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py/persistentcode: Remove unicode feature flag from .mpy file.

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Prior to this commit, even with unicode disabled .py and .mpy files could
contain unicode characters, eg by entering them directly in a string as
utf-8 encoded.

The only thing the compiler disallowed (with unicode disabled) was using
\uxxxx and \Uxxxxxxxx notation to specify a character within a string with
value >= 0x100; that would give a SyntaxError.

With this change mpy-cross will now accept \u and \U notation to insert a
character with value >= 0x100 into a string (because the -mno-unicode
option is now gone, there's no way to forbid this).  The runtime will
happily work with strings with such characters, just like it already works
with strings with characters that were utf-8 encoded directly.

This change simplifies things because there are no longer any feature
flags in .mpy files, and any bytecode .mpy will now run on any target.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2022-05-16 19:20:52 +10:00
parent b295b6f1f3
commit c49d5207e9
8 changed files with 35 additions and 56 deletions
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6
mpy-cross/main.c
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@@ -108,7 +108,6 @@ STATIC int usage(char **argv) {
"\n"
"Target specific options:\n"
"-msmall-int-bits=number : set the maximum bits used to encode a small-int\n"
"-mno-unicode : don't support unicode in compiled strings\n"
"-march=<arch> : set architecture for native emitter; x86, x64, armv6, armv7m, armv7em, armv7emsp, armv7emdp, xtensa, xtensawin\n"
"\n"
"Implementation specific options:\n", argv[0]
@@ -203,7 +202,6 @@ MP_NOINLINE int main_(int argc, char **argv) {
// set default compiler configuration
mp_dynamic_compiler.small_int_bits = 31;
mp_dynamic_compiler.py_builtins_str_unicode = 1;
#if defined(__i386__)
mp_dynamic_compiler.native_arch = MP_NATIVE_ARCH_X86;
mp_dynamic_compiler.nlr_buf_num_regs = MICROPY_NLR_NUM_REGS_X86;
@@ -261,10 +259,6 @@ MP_NOINLINE int main_(int argc, char **argv) {
return usage(argv);
}
// TODO check that small_int_bits is within range of host's capabilities
} else if (strcmp(argv[a], "-mno-unicode") == 0) {
mp_dynamic_compiler.py_builtins_str_unicode = 0;
} else if (strcmp(argv[a], "-municode") == 0) {
mp_dynamic_compiler.py_builtins_str_unicode = 1;
} else if (strncmp(argv[a], "-march=", sizeof("-march=") - 1) == 0) {
const char *arch = argv[a] + sizeof("-march=") - 1;
if (strcmp(arch, "x86") == 0) {