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ast.c
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ast.c
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// This file is a part of Julia. License is MIT: https://julialang.org/license
/*
AST
interface to front-end, obtains and translates syntax trees
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef _OS_WINDOWS_
#include <malloc.h>
#endif
#include "julia.h"
#include "julia_internal.h"
#include "flisp.h"
#include "julia_assert.h"
#ifdef __cplusplus
extern "C" {
#endif
// MSVC complains about "julia_flisp.boot.inc : error C4335: Mac file format
// detected: please convert the source file to either DOS or UNIX format"
#ifdef _MSC_VER
#pragma warning(disable:4335)
#endif
// head symbols for each expression type
jl_sym_t *call_sym; jl_sym_t *invoke_sym;
jl_sym_t *dots_sym; jl_sym_t *empty_sym;
jl_sym_t *module_sym; jl_sym_t *slot_sym;
jl_sym_t *export_sym; jl_sym_t *import_sym;
jl_sym_t *importall_sym; jl_sym_t *toplevel_sym;
jl_sym_t *quote_sym; jl_sym_t *amp_sym;
jl_sym_t *top_sym; jl_sym_t *colons_sym;
jl_sym_t *line_sym; jl_sym_t *jl_incomplete_sym;
jl_sym_t *goto_sym; jl_sym_t *goto_ifnot_sym;
jl_sym_t *label_sym; jl_sym_t *return_sym;
jl_sym_t *lambda_sym; jl_sym_t *assign_sym;
jl_sym_t *body_sym; jl_sym_t *globalref_sym;
jl_sym_t *method_sym; jl_sym_t *core_sym;
jl_sym_t *enter_sym; jl_sym_t *leave_sym;
jl_sym_t *exc_sym; jl_sym_t *error_sym;
jl_sym_t *new_sym; jl_sym_t *using_sym;
jl_sym_t *const_sym; jl_sym_t *thunk_sym;
jl_sym_t *underscore_sym;
jl_sym_t *abstracttype_sym; jl_sym_t *primtype_sym;
jl_sym_t *structtype_sym; jl_sym_t *foreigncall_sym;
jl_sym_t *global_sym; jl_sym_t *list_sym;
jl_sym_t *dot_sym; jl_sym_t *newvar_sym;
jl_sym_t *boundscheck_sym; jl_sym_t *inbounds_sym;
jl_sym_t *copyast_sym; jl_sym_t *fastmath_sym;
jl_sym_t *pure_sym; jl_sym_t *simdloop_sym;
jl_sym_t *meta_sym; jl_sym_t *compiler_temp_sym;
jl_sym_t *inert_sym; jl_sym_t *vararg_sym;
jl_sym_t *unused_sym; jl_sym_t *static_parameter_sym;
jl_sym_t *inline_sym; jl_sym_t *noinline_sym;
jl_sym_t *polly_sym;
jl_sym_t *propagate_inbounds_sym; jl_sym_t *generated_sym;
jl_sym_t *generated_only_sym;
jl_sym_t *isdefined_sym; jl_sym_t *nospecialize_sym;
jl_sym_t *macrocall_sym; jl_sym_t *colon_sym;
jl_sym_t *hygienicscope_sym;
jl_sym_t *escape_sym;
jl_sym_t *gc_preserve_begin_sym; jl_sym_t *gc_preserve_end_sym;
static uint8_t flisp_system_image[] = {
#include <julia_flisp.boot.inc>
};
typedef struct _jl_ast_context_list_t {
struct _jl_ast_context_list_t *next;
struct _jl_ast_context_list_t **prev;
} jl_ast_context_list_t;
STATIC_INLINE void jl_ast_context_list_insert(jl_ast_context_list_t **head,
jl_ast_context_list_t *node)
{
jl_ast_context_list_t *next = *head;
if (next)
next->prev = &node->next;
node->next = next;
node->prev = head;
*head = node;
}
STATIC_INLINE void jl_ast_context_list_delete(jl_ast_context_list_t *node)
{
if (node->next)
node->next->prev = node->prev;
*node->prev = node->next;
}
typedef struct _jl_ast_context_t {
fl_context_t fl;
fltype_t *jvtype;
value_t true_sym;
value_t false_sym;
value_t error_sym;
value_t null_sym;
value_t ssavalue_sym;
value_t slot_sym;
jl_ast_context_list_t list;
int ref;
jl_task_t *task; // the current owner (user) of this jl_ast_context_t
jl_module_t *module; // context module for "defined-julia-global" and "current-julia-module-counter"
} jl_ast_context_t;
static jl_ast_context_t jl_ast_main_ctx;
#define jl_ast_ctx(fl_ctx) container_of(fl_ctx, jl_ast_context_t, fl)
#define jl_ast_context_list_item(node) \
container_of(node, jl_ast_context_t, list)
struct macroctx_stack {
jl_module_t *m;
struct macroctx_stack *parent;
};
#define JL_AST_PRESERVE_PUSH(ctx, old, inmodule) \
jl_module_t *(old) = ctx->module; \
ctx->module = (inmodule)
#define JL_AST_PRESERVE_POP(ctx, old) \
ctx->module = (old)
static jl_value_t *scm_to_julia(fl_context_t *fl_ctx, value_t e, jl_module_t *mod);
static value_t julia_to_scm(fl_context_t *fl_ctx, jl_value_t *v);
static jl_value_t *jl_expand_macros(jl_value_t *expr, jl_module_t *inmodule, struct macroctx_stack *macroctx, int onelevel);
value_t fl_defined_julia_global(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
jl_ast_context_t *ctx = jl_ast_ctx(fl_ctx);
// tells whether a var is defined in and *by* the current module
argcount(fl_ctx, "defined-julia-global", nargs, 1);
jl_module_t *mod = ctx->module;
jl_sym_t *sym = (jl_sym_t*)scm_to_julia(fl_ctx, args[0], mod);
if (jl_is_globalref(sym)) {
mod = jl_globalref_mod(sym);
sym = jl_globalref_name(sym);
}
if (!jl_is_symbol(sym))
type_error(fl_ctx, "defined-julia-global", "symbol", args[0]);
if (!mod)
return fl_ctx->F;
jl_binding_t *b = (jl_binding_t*)ptrhash_get(&mod->bindings, sym);
return (b != HT_NOTFOUND && b->owner == mod) ? fl_ctx->T : fl_ctx->F;
}
value_t fl_current_module_counter(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
jl_ast_context_t *ctx = jl_ast_ctx(fl_ctx);
assert(ctx->module);
return fixnum(jl_module_next_counter(ctx->module));
}
// Check whether v is a scalar for purposes of inlining fused-broadcast
// arguments when lowering; should agree with broadcast.jl on what is a
// scalar. When in doubt, return false, since this is only an optimization.
value_t fl_julia_scalar(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
argcount(fl_ctx, "julia-scalar?", nargs, 1);
if (fl_isnumber(fl_ctx, args[0]) || fl_isstring(fl_ctx, args[0]))
return fl_ctx->T;
else if (iscvalue(args[0]) && fl_ctx->jl_sym == cv_type((cvalue_t*)ptr(args[0]))) {
jl_value_t *v = *(jl_value_t**)cptr(args[0]);
if (jl_isa(v,(jl_value_t*)jl_number_type) || jl_is_string(v))
return fl_ctx->T;
}
return fl_ctx->F;
}
static jl_value_t *scm_to_julia_(fl_context_t *fl_ctx, value_t e, jl_module_t *mod);
value_t fl_julia_logmsg(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
int kwargs_len = (int)nargs - 6;
if (nargs < 6 || kwargs_len % 2 != 0) {
lerror(fl_ctx, fl_ctx->ArgError, "julia-logmsg: bad argument list - expected "
"level (symbol) group (symbol) id file line msg . kwargs");
}
value_t arg_level = args[0];
value_t arg_group = args[1];
value_t arg_id = args[2];
value_t arg_file = args[3];
value_t arg_line = args[4];
value_t arg_msg = args[5];
value_t *arg_kwargs = args + 6;
if (!isfixnum(arg_level) || !issymbol(arg_group) || !issymbol(arg_id) ||
!issymbol(arg_file) || !isfixnum(arg_line) || !fl_isstring(fl_ctx, arg_msg)) {
lerror(fl_ctx, fl_ctx->ArgError,
"julia-logmsg: Unexpected type in argument list");
}
// Abuse scm_to_julia here to convert arguments. This is meant for `Expr`s
// but should be good enough provided we're only passing simple numbers,
// symbols and strings.
jl_value_t *group=NULL, *id=NULL, *file=NULL, *line=NULL, *msg=NULL;
jl_array_t *kwargs=NULL;
JL_GC_PUSH6(&group, &id, &file, &line, &msg, &kwargs);
group = scm_to_julia(fl_ctx, arg_group, NULL);
id = scm_to_julia(fl_ctx, arg_id, NULL);
file = scm_to_julia(fl_ctx, arg_file, NULL);
line = scm_to_julia(fl_ctx, arg_line, NULL);
msg = scm_to_julia(fl_ctx, arg_msg, NULL);
kwargs = jl_alloc_vec_any(kwargs_len);
for (int i = 0; i < kwargs_len; ++i) {
jl_array_ptr_set(kwargs, i, scm_to_julia(fl_ctx, arg_kwargs[i], NULL));
}
jl_log(numval(arg_level), NULL, group, id, file, line, (jl_value_t*)kwargs, msg);
JL_GC_POP();
return fl_ctx->T;
}
static const builtinspec_t julia_flisp_ast_ext[] = {
{ "defined-julia-global", fl_defined_julia_global },
{ "current-julia-module-counter", fl_current_module_counter },
{ "julia-scalar?", fl_julia_scalar },
{ "julia-logmsg", fl_julia_logmsg },
{ NULL, NULL }
};
static void jl_init_ast_ctx(jl_ast_context_t *ast_ctx)
{
fl_context_t *fl_ctx = &ast_ctx->fl;
fl_init(fl_ctx, 4*1024*1024);
if (fl_load_system_image_str(fl_ctx, (char*)flisp_system_image,
sizeof(flisp_system_image))) {
jl_error("fatal error loading system image");
}
fl_applyn(fl_ctx, 0, symbol_value(symbol(fl_ctx, "__init_globals")));
jl_ast_context_t *ctx = jl_ast_ctx(fl_ctx);
ctx->jvtype = define_opaque_type(fl_ctx->jl_sym, sizeof(void*), NULL, NULL);
assign_global_builtins(fl_ctx, julia_flisp_ast_ext);
ctx->true_sym = symbol(fl_ctx, "true");
ctx->false_sym = symbol(fl_ctx, "false");
ctx->error_sym = symbol(fl_ctx, "error");
ctx->null_sym = symbol(fl_ctx, "null");
ctx->ssavalue_sym = symbol(fl_ctx, "ssavalue");
ctx->slot_sym = symbol(fl_ctx, "slot");
ctx->task = NULL;
ctx->module = NULL;
set(symbol(fl_ctx, "*depwarn-opt*"), fixnum(jl_options.depwarn));
}
// There should be no GC allocation while holding this lock
static jl_mutex_t flisp_lock;
static jl_ast_context_list_t *jl_ast_ctx_using = NULL;
static jl_ast_context_list_t *jl_ast_ctx_freed = NULL;
static jl_ast_context_t *jl_ast_ctx_enter(void)
{
jl_ptls_t ptls = jl_get_ptls_states();
JL_SIGATOMIC_BEGIN();
JL_LOCK_NOGC(&flisp_lock);
jl_ast_context_list_t *node;
jl_ast_context_t *ctx;
// First check if the current task is using one of the contexts
for (node = jl_ast_ctx_using;node;(node = node->next)) {
ctx = jl_ast_context_list_item(node);
if (ctx->task == ptls->current_task) {
ctx->ref++;
JL_UNLOCK_NOGC(&flisp_lock);
return ctx;
}
}
// If not, grab one from the free list
if ((node = jl_ast_ctx_freed)) {
jl_ast_context_list_delete(node);
jl_ast_context_list_insert(&jl_ast_ctx_using, node);
ctx = jl_ast_context_list_item(node);
ctx->ref = 1;
ctx->task = ptls->current_task;
ctx->module = NULL;
JL_UNLOCK_NOGC(&flisp_lock);
return ctx;
}
// Construct a new one if we can't find any
ctx = (jl_ast_context_t*)calloc(1, sizeof(jl_ast_context_t));
ctx->ref = 1;
ctx->task = ptls->current_task;
node = &ctx->list;
jl_ast_context_list_insert(&jl_ast_ctx_using, node);
JL_UNLOCK_NOGC(&flisp_lock);
jl_init_ast_ctx(ctx);
return ctx;
}
static void jl_ast_ctx_leave(jl_ast_context_t *ctx)
{
JL_SIGATOMIC_END();
if (--ctx->ref)
return;
JL_LOCK_NOGC(&flisp_lock);
ctx->task = NULL;
jl_ast_context_list_t *node = &ctx->list;
jl_ast_context_list_delete(node);
jl_ast_context_list_insert(&jl_ast_ctx_freed, node);
JL_UNLOCK_NOGC(&flisp_lock);
}
void jl_init_frontend(void)
{
jl_ptls_t ptls = jl_get_ptls_states();
if (jl_ast_ctx_using || jl_ast_ctx_freed)
return;
jl_ast_main_ctx.ref = 1;
jl_ast_main_ctx.task = ptls->current_task;
jl_ast_context_list_insert(&jl_ast_ctx_using, &jl_ast_main_ctx.list);
jl_init_ast_ctx(&jl_ast_main_ctx);
// To match the one in jl_ast_ctx_leave
JL_SIGATOMIC_BEGIN();
jl_ast_ctx_leave(&jl_ast_main_ctx);
empty_sym = jl_symbol("");
call_sym = jl_symbol("call");
invoke_sym = jl_symbol("invoke");
foreigncall_sym = jl_symbol("foreigncall");
quote_sym = jl_symbol("quote");
inert_sym = jl_symbol("inert");
top_sym = jl_symbol("top");
core_sym = jl_symbol("core");
globalref_sym = jl_symbol("globalref");
line_sym = jl_symbol("line");
jl_incomplete_sym = jl_symbol("incomplete");
error_sym = jl_symbol("error");
goto_sym = jl_symbol("goto");
goto_ifnot_sym = jl_symbol("gotoifnot");
label_sym = jl_symbol("label");
return_sym = jl_symbol("return");
lambda_sym = jl_symbol("lambda");
module_sym = jl_symbol("module");
export_sym = jl_symbol("export");
import_sym = jl_symbol("import");
using_sym = jl_symbol("using");
importall_sym = jl_symbol("importall");
assign_sym = jl_symbol("=");
body_sym = jl_symbol("body");
colons_sym = jl_symbol("::");
method_sym = jl_symbol("method");
exc_sym = jl_symbol("the_exception");
enter_sym = jl_symbol("enter");
leave_sym = jl_symbol("leave");
new_sym = jl_symbol("new");
const_sym = jl_symbol("const");
global_sym = jl_symbol("global");
thunk_sym = jl_symbol("thunk");
underscore_sym = jl_symbol("_");
amp_sym = jl_symbol("&");
abstracttype_sym = jl_symbol("abstract_type");
primtype_sym = jl_symbol("primitive_type");
structtype_sym = jl_symbol("struct_type");
toplevel_sym = jl_symbol("toplevel");
dot_sym = jl_symbol(".");
colon_sym = jl_symbol(":");
boundscheck_sym = jl_symbol("boundscheck");
inbounds_sym = jl_symbol("inbounds");
fastmath_sym = jl_symbol("fastmath");
newvar_sym = jl_symbol("newvar");
copyast_sym = jl_symbol("copyast");
simdloop_sym = jl_symbol("simdloop");
pure_sym = jl_symbol("pure");
meta_sym = jl_symbol("meta");
dots_sym = jl_symbol("...");
list_sym = jl_symbol("list");
unused_sym = jl_symbol("#unused#");
slot_sym = jl_symbol("slot");
static_parameter_sym = jl_symbol("static_parameter");
compiler_temp_sym = jl_symbol("#temp#");
inline_sym = jl_symbol("inline");
noinline_sym = jl_symbol("noinline");
polly_sym = jl_symbol("polly");
propagate_inbounds_sym = jl_symbol("propagate_inbounds");
isdefined_sym = jl_symbol("isdefined");
nospecialize_sym = jl_symbol("nospecialize");
macrocall_sym = jl_symbol("macrocall");
escape_sym = jl_symbol("escape");
hygienicscope_sym = jl_symbol("hygienic-scope");
gc_preserve_begin_sym = jl_symbol("gc_preserve_begin");
gc_preserve_end_sym = jl_symbol("gc_preserve_end");
generated_sym = jl_symbol("generated");
generated_only_sym = jl_symbol("generated_only");
}
JL_DLLEXPORT void jl_lisp_prompt(void)
{
// Make `--lisp` sigatomic in order to avoid triggering the sigint safepoint.
// We don't have our signal handler registered in that case anyway...
JL_SIGATOMIC_BEGIN();
jl_init_frontend();
jl_ast_context_t *ctx = jl_ast_ctx_enter();
JL_AST_PRESERVE_PUSH(ctx, old_roots, jl_main_module);
fl_context_t *fl_ctx = &ctx->fl;
fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "__start")), fl_cons(fl_ctx, fl_ctx->NIL,fl_ctx->NIL));
JL_AST_PRESERVE_POP(ctx, old_roots);
jl_ast_ctx_leave(ctx);
}
JL_DLLEXPORT void fl_show_profile(void)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
fl_applyn(fl_ctx, 0, symbol_value(symbol(fl_ctx, "show-profiles")));
jl_ast_ctx_leave(ctx);
}
JL_DLLEXPORT void fl_clear_profile(void)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
fl_applyn(fl_ctx, 0, symbol_value(symbol(fl_ctx, "clear-profiles")));
jl_ast_ctx_leave(ctx);
}
JL_DLLEXPORT void fl_profile(const char *fname)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "profile-e")), symbol(fl_ctx, fname));
jl_ast_ctx_leave(ctx);
}
static jl_sym_t *scmsym_to_julia(fl_context_t *fl_ctx, value_t s)
{
assert(issymbol(s));
if (fl_isgensym(fl_ctx, s)) {
char gsname[16];
char *n = uint2str(&gsname[1], sizeof(gsname)-1,
((gensym_t*)ptr(s))->id, 10);
*(--n) = '#';
return jl_symbol(n);
}
return jl_symbol(symbol_name(fl_ctx, s));
}
static jl_value_t *scm_to_julia(fl_context_t *fl_ctx, value_t e, jl_module_t *mod)
{
jl_value_t *v = NULL;
JL_GC_PUSH1(&v);
JL_TRY {
v = scm_to_julia_(fl_ctx, e, mod);
}
JL_CATCH {
// if expression cannot be converted, replace with error expr
jl_expr_t *ex = jl_exprn(error_sym, 1);
v = (jl_value_t*)ex;
jl_array_ptr_set(ex->args, 0, jl_cstr_to_string("invalid AST"));
}
JL_GC_POP();
return v;
}
extern int64_t conv_to_int64(void *data, numerictype_t tag);
static jl_value_t *scm_to_julia_(fl_context_t *fl_ctx, value_t e, jl_module_t *mod)
{
if (fl_isnumber(fl_ctx, e)) {
int64_t i64;
if (isfixnum(e)) {
i64 = numval(e);
}
else {
assert(iscprim(e));
cprim_t *cp = (cprim_t*)ptr(e);
numerictype_t nt = cp_numtype(cp);
switch (nt) {
case T_DOUBLE:
return (jl_value_t*)jl_box_float64(*(double*)cp_data(cp));
case T_FLOAT:
return (jl_value_t*)jl_box_float32(*(float*)cp_data(cp));
case T_UINT8:
return (jl_value_t*)jl_box_uint8(*(uint8_t*)cp_data(cp));
case T_UINT16:
return (jl_value_t*)jl_box_uint16(*(uint16_t*)cp_data(cp));
case T_UINT32:
return (jl_value_t*)jl_box_uint32(*(uint32_t*)cp_data(cp));
case T_UINT64:
return (jl_value_t*)jl_box_uint64(*(uint64_t*)cp_data(cp));
default:
;
}
i64 = conv_to_int64(cp_data(cp), nt);
}
#ifdef _P64
return (jl_value_t*)jl_box_int64(i64);
#else
if (i64 > (int64_t)S32_MAX || i64 < (int64_t)S32_MIN)
return (jl_value_t*)jl_box_int64(i64);
else
return (jl_value_t*)jl_box_int32((int32_t)i64);
#endif
}
if (issymbol(e)) {
if (e == jl_ast_ctx(fl_ctx)->true_sym)
return jl_true;
else if (e == jl_ast_ctx(fl_ctx)->false_sym)
return jl_false;
return (jl_value_t*)scmsym_to_julia(fl_ctx, e);
}
if (fl_isstring(fl_ctx, e))
return jl_pchar_to_string((char*)cvalue_data(e), cvalue_len(e));
if (iscons(e) || e == fl_ctx->NIL) {
value_t hd;
jl_sym_t *sym;
if (e == fl_ctx->NIL) {
hd = e;
}
else {
hd = car_(e);
if (hd == jl_ast_ctx(fl_ctx)->ssavalue_sym)
return jl_box_ssavalue(numval(car_(cdr_(e))));
else if (hd == jl_ast_ctx(fl_ctx)->slot_sym)
return jl_box_slotnumber(numval(car_(cdr_(e))));
else if (hd == jl_ast_ctx(fl_ctx)->null_sym && llength(e) == 1)
return jl_nothing;
}
if (issymbol(hd))
sym = scmsym_to_julia(fl_ctx, hd);
else
sym = list_sym;
size_t n = llength(e)-1;
if (issymbol(hd))
e = cdr_(e);
else
n++;
// nodes with special representations
jl_value_t *ex = NULL, *temp = NULL;
if (sym == line_sym && (n == 1 || n == 2)) {
jl_value_t *linenum = scm_to_julia_(fl_ctx, car_(e), mod);
jl_value_t *file = jl_nothing;
JL_GC_PUSH2(&linenum, &file);
if (n == 2)
file = scm_to_julia_(fl_ctx, car_(cdr_(e)), mod);
temp = jl_new_struct(jl_linenumbernode_type, linenum, file);
JL_GC_POP();
return temp;
}
JL_GC_PUSH1(&ex);
if (sym == label_sym) {
ex = scm_to_julia_(fl_ctx, car_(e), mod);
temp = jl_new_struct(jl_labelnode_type, ex);
}
else if (sym == goto_sym) {
ex = scm_to_julia_(fl_ctx, car_(e), mod);
temp = jl_new_struct(jl_gotonode_type, ex);
}
else if (sym == newvar_sym) {
ex = scm_to_julia_(fl_ctx, car_(e), mod);
temp = jl_new_struct(jl_newvarnode_type, ex);
}
else if (sym == globalref_sym) {
ex = scm_to_julia_(fl_ctx, car_(e), mod);
temp = scm_to_julia_(fl_ctx, car_(cdr_(e)), mod);
assert(jl_is_module(ex));
assert(jl_is_symbol(temp));
temp = jl_module_globalref((jl_module_t*)ex, (jl_sym_t*)temp);
}
else if (sym == top_sym) {
assert(mod && "top should not be generated by the parser");
ex = scm_to_julia_(fl_ctx, car_(e), mod);
assert(jl_is_symbol(ex));
temp = jl_module_globalref(jl_base_relative_to(mod), (jl_sym_t*)ex);
}
else if (sym == core_sym) {
ex = scm_to_julia_(fl_ctx, car_(e), mod);
assert(jl_is_symbol(ex));
temp = jl_module_globalref(jl_core_module, (jl_sym_t*)ex);
}
else if (sym == inert_sym || (sym == quote_sym && (!iscons(car_(e))))) {
ex = scm_to_julia_(fl_ctx, car_(e), mod);
temp = jl_new_struct(jl_quotenode_type, ex);
}
if (temp) {
JL_GC_POP();
return temp;
}
ex = (jl_value_t*)jl_exprn(sym, n);
size_t i;
for (i = 0; i < n; i++) {
assert(iscons(e));
jl_array_ptr_set(((jl_expr_t*)ex)->args, i, scm_to_julia_(fl_ctx, car_(e), mod));
e = cdr_(e);
}
if (sym == lambda_sym)
ex = (jl_value_t*)jl_new_code_info_from_ast((jl_expr_t*)ex);
JL_GC_POP();
if (sym == list_sym)
return (jl_value_t*)((jl_expr_t*)ex)->args;
return (jl_value_t*)ex;
}
if (iscprim(e) && cp_class((cprim_t*)ptr(e)) == fl_ctx->wchartype) {
uint32_t c, u = *(uint32_t*)cp_data((cprim_t*)ptr(e));
if (u < 0x80) {
c = u << 24;
} else {
c = ((u << 0) & 0x0000003f) | ((u << 2) & 0x00003f00) |
((u << 4) & 0x003f0000) | ((u << 6) & 0x3f000000);
c = u < 0x00000800 ? (c << 16) | 0xc0800000 :
u < 0x00010000 ? (c << 8) | 0xe0808000 :
(c << 0) | 0xf0808080 ;
}
return jl_box_char(c);
}
if (iscvalue(e) && cv_class((cvalue_t*)ptr(e)) == jl_ast_ctx(fl_ctx)->jvtype) {
return *(jl_value_t**)cv_data((cvalue_t*)ptr(e));
}
jl_error("malformed tree");
}
static value_t julia_to_scm_(fl_context_t *fl_ctx, jl_value_t *v);
static value_t julia_to_scm(fl_context_t *fl_ctx, jl_value_t *v)
{
value_t temp;
// need try/catch to reset GC handle stack in case of error
FL_TRY_EXTERN(fl_ctx) {
temp = julia_to_scm_(fl_ctx, v);
}
FL_CATCH_EXTERN(fl_ctx) {
temp = fl_ctx->lasterror;
}
return temp;
}
static void array_to_list(fl_context_t *fl_ctx, jl_array_t *a, value_t *pv)
{
if (jl_array_len(a) > 300000)
lerror(fl_ctx, symbol(fl_ctx, "error"), "expression too large");
value_t temp;
for(long i=jl_array_len(a)-1; i >= 0; i--) {
*pv = fl_cons(fl_ctx, fl_ctx->NIL, *pv);
temp = julia_to_scm_(fl_ctx, jl_array_ptr_ref(a,i));
// note: must be separate statement
car_(*pv) = temp;
}
}
static value_t julia_to_list2(fl_context_t *fl_ctx, jl_value_t *a, jl_value_t *b)
{
value_t sa = julia_to_scm_(fl_ctx, a);
fl_gc_handle(fl_ctx, &sa);
value_t sb = julia_to_scm_(fl_ctx, b);
value_t l = fl_list2(fl_ctx, sa, sb);
fl_free_gc_handles(fl_ctx, 1);
return l;
}
static value_t julia_to_scm_(fl_context_t *fl_ctx, jl_value_t *v)
{
if (v == NULL)
lerror(fl_ctx, symbol(fl_ctx, "error"), "undefined reference in AST");
if (jl_is_symbol(v))
return symbol(fl_ctx, jl_symbol_name((jl_sym_t*)v));
if (v == jl_true)
return jl_ast_ctx(fl_ctx)->true_sym;
if (v == jl_false)
return jl_ast_ctx(fl_ctx)->false_sym;
if (v == jl_nothing)
return fl_cons(fl_ctx, jl_ast_ctx(fl_ctx)->null_sym, fl_ctx->NIL);
if (jl_is_expr(v)) {
jl_expr_t *ex = (jl_expr_t*)v;
value_t args = fl_ctx->NIL;
fl_gc_handle(fl_ctx, &args);
array_to_list(fl_ctx, ex->args, &args);
value_t hd = julia_to_scm_(fl_ctx, (jl_value_t*)ex->head);
if (ex->head == lambda_sym && jl_expr_nargs(ex)>0 && jl_is_array(jl_exprarg(ex,0))) {
value_t llist = fl_ctx->NIL;
fl_gc_handle(fl_ctx, &llist);
array_to_list(fl_ctx, (jl_array_t*)jl_exprarg(ex,0), &llist);
car_(args) = llist;
fl_free_gc_handles(fl_ctx, 1);
}
value_t scmv = fl_cons(fl_ctx, hd, args);
fl_free_gc_handles(fl_ctx, 1);
return scmv;
}
// GC Note: jl_fieldref(v, 0) allocate for LabelNode, GotoNode
// but we don't need a GC root here because julia_to_list2
// shouldn't allocate in this case.
if (jl_typeis(v, jl_labelnode_type))
return julia_to_list2(fl_ctx, (jl_value_t*)label_sym, jl_fieldref(v,0));
if (jl_typeis(v, jl_linenumbernode_type)) {
jl_value_t *file = jl_fieldref_noalloc(v,1); // non-allocating
jl_value_t *line = jl_fieldref(v,0); // allocating
value_t args = julia_to_list2(fl_ctx, line, file);
fl_gc_handle(fl_ctx, &args);
value_t hd = julia_to_scm_(fl_ctx, (jl_value_t*)line_sym);
value_t scmv = fl_cons(fl_ctx, hd, args);
fl_free_gc_handles(fl_ctx, 1);
return scmv;
}
if (jl_typeis(v, jl_gotonode_type))
return julia_to_list2(fl_ctx, (jl_value_t*)goto_sym, jl_fieldref(v,0));
if (jl_typeis(v, jl_quotenode_type))
return julia_to_list2(fl_ctx, (jl_value_t*)inert_sym, jl_fieldref(v,0));
if (jl_typeis(v, jl_newvarnode_type))
return julia_to_list2(fl_ctx, (jl_value_t*)newvar_sym, jl_fieldref(v,0));
if (jl_typeis(v, jl_globalref_type)) {
jl_module_t *m = jl_globalref_mod(v);
jl_sym_t *sym = jl_globalref_name(v);
if (m == jl_core_module)
return julia_to_list2(fl_ctx, (jl_value_t*)core_sym,
(jl_value_t*)sym);
value_t args = julia_to_list2(fl_ctx, (jl_value_t*)m, (jl_value_t*)sym);
fl_gc_handle(fl_ctx, &args);
value_t hd = julia_to_scm_(fl_ctx, (jl_value_t*)globalref_sym);
value_t scmv = fl_cons(fl_ctx, hd, args);
fl_free_gc_handles(fl_ctx, 1);
return scmv;
}
if (jl_is_long(v) && fits_fixnum(jl_unbox_long(v)))
return fixnum(jl_unbox_long(v));
if (jl_is_ssavalue(v))
lerror(fl_ctx, symbol(fl_ctx, "error"), "SSAValue objects should not occur in an AST");
if (jl_is_slot(v))
lerror(fl_ctx, symbol(fl_ctx, "error"), "Slot objects should not occur in an AST");
value_t opaque = cvalue(fl_ctx, jl_ast_ctx(fl_ctx)->jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = v;
return opaque;
}
// this is used to parse a line of repl input
JL_DLLEXPORT jl_value_t *jl_parse_input_line(const char *str, size_t len, const char *filename, size_t filename_len)
{
JL_TIMING(PARSING);
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
value_t s = cvalue_static_cstrn(fl_ctx, str, len);
value_t files = cvalue_static_cstrn(fl_ctx, filename, filename_len);
value_t e = fl_applyn(fl_ctx, 2, symbol_value(symbol(fl_ctx, "jl-parse-string")), s, files);
jl_value_t *res = e == fl_ctx->FL_EOF ? jl_nothing : scm_to_julia(fl_ctx, e, NULL);
jl_ast_ctx_leave(ctx);
return res;
}
// this is for parsing one expression out of a string, keeping track of
// the current position.
JL_DLLEXPORT jl_value_t *jl_parse_string(const char *str, size_t len,
int pos0, int greedy)
{
JL_TIMING(PARSING);
if (pos0 < 0 || pos0 > len) {
jl_array_t *buf = jl_pchar_to_array(str, len);
JL_GC_PUSH1(&buf);
// jl_bounds_error roots the arguments.
jl_bounds_error((jl_value_t*)buf, jl_box_long(pos0));
}
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
value_t s = cvalue_static_cstrn(fl_ctx, str, len);
value_t p = fl_applyn(fl_ctx, 3, symbol_value(symbol(fl_ctx, "jl-parse-one-string")),
s, fixnum(pos0), greedy?fl_ctx->T:fl_ctx->F);
jl_value_t *expr=NULL, *pos1=NULL;
JL_GC_PUSH2(&expr, &pos1);
value_t e = car_(p);
if (e == fl_ctx->FL_EOF)
expr = jl_nothing;
else
expr = scm_to_julia(fl_ctx, e, NULL);
pos1 = jl_box_long(tosize(fl_ctx, cdr_(p), "parse"));
jl_ast_ctx_leave(ctx);
jl_value_t *result = (jl_value_t*)jl_svec2(expr, pos1);
JL_GC_POP();
return result;
}
// parse and eval a whole file, possibly reading from a string (`content`)
jl_value_t *jl_parse_eval_all(const char *fname,
const char *content, size_t contentlen,
jl_module_t *inmodule)
{
jl_ptls_t ptls = jl_get_ptls_states();
if (ptls->in_pure_callback)
jl_error("cannot use include inside a generated function");
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
value_t f, ast, expression;
size_t len = strlen(fname);
f = cvalue_static_cstrn(fl_ctx, fname, len);
fl_gc_handle(fl_ctx, &f);
if (content != NULL) {
JL_TIMING(PARSING);
value_t t = cvalue_static_cstrn(fl_ctx, content, contentlen);
fl_gc_handle(fl_ctx, &t);
ast = fl_applyn(fl_ctx, 2, symbol_value(symbol(fl_ctx, "jl-parse-string-stream")), t, f);
fl_free_gc_handles(fl_ctx, 1);
}
else {
JL_TIMING(PARSING);
assert(memchr(fname, 0, len) == NULL); // was checked already in jl_load
ast = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "jl-parse-file")), f);
}
fl_free_gc_handles(fl_ctx, 1);
if (ast == fl_ctx->F) {
jl_ast_ctx_leave(ctx);
jl_errorf("could not open file %s", fname);
}
fl_gc_handle(fl_ctx, &ast);
fl_gc_handle(fl_ctx, &expression);
int last_lineno = jl_lineno;
const char *last_filename = jl_filename;
size_t last_age = jl_get_ptls_states()->world_age;
jl_lineno = 0;
jl_filename = fname;
jl_module_t *old_module = ctx->module;
ctx->module = inmodule;
jl_value_t *form = NULL;
jl_value_t *result = jl_nothing;
int err = 0;
JL_GC_PUSH2(&form, &result);
JL_TRY {
assert(iscons(ast) && car_(ast) == symbol(fl_ctx, "toplevel"));
ast = cdr_(ast);
while (iscons(ast)) {
expression = car_(ast);
{
JL_TIMING(LOWERING);
if (fl_ctx->T == fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "contains-macrocall")), expression)) {
form = scm_to_julia(fl_ctx, expression, inmodule);
form = jl_expand_macros(form, inmodule, NULL, 0);
expression = julia_to_scm(fl_ctx, form);
}
expression = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "jl-expand-to-thunk")), expression);
}
jl_get_ptls_states()->world_age = jl_world_counter;
form = scm_to_julia(fl_ctx, expression, inmodule);
JL_SIGATOMIC_END();
jl_get_ptls_states()->world_age = jl_world_counter;
if (jl_is_linenode(form))
jl_lineno = jl_linenode_line(form);
else
result = jl_toplevel_eval_flex(inmodule, form, 1, 1);
JL_SIGATOMIC_BEGIN();
ast = cdr_(ast);
}
}
JL_CATCH {
form = jl_pchar_to_string(fname, len);
result = jl_box_long(jl_lineno);
err = 1;
}
jl_get_ptls_states()->world_age = last_age;
jl_lineno = last_lineno;
jl_filename = last_filename;
fl_free_gc_handles(fl_ctx, 2);
ctx->module = old_module;
jl_ast_ctx_leave(ctx);
if (err) {
if (jl_loaderror_type == NULL)
jl_rethrow();
else
jl_rethrow_other(jl_new_struct(jl_loaderror_type, form, result,
ptls->exception_in_transit));
}
JL_GC_POP();
return result;
}
JL_DLLEXPORT jl_value_t *jl_load_file_string(const char *text, size_t len,
char *filename, jl_module_t *inmodule)
{
return jl_parse_eval_all(filename, text, len, inmodule);
}
// returns either an expression or a thunk
jl_value_t *jl_call_scm_on_ast(const char *funcname, jl_value_t *expr, jl_module_t *inmodule)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
JL_AST_PRESERVE_PUSH(ctx, old_roots, inmodule);
value_t arg = julia_to_scm(fl_ctx, expr);
value_t e = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, funcname)), arg);
jl_value_t *result = scm_to_julia(fl_ctx, e, inmodule);
JL_AST_PRESERVE_POP(ctx, old_roots);
jl_ast_ctx_leave(ctx);
return result;
}
// syntax tree accessors
JL_DLLEXPORT jl_value_t *jl_copy_ast(jl_value_t *expr)
{
if (expr && jl_is_expr(expr)) {
jl_expr_t *e = (jl_expr_t*)expr;
size_t i, l = jl_array_len(e->args);
jl_expr_t *ne = jl_exprn(e->head, l);
JL_GC_PUSH2(&ne, &expr);
for (i = 0; i < l; i++) {
jl_value_t *a = jl_exprarg(e, i);
jl_exprargset(ne, i, jl_copy_ast(a));
}
JL_GC_POP();
return (jl_value_t*)ne;
}
return expr;
}
JL_DLLEXPORT int jl_is_operator(char *sym)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
int res = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "operator?")), symbol(fl_ctx, sym)) == fl_ctx->T;
jl_ast_ctx_leave(ctx);
return res;
}
JL_DLLEXPORT int jl_is_unary_operator(char *sym)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
int res = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "unary-op?")), symbol(fl_ctx, sym)) == fl_ctx->T;
jl_ast_ctx_leave(ctx);
return res;
}
JL_DLLEXPORT int jl_is_unary_and_binary_operator(char *sym)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
int res = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "unary-and-binary-op?")), symbol(fl_ctx, sym)) == fl_ctx->T;
jl_ast_ctx_leave(ctx);
return res;
}
JL_DLLEXPORT int jl_operator_precedence(char *sym)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
int res = numval(fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "operator-precedence")), symbol(fl_ctx, sym)));
jl_ast_ctx_leave(ctx);
return res;
}
int jl_has_meta(jl_array_t *body, jl_sym_t *sym)
{
size_t i, l = jl_array_len(body);
for (i = 0; i < l; i++) {
jl_expr_t *stmt = (jl_expr_t*)jl_array_ptr_ref(body, i);
if (jl_is_expr((jl_value_t*)stmt) && stmt->head == meta_sym) {
size_t i, l = jl_array_len(stmt->args);
for (i = 0; i < l; i++)
if (jl_array_ptr_ref(stmt->args, i) == (jl_value_t*)sym)
return 1;
}
}
return 0;
}
static jl_value_t *jl_invoke_julia_macro(jl_array_t *args, jl_module_t *inmodule, jl_module_t **ctx)
{
jl_ptls_t ptls = jl_get_ptls_states();
JL_TIMING(MACRO_INVOCATION);
size_t nargs = jl_array_len(args) + 1;
JL_NARGSV("macrocall", 3); // macro name, location, and module
jl_value_t **margs;
JL_GC_PUSHARGS(margs, nargs);
int i;
margs[0] = jl_array_ptr_ref(args, 0);
// __source__ argument
jl_value_t *lno = jl_array_ptr_ref(args, 1);
margs[1] = lno;
if (!jl_typeis(lno, jl_linenumbernode_type)) {
margs[1] = jl_new_struct(jl_linenumbernode_type, jl_box_long(0), jl_nothing);
}
margs[2] = (jl_value_t*)inmodule;
for (i = 3; i < nargs; i++)
margs[i] = jl_array_ptr_ref(args, i - 1);
size_t last_age = ptls->world_age;
size_t world = jl_world_counter;
ptls->world_age = world;
jl_value_t *result;
JL_TRY {
margs[0] = jl_toplevel_eval(*ctx, margs[0]);
jl_method_instance_t *mfunc = jl_method_lookup(jl_gf_mtable(margs[0]), margs, nargs, 1, world);
if (mfunc == NULL) {
jl_method_error((jl_function_t*)margs[0], margs, nargs, world);
// unreachable
}
*ctx = mfunc->def.method->module;
result = jl_call_method_internal(mfunc, margs, nargs);
}
JL_CATCH {
if (jl_loaderror_type == NULL) {
jl_rethrow();
}
else {
jl_value_t *lno = margs[1];
jl_value_t *file = jl_fieldref(lno, 1);
if (jl_is_symbol(file))
margs[0] = jl_cstr_to_string(jl_symbol_name((jl_sym_t*)file));
else
margs[0] = jl_cstr_to_string("<macrocall>");