Commit Graph

22 Commits

Author SHA1 Message Date
Jim Mussared 692d36d779 py: Implement partial PEP-498 (f-string) support.
This implements (most of) the PEP-498 spec for f-strings and is based on
https://github.com/micropython/micropython/pull/4998 by @klardotsh.

It is implemented in the lexer as a syntax translation to `str.format`:
  f"{a}" --> "{}".format(a)

It also supports:
  f"{a=}" --> "a={}".format(a)

This is done by extracting the arguments into a temporary vstr buffer,
then after the string has been tokenized, the lexer input queue is saved
and the contents of the temporary vstr buffer are injected into the lexer
instead.

There are four main limitations:
- raw f-strings (`fr` or `rf` prefixes) are not supported and will raise
  `SyntaxError: raw f-strings are not supported`.

- literal concatenation of f-strings with adjacent strings will fail
    "{}" f"{a}" --> "{}{}".format(a)    (str.format will incorrectly use
                                         the braces from the non-f-string)
    f"{a}" f"{a}" --> "{}".format(a) "{}".format(a) (cannot concatenate)

- PEP-498 requires the full parser to understand the interpolated
  argument, however because this entirely runs in the lexer it cannot
  resolve nested braces in expressions like
    f"{'}'}"

- The !r, !s, and !a conversions are not supported.

Includes tests and cpydiffs.

Signed-off-by: Jim Mussared <jim.mussared@gmail.com>
2021-08-14 16:58:40 +10:00
Damien George 8459f538eb tests/feature_check: Check for lack of pass result rather than failure.
Commit cb68a5741a broke automatic Python
feature detection when running tests, because some detection relied on a
crash of a feature script returning exactly b"CRASH".

This commit fixes this and improves the situation by testing for the lack
of a known pass result, rather than an exact failure result.

Signed-off-by: Damien George <damien@micropython.org>
2021-04-15 00:52:56 +10:00
Damien George 6129b8e401 tests: Rename run-tests to run-tests.py for consistency.
Signed-off-by: Damien George <damien@micropython.org>
2021-03-12 19:56:09 +11:00
stijn 40ad8f1666 all: Rename "sys" module to "usys".
This is consistent with the other 'micro' modules and allows implementing
additional features in Python via e.g. micropython-lib's sys.

Note this is a breaking change (not backwards compatible) for ports which
do not enable weak links, as "import sys" must now be replaced with
"import usys".
2020-09-04 00:10:24 +10:00
David Lechner 3dc324d3f1 tests: Format all Python code with black, except tests in basics subdir.
This adds the Python files in the tests/ directory to be formatted with
./tools/codeformat.py.  The basics/ subdirectory is excluded for now so we
aren't changing too much at once.

In a few places `# fmt: off`/`# fmt: on` was used where the code had
special formatting for readability or where the test was actually testing
the specific formatting.
2020-03-30 13:21:58 +11:00
Yonatan Goldschmidt 853aaa06f2 lib/mp-readline: Add word-based move/delete EMACS key sequences.
This commit adds backward-word, backward-kill-word, forward-word,
forward-kill-word sequences for the REPL, with bindings to Alt+F, Alt+B,
Alt+D and Alt+Backspace respectively.  It is disabled by default and can be
enabled via MICROPY_REPL_EMACS_WORDS_MOVE.

Further enabling MICROPY_REPL_EMACS_EXTRA_WORDS_MOVE adds extra bindings
for these new sequences: Ctrl+Right, Ctrl+Left and Ctrl+W.

The features are enabled on unix micropython-coverage and micropython-dev.
2020-01-12 13:09:27 +11:00
Damien George 1d51115246 tests: Add feature check for uio module and skip corresponding tests. 2019-10-29 22:22:37 +11:00
Damien George ecb77e40e0 tests: Add feature check for slice and skip corresponding tests. 2019-10-29 22:22:37 +11:00
Damien George 6e9ba1cf4b tests: Add feature check for bytearray and skip corresponding tests. 2019-10-29 22:22:37 +11:00
Paul Sokolovsky d6f9d64d97 tests/class_reverse_op: Test for reverse arith ops special methods.
This test should be run only if support for reverse ops is enabled, so
the corresponding feature_check is added to run-tests.
2017-09-10 17:05:57 +03:00
Damien George 4a6c0fda78 tests: Auto detect floating point capabilites of the target.
The floating-point precision of the target is detected (0, 30, 32 or 64)
and only those tests which can run on the target will be run.
2017-06-26 13:47:00 +10:00
Paul Sokolovsky b099aeb3ca run-tests: Add feature check for "const" keyword and skip related tests. 2017-04-02 22:52:18 +03:00
Paul Sokolovsky 854bb322bf tests/feature_check/int_big: Rework "big int" detection.
MICROPY_LONGINT_IMPL_LONGLONG doesn't have overflow detection, so just
parsing a large number won't give an error, we need to print it out
to check that the whole number was parsed.
2017-03-10 02:11:43 +01:00
Paul Sokolovsky 89e570a5b4 tests/run-tests: Check for big int availability and skip related tests.
Big aka arbitrary-precision integers (implemented by MPZ module) are used
in tests starting with "int_big_" or ending with "_intbig".
2017-03-03 20:16:59 +03:00
Paul Sokolovsky ce2e0eeb7b tests/run-tests: Allow to skip tests using async/await keywords. 2017-02-14 22:03:25 +03:00
Paul Sokolovsky 26f00ff154 tests/run-tests: Allow to skip set tests.
If sets are not enabled, set literals lead to SyntaxError during parsing,
so it requires feature_check. Set tests are skipped based on set_*.py
pattern.
2017-01-05 00:16:29 +03:00
Damien George cdec7ba30e tests: Add a coverage test for printing the parse-tree. 2016-12-22 11:26:06 +11:00
Paul Sokolovsky cbc489dff5 tests: Actuall add feature check for complex type being available. 2015-12-06 15:13:26 +02:00
Damien George 3aa7dd23c9 unix: Add exit and paste-mode hints to shell startup banner.
Thanks to @nyov for the initial patch.
2015-10-12 00:19:00 +01:00
Damien George 0334058fa4 Rename "Micro Python" to "MicroPython" in REPL, help, readme's and misc. 2015-10-12 00:06:25 +01:00
Paul Sokolovsky a3fe307400 tests: Consolidate all feature check snippets under feature_check/. 2015-08-30 11:36:42 +03:00
Paul Sokolovsky 1a1b48e51a tests: Add feature_check dir to collect capability detection scripts.
Which are currently intermixed with real scripts and spread around various
dirs.
2015-08-30 11:11:18 +03:00