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Merge branch 'pfalcon-modure'

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Damien George 2014-10-11 18:55:44 +01:00
commit 37671c9a97
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241
extmod/modure.c Normal file
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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014 Paul Sokolovsky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <assert.h>
#include <string.h>
#include "mpconfig.h"
#include "nlr.h"
#include "misc.h"
#include "qstr.h"
#include "obj.h"
#include "runtime.h"
#include "binary.h"
#if MICROPY_PY_URE
#include "re1.5/regexp.h"
#define FLAG_DEBUG 0x1000
typedef struct _mp_obj_re_t {
mp_obj_base_t base;
ByteProg re;
} mp_obj_re_t;
typedef struct _mp_obj_match_t {
mp_obj_base_t base;
int num_matches;
mp_obj_t str;
const char *caps[0];
} mp_obj_match_t;
STATIC void match_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
mp_obj_match_t *self = self_in;
print(env, "<match num=%d @%p>", self->num_matches);
}
STATIC mp_obj_t match_group(mp_obj_t self_in, mp_obj_t no_in) {
mp_obj_match_t *self = self_in;
mp_int_t no = mp_obj_int_get(no_in);
if (no < 0 || no >= self->num_matches / 2) {
nlr_raise(mp_obj_new_exception_arg1(&mp_type_IndexError, no_in));
}
const char *start = self->caps[no * 2];
return mp_obj_new_str(start, self->caps[no * 2 + 1] - start, false);
}
MP_DEFINE_CONST_FUN_OBJ_2(match_group_obj, match_group);
STATIC const mp_map_elem_t match_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_group), (mp_obj_t) &match_group_obj },
};
STATIC MP_DEFINE_CONST_DICT(match_locals_dict, match_locals_dict_table);
STATIC const mp_obj_type_t match_type = {
{ &mp_type_type },
.name = MP_QSTR_match,
.print = match_print,
.locals_dict = (mp_obj_t)&match_locals_dict,
};
STATIC void re_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
mp_obj_re_t *self = self_in;
print(env, "<re %p>", self);
}
STATIC mp_obj_t re_exec(bool is_anchored, uint n_args, const mp_obj_t *args) {
mp_obj_re_t *self = args[0];
Subject subj;
mp_uint_t len;
subj.begin = mp_obj_str_get_data(args[1], &len);
subj.end = subj.begin + len;
int caps_num = (self->re.sub + 1) * 2;
mp_obj_match_t *match = m_new_obj_var(mp_obj_match_t, char*, caps_num);
int res = re1_5_recursiveloopprog(&self->re, &subj, match->caps, caps_num, is_anchored);
if (res == 0) {
m_del_var(mp_obj_match_t, char*, caps_num, match);
return mp_const_none;
}
match->base.type = &match_type;
match->num_matches = caps_num;
match->str = args[1];
return match;
}
STATIC mp_obj_t re_match(uint n_args, const mp_obj_t *args) {
return re_exec(true, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(re_match_obj, 2, 4, re_match);
STATIC mp_obj_t re_search(uint n_args, const mp_obj_t *args) {
return re_exec(false, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(re_search_obj, 2, 4, re_search);
STATIC mp_obj_t re_split(uint n_args, const mp_obj_t *args) {
mp_obj_re_t *self = args[0];
Subject subj;
mp_uint_t len;
subj.begin = mp_obj_str_get_data(args[1], &len);
subj.end = subj.begin + len;
int caps_num = (self->re.sub + 1) * 2;
int maxsplit = 0;
if (n_args > 2) {
maxsplit = mp_obj_int_get(args[2]);
}
mp_obj_t retval = mp_obj_new_list(0, NULL);
const char *caps[caps_num];
while (true) {
int res = re1_5_recursiveloopprog(&self->re, &subj, caps, caps_num, false);
// if we didn't have a match, or had an empty match, it's time to stop
if (!res || caps[0] == caps[1]) {
break;
}
mp_obj_t s = mp_obj_new_str(subj.begin, caps[0] - subj.begin, false);
mp_obj_list_append(retval, s);
if (self->re.sub > 0) {
mp_not_implemented("Splitting with sub-captures");
}
subj.begin = caps[1];
if (maxsplit > 0 && --maxsplit == 0) {
break;
}
}
mp_obj_t s = mp_obj_new_str(subj.begin, subj.end - subj.begin, false);
mp_obj_list_append(retval, s);
return retval;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(re_split_obj, 2, 3, re_split);
STATIC const mp_map_elem_t re_locals_dict_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR_match), (mp_obj_t) &re_match_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_search), (mp_obj_t) &re_search_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_split), (mp_obj_t) &re_split_obj },
};
STATIC MP_DEFINE_CONST_DICT(re_locals_dict, re_locals_dict_table);
STATIC const mp_obj_type_t re_type = {
{ &mp_type_type },
.name = MP_QSTR_ure,
.print = re_print,
.locals_dict = (mp_obj_t)&re_locals_dict,
};
mp_obj_t mod_re_compile(uint n_args, const mp_obj_t *args) {
const char *re_str = mp_obj_str_get_str(args[0]);
int size = re1_5_sizecode(re_str);
mp_obj_re_t *o = m_new_obj_var(mp_obj_re_t, char, size);
o->base.type = &re_type;
int flags = 0;
if (n_args > 1) {
flags = mp_obj_get_int(args[1]);
}
int error = re1_5_compilecode(&o->re, re_str);
if (error != 0) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "Error in regex"));
}
if (flags & FLAG_DEBUG) {
re1_5_dumpcode(&o->re);
}
return o;
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_compile_obj, 1, 2, mod_re_compile);
STATIC mp_obj_t mod_re_exec(bool is_anchored, uint n_args, const mp_obj_t *args) {
mp_obj_re_t *self = mod_re_compile(1, args);
const mp_obj_t args2[] = {self, args[1]};
mp_obj_match_t *match = re_exec(is_anchored, 2, args2);
return match;
}
STATIC mp_obj_t mod_re_match(uint n_args, const mp_obj_t *args) {
return mod_re_exec(true, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_match_obj, 2, 4, mod_re_match);
STATIC mp_obj_t mod_re_search(uint n_args, const mp_obj_t *args) {
return mod_re_exec(false, n_args, args);
}
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_search_obj, 2, 4, mod_re_search);
STATIC const mp_map_elem_t mp_module_re_globals_table[] = {
{ MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(MP_QSTR_ure) },
{ MP_OBJ_NEW_QSTR(MP_QSTR_compile), (mp_obj_t)&mod_re_compile_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_match), (mp_obj_t)&mod_re_match_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_search), (mp_obj_t)&mod_re_search_obj },
{ MP_OBJ_NEW_QSTR(MP_QSTR_DEBUG), MP_OBJ_NEW_SMALL_INT(FLAG_DEBUG) },
};
STATIC const mp_obj_dict_t mp_module_re_globals = {
.base = {&mp_type_dict},
.map = {
.all_keys_are_qstrs = 1,
.table_is_fixed_array = 1,
.used = MP_ARRAY_SIZE(mp_module_re_globals_table),
.alloc = MP_ARRAY_SIZE(mp_module_re_globals_table),
.table = (mp_map_elem_t*)mp_module_re_globals_table,
},
};
const mp_obj_module_t mp_module_ure = {
.base = { &mp_type_module },
.name = MP_QSTR_ure,
.globals = (mp_obj_dict_t*)&mp_module_re_globals,
};
#endif //MICROPY_PY_URE

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// Copyright 2014 Paul Sokolovsky.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "regexp.h"
static void insert_code(char *code, int at, int num, int *pc)
{
memmove(code + at + num, code + at, *pc - at);
*pc += num;
}
#define REL(at, to) (to - at - 2)
int re1_5_sizecode(const char *re)
{
int pc = 5 + NON_ANCHORED_PREFIX; // Save 0, Save 1, Match; more bytes for "search" (vs "match") prefix code
for (; *re; re++) {
switch (*re) {
case '\\':
re++;
default:
pc += 2;
break;
case '+':
// Skip entire "+?"
if (re[1] == '?')
re++;
case '?':
pc += 2;
break;
case '.':
case '^':
case '$':
pc++;
break;
case '*':
// Skip entire "*?"
if (re[1] == '?')
re++;
case '|':
case '(':
pc += 4;
break;
case ')':
break;
}
}
return pc;
}
#define EMIT(at, byte) code[at] = byte
const char *_compilecode(const char *re, ByteProg *prog)
{
char *code = prog->insts;
int pc = prog->bytelen;
int start = pc;
int term = pc;
int alt_label = 0;
for (; *re && *re != ')'; re++) {
switch (*re) {
case '\\':
re++;
default:
term = pc;
EMIT(pc++, Char);
EMIT(pc++, *re);
prog->len++;
break;
case '.':
term = pc;
EMIT(pc++, Any);
prog->len++;
break;
case '(':
term = pc;
EMIT(pc++, Save);
EMIT(pc++, 2 * ++prog->sub);
prog->len++;
prog->bytelen = pc;
re = _compilecode(re + 1, prog);
pc = prog->bytelen;
EMIT(pc++, Save);
EMIT(pc++, 2 * prog->sub + 1);
prog->len++;
break;
case '?':
insert_code(code, term, 2, &pc);
EMIT(term, Split);
EMIT(term + 1, REL(term, pc));
prog->len++;
break;
case '*':
insert_code(code, term, 2, &pc);
EMIT(pc, Jmp);
EMIT(pc + 1, REL(pc, term));
pc += 2;
if (re[1] == '?') {
EMIT(term, RSplit);
re++;
} else {
EMIT(term, Split);
}
EMIT(term + 1, REL(term, pc));
prog->len += 2;
break;
case '+':
if (re[1] == '?') {
EMIT(pc, Split);
re++;
} else {
EMIT(pc, RSplit);
}
EMIT(pc + 1, REL(pc, term));
pc += 2;
prog->len++;
break;
case '|':
if (alt_label) {
EMIT(alt_label, REL(alt_label, pc) + 1);
}
insert_code(code, start, 2, &pc);
EMIT(pc++, Jmp);
alt_label = pc++;
EMIT(start, Split);
EMIT(start + 1, REL(start, pc));
prog->len += 2;
break;
case '^':
EMIT(pc++, Bol);
prog->len++;
break;
case '$':
EMIT(pc++, Eol);
prog->len++;
break;
}
}
if (alt_label) {
EMIT(alt_label, REL(alt_label, pc) + 1);
}
prog->bytelen = pc;
return re;
}
int re1_5_compilecode(ByteProg *prog, const char *re)
{
prog->len = 0;
prog->bytelen = 0;
prog->sub = 0;
// Add code to implement non-anchored operation ("search"),
// for anchored operation ("match"), this code will be just skipped.
// TODO: Implement search in much more efficient manner
prog->insts[prog->bytelen++] = RSplit;
prog->insts[prog->bytelen++] = 3;
prog->insts[prog->bytelen++] = Any;
prog->insts[prog->bytelen++] = Jmp;
prog->insts[prog->bytelen++] = -5;
prog->len += 3;
prog->insts[prog->bytelen++] = Save;
prog->insts[prog->bytelen++] = 0;
prog->len++;
_compilecode(re, prog);
prog->insts[prog->bytelen++] = Save;
prog->insts[prog->bytelen++] = 1;
prog->len++;
prog->insts[prog->bytelen++] = Match;
prog->len++;
return 0;
}
void
cleanmarks(ByteProg *prog)
{
char *pc = prog->insts;
char *end = pc + prog->bytelen;
while (pc < end) {
*pc &= 0x7f;
switch (*pc) {
case Jmp:
case Split:
case RSplit:
case Save:
case Char:
pc++;
}
pc++;
}
}
#if 0
int main(int argc, char *argv[])
{
int pc = 0;
ByteProg *code = re1_5_compilecode(argv[1]);
re1_5_dumpcode(code);
}
#endif

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extmod/re1.5/dumpcode.c Normal file
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// Copyright 2014 Paul Sokolovsky.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "regexp.h"
void re1_5_dumpcode(ByteProg *prog)
{
int pc = 0;
char *code = prog->insts;
while (pc < prog->bytelen) {
printf("%2d: ", pc);
switch(code[pc++]) {
default:
assert(0);
// re1_5_fatal("printprog");
case Split:
printf("split %d (%d)\n", pc + (signed char)code[pc] + 1, (signed char)code[pc]);
pc++;
break;
case RSplit:
printf("rsplit %d (%d)\n", pc + (signed char)code[pc] + 1, (signed char)code[pc]);
pc++;
break;
case Jmp:
printf("jmp %d (%d)\n", pc + (signed char)code[pc] + 1, (signed char)code[pc]);
pc++;
break;
case Char:
printf("char %c\n", code[pc++]);
break;
case Any:
printf("any\n");
break;
case Match:
printf("match\n");
break;
case Save:
printf("save %d\n", (unsigned char)code[pc++]);
break;
case Bol:
printf("assert bol\n");
break;
case Eol:
printf("assert eol\n");
break;
}
}
printf("Bytes: %d, insts: %d\n", prog->bytelen, prog->len);
}

71
extmod/re1.5/recursiveloop.c Normal file
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// Copyright 2007-2009 Russ Cox. All Rights Reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include "regexp.h"
static int
recursiveloop(char *pc, const char *sp, Subject *input, const char **subp, int nsubp)
{
const char *old;
int off;
for(;;) {
if(inst_is_consumer(*pc)) {
// If we need to match a character, but there's none left, it's fail
if(sp >= input->end)
return 0;
}
switch(*pc++) {
case Char:
if(*sp != *pc++)
return 0;
case Any:
sp++;
continue;
case Match:
return 1;
case Jmp:
off = (signed char)*pc++;
pc = pc + off;
continue;
case Split:
off = (signed char)*pc++;
if(recursiveloop(pc, sp, input, subp, nsubp))
return 1;
pc = pc + off;
continue;
case RSplit:
off = (signed char)*pc++;
if(recursiveloop(pc + off, sp, input, subp, nsubp))
return 1;
continue;
case Save:
off = (unsigned char)*pc++;
if(off >= nsubp) {
continue;
}
old = subp[off];
subp[off] = sp;
if(recursiveloop(pc, sp, input, subp, nsubp))
return 1;
subp[off] = old;
return 0;
case Bol:
if(sp != input->begin)
return 0;
continue;
case Eol:
if(sp != input->end)
return 0;
continue;
}
re1_5_fatal("recursiveloop");
}
}
int
re1_5_recursiveloopprog(ByteProg *prog, Subject *input, const char **subp, int nsubp, int is_anchored)
{
return recursiveloop(HANDLE_ANCHORED(prog->insts, is_anchored), input->begin, input, subp, nsubp);
}

138
extmod/re1.5/regexp.h Normal file
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// Copyright 2007-2009 Russ Cox. All Rights Reserved.
// Copyright 2014 Paul Sokolovsky.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <assert.h>
#define nil ((void*)0)
#define nelem(x) (sizeof(x)/sizeof((x)[0]))
typedef struct Regexp Regexp;
typedef struct Prog Prog;
typedef struct ByteProg ByteProg;
typedef struct Inst Inst;
typedef struct Subject Subject;
struct Regexp
{
int type;
int n;
int ch;
Regexp *left;
Regexp *right;
};
enum /* Regexp.type */
{
Alt = 1,
Cat,
Lit,
Dot,
Paren,
Quest,
Star,
Plus,
};
Regexp *parse(char*);
Regexp *reg(int type, Regexp *left, Regexp *right);
void printre(Regexp*);
#ifndef re1_5_fatal
void re1_5_fatal(char*);
#endif
void *mal(int);
struct Prog
{
Inst *start;
int len;
};
struct ByteProg
{
int bytelen;
int len;
int sub;
char insts[0];
};
struct Inst
{
int opcode;
int c;
int n;
Inst *x;
Inst *y;
int gen; // global state, oooh!
};
enum /* Inst.opcode */
{
// Instructions which consume input bytes (and thus fail if none left)
CONSUMERS = 1,
Char = CONSUMERS,
Any,
ASSERTS = 0x50,
Bol = ASSERTS,
Eol,
// Instructions which take relative offset as arg
JUMPS = 0x60,
Jmp = JUMPS,
Split,
RSplit,
// Other (special) instructions
Save = 0x7e,
Match = 0x7f,
};
#define inst_is_consumer(inst) ((inst) < ASSERTS)
#define inst_is_jump(inst) ((inst) & 0x70 == JUMPS)
Prog *compile(Regexp*);
void printprog(Prog*);
extern int gen;
enum {
MAXSUB = 20
};
typedef struct Sub Sub;
struct Sub
{
int ref;
int nsub;
const char *sub[MAXSUB];
};
Sub *newsub(int n);
Sub *incref(Sub*);
Sub *copy(Sub*);
Sub *update(Sub*, int, const char*);
void decref(Sub*);
struct Subject {
const char *begin;
const char *end;
};
#define NON_ANCHORED_PREFIX 5
#define HANDLE_ANCHORED(bytecode, is_anchored) ((is_anchored) ? (bytecode) + NON_ANCHORED_PREFIX : (bytecode))
int re1_5_backtrack(ByteProg*, Subject*, const char**, int, int);
int re1_5_pikevm(ByteProg*, Subject*, const char**, int, int);
int re1_5_recursiveloopprog(ByteProg*, Subject*, const char**, int, int);
int re1_5_recursiveprog(ByteProg*, Subject*, const char**, int, int);
int re1_5_thompsonvm(ByteProg*, Subject*, const char**, int, int);
int re1_5_sizecode(const char *re);
int re1_5_compilecode(ByteProg *prog, const char *re);
void re1_5_dumpcode(ByteProg *prog);
void cleanmarks(ByteProg *prog);

1
py/builtin.h
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@ -90,3 +90,4 @@ extern struct _dummy_t mp_sys_stderr_obj;
extern const mp_obj_module_t mp_module_uctypes;
extern const mp_obj_module_t mp_module_zlibd;
extern const mp_obj_module_t mp_module_ujson;
extern const mp_obj_module_t mp_module_ure;

3
py/builtintables.c
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@ -209,6 +209,9 @@ STATIC const mp_map_elem_t mp_builtin_module_table[] = {
#if MICROPY_PY_UJSON
{ MP_OBJ_NEW_QSTR(MP_QSTR_ujson), (mp_obj_t)&mp_module_ujson },
#endif
#if MICROPY_PY_URE
{ MP_OBJ_NEW_QSTR(MP_QSTR_ure), (mp_obj_t)&mp_module_ure },
#endif
// extra builtin modules as defined by a port
MICROPY_PORT_BUILTIN_MODULES

4
py/mpconfig.h
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@ -394,6 +394,10 @@ typedef double mp_float_t;
#define MICROPY_PY_UJSON (0)
#endif
#ifndef MICROPY_PY_URE
#define MICROPY_PY_URE (0)
#endif
/*****************************************************************************/
/* Hooks for a port to add builtins */

7
py/py.mk
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@ -113,6 +113,10 @@ PY_O_BASENAME = \
../extmod/moductypes.o \
../extmod/modzlibd.o \
../extmod/modujson.o \
../extmod/modure.o \
../extmod/re1.5/compilecode.o \
../extmod/re1.5/dumpcode.o \
../extmod/re1.5/recursiveloop.o \
# prepend the build destination prefix to the py object files
PY_O = $(addprefix $(PY_BUILD)/, $(PY_O_BASENAME))
@ -166,3 +170,6 @@ $(PY_BUILD)/gc.o: CFLAGS += $(CSUPEROPT)
# optimising vm for speed, adds only a small amount to code size but makes a huge difference to speed (20% faster)
$(PY_BUILD)/vm.o: CFLAGS += $(CSUPEROPT)
# Additional options for 3rd-party libs
$(PY_BUILD)/../extmod/re1.5/recursiveloop.o: CFLAGS += "-Dre1_5_fatal(x)=assert(!x)"

9
py/qstrdefs.h
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@ -473,3 +473,12 @@ Q(ujson)
Q(dumps)
Q(loads)
#endif
#if MICROPY_PY_URE
Q(ure)
Q(compile)
Q(match)
Q(search)
Q(group)
Q(DEBUG)
#endif

1
stmhal/mpconfigport.h
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@ -58,6 +58,7 @@
#define MICROPY_PY_UCTYPES (1)
#define MICROPY_PY_ZLIBD (1)
#define MICROPY_PY_UJSON (1)
#define MICROPY_PY_URE (1)
#define MICROPY_ENABLE_EMERGENCY_EXCEPTION_BUF (1)
#define MICROPY_EMERGENCY_EXCEPTION_BUF_SIZE (0)

37
tests/extmod/ure1.py Normal file
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@ -0,0 +1,37 @@
try:
import ure as re
except ImportError:
import re
r = re.compile(".+")
m = r.match("abc")
print(m.group(0))
try:
m.group(1)
except IndexError:
print("IndexError")
r = re.compile("(.+)1")
m = r.match("xyz781")
print(m.group(0))
print(m.group(1))
try:
m.group(2)
except IndexError:
print("IndexError")
r = re.compile("o+")
m = r.search("foobar")
print(m.group(0))
try:
m.group(1)
except IndexError:
print("IndexError")
m = re.match(".*", "foo")
print(m.group(0))
m = re.search("w.r", "hello world")
print(m.group(0))

35
tests/extmod/ure_split.py Normal file
View File

@ -0,0 +1,35 @@
try:
import ure as re
except ImportError:
import re
r = re.compile(" ")
s = r.split("a b c foobar")
print(s)
r = re.compile(" +")
s = r.split("a b c foobar")
print(s)
r = re.compile(" +")
s = r.split("a b c foobar", 1)
print(s)
r = re.compile(" +")
s = r.split("a b c foobar", 2)
print(s)
r = re.compile(" *")
s = r.split("a b c foobar")
# TODO - no idea how this is supposed to work, per docs, empty match == stop
# splitting, so CPython code apparently does some dirty magic.
#print(s)
r = re.compile("x*")
s = r.split("foo")
print(s)
r = re.compile("[a-f]+")
s = r.split("0a3b9")
# TODO - char classes are not yet supported by re1.5
#print(s)

1
unix/mpconfigport.h
View File

@ -57,6 +57,7 @@
#define MICROPY_PY_UCTYPES (1)
#define MICROPY_PY_ZLIBD (1)
#define MICROPY_PY_UJSON (1)
#define MICROPY_PY_URE (1)
// Define to MICROPY_ERROR_REPORTING_DETAILED to get function, etc.
// names in exception messages (may require more RAM).