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| author | Nick Coghlan <ncoghlan@gmail.com> | 2007-04-15 12:05:43 (GMT) |
|---|---|---|
| committer | Nick Coghlan <ncoghlan@gmail.com> | 2007-04-15 12:05:43 (GMT) |
| commit | 650f0d06d3574f843f52edd1126ddd9ebd6fac7d (patch) | |
| tree | 9116cebfb4031d0ac3b2db7dc0e8c85d82751e59 /Grammar | |
| parent | 6ef6306dd62aa092539298ed69c7c6ffff568e2d (diff) | |
| download | cpython-650f0d06d3574f843f52edd1126ddd9ebd6fac7d.zip cpython-650f0d06d3574f843f52edd1126ddd9ebd6fac7d.tar.gz cpython-650f0d06d3574f843f52edd1126ddd9ebd6fac7d.tar.bz2 | |
Hide list comp variables and support set comprehensions
Diffstat (limited to 'Grammar')
| -rw-r--r-- | Grammar/Grammar | 37 |
1 files changed, 13 insertions, 24 deletions
diff --git a/Grammar/Grammar b/Grammar/Grammar index 41d8be8..0e49e35 100644 --- a/Grammar/Grammar +++ b/Grammar/Grammar @@ -82,16 +82,10 @@ with_var: 'as' expr except_clause: 'except' [test ['as' NAME]] suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT -# Backward compatibility cruft to support: -# [ x for x in lambda: True, lambda: False if x() ] -# even while also allowing: -# lambda x: 5 if x else 2 -# (But not a mix of the two) -testlist_safe: old_test [(',' old_test)+ [',']] -old_test: or_test | old_lambdef -old_lambdef: 'lambda' [varargslist] ':' old_test - test: or_test ['if' or_test 'else' test] | lambdef +test_nocond: or_test | lambdef_nocond +lambdef: 'lambda' [varargslist] ':' test +lambdef_nocond: 'lambda' [varargslist] ':' test_nocond or_test: and_test ('or' and_test)* and_test: not_test ('and' not_test)* not_test: 'not' not_test | comparison @@ -105,33 +99,28 @@ arith_expr: term (('+'|'-') term)* term: factor (('*'|'/'|'%'|'//') factor)* factor: ('+'|'-'|'~') factor | power power: atom trailer* ['**' factor] -atom: ('(' [yield_expr|testlist_gexp] ')' | - '[' [listmaker] ']' | - '{' [dictsetmaker] '}' | +atom: ('(' [yield_expr|testlist_comp] ')' | + '[' [testlist_comp] ']' | + '{' [dictorsetmaker] '}' | NAME | NUMBER | STRING+ | '...') -listmaker: test ( list_for | (',' test)* [','] ) -testlist_gexp: test ( gen_for | (',' test)* [','] ) -lambdef: 'lambda' [varargslist] ':' test +testlist_comp: test ( comp_for | (',' test)* [','] ) trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME subscriptlist: subscript (',' subscript)* [','] subscript: test | [test] ':' [test] [sliceop] sliceop: ':' [test] exprlist: expr (',' expr)* [','] testlist: test (',' test)* [','] -dictsetmaker: (test ':' test (',' test ':' test)* [',']) | (test (',' test)* [',']) +dictorsetmaker: ( (test ':' test (',' test ':' test)* [',']) | + (test (comp_for | (',' test)* [','])) ) classdef: 'class' NAME ['(' [arglist] ')'] ':' suite arglist: (argument ',')* (argument [',']| '*' test [',' '**' test] | '**' test) -argument: test [gen_for] | test '=' test # Really [keyword '='] test - -list_iter: list_for | list_if -list_for: 'for' exprlist 'in' testlist_safe [list_iter] -list_if: 'if' old_test [list_iter] +argument: test [comp_for] | test '=' test # Really [keyword '='] test -gen_iter: gen_for | gen_if -gen_for: 'for' exprlist 'in' or_test [gen_iter] -gen_if: 'if' old_test [gen_iter] +comp_iter: comp_for | comp_if +comp_for: 'for' exprlist 'in' or_test [comp_iter] +comp_if: 'if' test_nocond [comp_iter] testlist1: test (',' test)* |