diff options
| author | Damien George <damien@micropython.org> | 2020-06-16 21:42:44 +1000 |
|---|---|---|
| committer | Damien George <damien@micropython.org> | 2020-06-16 22:02:24 +1000 |
| commit | 178395031157f61af5426add2de1d76d91440b21 (patch) | |
| tree | 4f4898ff7f2e707e5b5e4a7245422b07689fb338 /py/lexer.c | |
| parent | 0fd91e39b1711772c88cfe4e0aaf817fe3387ba6 (diff) | |
py/compile: Implement PEP 572, assignment expressions with := operator.
The syntax matches CPython and the semantics are equivalent except that,
unlike CPython, MicroPython allows using := to assign to comprehension
iteration variables, because disallowing this would take a lot of code to
check for it.
The new compile-time option MICROPY_PY_ASSIGN_EXPR selects this feature and
is enabled by default, following MICROPY_PY_ASYNC_AWAIT.
Diffstat (limited to 'py/lexer.c')
| -rw-r--r-- | py/lexer.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/py/lexer.c b/py/lexer.c index 10bb999af..7d2a251d4 100644 --- a/py/lexer.c +++ b/py/lexer.c @@ -174,7 +174,8 @@ STATIC void indent_pop(mp_lexer_t *lex) { // this means if the start of two ops are the same then they are equal til the last char STATIC const char *const tok_enc = - "()[]{},:;~" // singles + "()[]{},;~" // singles + ":e=" // : := "<e=c<e=" // < <= << <<= ">e=c>e=" // > >= >> >>= "*e=c*e=" // * *= ** **= @@ -194,8 +195,9 @@ STATIC const uint8_t tok_enc_kind[] = { MP_TOKEN_DEL_PAREN_OPEN, MP_TOKEN_DEL_PAREN_CLOSE, MP_TOKEN_DEL_BRACKET_OPEN, MP_TOKEN_DEL_BRACKET_CLOSE, MP_TOKEN_DEL_BRACE_OPEN, MP_TOKEN_DEL_BRACE_CLOSE, - MP_TOKEN_DEL_COMMA, MP_TOKEN_DEL_COLON, MP_TOKEN_DEL_SEMICOLON, MP_TOKEN_OP_TILDE, + MP_TOKEN_DEL_COMMA, MP_TOKEN_DEL_SEMICOLON, MP_TOKEN_OP_TILDE, + MP_TOKEN_DEL_COLON, MP_TOKEN_OP_ASSIGN, MP_TOKEN_OP_LESS, MP_TOKEN_OP_LESS_EQUAL, MP_TOKEN_OP_DBL_LESS, MP_TOKEN_DEL_DBL_LESS_EQUAL, MP_TOKEN_OP_MORE, MP_TOKEN_OP_MORE_EQUAL, MP_TOKEN_OP_DBL_MORE, MP_TOKEN_DEL_DBL_MORE_EQUAL, MP_TOKEN_OP_STAR, MP_TOKEN_DEL_STAR_EQUAL, MP_TOKEN_OP_DBL_STAR, MP_TOKEN_DEL_DBL_STAR_EQUAL, |