W3SLAV/micropython
1
Fork 0
mirror of https://github.com/W3SLAV/micropython.git synced 2025-06-19 03:55:44 -04:00
Code Issues Actions Packages Projects Releases Wiki Activity

py/lexer: Support raw f-strings.

Browse Source 
Support for raw str/bytes already exists, and extending that to raw
f-strings is easy.  It also reduces code size because it eliminates an
error message.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George 2024-06-06 17:31:19 +10:00
parent a066f2308f
commit 3c8089d1b1
6 changed files with 13 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
py/lexer.c
View File

@ -661,21 +661,19 @@ void mp_lexer_to_next(mp_lexer_t *lex) {
}
#if MICROPY_PY_FSTRINGS
if (is_char_following(lex, 'f')) {
// raw-f-strings unsupported, immediately return (invalid) token.
lex->tok_kind = MP_TOKEN_FSTRING_RAW;
break;
is_fstring = true;
n_char = 2;
}
#endif
}
#if MICROPY_PY_FSTRINGS
else if (is_char(lex, 'f')) {
if (is_char_following(lex, 'r')) {
// raw-f-strings unsupported, immediately return (invalid) token.
lex->tok_kind = MP_TOKEN_FSTRING_RAW;
break;
}
n_char = 1;
is_fstring = true;
n_char = 1;
if (is_char_following(lex, 'r')) {
is_raw = true;
n_char = 2;
}
}
#endif

1
py/lexer.h
View File

@ -46,7 +46,6 @@ typedef enum _mp_token_kind_t {
MP_TOKEN_LONELY_STRING_OPEN,
#if MICROPY_PY_FSTRINGS
MP_TOKEN_MALFORMED_FSTRING,
MP_TOKEN_FSTRING_RAW,
#endif
MP_TOKEN_NEWLINE,

3
py/parse.c
View File

@ -1351,9 +1351,6 @@ mp_parse_tree_t mp_parse(mp_lexer_t *lex, mp_parse_input_kind_t input_kind) {
} else if (lex->tok_kind == MP_TOKEN_MALFORMED_FSTRING) {
exc = mp_obj_new_exception_msg(&mp_type_SyntaxError,
MP_ERROR_TEXT("malformed f-string"));
} else if (lex->tok_kind == MP_TOKEN_FSTRING_RAW) {
exc = mp_obj_new_exception_msg(&mp_type_SyntaxError,
MP_ERROR_TEXT("raw f-strings are not supported"));
#endif
} else {
exc = mp_obj_new_exception_msg(&mp_type_SyntaxError,

4
tests/basics/string_fstring.py
View File

@ -75,3 +75,7 @@ print(
f"cd---------------------------------"
f"e{y}f---------------------------------"
)
# Raw f-strings.
print(rf"\r\a\w {'f'} \s\t\r\i\n\g")
print(fr"\r{x}")

4
tests/cmdline/cmd_parsetree.py.exp
View File

@ -1,6 +1,6 @@
----------------
[ 1] file_input_2(1) (n=10)
tok(6)
tok(5)
[ 4] \(rule\|for_stmt\)(22) (n=4)
id(i)
[ 4] \(rule\|atom_paren\)(45) (n=1)
@ -9,7 +9,7 @@
NULL
[ 6] \(rule\|expr_stmt\)(5) (n=2)
id(a)
tok(16)
tok(15)
[ 7] \(rule\|expr_stmt\)(5) (n=2)
id(b)
str(str)

8
tests/cpydiff/core_fstring_raw.py
View File

@ -1,8 +0,0 @@
"""
categories: Core
description: Raw f-strings are not supported
cause: MicroPython is optimised for code space.
workaround: Unknown
"""
rf"hello"