[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH v5 16/36] qapi/common.py: Convert comments into docstrings, a
From: |
Markus Armbruster |
Subject: |
Re: [PATCH v5 16/36] qapi/common.py: Convert comments into docstrings, and elaborate |
Date: |
Wed, 07 Oct 2020 11:14:00 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.1 (gnu/linux) |
John Snow <jsnow@redhat.com> writes:
> As docstrings, they'll show up in documentation and IDE help.
>
> The docstring style being targeted is the Sphinx documentation
> style. Sphinx uses an extension of ReST with "domains". We use the
> (implicit) Python domain, which supports a number of custom "info
> fields". Those info fields are documented here:
> https://www.sphinx-doc.org/en/master/usage/restructuredtext/domains.html#info-field-lists
>
> Primarily, we use `:param X: descr`, `:return[s]: descr`, and `:raise[s]
> Z: when`. Everything else is the Sphinx dialect of ReST.
>
> (No, nothing checks or enforces this style that I am aware of. Sphinx
> either chokes or succeeds, but does not enforce a standard of what is
> otherwise inside the docstring. Pycharm does highlight when your param
> fields are not aligned with the actual fields present. It does not
> highlight missing return or exception statements. There is no existing
> style guide I am aware of that covers a standard for a minimally
> acceptable docstring. I am debating writing one.)
>
> Signed-off-by: John Snow <jsnow@redhat.com>
> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
> Reviewed-by: Cleber Rosa <crosa@redhat.com>
> ---
> scripts/qapi/common.py | 53 +++++++++++++++++++++++++++++++-----------
> 1 file changed, 39 insertions(+), 14 deletions(-)
>
> diff --git a/scripts/qapi/common.py b/scripts/qapi/common.py
> index 74a2c001ed9..0ef38ea5fe0 100644
> --- a/scripts/qapi/common.py
> +++ b/scripts/qapi/common.py
> @@ -15,15 +15,24 @@
> from typing import Optional, Sequence
>
>
> +#: Sentinel value that causes all space to its right to be removed.
What's the purpose of : after # ?
I'm not sure this is a "sentinel value". Wikipedia:
In computer programming, a sentinel value (also referred to as a
flag value, trip value, rogue value, signal value, or dummy data)[1]
is a special value in the context of an algorithm which uses its
presence as a condition of termination, typically in a loop or
recursive algorithm.
https://en.wikipedia.org/wiki/Sentinel_value
Perhaps
# Magic string value that gets removed along with all space to the
# right.
> EATSPACE = '\033EATSPACE.'
> POINTER_SUFFIX = ' *' + EATSPACE
> _C_NAME_TRANS = str.maketrans('.-', '__')
>
>
> -# ENUMName -> ENUM_NAME, EnumName1 -> ENUM_NAME1
> -# ENUM_NAME -> ENUM_NAME, ENUM_NAME1 -> ENUM_NAME1, ENUM_Name2 -> ENUM_NAME2
> -# ENUM24_Name -> ENUM24_NAME
> def camel_to_upper(value: str) -> str:
> + """
> + Converts CamelCase to CAMEL_CASE.
> +
> + Examples:
> + ENUMName -> ENUM_NAME
> + EnumName1 -> ENUM_NAME1
> + ENUM_NAME -> ENUM_NAME
> + ENUM_NAME1 -> ENUM_NAME1
> + ENUM_Name2 -> ENUM_NAME2
> + ENUM24_Name -> ENUM24_NAME
> + """
I wonder whether these indented lines get wrapped into one
unintelligible parapgraph.
Have you eyeballed the output of Sphinx?
> c_fun_str = c_name(value, False)
> if value.isupper():
> return c_fun_str
> @@ -45,21 +54,33 @@ def camel_to_upper(value: str) -> str:
> def c_enum_const(type_name: str,
> const_name: str,
> prefix: Optional[str] = None) -> str:
> + """
> + Generate a C enumeration constant name.
> +
> + :param type_name: The name of the enumeration.
> + :param const_name: The name of this constant.
> + :param prefix: Optional, prefix that overrides the type_name.
> + """
> if prefix is not None:
> type_name = prefix
> return camel_to_upper(type_name) + '_' + c_name(const_name,
> False).upper()
>
>
> -# Map @name to a valid C identifier.
> -# If @protect, avoid returning certain ticklish identifiers (like
> -# C keywords) by prepending 'q_'.
> -#
> -# Used for converting 'name' from a 'name':'type' qapi definition
> -# into a generated struct member, as well as converting type names
> -# into substrings of a generated C function name.
> -# '__a.b_c' -> '__a_b_c', 'x-foo' -> 'x_foo'
> -# protect=True: 'int' -> 'q_int'; protect=False: 'int' -> 'int'
> def c_name(name: str, protect: bool = True) -> str:
> + """
> + Map ``name`` to a valid C identifier.
> +
> + Used for converting 'name' from a 'name':'type' qapi definition
> + into a generated struct member, as well as converting type names
> + into substrings of a generated C function name.
> +
> + '__a.b_c' -> '__a_b_c', 'x-foo' -> 'x_foo'
> + protect=True: 'int' -> 'q_int'; protect=False: 'int' -> 'int'
> +
> + :param name: The name to map.
> + :param protect: If true, avoid returning certain ticklish identifiers
> + (like C keywords) by prepending ``q_``.
> + """
> # ANSI X3J11/88-090, 3.1.1
> c89_words = set(['auto', 'break', 'case', 'char', 'const', 'continue',
> 'default', 'do', 'double', 'else', 'enum', 'extern',
> @@ -129,12 +150,16 @@ def decrease(self, amount: int = 4) -> None:
> self._level -= amount
>
>
> +#: Global, current indent level for code generation.
> indent = Indentation()
>
>
> -# Generate @code with @kwds interpolated.
> -# Obey indent, and strip EATSPACE.
> def cgen(code: str, **kwds: object) -> str:
> + """
> + Generate ``code`` with ``kwds`` interpolated.
> +
> + Obey `indent`, and strip `EATSPACE`.
> + """
> raw = code % kwds
> if indent:
> raw = re.sub(r'^(?!(#|$))', str(indent), raw, flags=re.MULTILINE)
- Re: [PATCH v5 11/36] qapi/common.py: Add indent manager, (continued)
[PATCH v5 12/36] qapi/common.py: delint with pylint, John Snow, 2020/10/05
[PATCH v5 13/36] qapi/common.py: Replace one-letter 'c' variable, John Snow, 2020/10/05
[PATCH v5 14/36] qapi/common.py: check with pylint, John Snow, 2020/10/05
[PATCH v5 15/36] qapi/common.py: add type hint annotations, John Snow, 2020/10/05
[PATCH v5 16/36] qapi/common.py: Convert comments into docstrings, and elaborate, John Snow, 2020/10/05
- Re: [PATCH v5 16/36] qapi/common.py: Convert comments into docstrings, and elaborate,
Markus Armbruster <=
[PATCH v5 17/36] qapi/common.py: move build_params into gen.py, John Snow, 2020/10/05
[PATCH v5 18/36] qapi: establish mypy type-checking baseline, John Snow, 2020/10/05