mirror of
https://github.com/licsber/micropython.git
synced 2024-09-21 09:30:24 +08:00
7d414a1b52
Previous to this patch, a big-int, float or imag constant was interned (made into a qstr) and then parsed at runtime to create an object each time it was needed. This is wasteful in RAM and not efficient. Now, these constants are parsed straight away in the parser and turned into objects. This allows constants with large numbers of digits (so addresses issue #1103) and takes us a step closer to #722.
340 lines
22 KiB
C
340 lines
22 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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// rules for writing rules:
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// - zero_or_more is implemented using opt_rule around a one_or_more rule
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// - don't put opt_rule in arguments of or rule; instead, wrap the call to this or rule in opt_rule
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// # Start symbols for the grammar:
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// # single_input is a single interactive statement;
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// # file_input is a module or sequence of commands read from an input file;
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// # eval_input is the input for the eval() functions.
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// # NB: compound_stmt in single_input is followed by extra NEWLINE! --> not in Micro Python
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// single_input: NEWLINE | simple_stmt | compound_stmt
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// file_input: (NEWLINE | stmt)* ENDMARKER
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// eval_input: testlist NEWLINE* ENDMARKER
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DEF_RULE(single_input, nc, or(3), tok(NEWLINE), rule(simple_stmt), rule(compound_stmt))
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DEF_RULE(file_input, nc, and(1), opt_rule(file_input_2))
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DEF_RULE(file_input_2, c(generic_all_nodes), one_or_more, rule(file_input_3))
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DEF_RULE(file_input_3, nc, or(2), tok(NEWLINE), rule(stmt))
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DEF_RULE(eval_input, nc, and(2), rule(testlist), opt_rule(eval_input_2))
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DEF_RULE(eval_input_2, nc, and(1), tok(NEWLINE))
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// decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE
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// decorators: decorator+
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// decorated: decorators (classdef | funcdef)
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// funcdef: 'def' NAME parameters ['->' test] ':' suite
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// parameters: '(' [typedargslist] ')'
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// typedargslist: tfpdef ['=' test] (',' tfpdef ['=' test])* [',' ['*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] | '**' tfpdef]] | '*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] | '**' tfpdef
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// tfpdef: NAME [':' test]
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// varargslist: vfpdef ['=' test] (',' vfpdef ['=' test])* [',' ['*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] | '**' vfpdef]] | '*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] | '**' vfpdef
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// vfpdef: NAME
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DEF_RULE(decorator, nc, and(4), tok(DEL_AT), rule(dotted_name), opt_rule(trailer_paren), tok(NEWLINE))
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//DEF_RULE(decorator_2, nc, and(3), tok(DEL_PAREN_OPEN), opt_rule(arglist), tok(DEL_PAREN_CLOSE))
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DEF_RULE(decorators, nc, one_or_more, rule(decorator))
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DEF_RULE(decorated, c(decorated), and(2), rule(decorators), rule(decorated_body))
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DEF_RULE(decorated_body, nc, or(2), rule(classdef), rule(funcdef))
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DEF_RULE(funcdef, c(funcdef), blank | and(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))
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DEF_RULE(funcdefrettype, nc, ident | and(2), tok(DEL_MINUS_MORE), rule(test))
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// TODO typedargslist lets through more than is allowed
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DEF_RULE(typedargslist, nc, list_with_end, rule(typedargslist_item), tok(DEL_COMMA))
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DEF_RULE(typedargslist_item, nc, or(3), rule(typedargslist_name), rule(typedargslist_star), rule(typedargslist_dbl_star))
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DEF_RULE(typedargslist_name, nc, ident | and(3), tok(NAME), opt_rule(typedargslist_colon), opt_rule(typedargslist_equal))
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DEF_RULE(typedargslist_star, nc, and(2), tok(OP_STAR), opt_rule(tfpdef))
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DEF_RULE(typedargslist_dbl_star, nc, and(3), tok(OP_DBL_STAR), tok(NAME), opt_rule(typedargslist_colon))
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DEF_RULE(typedargslist_colon, nc, ident | and(2), tok(DEL_COLON), rule(test))
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DEF_RULE(typedargslist_equal, nc, ident | and(2), tok(DEL_EQUAL), rule(test))
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DEF_RULE(tfpdef, nc, and(2), tok(NAME), opt_rule(typedargslist_colon))
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// TODO varargslist lets through more than is allowed
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DEF_RULE(varargslist, nc, list_with_end, rule(varargslist_item), tok(DEL_COMMA))
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DEF_RULE(varargslist_item, nc, or(3), rule(varargslist_name), rule(varargslist_star), rule(varargslist_dbl_star))
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DEF_RULE(varargslist_name, nc, and(2), tok(NAME), opt_rule(varargslist_equal))
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DEF_RULE(varargslist_star, nc, and(2), tok(OP_STAR), opt_rule(vfpdef))
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DEF_RULE(varargslist_dbl_star, nc, and(2), tok(OP_DBL_STAR), tok(NAME))
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DEF_RULE(varargslist_equal, nc, and(2), tok(DEL_EQUAL), rule(test))
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DEF_RULE(vfpdef, nc, ident | and(1), tok(NAME))
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// stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated | simple_stmt
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DEF_RULE(stmt, nc, or(9), rule(if_stmt), rule(while_stmt), rule(for_stmt), rule(try_stmt), rule(with_stmt), rule(funcdef), rule(classdef), rule(decorated), rule(simple_stmt))
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// simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE
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DEF_RULE(simple_stmt, nc, and(2), rule(simple_stmt_2), tok(NEWLINE))
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DEF_RULE(simple_stmt_2, c(generic_all_nodes), list_with_end, rule(small_stmt), tok(DEL_SEMICOLON))
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// small_stmt: expr_stmt | del_stmt | pass_stmt | flow_stmt | import_stmt | global_stmt | nonlocal_stmt | assert_stmt
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// expr_stmt: testlist_star_expr (augassign (yield_expr|testlist) | ('=' (yield_expr|testlist_star_expr))*)
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// testlist_star_expr: (test|star_expr) (',' (test|star_expr))* [',']
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// augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' | '<<=' | '>>=' | '**=' | '//='
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// # For normal assignments, additional restrictions enforced by the interpreter
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DEF_RULE(small_stmt, nc, 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))
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DEF_RULE(expr_stmt, c(expr_stmt), and(2), rule(testlist_star_expr), opt_rule(expr_stmt_2))
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DEF_RULE(expr_stmt_2, nc, or(2), rule(expr_stmt_augassign), rule(expr_stmt_assign_list))
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DEF_RULE(expr_stmt_augassign, nc, and(2), rule(augassign), rule(expr_stmt_6))
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DEF_RULE(expr_stmt_assign_list, nc, one_or_more, rule(expr_stmt_assign))
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DEF_RULE(expr_stmt_assign, nc, and(2), tok(DEL_EQUAL), rule(expr_stmt_6))
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DEF_RULE(expr_stmt_6, nc, or(2), rule(yield_expr), rule(testlist_star_expr))
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DEF_RULE(testlist_star_expr, c(generic_tuple), list_with_end, rule(testlist_star_expr_2), tok(DEL_COMMA))
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DEF_RULE(testlist_star_expr_2, nc, or(2), rule(star_expr), rule(test))
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DEF_RULE(augassign, nc, 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))
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// del_stmt: 'del' exprlist
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// pass_stmt: 'pass'
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// flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | yield_stmt
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// break_stmt: 'break'
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// continue_stmt: 'continue'
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// return_stmt: 'return' [testlist]
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// yield_stmt: yield_expr
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// raise_stmt: 'raise' [test ['from' test]]
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DEF_RULE(del_stmt, c(del_stmt), and(2), tok(KW_DEL), rule(exprlist))
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DEF_RULE(pass_stmt, c(generic_all_nodes), and(1), tok(KW_PASS))
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DEF_RULE(flow_stmt, nc, or(5), rule(break_stmt), rule(continue_stmt), rule(return_stmt), rule(raise_stmt), rule(yield_stmt))
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DEF_RULE(break_stmt, c(break_stmt), and(1), tok(KW_BREAK))
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DEF_RULE(continue_stmt, c(continue_stmt), and(1), tok(KW_CONTINUE))
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DEF_RULE(return_stmt, c(return_stmt), and(2), tok(KW_RETURN), opt_rule(testlist))
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DEF_RULE(yield_stmt, c(yield_stmt), and(1), rule(yield_expr))
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DEF_RULE(raise_stmt, c(raise_stmt), and(2), tok(KW_RAISE), opt_rule(raise_stmt_arg))
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DEF_RULE(raise_stmt_arg, nc, and(2), rule(test), opt_rule(raise_stmt_from))
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DEF_RULE(raise_stmt_from, nc, ident | and(2), tok(KW_FROM), rule(test))
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// import_stmt: import_name | import_from
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// import_name: 'import' dotted_as_names
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// import_from: 'from' (('.' | '...')* dotted_name | ('.' | '...')+) 'import' ('*' | '(' import_as_names ')' | import_as_names)
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// import_as_name: NAME ['as' NAME]
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// dotted_as_name: dotted_name ['as' NAME]
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// import_as_names: import_as_name (',' import_as_name)* [',']
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// dotted_as_names: dotted_as_name (',' dotted_as_name)*
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// dotted_name: NAME ('.' NAME)*
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// global_stmt: 'global' NAME (',' NAME)*
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// nonlocal_stmt: 'nonlocal' NAME (',' NAME)*
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// assert_stmt: 'assert' test [',' test]
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DEF_RULE(import_stmt, nc, or(2), rule(import_name), rule(import_from))
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DEF_RULE(import_name, c(import_name), and(2), tok(KW_IMPORT), rule(dotted_as_names))
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DEF_RULE(import_from, c(import_from), and(4), tok(KW_FROM), rule(import_from_2), tok(KW_IMPORT), rule(import_from_3))
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DEF_RULE(import_from_2, nc, or(2), rule(dotted_name), rule(import_from_2b))
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DEF_RULE(import_from_2b, nc, and(2), rule(one_or_more_period_or_ellipsis), opt_rule(dotted_name))
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DEF_RULE(import_from_3, nc, or(3), tok(OP_STAR), rule(import_as_names_paren), rule(import_as_names))
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DEF_RULE(import_as_names_paren, nc, ident | and(3), tok(DEL_PAREN_OPEN), rule(import_as_names), tok(DEL_PAREN_CLOSE))
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DEF_RULE(one_or_more_period_or_ellipsis, nc, one_or_more, rule(period_or_ellipsis))
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DEF_RULE(period_or_ellipsis, nc, or(2), tok(DEL_PERIOD), tok(ELLIPSIS))
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DEF_RULE(import_as_name, nc, and(2), tok(NAME), opt_rule(as_name))
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DEF_RULE(dotted_as_name, nc, and(2), rule(dotted_name), opt_rule(as_name))
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DEF_RULE(as_name, nc, ident | and(2), tok(KW_AS), tok(NAME))
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DEF_RULE(import_as_names, nc, list_with_end, rule(import_as_name), tok(DEL_COMMA))
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DEF_RULE(dotted_as_names, nc, list, rule(dotted_as_name), tok(DEL_COMMA))
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DEF_RULE(dotted_name, nc, list, tok(NAME), tok(DEL_PERIOD))
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DEF_RULE(global_stmt, c(global_stmt), and(2), tok(KW_GLOBAL), rule(name_list))
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DEF_RULE(nonlocal_stmt, c(nonlocal_stmt), and(2), tok(KW_NONLOCAL), rule(name_list))
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DEF_RULE(name_list, nc, list, tok(NAME), tok(DEL_COMMA))
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DEF_RULE(assert_stmt, c(assert_stmt), and(3), tok(KW_ASSERT), rule(test), opt_rule(assert_stmt_extra))
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DEF_RULE(assert_stmt_extra, nc, ident | and(2), tok(DEL_COMMA), rule(test))
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// compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | with_stmt | funcdef | classdef | decorated
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// if_stmt: 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite]
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// while_stmt: 'while' test ':' suite ['else' ':' suite]
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// for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite]
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// try_stmt: 'try' ':' suite ((except_clause ':' suite)+ ['else' ':' suite] ['finally' ':' suite] | 'finally' ':' suite)
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// # NB compile.c makes sure that the default except clause is last
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// except_clause: 'except' [test ['as' NAME]]
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// with_stmt: 'with' with_item (',' with_item)* ':' suite
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// with_item: test ['as' expr]
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// suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT
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DEF_RULE(compound_stmt, nc, or(8), rule(if_stmt), rule(while_stmt), rule(for_stmt), rule(try_stmt), rule(with_stmt), rule(funcdef), rule(classdef), rule(decorated))
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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))
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DEF_RULE(if_stmt_elif_list, nc, one_or_more, rule(if_stmt_elif))
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DEF_RULE(if_stmt_elif, nc, and(4), tok(KW_ELIF), rule(test), tok(DEL_COLON), rule(suite))
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DEF_RULE(while_stmt, c(while_stmt), and(5), tok(KW_WHILE), rule(test), tok(DEL_COLON), rule(suite), opt_rule(else_stmt))
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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))
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DEF_RULE(try_stmt, c(try_stmt), and(4), tok(KW_TRY), tok(DEL_COLON), rule(suite), rule(try_stmt_2))
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DEF_RULE(try_stmt_2, nc, or(2), rule(try_stmt_except_and_more), rule(try_stmt_finally))
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DEF_RULE(try_stmt_except_and_more, nc, and(3), rule(try_stmt_except_list), opt_rule(else_stmt), opt_rule(try_stmt_finally))
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DEF_RULE(try_stmt_except, nc, and(4), tok(KW_EXCEPT), opt_rule(try_stmt_as_name), tok(DEL_COLON), rule(suite))
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DEF_RULE(try_stmt_as_name, nc, and(2), rule(test), opt_rule(as_name))
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DEF_RULE(try_stmt_except_list, nc, one_or_more, rule(try_stmt_except))
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DEF_RULE(try_stmt_finally, nc, and(3), tok(KW_FINALLY), tok(DEL_COLON), rule(suite))
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DEF_RULE(else_stmt, nc, ident | and(3), tok(KW_ELSE), tok(DEL_COLON), rule(suite))
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DEF_RULE(with_stmt, c(with_stmt), and(4), tok(KW_WITH), rule(with_stmt_list), tok(DEL_COLON), rule(suite))
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DEF_RULE(with_stmt_list, nc, list, rule(with_item), tok(DEL_COMMA))
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DEF_RULE(with_item, nc, and(2), rule(test), opt_rule(with_item_as))
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DEF_RULE(with_item_as, nc, ident | and(2), tok(KW_AS), rule(expr))
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DEF_RULE(suite, nc, or(2), rule(suite_block), rule(simple_stmt))
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DEF_RULE(suite_block, nc, and(4), tok(NEWLINE), tok(INDENT), rule(suite_block_stmts), tok(DEDENT))
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DEF_RULE(suite_block_stmts, c(generic_all_nodes), one_or_more, rule(stmt))
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// test: or_test ['if' or_test 'else' test] | lambdef
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// test_nocond: or_test | lambdef_nocond
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// lambdef: 'lambda' [varargslist] ':' test
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// lambdef_nocond: 'lambda' [varargslist] ':' test_nocond
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DEF_RULE(test, nc, or(2), rule(lambdef), rule(test_if_expr))
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DEF_RULE(test_if_expr, c(test_if_expr), and(2), rule(or_test), opt_rule(test_if_else))
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DEF_RULE(test_if_else, nc, and(4), tok(KW_IF), rule(or_test), tok(KW_ELSE), rule(test))
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DEF_RULE(test_nocond, nc, or(2), rule(lambdef_nocond), rule(or_test))
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DEF_RULE(lambdef, c(lambdef), blank | and(4), tok(KW_LAMBDA), opt_rule(varargslist), tok(DEL_COLON), rule(test))
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DEF_RULE(lambdef_nocond, c(lambdef), blank | and(4), tok(KW_LAMBDA), opt_rule(varargslist), tok(DEL_COLON), rule(test_nocond))
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// or_test: and_test ('or' and_test)*
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// and_test: not_test ('and' not_test)*
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// not_test: 'not' not_test | comparison
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// comparison: expr (comp_op expr)*
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// comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is'|'is' 'not'
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// star_expr: '*' expr
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// expr: xor_expr ('|' xor_expr)*
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// xor_expr: and_expr ('^' and_expr)*
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// and_expr: shift_expr ('&' shift_expr)*
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// shift_expr: arith_expr (('<<'|'>>') arith_expr)*
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// arith_expr: term (('+'|'-') term)*
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// term: factor (('*'|'/'|'%'|'//') factor)*
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// factor: ('+'|'-'|'~') factor | power
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// power: atom trailer* ['**' factor]
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DEF_RULE(or_test, c(or_test), list, rule(and_test), tok(KW_OR))
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DEF_RULE(and_test, c(and_test), list, rule(not_test), tok(KW_AND))
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DEF_RULE(not_test, nc, or(2), rule(not_test_2), rule(comparison))
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DEF_RULE(not_test_2, c(not_test_2), and(2), tok(KW_NOT), rule(not_test))
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DEF_RULE(comparison, c(comparison), list, rule(expr), rule(comp_op))
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DEF_RULE(comp_op, nc, 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))
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DEF_RULE(comp_op_not_in, nc, and(2), tok(KW_NOT), tok(KW_IN))
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DEF_RULE(comp_op_is, nc, and(2), tok(KW_IS), opt_rule(comp_op_is_not))
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DEF_RULE(comp_op_is_not, nc, and(1), tok(KW_NOT))
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DEF_RULE(star_expr, c(star_expr), and(2), tok(OP_STAR), rule(expr))
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DEF_RULE(expr, c(expr), list, rule(xor_expr), tok(OP_PIPE))
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DEF_RULE(xor_expr, c(xor_expr), list, rule(and_expr), tok(OP_CARET))
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DEF_RULE(and_expr, c(and_expr), list, rule(shift_expr), tok(OP_AMPERSAND))
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DEF_RULE(shift_expr, c(shift_expr), list, rule(arith_expr), rule(shift_op))
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DEF_RULE(shift_op, nc, or(2), tok(OP_DBL_LESS), tok(OP_DBL_MORE))
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DEF_RULE(arith_expr, c(arith_expr), list, rule(term), rule(arith_op))
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DEF_RULE(arith_op, nc, or(2), tok(OP_PLUS), tok(OP_MINUS))
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DEF_RULE(term, c(term), list, rule(factor), rule(term_op))
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DEF_RULE(term_op, nc, or(4), tok(OP_STAR), tok(OP_SLASH), tok(OP_PERCENT), tok(OP_DBL_SLASH))
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DEF_RULE(factor, nc, or(2), rule(factor_2), rule(power))
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DEF_RULE(factor_2, c(factor_2), and(2), rule(factor_op), rule(factor))
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DEF_RULE(factor_op, nc, or(3), tok(OP_PLUS), tok(OP_MINUS), tok(OP_TILDE))
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DEF_RULE(power, c(power), and(3), rule(atom), opt_rule(power_trailers), opt_rule(power_dbl_star))
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DEF_RULE(power_trailers, c(power_trailers), one_or_more, rule(trailer))
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DEF_RULE(power_dbl_star, c(power_dbl_star), and(2), tok(OP_DBL_STAR), rule(factor))
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// atom: '(' [yield_expr|testlist_comp] ')' | '[' [testlist_comp] ']' | '{' [dictorsetmaker] '}' | NAME | NUMBER | STRING+ | '...' | 'None' | 'True' | 'False'
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// testlist_comp: (test|star_expr) ( comp_for | (',' (test|star_expr))* [','] )
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// trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME
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DEF_RULE(atom, nc, or(11), tok(NAME), tok(INTEGER), tok(FLOAT_OR_IMAG), rule(atom_string), tok(ELLIPSIS), tok(KW_NONE), tok(KW_TRUE), tok(KW_FALSE), rule(atom_paren), rule(atom_bracket), rule(atom_brace))
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DEF_RULE(atom_string, c(atom_string), one_or_more, rule(string_or_bytes))
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DEF_RULE(string_or_bytes, nc, or(2), tok(STRING), tok(BYTES))
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DEF_RULE(atom_paren, c(atom_paren), and(3), tok(DEL_PAREN_OPEN), opt_rule(atom_2b), tok(DEL_PAREN_CLOSE))
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DEF_RULE(atom_2b, nc, or(2), rule(yield_expr), rule(testlist_comp))
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DEF_RULE(atom_bracket, c(atom_bracket), and(3), tok(DEL_BRACKET_OPEN), opt_rule(testlist_comp), tok(DEL_BRACKET_CLOSE))
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DEF_RULE(atom_brace, c(atom_brace), and(3), tok(DEL_BRACE_OPEN), opt_rule(dictorsetmaker), tok(DEL_BRACE_CLOSE))
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DEF_RULE(testlist_comp, nc, and(2), rule(testlist_comp_2), opt_rule(testlist_comp_3))
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DEF_RULE(testlist_comp_2, nc, or(2), rule(star_expr), rule(test))
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DEF_RULE(testlist_comp_3, nc, or(2), rule(comp_for), rule(testlist_comp_3b))
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DEF_RULE(testlist_comp_3b, nc, ident | and(2), tok(DEL_COMMA), opt_rule(testlist_comp_3c))
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DEF_RULE(testlist_comp_3c, nc, list_with_end, rule(testlist_comp_2), tok(DEL_COMMA))
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DEF_RULE(trailer, nc, or(3), rule(trailer_paren), rule(trailer_bracket), rule(trailer_period))
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DEF_RULE(trailer_paren, c(trailer_paren), and(3), tok(DEL_PAREN_OPEN), opt_rule(arglist), tok(DEL_PAREN_CLOSE))
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DEF_RULE(trailer_bracket, c(trailer_bracket), and(3), tok(DEL_BRACKET_OPEN), rule(subscriptlist), tok(DEL_BRACKET_CLOSE))
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DEF_RULE(trailer_period, c(trailer_period), and(2), tok(DEL_PERIOD), tok(NAME))
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// subscriptlist: subscript (',' subscript)* [',']
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// subscript: test | [test] ':' [test] [sliceop]
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// sliceop: ':' [test]
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#if MICROPY_PY_BUILTINS_SLICE
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DEF_RULE(subscriptlist, c(generic_tuple), list_with_end, rule(subscript), tok(DEL_COMMA))
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DEF_RULE(subscript, nc, or(2), rule(subscript_3), rule(subscript_2))
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DEF_RULE(subscript_2, c(subscript_2), and(2), rule(test), opt_rule(subscript_3))
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DEF_RULE(subscript_3, c(subscript_3), and(2), tok(DEL_COLON), opt_rule(subscript_3b))
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DEF_RULE(subscript_3b, nc, or(2), rule(subscript_3c), rule(subscript_3d))
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DEF_RULE(subscript_3c, nc, and(2), tok(DEL_COLON), opt_rule(test))
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DEF_RULE(subscript_3d, nc, and(2), rule(test), opt_rule(sliceop))
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DEF_RULE(sliceop, nc, and(2), tok(DEL_COLON), opt_rule(test))
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#else
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DEF_RULE(subscriptlist, c(generic_tuple), list_with_end, rule(test), tok(DEL_COMMA))
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#endif
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// exprlist: (expr|star_expr) (',' (expr|star_expr))* [',']
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// testlist: test (',' test)* [',']
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// dictorsetmaker: (test ':' test (comp_for | (',' test ':' test)* [','])) | (test (comp_for | (',' test)* [',']))
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DEF_RULE(exprlist, nc, list_with_end, rule(exprlist_2), tok(DEL_COMMA))
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DEF_RULE(exprlist_2, nc, or(2), rule(star_expr), rule(expr))
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DEF_RULE(testlist, c(generic_tuple), list_with_end, rule(test), tok(DEL_COMMA))
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// TODO dictorsetmaker lets through more than is allowed
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DEF_RULE(dictorsetmaker, nc, and(2), rule(dictorsetmaker_item), opt_rule(dictorsetmaker_tail))
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#if MICROPY_PY_BUILTINS_SET
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DEF_RULE(dictorsetmaker_item, c(dictorsetmaker_item), and(2), rule(test), opt_rule(dictorsetmaker_colon))
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DEF_RULE(dictorsetmaker_colon, nc, ident | and(2), tok(DEL_COLON), rule(test))
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#else
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DEF_RULE(dictorsetmaker_item, c(dictorsetmaker_item), and(3), rule(test), tok(DEL_COLON), rule(test))
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#endif
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DEF_RULE(dictorsetmaker_tail, nc, or(2), rule(comp_for), rule(dictorsetmaker_list))
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DEF_RULE(dictorsetmaker_list, nc, and(2), tok(DEL_COMMA), opt_rule(dictorsetmaker_list2))
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DEF_RULE(dictorsetmaker_list2, nc, list_with_end, rule(dictorsetmaker_item), tok(DEL_COMMA))
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// classdef: 'class' NAME ['(' [arglist] ')'] ':' suite
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DEF_RULE(classdef, c(classdef), blank | and(5), tok(KW_CLASS), tok(NAME), opt_rule(classdef_2), tok(DEL_COLON), rule(suite))
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DEF_RULE(classdef_2, nc, ident | and(3), tok(DEL_PAREN_OPEN), opt_rule(arglist), tok(DEL_PAREN_CLOSE))
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// arglist: (argument ',')* (argument [','] | '*' test (',' argument)* [',' '**' test] | '**' test)
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// TODO arglist lets through more than is allowed, compiler needs to do further verification
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DEF_RULE(arglist, nc, list_with_end, rule(arglist_2), tok(DEL_COMMA))
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DEF_RULE(arglist_2, nc, or(3), rule(arglist_star), rule(arglist_dbl_star), rule(argument))
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DEF_RULE(arglist_star, nc, and(2), tok(OP_STAR), rule(test))
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DEF_RULE(arglist_dbl_star, nc, and(2), tok(OP_DBL_STAR), rule(test))
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// # The reason that keywords are test nodes instead of NAME is that using NAME
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// # results in an ambiguity. ast.c makes sure it's a NAME.
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// argument: test [comp_for] | test '=' test # Really [keyword '='] test
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// comp_iter: comp_for | comp_if
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// comp_for: 'for' exprlist 'in' or_test [comp_iter]
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// comp_if: 'if' test_nocond [comp_iter]
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DEF_RULE(argument, nc, and(2), rule(test), opt_rule(argument_2))
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DEF_RULE(argument_2, nc, or(2), rule(comp_for), rule(argument_3))
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DEF_RULE(argument_3, nc, and(2), tok(DEL_EQUAL), rule(test))
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DEF_RULE(comp_iter, nc, or(2), rule(comp_for), rule(comp_if))
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DEF_RULE(comp_for, nc, blank | and(5), tok(KW_FOR), rule(exprlist), tok(KW_IN), rule(or_test), opt_rule(comp_iter))
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DEF_RULE(comp_if, nc, and(3), tok(KW_IF), rule(test_nocond), opt_rule(comp_iter))
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// # not used in grammar, but may appear in "node" passed from Parser to Compiler
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// encoding_decl: NAME
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// yield_expr: 'yield' [yield_arg]
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// yield_arg: 'from' test | testlist
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DEF_RULE(yield_expr, c(yield_expr), and(2), tok(KW_YIELD), opt_rule(yield_arg))
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DEF_RULE(yield_arg, nc, or(2), rule(yield_arg_from), rule(testlist))
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DEF_RULE(yield_arg_from, nc, and(2), tok(KW_FROM), rule(test))
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