Guys, is it really worth saving a few hits on the auto-complete key
by adding even more mysterious twists to the existing Python function
call syntax ?
The current version already strikes me as way too complex.
It's by far the most complex piece of grammar we have in Python:
funcdef: 'def' NAME parameters ['->' test] ':' [TYPE_COMMENT]
func_body_suite
parameters: '(' [typedargslist] ')'
# The following definition for typedarglist is equivalent to this set of
rules:
#
# arguments = argument (',' [TYPE_COMMENT] argument)*
# argument = tfpdef ['=' test]
# kwargs = '**' tfpdef [','] [TYPE_COMMENT]
# args = '*' [tfpdef]
# kwonly_kwargs = (',' [TYPE_COMMENT] argument)* (TYPE_COMMENT |
[',' [TYPE_COMMENT] [kwargs]])
# args_kwonly_kwargs = args kwonly_kwargs | kwargs
# poskeyword_args_kwonly_kwargs = arguments ( TYPE_COMMENT | [','
[TYPE_COMMENT] [args_kwonly_kwargs]])
# typedargslist_no_posonly = poskeyword_args_kwonly_kwargs |
args_kwonly_kwargs
# typedarglist = (arguments ',' [TYPE_COMMENT] '/' [','
[[TYPE_COMMENT] typedargslist_no_posonly]])|(typedargslist_no_posonly)"
#
# It needs to be fully expanded to allow our LL(1) parser to work on it.
typedargslist: (
(tfpdef ['=' test] (',' [TYPE_COMMENT] tfpdef ['=' test])* ','
[TYPE_COMMENT] '/' [',' [ [TYPE_COMMENT] tfpdef ['=' test] (
',' [TYPE_COMMENT] tfpdef ['=' test])* (TYPE_COMMENT | [','
[TYPE_COMMENT] [
'*' [tfpdef] (',' [TYPE_COMMENT] tfpdef ['=' test])*
(TYPE_COMMENT | [',' [TYPE_COMMENT] ['**' tfpdef [','] [TYPE_COMMENT]]])
| '**' tfpdef [','] [TYPE_COMMENT]]])
| '*' [tfpdef] (',' [TYPE_COMMENT] tfpdef ['=' test])* (TYPE_COMMENT |
[',' [TYPE_COMMENT] ['**' tfpdef [','] [TYPE_COMMENT]]])
| '**' tfpdef [','] [TYPE_COMMENT]]] )
| (tfpdef ['=' test] (',' [TYPE_COMMENT] tfpdef ['=' test])*
(TYPE_COMMENT | [',' [TYPE_COMMENT] [
'*' [tfpdef] (',' [TYPE_COMMENT] tfpdef ['=' test])* (TYPE_COMMENT |
[',' [TYPE_COMMENT] ['**' tfpdef [','] [TYPE_COMMENT]]])
| '**' tfpdef [','] [TYPE_COMMENT]]])
| '*' [tfpdef] (',' [TYPE_COMMENT] tfpdef ['=' test])* (TYPE_COMMENT |
[',' [TYPE_COMMENT] ['**' tfpdef [','] [TYPE_COMMENT]]])
| '**' tfpdef [','] [TYPE_COMMENT])
)
tfpdef: NAME [':' test]
# The following definition for varargslist is equivalent to this set of
rules:
#
# arguments = argument (',' argument )*
# argument = vfpdef ['=' test]
# kwargs = '**' vfpdef [',']
# args = '*' [vfpdef]
# kwonly_kwargs = (',' argument )* [',' [kwargs]]
# args_kwonly_kwargs = args kwonly_kwargs | kwargs
# poskeyword_args_kwonly_kwargs = arguments [',' [args_kwonly_kwargs]]
# vararglist_no_posonly = poskeyword_args_kwonly_kwargs |
args_kwonly_kwargs
# varargslist = arguments ',' '/' [','[(vararglist_no_posonly)]] |
(vararglist_no_posonly)
#
# It needs to be fully expanded to allow our LL(1) parser to work on it.
varargslist: vfpdef ['=' test ](',' vfpdef ['=' test])* ',' '/' [',' [
(vfpdef ['=' test] (',' vfpdef ['=' test])* [',' [
'*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
| '**' vfpdef [',']]]
| '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
| '**' vfpdef [',']) ]] | (vfpdef ['=' test] (',' vfpdef ['=' test])*
[',' [
'*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
| '**' vfpdef [',']]]
| '*' [vfpdef] (',' vfpdef ['=' test])* [',' ['**' vfpdef [',']]]
| '**' vfpdef [',']
)
vfpdef: NAME
(https://docs.python.org/3/reference/grammar.html)
Today's editors have no problem finding the currently used local
variables and adding a key binding to turn a list of variables
a, b, c into a=a, b=b, c=c is certainly possible for those who
believe that auto-complete is not fast enough.
Explicit is better than implicit, remember ?!
--
Marc-Andre Lemburg
eGenix.com
Professional Python Services directly from the Experts (#1, Apr 20 2020)
>>> Python Projects, Coaching and Support ... https://www.egenix.com/
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