| # Simplified grammar for Python |
| |
| @bytecode True |
| @trailer ''' |
| void * |
| _PyPegen_parse(Parser *p) |
| { |
| // Initialize keywords |
| p->keywords = reserved_keywords; |
| p->n_keyword_lists = n_keyword_lists; |
| |
| // Run parser |
| void *result = NULL; |
| if (p->start_rule == Py_file_input) { |
| result = file_rule(p); |
| } else if (p->start_rule == Py_single_input) { |
| result = interactive_rule(p); |
| } else if (p->start_rule == Py_eval_input) { |
| result = eval_rule(p); |
| } else if (p->start_rule == Py_fstring_input) { |
| result = fstring_rule(p); |
| } |
| |
| return result; |
| } |
| |
| // The end |
| ''' |
| file[mod_ty]: a=[statements] ENDMARKER { Module(a, NULL, p->arena) } |
| interactive[mod_ty]: a=statement_newline { Interactive(a, p->arena) } |
| eval[mod_ty]: a=expressions NEWLINE* ENDMARKER { Expression(a, p->arena) } |
| fstring[expr_ty]: star_expressions |
| |
| statements[asdl_seq*]: a=statement+ { _PyPegen_seq_flatten(p, a) } |
| statement[asdl_seq*]: a=compound_stmt { _PyPegen_singleton_seq(p, a) } | simple_stmt |
| statement_newline[asdl_seq*]: |
| | a=compound_stmt NEWLINE { _PyPegen_singleton_seq(p, a) } |
| | simple_stmt |
| | NEWLINE { _PyPegen_singleton_seq(p, CHECK(_Py_Pass(EXTRA))) } |
| | ENDMARKER { _PyPegen_interactive_exit(p) } |
| simple_stmt[asdl_seq*]: |
| | a=small_stmt !';' NEWLINE { _PyPegen_singleton_seq(p, a) } # Not needed, there for speedup |
| | a=';'.small_stmt+ [';'] NEWLINE { a } |
| # NOTE: assignment MUST precede expression, else parsing a simple assignment |
| # will throw a SyntaxError. |
| small_stmt[stmt_ty] (memo): |
| | assignment |
| | e=star_expressions { _Py_Expr(e, EXTRA) } |
| | &'return' return_stmt |
| | &('import' | 'from') import_stmt |
| | &'raise' raise_stmt |
| | 'pass' { _Py_Pass(EXTRA) } |
| | &'del' del_stmt |
| | &'yield' yield_stmt |
| | &'assert' assert_stmt |
| | 'break' { _Py_Break(EXTRA) } |
| | 'continue' { _Py_Continue(EXTRA) } |
| | &'global' global_stmt |
| | &'nonlocal' nonlocal_stmt |
| compound_stmt[stmt_ty]: |
| | &('def' | '@' | ASYNC) function_def |
| | &'if' if_stmt |
| | &('class' | '@') class_def |
| | &('with' | ASYNC) with_stmt |
| | &('for' | ASYNC) for_stmt |
| | &'try' try_stmt |
| | &'while' while_stmt |
| |
| # NOTE: annotated_rhs may start with 'yield'; yield_expr must start with 'yield' |
| assignment: |
| | a=NAME ':' b=expression c=['=' d=annotated_rhs { d }] { |
| _Py_AnnAssign(CHECK(_PyPegen_set_expr_context(p, a, Store)), b, c, 1, EXTRA) } |
| | a=('(' b=inside_paren_ann_assign_target ')' { b } |
| | ann_assign_subscript_attribute_target) ':' b=expression c=['=' d=annotated_rhs { d }] { |
| _Py_AnnAssign(a, b, c, 0, EXTRA)} |
| | a=(z=star_targets '=' { z })+ b=(yield_expr | star_expressions) { |
| _Py_Assign(a, b, NULL, EXTRA) } |
| | a=target b=augassign c=(yield_expr | star_expressions) { |
| _Py_AugAssign(a, b->kind, c, EXTRA) } |
| | invalid_assignment |
| |
| augassign[AugOperator*]: |
| | '+=' {_PyPegen_augoperator(p, Add)} |
| | '-=' {_PyPegen_augoperator(p, Sub)} |
| | '*=' {_PyPegen_augoperator(p, Mult)} |
| | '@=' {_PyPegen_augoperator(p, MatMult)} |
| | '/=' {_PyPegen_augoperator(p, Div)} |
| | '%=' {_PyPegen_augoperator(p, Mod)} |
| | '&=' {_PyPegen_augoperator(p, BitAnd)} |
| | '|=' {_PyPegen_augoperator(p, BitOr)} |
| | '^=' {_PyPegen_augoperator(p, BitXor)} |
| | '<<=' {_PyPegen_augoperator(p, LShift)} |
| | '>>=' {_PyPegen_augoperator(p, RShift)} |
| | '**=' {_PyPegen_augoperator(p, Pow)} |
| | '//=' {_PyPegen_augoperator(p, FloorDiv)} |
| |
| global_stmt[stmt_ty]: 'global' a=','.NAME+ { |
| _Py_Global(CHECK(_PyPegen_map_names_to_ids(p, a)), EXTRA) } |
| nonlocal_stmt[stmt_ty]: 'nonlocal' a=','.NAME+ { |
| _Py_Nonlocal(CHECK(_PyPegen_map_names_to_ids(p, a)), EXTRA) } |
| |
| yield_stmt[stmt_ty]: y=yield_expr { _Py_Expr(y, EXTRA) } |
| |
| assert_stmt[stmt_ty]: 'assert' a=expression b=[',' z=expression { z }] { _Py_Assert(a, b, EXTRA) } |
| |
| del_stmt[stmt_ty]: 'del' a=del_targets { _Py_Delete(a, EXTRA) } |
| |
| import_stmt[stmt_ty]: import_name | import_from |
| import_name[stmt_ty]: 'import' a=dotted_as_names { _Py_Import(a, EXTRA) } |
| # note below: the ('.' | '...') is necessary because '...' is tokenized as ELLIPSIS |
| import_from[stmt_ty]: |
| | 'from' a=('.' | '...')* b=dotted_name 'import' c=import_from_targets { |
| _Py_ImportFrom(b->v.Name.id, c, _PyPegen_seq_count_dots(a), EXTRA) } |
| | 'from' a=('.' | '...')+ 'import' b=import_from_targets { |
| _Py_ImportFrom(NULL, b, _PyPegen_seq_count_dots(a), EXTRA) } |
| import_from_targets[asdl_seq*]: |
| | '(' a=import_from_as_names [','] ')' { a } |
| | import_from_as_names |
| | '*' { _PyPegen_singleton_seq(p, CHECK(_PyPegen_alias_for_star(p))) } |
| import_from_as_names[asdl_seq*]: |
| | a=','.import_from_as_name+ { a } |
| import_from_as_name[alias_ty]: |
| | a=NAME b=['as' z=NAME { z }] { _Py_alias(a->v.Name.id, |
| (b) ? ((expr_ty) b)->v.Name.id : NULL, |
| p->arena) } |
| dotted_as_names[asdl_seq*]: |
| | a=','.dotted_as_name+ { a } |
| dotted_as_name[alias_ty]: |
| | a=dotted_name b=['as' z=NAME { z }] { _Py_alias(a->v.Name.id, |
| (b) ? ((expr_ty) b)->v.Name.id : NULL, |
| p->arena) } |
| dotted_name[expr_ty]: |
| | a=dotted_name '.' b=NAME { _PyPegen_join_names_with_dot(p, a, b) } |
| | NAME |
| |
| if_stmt[stmt_ty]: |
| | 'if' a=named_expression ':' b=block c=elif_stmt { _Py_If(a, b, CHECK(_PyPegen_singleton_seq(p, c)), EXTRA) } |
| | 'if' a=named_expression ':' b=block c=[else_block] { _Py_If(a, b, c, EXTRA) } |
| elif_stmt[stmt_ty]: |
| | 'elif' a=named_expression ':' b=block c=elif_stmt { _Py_If(a, b, CHECK(_PyPegen_singleton_seq(p, c)), EXTRA) } |
| | 'elif' a=named_expression ':' b=block c=[else_block] { _Py_If(a, b, c, EXTRA) } |
| else_block[asdl_seq*]: 'else' ':' b=block { b } |
| |
| while_stmt[stmt_ty]: |
| | 'while' a=named_expression ':' b=block c=[else_block] { _Py_While(a, b, c, EXTRA) } |
| |
| for_stmt[stmt_ty]: |
| | is_async=[ASYNC] 'for' t=star_targets 'in' ex=star_expressions ':' b=block el=[else_block] { |
| (is_async ? _Py_AsyncFor : _Py_For)(t, ex, b, el, NULL, EXTRA) } |
| |
| with_stmt[stmt_ty]: |
| | is_async=[ASYNC] 'with' '(' a=','.with_item+ ')' ':' b=block { |
| (is_async ? _Py_AsyncWith : _Py_With)(a, b, NULL, EXTRA) } |
| | is_async=[ASYNC] 'with' a=','.with_item+ ':' b=block { |
| (is_async ? _Py_AsyncWith : _Py_With)(a, b, NULL, EXTRA) } |
| with_item[withitem_ty]: |
| | e=expression o=['as' t=target { t }] { _Py_withitem(e, o, p->arena) } |
| |
| try_stmt[stmt_ty]: |
| | 'try' ':' b=block f=finally_block { _Py_Try(b, NULL, NULL, f, EXTRA) } |
| | 'try' ':' b=block ex=except_block+ el=[else_block] f=[finally_block] { _Py_Try(b, ex, el, f, EXTRA) } |
| except_block[excepthandler_ty]: |
| | 'except' e=expression t=['as' z=target { z }] ':' b=block { |
| _Py_ExceptHandler(e, (t) ? ((expr_ty) t)->v.Name.id : NULL, b, EXTRA) } |
| | 'except' ':' b=block { _Py_ExceptHandler(NULL, NULL, b, EXTRA) } |
| finally_block[asdl_seq*]: 'finally' ':' a=block { a } |
| |
| return_stmt[stmt_ty]: |
| | 'return' a=[star_expressions] { _Py_Return(a, EXTRA) } |
| |
| raise_stmt[stmt_ty]: |
| | 'raise' a=expression b=['from' z=expression { z }] { _Py_Raise(a, b, EXTRA) } |
| | 'raise' { _Py_Raise(NULL, NULL, EXTRA) } |
| |
| function_def[stmt_ty]: |
| | d=decorators f=function_def_raw { _PyPegen_function_def_decorators(p, d, f) } |
| | function_def_raw |
| |
| function_def_raw[stmt_ty]: |
| | is_async=[ASYNC] 'def' n=NAME '(' params=[params] ')' a=['->' z=annotation { z }] ':' b=block { |
| (is_async ? _Py_AsyncFunctionDef : _Py_FunctionDef)(n->v.Name.id, |
| (params) ? params : CHECK(_PyPegen_empty_arguments(p)), |
| b, NULL, a, NULL, EXTRA) } |
| |
| params[arguments_ty]: |
| | invalid_parameters |
| | parameters |
| parameters[arguments_ty]: |
| | a=slash_without_default b=[',' x=plain_names { x }] c=[',' y=names_with_default { y }] d=[',' z=[star_etc] { z }] { |
| _PyPegen_make_arguments(p, a, NULL, b, c, d) } |
| | a=slash_with_default b=[',' y=names_with_default { y }] c=[',' z=[star_etc] { z }] { |
| _PyPegen_make_arguments(p, NULL, a, NULL, b, c) } |
| | a=plain_names b=[',' y=names_with_default { y }] c=[',' z=[star_etc] { z }] { |
| _PyPegen_make_arguments(p, NULL, NULL, a, b, c) } |
| | a=names_with_default b=[',' z=[star_etc] { z }] { _PyPegen_make_arguments(p, NULL, NULL, NULL, a, b)} |
| | a=star_etc { _PyPegen_make_arguments(p, NULL, NULL, NULL, NULL, a) } |
| slash_without_default[asdl_seq*]: a=plain_names ',' '/' { a } |
| slash_with_default[SlashWithDefault*]: a=[n=plain_names ',' { n }] b=names_with_default ',' '/' { |
| _PyPegen_slash_with_default(p, a, b) } |
| star_etc[StarEtc*]: |
| | '*' a=plain_name b=name_with_optional_default* c=[',' d=kwds { d }] [','] { |
| _PyPegen_star_etc(p, a, b, c) } |
| | '*' b=name_with_optional_default+ c=[',' d=kwds { d }] [','] { |
| _PyPegen_star_etc(p, NULL, b, c) } |
| | a=kwds [','] { _PyPegen_star_etc(p, NULL, NULL, a) } |
| name_with_optional_default[NameDefaultPair*]: |
| | ',' a=plain_name b=['=' e=expression { e }] { _PyPegen_name_default_pair(p, a, b) } |
| names_with_default[asdl_seq*]: a=','.name_with_default+ { a } |
| name_with_default[NameDefaultPair*]: |
| | n=plain_name '=' e=expression { _PyPegen_name_default_pair(p, n, e) } |
| plain_names[asdl_seq*] (memo): a=','.(plain_name !'=')+ { a } |
| plain_name[arg_ty]: |
| | a=NAME b=[':' z=annotation { z }] { _Py_arg(a->v.Name.id, b, NULL, EXTRA) } |
| kwds[arg_ty]: |
| | '**' a=plain_name { a } |
| annotation[expr_ty]: expression |
| |
| decorators[asdl_seq*]: a=('@' f=named_expression NEWLINE { f })+ { a } |
| |
| class_def[stmt_ty]: |
| | a=decorators b=class_def_raw { _PyPegen_class_def_decorators(p, a, b) } |
| | class_def_raw |
| class_def_raw[stmt_ty]: |
| | 'class' a=NAME b=['(' z=[arguments] ')' { z }] ':' c=block { |
| _Py_ClassDef(a->v.Name.id, |
| (b) ? ((expr_ty) b)->v.Call.args : NULL, |
| (b) ? ((expr_ty) b)->v.Call.keywords : NULL, |
| c, NULL, EXTRA) } |
| |
| block[asdl_seq*] (memo): |
| | NEWLINE INDENT a=statements DEDENT { a } |
| | simple_stmt |
| | invalid_block |
| |
| expressions_list[asdl_seq*]: a=','.star_expression+ [','] { a } |
| star_expressions[expr_ty]: |
| | a=star_expression b=(',' c=star_expression { c })+ [','] { |
| _Py_Tuple(CHECK(_PyPegen_seq_insert_in_front(p, a, b)), Load, EXTRA) } |
| | a=star_expression ',' { _Py_Tuple(CHECK(_PyPegen_singleton_seq(p, a)), Load, EXTRA) } |
| | star_expression |
| star_expression[expr_ty] (memo): |
| | '*' a=bitwise_or { _Py_Starred(a, Load, EXTRA) } |
| | expression |
| |
| star_named_expressions[asdl_seq*]: a=','.star_named_expression+ [','] { a } |
| star_named_expression[expr_ty]: |
| | '*' a=bitwise_or { _Py_Starred(a, Load, EXTRA) } |
| | named_expression |
| named_expression[expr_ty]: |
| | a=NAME ':=' b=expression { _Py_NamedExpr(CHECK(_PyPegen_set_expr_context(p, a, Store)), b, EXTRA) } |
| | expression !':=' |
| | invalid_named_expression |
| |
| annotated_rhs[expr_ty]: yield_expr | star_expressions |
| |
| expressions[expr_ty]: |
| | a=expression b=(',' c=expression { c })+ [','] { |
| _Py_Tuple(CHECK(_PyPegen_seq_insert_in_front(p, a, b)), Load, EXTRA) } |
| | a=expression ',' { _Py_Tuple(CHECK(_PyPegen_singleton_seq(p, a)), Load, EXTRA) } |
| | expression |
| expression[expr_ty] (memo): |
| | a=disjunction 'if' b=disjunction 'else' c=expression { _Py_IfExp(b, a, c, EXTRA) } |
| | disjunction |
| | lambdef |
| |
| lambdef[expr_ty]: |
| | 'lambda' a=[lambda_parameters] ':' b=expression { _Py_Lambda((a) ? a : CHECK(_PyPegen_empty_arguments(p)), b, EXTRA) } |
| 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 }] { |
| _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 }] { |
| _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 }] { |
| _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_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_star_etc[StarEtc*]: |
| | '*' a=lambda_plain_name b=lambda_name_with_optional_default* c=[',' d=lambda_kwds { d }] [','] { |
| _PyPegen_star_etc(p, a, b, c) } |
| | '*' b=lambda_name_with_optional_default+ c=[',' d=lambda_kwds { d }] [','] { |
| _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) } |
| 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) } |
| 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 } |
| |
| disjunction[expr_ty] (memo): |
| | a=conjunction b=('or' c=conjunction { c })+ { _Py_BoolOp( |
| Or, |
| CHECK(_PyPegen_seq_insert_in_front(p, a, b)), |
| EXTRA) } |
| | conjunction |
| conjunction[expr_ty] (memo): |
| | a=inversion b=('and' c=inversion { c })+ { _Py_BoolOp( |
| And, |
| CHECK(_PyPegen_seq_insert_in_front(p, a, b)), |
| EXTRA) } |
| | inversion |
| inversion[expr_ty] (memo): |
| | 'not' a=inversion { _Py_UnaryOp(Not, a, EXTRA) } |
| | comparison |
| comparison[expr_ty]: |
| | a=bitwise_or b=compare_op_bitwise_or_pair+ { |
| _Py_Compare(a, CHECK(_PyPegen_get_cmpops(p, b)), CHECK(_PyPegen_get_exprs(p, b)), EXTRA) } |
| | bitwise_or |
| compare_op_bitwise_or_pair[CmpopExprPair*]: |
| | eq_bitwise_or |
| | noteq_bitwise_or |
| | lte_bitwise_or |
| | lt_bitwise_or |
| | gte_bitwise_or |
| | gt_bitwise_or |
| | notin_bitwise_or |
| | in_bitwise_or |
| | isnot_bitwise_or |
| | is_bitwise_or |
| eq_bitwise_or[CmpopExprPair*]: '==' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, Eq, a) } |
| noteq_bitwise_or[CmpopExprPair*]: |
| | (tok='!=' {_PyPegen_check_barry_as_flufl(p) ? NULL : tok}) a=bitwise_or {_PyPegen_cmpop_expr_pair(p, NotEq, a) } |
| lte_bitwise_or[CmpopExprPair*]: '<=' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, LtE, a) } |
| lt_bitwise_or[CmpopExprPair*]: '<' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, Lt, a) } |
| gte_bitwise_or[CmpopExprPair*]: '>=' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, GtE, a) } |
| gt_bitwise_or[CmpopExprPair*]: '>' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, Gt, a) } |
| notin_bitwise_or[CmpopExprPair*]: 'not' 'in' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, NotIn, a) } |
| in_bitwise_or[CmpopExprPair*]: 'in' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, In, a) } |
| isnot_bitwise_or[CmpopExprPair*]: 'is' 'not' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, IsNot, a) } |
| is_bitwise_or[CmpopExprPair*]: 'is' a=bitwise_or { _PyPegen_cmpop_expr_pair(p, Is, a) } |
| |
| bitwise_or[expr_ty]: |
| | a=bitwise_or '|' b=bitwise_xor { _Py_BinOp(a, BitOr, b, EXTRA) } |
| | bitwise_xor |
| bitwise_xor[expr_ty]: |
| | a=bitwise_xor '^' b=bitwise_and { _Py_BinOp(a, BitXor, b, EXTRA) } |
| | bitwise_and |
| bitwise_and[expr_ty]: |
| | a=bitwise_and '&' b=shift_expr { _Py_BinOp(a, BitAnd, b, EXTRA) } |
| | shift_expr |
| shift_expr[expr_ty]: |
| | a=shift_expr '<<' b=sum { _Py_BinOp(a, LShift, b, EXTRA) } |
| | a=shift_expr '>>' b=sum { _Py_BinOp(a, RShift, b, EXTRA) } |
| | sum |
| |
| sum[expr_ty]: |
| | a=sum '+' b=term { _Py_BinOp(a, Add, b, EXTRA) } |
| | a=sum '-' b=term { _Py_BinOp(a, Sub, b, EXTRA) } |
| | term |
| term[expr_ty]: |
| | a=term '*' b=factor { _Py_BinOp(a, Mult, b, EXTRA) } |
| | a=term '/' b=factor { _Py_BinOp(a, Div, b, EXTRA) } |
| | a=term '//' b=factor { _Py_BinOp(a, FloorDiv, b, EXTRA) } |
| | a=term '%' b=factor { _Py_BinOp(a, Mod, b, EXTRA) } |
| | a=term '@' b=factor { _Py_BinOp(a, MatMult, b, EXTRA) } |
| | factor |
| factor[expr_ty] (memo): |
| | '+' a=factor { _Py_UnaryOp(UAdd, a, EXTRA) } |
| | '-' a=factor { _Py_UnaryOp(USub, a, EXTRA) } |
| | '~' a=factor { _Py_UnaryOp(Invert, a, EXTRA) } |
| | power |
| power[expr_ty]: |
| | a=await_primary '**' b=factor { _Py_BinOp(a, Pow, b, EXTRA) } |
| | await_primary |
| await_primary[expr_ty] (memo): |
| | AWAIT a=primary { _Py_Await(a, EXTRA) } |
| | primary |
| primary[expr_ty]: |
| | a=primary '.' b=NAME { _Py_Attribute(a, b->v.Name.id, Load, EXTRA) } |
| | a=primary b=genexp { _Py_Call(a, CHECK(_PyPegen_singleton_seq(p, b)), NULL, EXTRA) } |
| | a=primary '(' b=[arguments] ')' { |
| _Py_Call(a, |
| (b) ? ((expr_ty) b)->v.Call.args : NULL, |
| (b) ? ((expr_ty) b)->v.Call.keywords : NULL, |
| EXTRA) } |
| | a=primary '[' b=slices ']' { _Py_Subscript(a, b, Load, EXTRA) } |
| | atom |
| |
| slices[expr_ty]: |
| | a=slice !',' { a } |
| | a=','.slice+ [','] { _Py_Tuple(a, Load, EXTRA) } |
| slice[expr_ty]: |
| | a=[expression] ':' b=[expression] c=[':' d=[expression] { d }] { _Py_Slice(a, b, c, EXTRA) } |
| | a=expression { a } |
| atom[expr_ty]: |
| | NAME |
| | 'True' { _Py_Constant(Py_True, NULL, EXTRA) } |
| | 'False' { _Py_Constant(Py_False, NULL, EXTRA) } |
| | 'None' { _Py_Constant(Py_None, NULL, EXTRA) } |
| | '__new_parser__' { RAISE_SYNTAX_ERROR("You found it!") } |
| | &STRING strings |
| | NUMBER |
| | &'(' (tuple | group | genexp) |
| | &'[' (list | listcomp) |
| | &'{' (dict | set | dictcomp | setcomp) |
| | '...' { _Py_Constant(Py_Ellipsis, NULL, EXTRA) } |
| |
| strings[expr_ty] (memo): a=STRING+ { _PyPegen_concatenate_strings(p, a) } |
| list[expr_ty]: |
| | '[' a=[star_named_expressions] ']' { _Py_List(a, Load, EXTRA) } |
| listcomp[expr_ty]: |
| | '[' a=named_expression b=for_if_clauses ']' { _Py_ListComp(a, b, EXTRA) } |
| | invalid_comprehension |
| tuple[expr_ty]: |
| | '(' a=[y=star_named_expression ',' z=[star_named_expressions] { _PyPegen_seq_insert_in_front(p, y, z) } ] ')' { |
| _Py_Tuple(a, Load, EXTRA) } |
| group[expr_ty]: '(' a=(yield_expr | named_expression) ')' { a } |
| genexp[expr_ty]: |
| | '(' a=expression b=for_if_clauses ')' { _Py_GeneratorExp(a, b, EXTRA) } |
| | invalid_comprehension |
| set[expr_ty]: '{' a=expressions_list '}' { _Py_Set(a, EXTRA) } |
| setcomp[expr_ty]: |
| | '{' a=expression b=for_if_clauses '}' { _Py_SetComp(a, b, EXTRA) } |
| | invalid_comprehension |
| dict[expr_ty]: |
| | '{' a=[kvpairs] '}' { _Py_Dict(CHECK(_PyPegen_get_keys(p, a)), |
| CHECK(_PyPegen_get_values(p, a)), EXTRA) } |
| dictcomp[expr_ty]: |
| | '{' a=kvpair b=for_if_clauses '}' { _Py_DictComp(a->key, a->value, b, EXTRA) } |
| kvpairs[asdl_seq*]: a=','.kvpair+ [','] { a } |
| kvpair[KeyValuePair*]: |
| | '**' a=bitwise_or { _PyPegen_key_value_pair(p, NULL, a) } |
| | a=expression ':' b=expression { _PyPegen_key_value_pair(p, a, b) } |
| for_if_clauses[asdl_seq*]: |
| | a=(y=[ASYNC] 'for' a=star_targets 'in' b=disjunction c=('if' z=disjunction { z })* |
| { _Py_comprehension(a, b, c, y != NULL, p->arena) })+ { a } |
| |
| yield_expr[expr_ty]: |
| | 'yield' 'from' a=expression { _Py_YieldFrom(a, EXTRA) } |
| | 'yield' a=[star_expressions] { _Py_Yield(a, EXTRA) } |
| |
| arguments[expr_ty] (memo): |
| | a=args [','] &')' { a } |
| | incorrect_arguments |
| args[expr_ty]: |
| | a=starred_expression b=[',' c=args { c }] { |
| _Py_Call(_PyPegen_dummy_name(p), |
| (b) ? CHECK(_PyPegen_seq_insert_in_front(p, a, ((expr_ty) b)->v.Call.args)) |
| : CHECK(_PyPegen_singleton_seq(p, a)), |
| (b) ? ((expr_ty) b)->v.Call.keywords : NULL, |
| EXTRA) } |
| | a=kwargs { _Py_Call(_PyPegen_dummy_name(p), |
| CHECK_NULL_ALLOWED(_PyPegen_seq_extract_starred_exprs(p, a)), |
| CHECK_NULL_ALLOWED(_PyPegen_seq_delete_starred_exprs(p, a)), |
| EXTRA) } |
| | a=named_expression b=[',' c=args { c }] { |
| _Py_Call(_PyPegen_dummy_name(p), |
| (b) ? CHECK(_PyPegen_seq_insert_in_front(p, a, ((expr_ty) b)->v.Call.args)) |
| : CHECK(_PyPegen_singleton_seq(p, a)), |
| (b) ? ((expr_ty) b)->v.Call.keywords : NULL, |
| EXTRA) } |
| kwargs[asdl_seq*]: |
| | a=','.kwarg_or_starred+ ',' b=','.kwarg_or_double_starred+ { _PyPegen_join_sequences(p, a, b) } |
| | ','.kwarg_or_starred+ |
| | ','.kwarg_or_double_starred+ |
| starred_expression[expr_ty]: |
| | '*' a=expression { _Py_Starred(a, Load, EXTRA) } |
| kwarg_or_starred[KeywordOrStarred*]: |
| | a=NAME '=' b=expression { |
| _PyPegen_keyword_or_starred(p, CHECK(_Py_keyword(a->v.Name.id, b, EXTRA)), 1) } |
| | a=starred_expression { _PyPegen_keyword_or_starred(p, a, 0) } |
| kwarg_or_double_starred[KeywordOrStarred*]: |
| | a=NAME '=' b=expression { |
| _PyPegen_keyword_or_starred(p, CHECK(_Py_keyword(a->v.Name.id, b, EXTRA)), 1) } |
| | '**' a=expression { _PyPegen_keyword_or_starred(p, CHECK(_Py_keyword(NULL, a, EXTRA)), 1) } |
| |
| # NOTE: star_targets may contain *bitwise_or, targets may not. |
| star_targets[expr_ty]: |
| | a=star_target !',' { a } |
| | a=star_target b=(',' c=star_target { c })* [','] { |
| _Py_Tuple(CHECK(_PyPegen_seq_insert_in_front(p, a, b)), Store, EXTRA) } |
| star_targets_seq[asdl_seq*]: a=','.star_target+ [','] { a } |
| star_target[expr_ty] (memo): |
| | '*' a=(!'*' star_target) { |
| _Py_Starred(CHECK(_PyPegen_set_expr_context(p, a, Store)), Store, EXTRA) } |
| | a=t_primary '.' b=NAME !t_lookahead { _Py_Attribute(a, b->v.Name.id, Store, EXTRA) } |
| | a=t_primary '[' b=slices ']' !t_lookahead { _Py_Subscript(a, b, Store, EXTRA) } |
| | star_atom |
| star_atom[expr_ty]: |
| | a=NAME { _PyPegen_set_expr_context(p, a, Store) } |
| | '(' a=star_target ')' { _PyPegen_set_expr_context(p, a, Store) } |
| | '(' a=[star_targets_seq] ')' { _Py_Tuple(a, Store, EXTRA) } |
| | '[' a=[star_targets_seq] ']' { _Py_List(a, Store, EXTRA) } |
| |
| inside_paren_ann_assign_target[expr_ty]: |
| | ann_assign_subscript_attribute_target |
| | a=NAME { _PyPegen_set_expr_context(p, a, Store) } |
| | '(' a=inside_paren_ann_assign_target ')' { a } |
| |
| ann_assign_subscript_attribute_target[expr_ty]: |
| | a=t_primary '.' b=NAME !t_lookahead { _Py_Attribute(a, b->v.Name.id, Store, EXTRA) } |
| | a=t_primary '[' b=slices ']' !t_lookahead { _Py_Subscript(a, b, Store, EXTRA) } |
| |
| del_targets[asdl_seq*]: a=','.del_target+ [','] { a } |
| del_target[expr_ty] (memo): |
| | a=t_primary '.' b=NAME !t_lookahead { _Py_Attribute(a, b->v.Name.id, Del, EXTRA) } |
| | a=t_primary '[' b=slices ']' !t_lookahead { _Py_Subscript(a, b, Del, EXTRA) } |
| | del_t_atom |
| del_t_atom[expr_ty]: |
| | a=NAME { _PyPegen_set_expr_context(p, a, Del) } |
| | '(' a=del_target ')' { _PyPegen_set_expr_context(p, a, Del) } |
| | '(' a=[del_targets] ')' { _Py_Tuple(a, Del, EXTRA) } |
| | '[' a=[del_targets] ']' { _Py_List(a, Del, EXTRA) } |
| |
| targets[asdl_seq*]: a=','.target+ [','] { a } |
| target[expr_ty] (memo): |
| | a=t_primary '.' b=NAME !t_lookahead { _Py_Attribute(a, b->v.Name.id, Store, EXTRA) } |
| | a=t_primary '[' b=slices ']' !t_lookahead { _Py_Subscript(a, b, Store, EXTRA) } |
| | t_atom |
| t_primary[expr_ty]: |
| | a=t_primary '.' b=NAME &t_lookahead { _Py_Attribute(a, b->v.Name.id, Load, EXTRA) } |
| | a=t_primary '[' b=slices ']' &t_lookahead { _Py_Subscript(a, b, Load, EXTRA) } |
| | a=t_primary b=genexp &t_lookahead { _Py_Call(a, CHECK(_PyPegen_singleton_seq(p, b)), NULL, EXTRA) } |
| | a=t_primary '(' b=[arguments] ')' &t_lookahead { |
| _Py_Call(a, |
| (b) ? ((expr_ty) b)->v.Call.args : NULL, |
| (b) ? ((expr_ty) b)->v.Call.keywords : NULL, |
| EXTRA) } |
| | a=atom &t_lookahead { a } |
| t_lookahead: '(' | '[' | '.' |
| t_atom[expr_ty]: |
| | a=NAME { _PyPegen_set_expr_context(p, a, Store) } |
| | '(' a=target ')' { _PyPegen_set_expr_context(p, a, Store) } |
| | '(' b=[targets] ')' { _Py_Tuple(b, Store, EXTRA) } |
| | '[' b=[targets] ']' { _Py_List(b, Store, EXTRA) } |
| |
| |
| # From here on, there are rules for invalid syntax with specialised error messages |
| incorrect_arguments: |
| | args ',' '*' { RAISE_SYNTAX_ERROR("iterable argument unpacking follows keyword argument unpacking") } |
| | expression for_if_clauses ',' [args | expression for_if_clauses] { |
| RAISE_SYNTAX_ERROR("Generator expression must be parenthesized") } |
| | a=args ',' args { _PyPegen_arguments_parsing_error(p, a) } |
| invalid_named_expression: |
| | a=expression ':=' expression { |
| RAISE_SYNTAX_ERROR("cannot use assignment expressions with %s", _PyPegen_get_expr_name(a)) } |
| invalid_assignment: |
| | list ':' { RAISE_SYNTAX_ERROR("only single target (not list) can be annotated") } |
| | tuple ':' { RAISE_SYNTAX_ERROR("only single target (not tuple) can be annotated") } |
| | expression ':' expression ['=' annotated_rhs] { |
| RAISE_SYNTAX_ERROR("illegal target for annotation") } |
| | a=expression ('=' | augassign) (yield_expr | star_expressions) { |
| RAISE_SYNTAX_ERROR("cannot assign to %s", _PyPegen_get_expr_name(a)) } |
| invalid_block: |
| | NEWLINE !INDENT { RAISE_INDENTATION_ERROR("expected an indented block") } |
| invalid_comprehension: |
| | ('[' | '(' | '{') '*' expression for_if_clauses { |
| RAISE_SYNTAX_ERROR("iterable unpacking cannot be used in comprehension") } |
| invalid_parameters: |
| | [plain_names ','] (slash_with_default | names_with_default) ',' plain_names { |
| RAISE_SYNTAX_ERROR("non-default argument follows default argument") } |