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147e579e28
circuitpython/py/grammar.h
Damien George 5335942b59 py/compile: Refactor handling of special super() call. 
This patch refactors the handling of the special super() call within the
compiler.  It removes the need for a global (to the compiler) state variable
which keeps track of whether the subject of an expression is super.  The
handling of super() is now done entirely within one function, which makes
the compiler a bit cleaner and allows to easily add more optimisations to
super calls.

Changes to the code size are:

   bare-arm: +12
    minimal:  +0
   unix x64: +48
unix nanbox: -16
     stmhal:  +4
     cc3200:  +0
    esp8266: -56
2017-04-22 21:46:32 +10:00

358 lines
22 KiB
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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013-2015 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
// rules for writing rules:
// - zero_or_more is implemented using opt_rule around a one_or_more rule
// - don't put opt_rule in arguments of or rule; instead, wrap the call to this or rule in opt_rule
// # Start symbols for the grammar:
// # single_input is a single interactive statement;
// # file_input is a module or sequence of commands read from an input file;
// # eval_input is the input for the eval() functions.
// # NB: compound_stmt in single_input is followed by extra NEWLINE! --> not in Micro Python
// single_input: NEWLINE | simple_stmt | compound_stmt
// file_input: (NEWLINE | stmt)* ENDMARKER
// eval_input: testlist NEWLINE* ENDMARKER
DEF_RULE_NC(single_input, or(3), tok(NEWLINE), rule(simple_stmt), rule(compound_stmt))
DEF_RULE(file_input, c(generic_all_nodes), and_ident(1), opt_rule(file_input_2))
DEF_RULE(file_input_2, c(generic_all_nodes), one_or_more, rule(file_input_3))
DEF_RULE_NC(file_input_3, or(2), tok(NEWLINE), rule(stmt))
DEF_RULE_NC(eval_input, and_ident(2), rule(testlist), opt_rule(eval_input_2))
DEF_RULE_NC(eval_input_2, and(1), tok(NEWLINE))
// decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
// decorators: decorator+
// decorated: decorators (classdef | funcdef | async_funcdef)
// funcdef: 'def' NAME parameters ['->' test] ':' suite
// async_funcdef: 'async' funcdef
// parameters: '(' [typedargslist] ')'
// typedargslist: tfpdef ['=' test] (',' tfpdef ['=' test])* [',' ['*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] | '**' tfpdef]] | '*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] | '**' tfpdef
// tfpdef: NAME [':' test]
// varargslist: vfpdef ['=' test] (',' vfpdef ['=' test])* [',' ['*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] | '**' vfpdef]] | '*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] | '**' vfpdef
// vfpdef: NAME
DEF_RULE_NC(decorator, and(4), tok(DEL_AT), rule(dotted_name), opt_rule(trailer_paren), tok(NEWLINE))
DEF_RULE_NC(decorators, one_or_more, rule(decorator))
DEF_RULE(decorated, c(decorated), and_ident(2), rule(decorators), rule(decorated_body))
#if MICROPY_PY_ASYNC_AWAIT
DEF_RULE_NC(decorated_body, or(3), rule(classdef), rule(funcdef), rule(async_funcdef))
DEF_RULE_NC(async_funcdef, and(2), tok(KW_ASYNC), rule(funcdef))
#else
DEF_RULE_NC(decorated_body, or(2), rule(classdef), rule(funcdef))
#endif
DEF_RULE(funcdef, c(funcdef), and_blank(8), tok(KW_DEF), tok(NAME), tok(DEL_PAREN_OPEN), opt_rule(typedargslist), tok(DEL_PAREN_CLOSE), opt_rule(funcdefrettype), tok(DEL_COLON), rule(suite))
DEF_RULE_NC(funcdefrettype, and_ident(2), tok(DEL_MINUS_MORE), rule(test))
// note: typedargslist lets through more than is allowed, compiler does further checks
DEF_RULE_NC(typedargslist, list_with_end, rule(typedargslist_item), tok(DEL_COMMA))
DEF_RULE_NC(typedargslist_item, or(3), rule(typedargslist_name), rule(typedargslist_star), rule(typedargslist_dbl_star))
DEF_RULE_NC(typedargslist_name, and_ident(3), tok(NAME), opt_rule(typedargslist_colon), opt_rule(typedargslist_equal))
DEF_RULE_NC(typedargslist_star, and(2), tok(OP_STAR), opt_rule(tfpdef))
DEF_RULE_NC(typedargslist_dbl_star, and(3), tok(OP_DBL_STAR), tok(NAME), opt_rule(typedargslist_colon))
DEF_RULE_NC(typedargslist_colon, and_ident(2), tok(DEL_COLON), rule(test))
DEF_RULE_NC(typedargslist_equal, and_ident(2), tok(DEL_EQUAL), rule(test))
DEF_RULE_NC(tfpdef, and(2), tok(NAME), opt_rule(typedargslist_colon))
// note: varargslist lets through more than is allowed, compiler does further checks
DEF_RULE_NC(varargslist, list_with_end, rule(varargslist_item), tok(DEL_COMMA))
DEF_RULE_NC(varargslist_item, or(3), rule(varargslist_name), rule(varargslist_star), rule(varargslist_dbl_star))
DEF_RULE_NC(varargslist_name, and_ident(2), tok(NAME), opt_rule(varargslist_equal))
DEF_RULE_NC(varargslist_star, and(2), tok(OP_STAR), opt_rule(vfpdef))
DEF_RULE_NC(varargslist_dbl_star, and(2), tok(OP_DBL_STAR), tok(NAME))
DEF_RULE_NC(varargslist_equal, and_ident(2), tok(DEL_EQUAL), rule(test))
DEF_RULE_NC(vfpdef, and_ident(1), tok(NAME))
// stmt: compound_stmt | simple_stmt
DEF_RULE_NC(stmt, or(2), rule(compound_stmt), rule(simple_stmt))
// simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
DEF_RULE_NC(simple_stmt, and_ident(2), rule(simple_stmt_2), tok(NEWLINE))
DEF_RULE(simple_stmt_2, c(generic_all_nodes), list_with_end, rule(small_stmt), tok(DEL_SEMICOLON))
// small_stmt: expr_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt | nonlocal_stmt | assert_stmt
// 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
DEF_RULE_NC(small_stmt, or(8), rule(del_stmt), rule(pass_stmt), rule(flow_stmt), rule(import_stmt), rule(global_stmt), rule(nonlocal_stmt), rule(assert_stmt), rule(expr_stmt))
DEF_RULE(expr_stmt, c(expr_stmt), and(2), rule(testlist_star_expr), opt_rule(expr_stmt_2))
DEF_RULE_NC(expr_stmt_2, or(2), rule(expr_stmt_augassign), rule(expr_stmt_assign_list))
DEF_RULE_NC(expr_stmt_augassign, and_ident(2), rule(augassign), rule(expr_stmt_6))
DEF_RULE_NC(expr_stmt_assign_list, one_or_more, rule(expr_stmt_assign))
DEF_RULE_NC(expr_stmt_assign, and_ident(2), tok(DEL_EQUAL), rule(expr_stmt_6))
DEF_RULE_NC(expr_stmt_6, or(2), rule(yield_expr), rule(testlist_star_expr))
DEF_RULE(testlist_star_expr, c(generic_tuple), list_with_end, rule(testlist_star_expr_2), tok(DEL_COMMA))
DEF_RULE_NC(testlist_star_expr_2, or(2), rule(star_expr), rule(test))
DEF_RULE_NC(augassign, or(12), tok(DEL_PLUS_EQUAL), tok(DEL_MINUS_EQUAL), tok(DEL_STAR_EQUAL), tok(DEL_SLASH_EQUAL), tok(DEL_PERCENT_EQUAL), tok(DEL_AMPERSAND_EQUAL), tok(DEL_PIPE_EQUAL), tok(DEL_CARET_EQUAL), tok(DEL_DBL_LESS_EQUAL), tok(DEL_DBL_MORE_EQUAL), tok(DEL_DBL_STAR_EQUAL), tok(DEL_DBL_SLASH_EQUAL))
// del_stmt: 'del' exprlist
// pass_stmt: 'pass'
// flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt
// break_stmt: 'break'
// continue_stmt: 'continue'
// return_stmt: 'return' [testlist]
// yield_stmt: yield_expr
// raise_stmt: 'raise' [test ['from' test]]
DEF_RULE(del_stmt, c(del_stmt), and(2), tok(KW_DEL), rule(exprlist))
DEF_RULE(pass_stmt, c(generic_all_nodes), and(1), tok(KW_PASS))
DEF_RULE_NC(flow_stmt, or(5), rule(break_stmt), rule(continue_stmt), rule(return_stmt), rule(raise_stmt), rule(yield_stmt))
DEF_RULE(break_stmt, c(break_stmt), and(1), tok(KW_BREAK))
DEF_RULE(continue_stmt, c(continue_stmt), and(1), tok(KW_CONTINUE))
DEF_RULE(return_stmt, c(return_stmt), and(2), tok(KW_RETURN), opt_rule(testlist))
DEF_RULE(yield_stmt, c(yield_stmt), and(1), rule(yield_expr))
DEF_RULE(raise_stmt, c(raise_stmt), and(2), tok(KW_RAISE), opt_rule(raise_stmt_arg))
DEF_RULE_NC(raise_stmt_arg, and_ident(2), rule(test), opt_rule(raise_stmt_from))
DEF_RULE_NC(raise_stmt_from, and_ident(2), tok(KW_FROM), rule(test))
// import_stmt: import_name | import_from
// import_name: 'import' dotted_as_names
// import_from: 'from' (('.' | '...')* dotted_name | ('.' | '...')+) 'import' ('*' | '(' import_as_names ')' | import_as_names)
// import_as_name: NAME ['as' NAME]
// dotted_as_name: dotted_name ['as' NAME]
// import_as_names: import_as_name (',' import_as_name)* [',']
// dotted_as_names: dotted_as_name (',' dotted_as_name)*
// dotted_name: NAME ('.' NAME)*
// global_stmt: 'global' NAME (',' NAME)*
// nonlocal_stmt: 'nonlocal' NAME (',' NAME)*
// assert_stmt: 'assert' test [',' test]
DEF_RULE_NC(import_stmt, or(2), rule(import_name), rule(import_from))
DEF_RULE(import_name, c(import_name), and(2), tok(KW_IMPORT), rule(dotted_as_names))
DEF_RULE(import_from, c(import_from), and(4), tok(KW_FROM), rule(import_from_2), tok(KW_IMPORT), rule(import_from_3))
DEF_RULE_NC(import_from_2, or(2), rule(dotted_name), rule(import_from_2b))
DEF_RULE_NC(import_from_2b, and_ident(2), rule(one_or_more_period_or_ellipsis), opt_rule(dotted_name))
DEF_RULE_NC(import_from_3, or(3), tok(OP_STAR), rule(import_as_names_paren), rule(import_as_names))
DEF_RULE_NC(import_as_names_paren, and_ident(3), tok(DEL_PAREN_OPEN), rule(import_as_names), tok(DEL_PAREN_CLOSE))
DEF_RULE_NC(one_or_more_period_or_ellipsis, one_or_more, rule(period_or_ellipsis))
DEF_RULE_NC(period_or_ellipsis, or(2), tok(DEL_PERIOD), tok(ELLIPSIS))
DEF_RULE_NC(import_as_name, and(2), tok(NAME), opt_rule(as_name))
DEF_RULE_NC(dotted_as_name, and_ident(2), rule(dotted_name), opt_rule(as_name))
DEF_RULE_NC(as_name, and_ident(2), tok(KW_AS), tok(NAME))
DEF_RULE_NC(import_as_names, list_with_end, rule(import_as_name), tok(DEL_COMMA))
DEF_RULE_NC(dotted_as_names, list, rule(dotted_as_name), tok(DEL_COMMA))
DEF_RULE_NC(dotted_name, list, tok(NAME), tok(DEL_PERIOD))
DEF_RULE(global_stmt, c(global_stmt), and(2), tok(KW_GLOBAL), rule(name_list))
DEF_RULE(nonlocal_stmt, c(nonlocal_stmt), and(2), tok(KW_NONLOCAL), rule(name_list))
DEF_RULE_NC(name_list, list, tok(NAME), tok(DEL_COMMA))
DEF_RULE(assert_stmt, c(assert_stmt), and(3), tok(KW_ASSERT), rule(test), opt_rule(assert_stmt_extra))
DEF_RULE_NC(assert_stmt_extra, and_ident(2), tok(DEL_COMMA), rule(test))
// compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated | async_stmt
// if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
// while_stmt: 'while' test ':' suite ['else' ':' suite]
// for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]
// try_stmt: 'try' ':' suite ((except_clause ':' suite)+ ['else' ':' suite] ['finally' ':' suite] | 'finally' ':' suite)
// # NB compile.c makes sure that the default except clause is last
// except_clause: 'except' [test ['as' NAME]]
// with_stmt: 'with' with_item (',' with_item)* ':' suite
// with_item: test ['as' expr]
// suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
// async_stmt: 'async' (funcdef | with_stmt | for_stmt)
#if MICROPY_PY_ASYNC_AWAIT
DEF_RULE_NC(compound_stmt, or(9), rule(if_stmt), rule(while_stmt), rule(for_stmt), rule(try_stmt), rule(with_stmt), rule(funcdef), rule(classdef), rule(decorated), rule(async_stmt))
DEF_RULE(async_stmt, c(async_stmt), and(2), tok(KW_ASYNC), rule(async_stmt_2))
DEF_RULE_NC(async_stmt_2, or(3), rule(funcdef), rule(with_stmt), rule(for_stmt))
#else
DEF_RULE_NC(compound_stmt, or(8), rule(if_stmt), rule(while_stmt), rule(for_stmt), rule(try_stmt), rule(with_stmt), rule(funcdef), rule(classdef), rule(decorated))
#endif
DEF_RULE(if_stmt, c(if_stmt), and(6), tok(KW_IF), rule(test), tok(DEL_COLON), rule(suite), opt_rule(if_stmt_elif_list), opt_rule(else_stmt))
DEF_RULE_NC(if_stmt_elif_list, one_or_more, rule(if_stmt_elif))
DEF_RULE_NC(if_stmt_elif, and(4), tok(KW_ELIF), rule(test), tok(DEL_COLON), rule(suite))
DEF_RULE(while_stmt, c(while_stmt), and(5), tok(KW_WHILE), rule(test), tok(DEL_COLON), rule(suite), opt_rule(else_stmt))
DEF_RULE(for_stmt, c(for_stmt), and(7), tok(KW_FOR), rule(exprlist), tok(KW_IN), rule(testlist), tok(DEL_COLON), rule(suite), opt_rule(else_stmt))
DEF_RULE(try_stmt, c(try_stmt), and(4), tok(KW_TRY), tok(DEL_COLON), rule(suite), rule(try_stmt_2))
DEF_RULE_NC(try_stmt_2, or(2), rule(try_stmt_except_and_more), rule(try_stmt_finally))
DEF_RULE_NC(try_stmt_except_and_more, and_ident(3), rule(try_stmt_except_list), opt_rule(else_stmt), opt_rule(try_stmt_finally))
DEF_RULE_NC(try_stmt_except, and(4), tok(KW_EXCEPT), opt_rule(try_stmt_as_name), tok(DEL_COLON), rule(suite))
DEF_RULE_NC(try_stmt_as_name, and_ident(2), rule(test), opt_rule(as_name))
DEF_RULE_NC(try_stmt_except_list, one_or_more, rule(try_stmt_except))
DEF_RULE_NC(try_stmt_finally, and(3), tok(KW_FINALLY), tok(DEL_COLON), rule(suite))
DEF_RULE_NC(else_stmt, and_ident(3), tok(KW_ELSE), tok(DEL_COLON), rule(suite))
DEF_RULE(with_stmt, c(with_stmt), and(4), tok(KW_WITH), rule(with_stmt_list), tok(DEL_COLON), rule(suite))
DEF_RULE_NC(with_stmt_list, list, rule(with_item), tok(DEL_COMMA))
DEF_RULE_NC(with_item, and_ident(2), rule(test), opt_rule(with_item_as))
DEF_RULE_NC(with_item_as, and_ident(2), tok(KW_AS), rule(expr))
DEF_RULE_NC(suite, or(2), rule(suite_block), rule(simple_stmt))
DEF_RULE_NC(suite_block, and_ident(4), tok(NEWLINE), tok(INDENT), rule(suite_block_stmts), tok(DEDENT))
DEF_RULE(suite_block_stmts, c(generic_all_nodes), one_or_more, rule(stmt))
// 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
DEF_RULE_NC(test, or(2), rule(lambdef), rule(test_if_expr))
DEF_RULE(test_if_expr, c(test_if_expr), and_ident(2), rule(or_test), opt_rule(test_if_else))
DEF_RULE_NC(test_if_else, and(4), tok(KW_IF), rule(or_test), tok(KW_ELSE), rule(test))
DEF_RULE_NC(test_nocond, or(2), rule(lambdef_nocond), rule(or_test))
DEF_RULE(lambdef, c(lambdef), and_blank(4), tok(KW_LAMBDA), opt_rule(varargslist), tok(DEL_COLON), rule(test))
DEF_RULE(lambdef_nocond, c(lambdef), and_blank(4), tok(KW_LAMBDA), opt_rule(varargslist), tok(DEL_COLON), rule(test_nocond))
// or_test: and_test ('or' and_test)*
// and_test: not_test ('and' not_test)*
// not_test: 'not' not_test | comparison
// comparison: expr (comp_op expr)*
// comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is'|'is' 'not'
// star_expr: '*' expr
// expr: xor_expr ('|' xor_expr)*
// xor_expr: and_expr ('^' and_expr)*
// and_expr: shift_expr ('&' shift_expr)*
// shift_expr: arith_expr (('<<'|'>>') arith_expr)*
// arith_expr: term (('+'|'-') term)*
// term: factor (('*'|'/'|'%'|'//') factor)*
// factor: ('+'|'-'|'~') factor | power
// power: atom_expr ['**' factor]
// atom_expr: 'await' atom trailer* | atom trailer*
DEF_RULE(or_test, c(or_test), list, rule(and_test), tok(KW_OR))
DEF_RULE(and_test, c(and_test), list, rule(not_test), tok(KW_AND))
DEF_RULE_NC(not_test, or(2), rule(not_test_2), rule(comparison))
DEF_RULE(not_test_2, c(not_test_2), and(2), tok(KW_NOT), rule(not_test))
DEF_RULE(comparison, c(comparison), list, rule(expr), rule(comp_op))
DEF_RULE_NC(comp_op, or(9), tok(OP_LESS), tok(OP_MORE), tok(OP_DBL_EQUAL), tok(OP_LESS_EQUAL), tok(OP_MORE_EQUAL), tok(OP_NOT_EQUAL), tok(KW_IN), rule(comp_op_not_in), rule(comp_op_is))
DEF_RULE_NC(comp_op_not_in, and(2), tok(KW_NOT), tok(KW_IN))
DEF_RULE_NC(comp_op_is, and(2), tok(KW_IS), opt_rule(comp_op_is_not))
DEF_RULE_NC(comp_op_is_not, and(1), tok(KW_NOT))
DEF_RULE(star_expr, c(star_expr), and(2), tok(OP_STAR), rule(expr))
DEF_RULE(expr, c(expr), list, rule(xor_expr), tok(OP_PIPE))
DEF_RULE(xor_expr, c(xor_expr), list, rule(and_expr), tok(OP_CARET))
DEF_RULE(and_expr, c(and_expr), list, rule(shift_expr), tok(OP_AMPERSAND))
DEF_RULE(shift_expr, c(shift_expr), list, rule(arith_expr), rule(shift_op))
DEF_RULE_NC(shift_op, or(2), tok(OP_DBL_LESS), tok(OP_DBL_MORE))
DEF_RULE(arith_expr, c(arith_expr), list, rule(term), rule(arith_op))
DEF_RULE_NC(arith_op, or(2), tok(OP_PLUS), tok(OP_MINUS))
DEF_RULE(term, c(term), list, rule(factor), rule(term_op))
DEF_RULE_NC(term_op, or(4), tok(OP_STAR), tok(OP_SLASH), tok(OP_PERCENT), tok(OP_DBL_SLASH))
DEF_RULE_NC(factor, or(2), rule(factor_2), rule(power))
DEF_RULE(factor_2, c(factor_2), and_ident(2), rule(factor_op), rule(factor))
DEF_RULE_NC(factor_op, or(3), tok(OP_PLUS), tok(OP_MINUS), tok(OP_TILDE))
DEF_RULE(power, c(power), and_ident(2), rule(atom_expr), opt_rule(power_dbl_star))
#if MICROPY_PY_ASYNC_AWAIT
DEF_RULE_NC(atom_expr, or(2), rule(atom_expr_await), rule(atom_expr_normal))
DEF_RULE(atom_expr_await, c(atom_expr_await), and(3), tok(KW_AWAIT), rule(atom), opt_rule(atom_expr_trailers))
#else
DEF_RULE_NC(atom_expr, or(1), rule(atom_expr_normal))
#endif
DEF_RULE(atom_expr_normal, c(atom_expr_normal), and_ident(2), rule(atom), opt_rule(atom_expr_trailers))
DEF_RULE_NC(atom_expr_trailers, one_or_more, rule(trailer))
DEF_RULE_NC(power_dbl_star, and_ident(2), tok(OP_DBL_STAR), rule(factor))
// atom: '(' [yield_expr|testlist_comp] ')' | '[' [testlist_comp] ']' | '{' [dictorsetmaker] '}' | NAME | NUMBER | STRING+ | '...' | 'None' | 'True' | 'False'
// testlist_comp: (test|star_expr) ( comp_for | (',' (test|star_expr))* [','] )
// trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
DEF_RULE_NC(atom, or(12), tok(NAME), tok(INTEGER), tok(FLOAT_OR_IMAG), tok(STRING), tok(BYTES), tok(ELLIPSIS), tok(KW_NONE), tok(KW_TRUE), tok(KW_FALSE), rule(atom_paren), rule(atom_bracket), rule(atom_brace))
DEF_RULE(atom_paren, c(atom_paren), and(3), tok(DEL_PAREN_OPEN), opt_rule(atom_2b), tok(DEL_PAREN_CLOSE))
DEF_RULE_NC(atom_2b, or(2), rule(yield_expr), rule(testlist_comp))
DEF_RULE(atom_bracket, c(atom_bracket), and(3), tok(DEL_BRACKET_OPEN), opt_rule(testlist_comp), tok(DEL_BRACKET_CLOSE))
DEF_RULE(atom_brace, c(atom_brace), and(3), tok(DEL_BRACE_OPEN), opt_rule(dictorsetmaker), tok(DEL_BRACE_CLOSE))
DEF_RULE_NC(testlist_comp, and_ident(2), rule(testlist_comp_2), opt_rule(testlist_comp_3))
DEF_RULE_NC(testlist_comp_2, or(2), rule(star_expr), rule(test))
DEF_RULE_NC(testlist_comp_3, or(2), rule(comp_for), rule(testlist_comp_3b))
DEF_RULE_NC(testlist_comp_3b, and_ident(2), tok(DEL_COMMA), opt_rule(testlist_comp_3c))
DEF_RULE_NC(testlist_comp_3c, list_with_end, rule(testlist_comp_2), tok(DEL_COMMA))
DEF_RULE_NC(trailer, or(3), rule(trailer_paren), rule(trailer_bracket), rule(trailer_period))
DEF_RULE(trailer_paren, c(trailer_paren), and(3), tok(DEL_PAREN_OPEN), opt_rule(arglist), tok(DEL_PAREN_CLOSE))
DEF_RULE(trailer_bracket, c(trailer_bracket), and(3), tok(DEL_BRACKET_OPEN), rule(subscriptlist), tok(DEL_BRACKET_CLOSE))
DEF_RULE(trailer_period, c(trailer_period), and(2), tok(DEL_PERIOD), tok(NAME))
// subscriptlist: subscript (',' subscript)* [',']
// subscript: test | [test] ':' [test] [sliceop]
// sliceop: ':' [test]
#if MICROPY_PY_BUILTINS_SLICE
DEF_RULE(subscriptlist, c(generic_tuple), list_with_end, rule(subscript), tok(DEL_COMMA))
DEF_RULE_NC(subscript, or(2), rule(subscript_3), rule(subscript_2))
DEF_RULE(subscript_2, c(subscript_2), and_ident(2), rule(test), opt_rule(subscript_3))
DEF_RULE(subscript_3, c(subscript_3), and(2), tok(DEL_COLON), opt_rule(subscript_3b))
DEF_RULE_NC(subscript_3b, or(2), rule(subscript_3c), rule(subscript_3d))
DEF_RULE_NC(subscript_3c, and(2), tok(DEL_COLON), opt_rule(test))
DEF_RULE_NC(subscript_3d, and_ident(2), rule(test), opt_rule(sliceop))
DEF_RULE_NC(sliceop, and(2), tok(DEL_COLON), opt_rule(test))
#else
DEF_RULE(subscriptlist, c(generic_tuple), list_with_end, rule(test), tok(DEL_COMMA))
#endif
// exprlist: (expr|star_expr) (',' (expr|star_expr))* [',']
// testlist: test (',' test)* [',']
// dictorsetmaker: (test ':' test (comp_for | (',' test ':' test)* [','])) | (test (comp_for | (',' test)* [',']))
DEF_RULE_NC(exprlist, list_with_end, rule(exprlist_2), tok(DEL_COMMA))
DEF_RULE_NC(exprlist_2, or(2), rule(star_expr), rule(expr))
DEF_RULE(testlist, c(generic_tuple), list_with_end, rule(test), tok(DEL_COMMA))
// TODO dictorsetmaker lets through more than is allowed
DEF_RULE_NC(dictorsetmaker, and_ident(2), rule(dictorsetmaker_item), opt_rule(dictorsetmaker_tail))
#if MICROPY_PY_BUILTINS_SET
DEF_RULE(dictorsetmaker_item, c(dictorsetmaker_item), and_ident(2), rule(test), opt_rule(dictorsetmaker_colon))
DEF_RULE_NC(dictorsetmaker_colon, and_ident(2), tok(DEL_COLON), rule(test))
#else
DEF_RULE(dictorsetmaker_item, c(dictorsetmaker_item), and(3), rule(test), tok(DEL_COLON), rule(test))
#endif
DEF_RULE_NC(dictorsetmaker_tail, or(2), rule(comp_for), rule(dictorsetmaker_list))
DEF_RULE_NC(dictorsetmaker_list, and(2), tok(DEL_COMMA), opt_rule(dictorsetmaker_list2))
DEF_RULE_NC(dictorsetmaker_list2, list_with_end, rule(dictorsetmaker_item), tok(DEL_COMMA))
// classdef: 'class' NAME ['(' [arglist] ')'] ':' suite
DEF_RULE(classdef, c(classdef), and_blank(5), tok(KW_CLASS), tok(NAME), opt_rule(classdef_2), tok(DEL_COLON), rule(suite))
DEF_RULE_NC(classdef_2, and_ident(3), tok(DEL_PAREN_OPEN), opt_rule(arglist), tok(DEL_PAREN_CLOSE))
// arglist: (argument ',')* (argument [','] | '*' test (',' argument)* [',' '**' test] | '**' test)
// TODO arglist lets through more than is allowed, compiler needs to do further verification
DEF_RULE_NC(arglist, list_with_end, rule(arglist_2), tok(DEL_COMMA))
DEF_RULE_NC(arglist_2, or(3), rule(arglist_star), rule(arglist_dbl_star), rule(argument))
DEF_RULE_NC(arglist_star, and(2), tok(OP_STAR), rule(test))
DEF_RULE_NC(arglist_dbl_star, and(2), tok(OP_DBL_STAR), rule(test))
// # The reason that keywords are test nodes instead of NAME is that using NAME
// # results in an ambiguity. ast.c makes sure it's a NAME.
// argument: test [comp_for] | test '=' test # Really [keyword '='] test
// comp_iter: comp_for | comp_if
// comp_for: 'for' exprlist 'in' or_test [comp_iter]
// comp_if: 'if' test_nocond [comp_iter]
DEF_RULE_NC(argument, and_ident(2), rule(test), opt_rule(argument_2))
DEF_RULE_NC(argument_2, or(2), rule(comp_for), rule(argument_3))
DEF_RULE_NC(argument_3, and_ident(2), tok(DEL_EQUAL), rule(test))
DEF_RULE_NC(comp_iter, or(2), rule(comp_for), rule(comp_if))
DEF_RULE_NC(comp_for, and_blank(5), tok(KW_FOR), rule(exprlist), tok(KW_IN), rule(or_test), opt_rule(comp_iter))
DEF_RULE_NC(comp_if, and(3), tok(KW_IF), rule(test_nocond), opt_rule(comp_iter))
// # not used in grammar, but may appear in "node" passed from Parser to Compiler
// encoding_decl: NAME
// yield_expr: 'yield' [yield_arg]
// yield_arg: 'from' test | testlist
DEF_RULE(yield_expr, c(yield_expr), and(2), tok(KW_YIELD), opt_rule(yield_arg))
DEF_RULE_NC(yield_arg, or(2), rule(yield_arg_from), rule(testlist))
DEF_RULE_NC(yield_arg_from, and(2), tok(KW_FROM), rule(test))
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