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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: http:https://julialang.org/license
/*
AST
interface to front-end, obtains and translates syntax trees
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#ifdef _OS_WINDOWS_
#include <malloc.h>
#endif
#include "julia.h"
#include "julia_internal.h"
#include "flisp.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
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 jlgensym_sym;
arraylist_t gensym_to_flisp;
jl_ast_context_list_t list;
int ref;
jl_task_t *task;
// use a pointer to a stack slot so that we can detect if
// `jl_ast_preserve` is called in the wrong context.
// If `roots` is not NULL, it always points to a rooted stack slot.
jl_array_t **roots;
} 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)
#define JL_AST_PRESERVE_PUSH(ctx, _roots, old_roots) \
jl_array_t *_roots = NULL; \
jl_array_t **old_roots = ctx->roots; \
ctx->roots = &_roots; \
JL_GC_PUSH1(&_roots)
#define JL_AST_PRESERVE_POP(ctx, old_roots) \
JL_GC_POP(); \
ctx->roots = old_roots
static void jl_ast_preserve(fl_context_t *fl_ctx, jl_value_t *obj)
{
jl_ast_context_t *ctx = jl_ast_ctx(fl_ctx);
assert(ctx->roots);
jl_array_t *roots = *ctx->roots;
if (!roots) {
roots = *ctx->roots = jl_alloc_cell_1d(1);
jl_cellset(roots, 0, obj);
}
else {
jl_cell_1d_push(roots, obj);
}
}
static jl_value_t *scm_to_julia(fl_context_t *fl_ctx, value_t e, int expronly);
static value_t julia_to_scm(fl_context_t *fl_ctx, jl_value_t *v);
value_t fl_defined_julia_global(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
// tells whether a var is defined in and *by* the current module
argcount(fl_ctx, "defined-julia-global", nargs, 1);
(void)tosymbol(fl_ctx, args[0], "defined-julia-global");
if (jl_current_module == NULL)
return fl_ctx->F;
jl_sym_t *var = jl_symbol(symbol_name(fl_ctx, args[0]));
jl_binding_t *b =
(jl_binding_t*)ptrhash_get(&jl_current_module->bindings, var);
return (b != HT_NOTFOUND && b->owner==jl_current_module) ? fl_ctx->T : fl_ctx->F;
}
value_t fl_current_julia_module(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
value_t opaque = cvalue(fl_ctx, jl_ast_ctx(fl_ctx)->jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = (jl_value_t*)jl_current_module;
return opaque;
}
value_t fl_current_module_counter(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
static uint32_t fallback_counter = 0;
if (jl_current_module == NULL)
return fixnum(++fallback_counter);
else
return fixnum(jl_module_next_counter(jl_current_module));
}
value_t fl_invoke_julia_macro(fl_context_t *fl_ctx, value_t *args, uint32_t nargs)
{
if (nargs < 1)
argcount(fl_ctx, "invoke-julia-macro", nargs, 1);
jl_value_t *f = NULL;
jl_value_t **margs;
// Reserve one more slot for the result
JL_GC_PUSHARGS(margs, nargs + 1);
int i;
for(i=1; i < nargs; i++) margs[i] = scm_to_julia(fl_ctx, args[i], 1);
jl_value_t *result = NULL;
JL_TRY {
margs[0] = scm_to_julia(fl_ctx, args[0], 1);
margs[0] = jl_toplevel_eval(margs[0]);
f = margs[0];
margs[nargs] = result = jl_apply_generic(margs, nargs);
}
JL_CATCH {
JL_GC_POP();
value_t opaque = cvalue(fl_ctx, jl_ast_ctx(fl_ctx)->jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = jl_exception_in_transit;
return fl_list2(fl_ctx, jl_ast_ctx(fl_ctx)->error_sym, opaque);
}
// protect result from GC, otherwise it could be freed during future
// macro expansions, since it will be referenced only from scheme and
// not julia.
// all calls to invoke-julia-macro happen under `jl_macroexpand`,
// `jl_expand` or `jl_parse_eval_all` so the preserved array is rooted there.
assert(result != NULL);
jl_ast_preserve(fl_ctx, result);
value_t scm = julia_to_scm(fl_ctx, result);
fl_gc_handle(fl_ctx, &scm);
value_t scmresult;
jl_module_t *defmod = jl_gf_mtable(f)->module;
if (defmod == NULL || defmod == jl_current_module) {
scmresult = fl_cons(fl_ctx, scm, fl_ctx->F);
}
else {
value_t opaque = cvalue(fl_ctx, jl_ast_ctx(fl_ctx)->jvtype, sizeof(void*));
*(jl_value_t**)cv_data((cvalue_t*)ptr(opaque)) = (jl_value_t*)defmod;
scmresult = fl_cons(fl_ctx, scm, opaque);
}
fl_free_gc_handles(fl_ctx, 1);
JL_GC_POP();
return scmresult;
}
static const builtinspec_t julia_flisp_ast_ext[] = {
{ "defined-julia-global", fl_defined_julia_global },
{ "invoke-julia-macro", fl_invoke_julia_macro },
{ "current-julia-module", fl_current_julia_module },
{ "current-julia-module-counter", fl_current_module_counter },
{ NULL, NULL }
};
static int jl_parse_deperror(fl_context_t *fl_ctx, int err);
static int jl_parse_depwarn_(fl_context_t *fl_ctx, int warn);
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_ctx(fl_ctx)->jvtype = define_opaque_type(fl_ctx->jl_sym, sizeof(void*), NULL, NULL);
assign_global_builtins(fl_ctx, julia_flisp_ast_ext);
jl_ast_ctx(fl_ctx)->true_sym = symbol(fl_ctx, "true");
jl_ast_ctx(fl_ctx)->false_sym = symbol(fl_ctx, "false");
jl_ast_ctx(fl_ctx)->error_sym = symbol(fl_ctx, "error");
jl_ast_ctx(fl_ctx)->null_sym = symbol(fl_ctx, "null");
jl_ast_ctx(fl_ctx)->jlgensym_sym = symbol(fl_ctx, "jlgensym");
// Enable / disable syntax deprecation warnings
// Disable in imaging mode to avoid i/o errors (#10727)
if (jl_generating_output())
jl_parse_depwarn_(fl_ctx, 0);
else if (jl_options.depwarn == JL_OPTIONS_DEPWARN_ERROR)
jl_parse_deperror(fl_ctx, 1);
else
jl_parse_depwarn_(fl_ctx, (int)jl_options.depwarn);
}
// There should be no GC allocation while holding this lock
JL_DEFINE_MUTEX(flisp)
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_LOCK_NOGC(flisp);
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 == jl_current_task) {
ctx->ref++;
JL_UNLOCK_NOGC(flisp);
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 = jl_current_task;
ctx->roots = NULL;
JL_UNLOCK_NOGC(flisp);
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->roots is NULL already due to calloc.
ctx->ref = 1;
ctx->task = jl_current_task;
node = &ctx->list;
jl_ast_context_list_insert(&jl_ast_ctx_using, node);
JL_UNLOCK_NOGC(flisp);
jl_init_ast_ctx(ctx);
return ctx;
}
static void jl_ast_ctx_leave(jl_ast_context_t *ctx)
{
if (--ctx->ref)
return;
JL_LOCK_NOGC(flisp);
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);
}
void jl_init_frontend(void)
{
if (jl_ast_ctx_using || jl_ast_ctx_freed)
return;
jl_ast_main_ctx.ref = 1;
jl_ast_main_ctx.task = jl_current_task;
jl_ast_context_list_insert(&jl_ast_ctx_using, &jl_ast_main_ctx.list);
jl_init_ast_ctx(&jl_ast_main_ctx);
jl_ast_ctx_leave(&jl_ast_main_ctx);
}
JL_DLLEXPORT void jl_lisp_prompt(void)
{
jl_init_frontend();
jl_ast_context_t *ctx = jl_ast_ctx_enter();
JL_AST_PRESERVE_PUSH(ctx, roots, old_roots);
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);
}
static jl_sym_t *scmsym_to_julia(fl_context_t *fl_ctx, value_t s)
{
assert(issymbol(s));
if (fl_isgensym(fl_ctx, s)) {
static 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, int expronly);
static jl_svec_t *full_svec(fl_context_t *fl_ctx, value_t e, int expronly)
{
size_t ln = llength(e);
if (ln == 0) return jl_emptysvec;
jl_svec_t *ar = jl_alloc_svec_uninit(ln);
JL_GC_PUSH1(&ar);
size_t i=0;
while (iscons(e)) {
jl_svecset(ar, i, scm_to_julia_(fl_ctx, car_(e), expronly));
e = cdr_(e);
i++;
}
JL_GC_POP();
return ar;
}
static jl_value_t *full_list(fl_context_t *fl_ctx, value_t e, int expronly)
{
size_t ln = llength(e);
if (ln == 0) return jl_an_empty_cell;
jl_array_t *ar = jl_alloc_cell_1d(ln);
JL_GC_PUSH1(&ar);
size_t i=0;
while (iscons(e)) {
jl_cellset(ar, i, scm_to_julia_(fl_ctx, car_(e), expronly));
e = cdr_(e);
i++;
}
JL_GC_POP();
return (jl_value_t*)ar;
}
static jl_value_t *full_list_of_lists(fl_context_t *fl_ctx, value_t e, int expronly)
{
size_t ln = llength(e);
if (ln == 0) return jl_an_empty_cell;
jl_array_t *ar = jl_alloc_cell_1d(ln);
JL_GC_PUSH1(&ar);
size_t i=0;
while (iscons(e)) {
jl_cellset(ar, i, full_list(fl_ctx, car_(e),expronly));
e = cdr_(e);
i++;
}
JL_GC_POP();
return (jl_value_t*)ar;
}
static jl_value_t *scm_to_julia(fl_context_t *fl_ctx, value_t e, int expronly)
{
jl_value_t *v = NULL;
JL_GC_PUSH1(&v);
JL_TRY {
v = scm_to_julia_(fl_ctx, e, expronly);
}
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_cellset(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, int eo)
{
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 (e == fl_ctx->F)
return jl_false;
if (e == fl_ctx->T)
return jl_true;
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)->jlgensym_sym) {
size_t genid = numval(car_(cdr_(e)));
return jl_box_gensym(genid);
}
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;
size_t i;
if (sym == lambda_sym) {
jl_expr_t *ex = jl_exprn(lambda_sym, n);
jl_svec_t *tvars = NULL;
jl_array_t *vinf = NULL;
jl_lambda_info_t *nli = NULL;
JL_GC_PUSH4(&ex, &tvars, &vinf, &nli);
e = cdr_(e);
value_t largs = car_(e);
jl_cellset(ex->args, 0, full_list(fl_ctx, largs, eo));
e = cdr_(e);
value_t ee = car_(e);
vinf = jl_alloc_cell_1d(3);
jl_cellset(vinf, 0, full_list_of_lists(fl_ctx, car_(ee), eo));
ee = cdr_(ee);
jl_cellset(vinf, 1, full_list_of_lists(fl_ctx, car_(ee), eo));
ee = cdr_(ee);
jl_cellset(vinf, 2, isfixnum(car_(ee)) ?
jl_box_long(numval(car_(ee))) :
full_list(fl_ctx,car_(ee),eo));
ee = cdr_(ee);
tvars = full_svec(fl_ctx, car_(ee), eo);
assert(!iscons(cdr_(ee)));
jl_cellset(ex->args, 1, vinf);
e = cdr_(e);
for(i=2; i < n; i++) {
assert(iscons(e));
jl_cellset(ex->args, i, scm_to_julia_(fl_ctx, car_(e), eo));
e = cdr_(e);
}
nli = jl_new_lambda_info((jl_value_t*)ex, tvars, jl_emptysvec, jl_current_module);
jl_preresolve_globals(nli->ast, nli);
JL_GC_POP();
return (jl_value_t*)nli;
}
if (issymbol(hd))
e = cdr_(e);
else
n++;
if (!eo) {
if (sym == line_sym && n==2) {
// NOTE: n==3 case exists: '(line, linenum, filename, funcname) passes
// the original name through to keyword-arg specializations.
// See 'line handling in julia-syntax.scm:keywords-method-def-expr
jl_value_t *filename = NULL, *linenum = NULL;
JL_GC_PUSH2(&filename, &linenum);
filename = scm_to_julia_(fl_ctx, car_(cdr_(e)), 0);
linenum = scm_to_julia_(fl_ctx, car_(e), 0);
jl_value_t *temp = jl_new_struct(jl_linenumbernode_type,
filename, linenum);
JL_GC_POP();
return temp;
}
jl_value_t *scmv = NULL, *temp = NULL;
JL_GC_PUSH1(&scmv);
if (sym == label_sym) {
scmv = scm_to_julia_(fl_ctx,car_(e),0);
temp = jl_new_struct(jl_labelnode_type, scmv);
JL_GC_POP();
return temp;
}
if (sym == goto_sym) {
scmv = scm_to_julia_(fl_ctx,car_(e),0);
temp = jl_new_struct(jl_gotonode_type, scmv);
JL_GC_POP();
return temp;
}
if (sym == inert_sym || (sym == quote_sym && (!iscons(car_(e))))) {
scmv = scm_to_julia_(fl_ctx,car_(e),0);
temp = jl_new_struct(jl_quotenode_type, scmv);
JL_GC_POP();
return temp;
}
if (sym == top_sym) {
scmv = scm_to_julia_(fl_ctx,car_(e),0);
temp = jl_new_struct(jl_topnode_type, scmv);
JL_GC_POP();
return temp;
}
if (sym == newvar_sym) {
scmv = scm_to_julia_(fl_ctx,car_(e),0);
temp = jl_new_struct(jl_newvarnode_type, scmv);
JL_GC_POP();
return temp;
}
JL_GC_POP();
}
else if (sym == inert_sym && !iscons(car_(e))) {
sym = quote_sym;
}
jl_expr_t *ex = jl_exprn(sym, n);
JL_GC_PUSH1(&ex);
// allocate a fresh args array for empty exprs passed to macros
if (eo && n == 0) {
ex->args = jl_alloc_cell_1d(0);
jl_gc_wb(ex, ex->args);
}
for(i=0; i < n; i++) {
assert(iscons(e));
jl_cellset(ex->args, i, scm_to_julia_(fl_ctx, car_(e), eo));
e = cdr_(e);
}
JL_GC_POP();
if (sym == list_sym)
return (jl_value_t*)ex->args;
return (jl_value_t*)ex;
}
if (iscprim(e) && cp_class((cprim_t*)ptr(e)) == fl_ctx->wchartype) {
return jl_box32(jl_char_type, *(int32_t*)cp_data((cprim_t*)ptr(e)));
}
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");
return jl_nothing;
}
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;
arraylist_t *jlgensym_to_flisp = &jl_ast_ctx(fl_ctx)->gensym_to_flisp;
if (jlgensym_to_flisp->len)
jlgensym_to_flisp->len = 0; // in case we didn't free it last time we got here (for example, if we threw an error)
else
arraylist_new(jlgensym_to_flisp, 0);
// 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_list2(fl_ctx, jl_ast_ctx(fl_ctx)->error_sym, cvalue_static_cstring(fl_ctx, "expression too large"));
}
arraylist_free(jlgensym_to_flisp);
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, fl_ctx->OutOfMemoryError, "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_cellref(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 (jl_is_symbol(v))
return symbol(fl_ctx, jl_symbol_name((jl_sym_t*)v));
if (jl_is_gensym(v)) {
size_t idx = ((jl_gensym_t*)v)->id;
size_t i;
arraylist_t *jlgensym_to_flisp = &jl_ast_ctx(fl_ctx)->gensym_to_flisp;
for (i = 0; i < jlgensym_to_flisp->len; i+=2) {
if ((ssize_t)jlgensym_to_flisp->items[i] == idx)
return fl_list2(fl_ctx, jl_ast_ctx(fl_ctx)->jlgensym_sym, fixnum((size_t)jlgensym_to_flisp->items[i+1]));
}
arraylist_push(jlgensym_to_flisp, (void*)idx);
value_t flv = fl_applyn(fl_ctx, 0, symbol_value(symbol(fl_ctx, "make-jlgensym")));
assert(iscons(flv) && car_(flv) == jl_ast_ctx(fl_ctx)->jlgensym_sym);
arraylist_push(jlgensym_to_flisp, (void*)(size_t)numval(car_(cdr_(flv))));
return flv;
}
if (v == jl_true)
return fl_ctx->T;
if (v == jl_false)
return fl_ctx->F;
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;
}
if (jl_typeis(v, jl_linenumbernode_type)) {
// GC Note: jl_fieldref(v, 1) allocates but neither jl_fieldref(v, 0)
// or julia_to_list2 should allocate here
value_t args = julia_to_list2(fl_ctx, jl_fieldref(v,1), jl_fieldref(v,0));
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;
}
// 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_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_topnode_type))
return julia_to_list2(fl_ctx, (jl_value_t*)top_sym, jl_fieldref(v,0));
if (jl_is_long(v) && fits_fixnum(jl_unbox_long(v)))
return fixnum(jl_unbox_long(v));
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)
{
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 e = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "jl-parse-string")), s);
jl_value_t *res = e == fl_ctx->FL_EOF ? jl_nothing : scm_to_julia(fl_ctx, e, 0);
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)
{
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, 0);
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, size_t len,
const char *content, size_t contentlen)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
value_t f, ast;
f = cvalue_static_cstring(fl_ctx, fname);
fl_gc_handle(fl_ctx, &f);
if (content != NULL) {
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 {
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);
int last_lineno = jl_lineno;
const char *last_filename = jl_filename;
jl_lineno = 0;
jl_filename = fname;
jl_array_t *roots = NULL;
jl_array_t **old_roots = ctx->roots;
ctx->roots = &roots;
jl_value_t *form=NULL, *result=jl_nothing;
int err = 0;
JL_GC_PUSH3(&roots, &form, &result);
JL_TRY {
assert(iscons(ast) && car_(ast) == symbol(fl_ctx,"toplevel"));
ast = cdr_(ast);
while (iscons(ast)) {
value_t expansion = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "jl-expand-to-thunk")), car_(ast));
form = scm_to_julia(fl_ctx, expansion, 0);
jl_sym_t *head = NULL;
if (jl_is_expr(form)) head = ((jl_expr_t*)form)->head;
if (head == jl_incomplete_sym)
jl_errorf("syntax: %s", jl_string_data(jl_exprarg(form,0)));
else if (head == error_sym)
jl_interpret_toplevel_expr(form);
else if (head == line_sym)
jl_lineno = jl_unbox_long(jl_exprarg(form,0));
else
result = jl_toplevel_eval_flex(form, 1);
ast = cdr_(ast);
}
}
JL_CATCH {
form = jl_pchar_to_string(fname, len);
result = jl_box_long(jl_lineno);
err = 1;
}
jl_lineno = last_lineno;
jl_filename = last_filename;
fl_free_gc_handles(fl_ctx, 1);
ctx->roots = old_roots;
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,
jl_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, size_t namelen)
{
return jl_parse_eval_all(filename, namelen, text, len);
}
JL_DLLEXPORT int jl_parse_depwarn(int warn)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
int res = jl_parse_depwarn_(&ctx->fl, warn);
jl_ast_ctx_leave(ctx);
return res;
}
static int jl_parse_depwarn_(fl_context_t *fl_ctx, int warn)
{
value_t prev = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "jl-parser-depwarn")),
warn ? fl_ctx->T : fl_ctx->F);
return prev == fl_ctx->T ? 1 : 0;
}
static int jl_parse_deperror(fl_context_t *fl_ctx, int err)
{
value_t prev = fl_applyn(fl_ctx, 1, symbol_value(symbol(fl_ctx, "jl-parser-deperror")),
err ? fl_ctx->T : fl_ctx->F);
return prev == fl_ctx->T ? 1 : 0;
}
// returns either an expression or a thunk
jl_value_t *jl_call_scm_on_ast(char *funcname, jl_value_t *expr)
{
jl_ast_context_t *ctx = jl_ast_ctx_enter();
fl_context_t *fl_ctx = &ctx->fl;
JL_AST_PRESERVE_PUSH(ctx, roots, old_roots);
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, 0);
JL_AST_PRESERVE_POP(ctx, old_roots);
jl_ast_ctx_leave(ctx);
return result;
}
JL_DLLEXPORT jl_value_t *jl_expand(jl_value_t *expr)
{
return jl_call_scm_on_ast("jl-expand-to-thunk", expr);
}
JL_DLLEXPORT jl_value_t *jl_macroexpand(jl_value_t *expr)
{
return jl_call_scm_on_ast("jl-macroexpand", expr);
}
ssize_t jl_max_jlgensym_in(jl_value_t *v)
{
ssize_t genid = -1;
if (jl_is_gensym(v)) {
genid = ((jl_gensym_t*)v)->id;
}
else if (jl_is_expr(v)) {
jl_expr_t *e = (jl_expr_t*)v;
size_t i, l = jl_array_len(e->args);
for (i = 0; i < l; i++) {
ssize_t maxid = jl_max_jlgensym_in(jl_exprarg(e, i));
if (maxid > genid)
genid = maxid;
}
}
return genid;
}
// wrap expr in a thunk AST
jl_lambda_info_t *jl_wrap_expr(jl_value_t *expr)
{
// `(lambda () (() () () ()) ,expr)
jl_expr_t *le=NULL, *bo=NULL; jl_value_t *vi=NULL;
jl_value_t *mt = jl_an_empty_cell;
JL_GC_PUSH3(&le, &vi, &bo);
le = jl_exprn(lambda_sym, 3);
jl_cellset(le->args, 0, mt);
vi = (jl_value_t*)jl_alloc_cell_1d(3);
jl_cellset(vi, 0, mt);
jl_cellset(vi, 1, mt);
jl_cellset(vi, 2, jl_box_long(jl_max_jlgensym_in(expr)+1));
jl_cellset(le->args, 1, vi);
if (!jl_is_expr(expr) || ((jl_expr_t*)expr)->head != body_sym) {
bo = jl_exprn(body_sym, 1);
jl_cellset(bo->args, 0, (jl_value_t*)jl_exprn(return_sym, 1));
jl_cellset(((jl_expr_t*)jl_exprarg(bo,0))->args, 0, expr);
expr = (jl_value_t*)bo;
}
jl_cellset(le->args, 2, expr);
jl_lambda_info_t *li = jl_new_lambda_info((jl_value_t*)le, jl_emptysvec, jl_emptysvec, jl_current_module);
JL_GC_POP();
return li;
}
// syntax tree accessors
// get array of formal argument expressions
jl_array_t *jl_lam_args(jl_expr_t *l)
{
assert(jl_is_expr(l));
assert(l->head == lambda_sym);
jl_value_t *ae = jl_exprarg(l,0);
assert(jl_is_array(ae));
return (jl_array_t*)ae;
}
jl_sym_t *jl_lam_argname(jl_lambda_info_t *li, int i)
{
jl_expr_t *ast;
if (jl_is_expr(li->ast))
ast = (jl_expr_t*)li->ast;
else
ast = (jl_expr_t*)jl_uncompress_ast(li, li->ast);
// NOTE (gc root): `ast` is not rooted here, but jl_lam_args and jl_cellref
// do not allocate.
return (jl_sym_t*)jl_cellref(jl_lam_args(ast),i);
}
// get array of var info records (for args and locals)
jl_array_t *jl_lam_vinfo(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *le = jl_exprarg(l, 1);
assert(jl_is_array(le));
jl_value_t *ll = jl_cellref(le, 0);
assert(jl_is_array(ll));
return (jl_array_t*)ll;
}
// get array of types for GenSym vars, or its length (if not type-inferred)
jl_value_t *jl_lam_gensyms(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *le = jl_exprarg(l, 1);
assert(jl_is_array(le));
assert(jl_array_len(le) == 3);
return jl_cellref(le, 2);
}
// get array of body forms
jl_expr_t *jl_lam_body(jl_expr_t *l)
{
assert(jl_is_expr(l));
jl_value_t *be = jl_exprarg(l, 2);
assert(jl_is_expr(be));
assert(((jl_expr_t*)be)->head == body_sym);
return (jl_expr_t*)be;
}
jl_sym_t *jl_decl_var(jl_value_t *ex)
{
if (jl_is_symbol(ex)) return (jl_sym_t*)ex;
assert(jl_is_expr(ex));
return (jl_sym_t*)jl_exprarg(ex, 0);
}
JL_DLLEXPORT int jl_is_rest_arg(jl_value_t *ex)
{
if (!jl_is_expr(ex)) return 0;
if (((jl_expr_t*)ex)->head != colons_sym) return 0;
jl_expr_t *atype = (jl_expr_t*)jl_exprarg(ex,1);
if (!jl_is_expr(atype)) return 0;
if (((jl_expr_t*)atype)->head == dots_sym)
return 1;
if (atype->head != call_sym || jl_array_len(atype->args) < 3 || jl_array_len(atype->args) > 4)
return 0;
return ((jl_sym_t*)jl_exprarg(atype,1)) == vararg_sym;
}
JL_DLLEXPORT jl_value_t *jl_copy_ast(jl_value_t *expr)
{
if (expr == NULL) {
return NULL;
}
else if (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 = NULL;
JL_GC_PUSH2(&ne, &expr);
ne = jl_exprn(e->head, l);
if (l == 0) {
ne->args = jl_alloc_cell_1d(0);
jl_gc_wb(ne, ne->args);
}
else {
for(i=0; i < l; i++) {
jl_exprargset(ne, i, jl_copy_ast(jl_exprarg(e,i)));
}
}
JL_GC_POP();