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| author | Benjamin Peterson <benjamin@python.org> | 2009-09-27 02:43:28 +0000 |
|---|---|---|
| committer | Benjamin Peterson <benjamin@python.org> | 2009-09-27 02:43:28 +0000 |
| commit | 4905e80c3d2f6abb613d212f0313d1dfe09475dc (patch) | |
| tree | df849b7313a57c1d844567bcd45b32f7e89ac0ca /Grammar | |
| parent | 10430ad7aace46c93939341817b97df48951d5a2 (diff) | |
| download | cpython-git-4905e80c3d2f6abb613d212f0313d1dfe09475dc.tar.gz | |
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 1f226b80b1..19f67dee5e 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 |