bpo-40334: Refactor lambda_parameters similar to parameters by gvanrossum · Pull Request #19830 · python/cpython
kwds[arg_ty]: | '**' a=param_no_default { a } kwds[arg_ty]: '**' a=param_no_default { a }
# One parameter. This *includes* a following comma and type comment. #
lambdef[expr_ty]: | 'lambda' a=[lambda_parameters] ':' b=expression { _Py_Lambda((a) ? a : CHECK(_PyPegen_empty_arguments(p)), b, EXTRA) }
# lambda_parameters etc. duplicates parameters but without annotations # or type comments, and if there's no comma after a parameter, we expect # a colon, not a close parenthesis. (For more, see parameters above.) # lambda_parameters[arguments_ty]: | a=lambda_slash_without_default b=[',' x=lambda_plain_names { x }] c=[',' y=lambda_names_with_default { y }] d=[',' z=[lambda_star_etc] { z }] { | a=lambda_slash_no_default b=lambda_param_no_default* c=lambda_param_with_default* d=[lambda_star_etc] { _PyPegen_make_arguments(p, a, NULL, b, c, d) } | a=lambda_slash_with_default b=[',' y=lambda_names_with_default { y }] c=[',' z=[lambda_star_etc] { z }] { | a=lambda_slash_with_default b=lambda_param_with_default* c=[lambda_star_etc] { _PyPegen_make_arguments(p, NULL, a, NULL, b, c) } | a=lambda_plain_names b=[',' y=lambda_names_with_default { y }] c=[',' z=[lambda_star_etc] { z }] { | a=lambda_param_no_default+ b=lambda_param_with_default* c=[lambda_star_etc] { _PyPegen_make_arguments(p, NULL, NULL, a, b, c) } | a=lambda_names_with_default b=[',' z=[lambda_star_etc] { z }] { _PyPegen_make_arguments(p, NULL, NULL, NULL, a, b)} | a=lambda_param_with_default+ b=[lambda_star_etc] { _PyPegen_make_arguments(p, NULL, NULL, NULL, a, b)} | a=lambda_star_etc { _PyPegen_make_arguments(p, NULL, NULL, NULL, NULL, a) } lambda_slash_without_default[asdl_seq*]: a=lambda_plain_names ',' '/' { a } lambda_slash_with_default[SlashWithDefault*]: a=[n=lambda_plain_names ',' { n }] b=lambda_names_with_default ',' '/' { _PyPegen_slash_with_default(p, a, b) }
lambda_slash_no_default[asdl_seq*]: | a=lambda_param_no_default+ '/' ',' { a } | a=lambda_param_no_default+ '/' &':' { a } lambda_slash_with_default[SlashWithDefault*]: | a=lambda_param_no_default* b=lambda_param_with_default+ '/' ',' { _PyPegen_slash_with_default(p, a, b) } | a=lambda_param_no_default* b=lambda_param_with_default+ '/' &':' { _PyPegen_slash_with_default(p, a, b) }
lambda_star_etc[StarEtc*]: | '*' a=lambda_plain_name b=lambda_name_with_optional_default* c=[',' d=lambda_kwds { d }] [','] { | '*' a=lambda_param_no_default b=lambda_param_maybe_default* c=[lambda_kwds] { _PyPegen_star_etc(p, a, b, c) } | '*' b=lambda_name_with_optional_default+ c=[',' d=lambda_kwds { d }] [','] { | '*' ',' b=lambda_param_maybe_default+ c=[lambda_kwds] { _PyPegen_star_etc(p, NULL, b, c) } | a=lambda_kwds [','] { _PyPegen_star_etc(p, NULL, NULL, a) } lambda_name_with_optional_default[NameDefaultPair*]: | ',' a=lambda_plain_name b=['=' e=expression { e }] { _PyPegen_name_default_pair(p, a, b, NULL) } lambda_names_with_default[asdl_seq*]: a=','.lambda_name_with_default+ { a } lambda_name_with_default[NameDefaultPair*]: | n=lambda_plain_name '=' e=expression { _PyPegen_name_default_pair(p, n, e, NULL) } lambda_plain_names[asdl_seq*]: a=','.(lambda_plain_name !'=')+ { a } lambda_plain_name[arg_ty]: a=NAME { _Py_arg(a->v.Name.id, NULL, NULL, EXTRA) } lambda_kwds[arg_ty]: '**' a=lambda_plain_name { a } | a=lambda_kwds { _PyPegen_star_etc(p, NULL, NULL, a) }
lambda_kwds[arg_ty]: '**' a=lambda_param_no_default { a }
lambda_param_no_default[arg_ty]: | a=lambda_param ',' { a } | a=lambda_param &':' { a } lambda_param_with_default[NameDefaultPair*]: | a=lambda_param c=default ',' { _PyPegen_name_default_pair(p, a, c, NULL) } | a=lambda_param c=default &':' { _PyPegen_name_default_pair(p, a, c, NULL) } lambda_param_maybe_default[NameDefaultPair*]: | a=lambda_param c=default? ',' { _PyPegen_name_default_pair(p, a, c, NULL) } | a=lambda_param c=default? &':' { _PyPegen_name_default_pair(p, a, c, NULL) } lambda_param[arg_ty]: a=NAME { _Py_arg(a->v.Name.id, NULL, NULL, EXTRA) }
disjunction[expr_ty] (memo): | a=conjunction b=('or' c=conjunction { c })+ { _Py_BoolOp(