor(p, (jl_type_t*)args[1]);
}
JL_CALLABLE(jl_f_new_tag_type)
{
JL_NARGS(new_tag_type, 2, 2);
JL_TYPECHK(new_tag_type, symbol, args[0]);
JL_TYPECHK(new_tag_type, tuple, args[1]);
jl_tuple_t *p = (jl_tuple_t*)args[1];
return (jl_value_t*)jl_new_tagtype((jl_value_t*)args[0], jl_any_type, p);
}
JL_CALLABLE(jl_f_new_tag_type_super)
{
JL_NARGS(new_tag_type_super, 2, 2);
JL_TYPECHK(new_tag_type_super, tag_type, args[1]);
jl_tag_type_t *tt = (jl_tag_type_t*)args[0];
jl_value_t *super = args[1];
check_supertype(super, tt->name->name->name);
tt->super = (jl_tag_type_t*)super;
if (tt->parameters->length > 0) {
tt->name->cache = jl_null;
jl_reinstantiate_inner_types((jl_tag_type_t*)tt);
}
return (jl_value_t*)jl_nothing;