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| author | Benjamin Peterson <benjamin@python.org> | 2009-09-27 02:43:28 (GMT) |
|---|---|---|
| committer | Benjamin Peterson <benjamin@python.org> | 2009-09-27 02:43:28 (GMT) |
| commit | 4905e80c3d2f6abb613d212f0313d1dfe09475dc (patch) | |
| tree | df849b7313a57c1d844567bcd45b32f7e89ac0ca /Grammar | |
| parent | 10430ad7aace46c93939341817b97df48951d5a2 (diff) | |
| download | cpython-4905e80c3d2f6abb613d212f0313d1dfe09475dc.zip cpython-4905e80c3d2f6abb613d212f0313d1dfe09475dc.tar.gz cpython-4905e80c3d2f6abb613d212f0313d1dfe09475dc.tar.bz2 | |
fix an ambiguity in the grammar from the implementation of extended unpacking
(one which was strangely "resolved" by pgen)
This also kills the unused testlist1 rule and fixes parse tree validation of
extended unpacking.
Diffstat (limited to 'Grammar')
| -rw-r--r-- | Grammar/Grammar | 15 |
1 files changed, 7 insertions, 8 deletions
diff --git a/Grammar/Grammar b/Grammar/Grammar index 1f226b8..19f67de 100644 --- a/Grammar/Grammar +++ b/Grammar/Grammar @@ -37,8 +37,9 @@ stmt: simple_stmt | compound_stmt simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE small_stmt: (expr_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt | nonlocal_stmt | assert_stmt) -expr_stmt: testlist (augassign (yield_expr|testlist) | - ('=' (yield_expr|testlist))*) +expr_stmt: testlist_star_expr (augassign (yield_expr|testlist) | + ('=' (yield_expr|testlist_star_expr))*) +testlist_star_expr: (test|star_expr) (',' (test|star_expr))* [','] augassign: ('+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' | '<<=' | '>>=' | '**=' | '//=') # For normal assignments, additional restrictions enforced by the interpreter @@ -86,9 +87,9 @@ 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 -comparison: star_expr (comp_op star_expr)* +comparison: expr (comp_op expr)* comp_op: '<'|'>'|'=='|'>='|'<='|'<>'|'!='|'in'|'not' 'in'|'is'|'is' 'not' -star_expr: ['*'] expr +star_expr: '*' expr expr: xor_expr ('|' xor_expr)* xor_expr: and_expr ('^' and_expr)* and_expr: shift_expr ('&' shift_expr)* @@ -101,12 +102,12 @@ atom: ('(' [yield_expr|testlist_comp] ')' | '[' [testlist_comp] ']' | '{' [dictorsetmaker] '}' | NAME | NUMBER | STRING+ | '...' | 'None' | 'True' | 'False') -testlist_comp: test ( comp_for | (',' test)* [','] ) +testlist_comp: (test|star_expr) ( comp_for | (',' (test|star_expr))* [','] ) trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME subscriptlist: subscript (',' subscript)* [','] subscript: test | [test] ':' [test] [sliceop] sliceop: ':' [test] -exprlist: star_expr (',' star_expr)* [','] +exprlist: (expr|star_expr) (',' (expr|star_expr))* [','] testlist: test (',' test)* [','] dictorsetmaker: ( (test ':' test (comp_for | (',' test ':' test)* [','])) | (test (comp_for | (',' test)* [','])) ) @@ -123,8 +124,6 @@ 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)* - # not used in grammar, but may appear in "node" passed from Parser to Compiler encoding_decl: NAME |