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grammar.js
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grammar.js
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/// <reference types="tree-sitter-cli/dsl" />
// @ts-check
const PREC = {
COMMENT: -2,
CURLY_BLOCK: 1,
DO_BLOCK: -1,
AND: -2,
OR: -2,
NOT: 5,
DEFINED: 10,
ALIAS: 11,
ASSIGN: 15,
RESCUE: 16,
CONDITIONAL: 20,
RANGE: 25,
BOOLEAN_OR: 30,
BOOLEAN_AND: 35,
RELATIONAL: 40,
COMPARISON: 45,
BITWISE_OR: 50,
BITWISE_AND: 55,
CALL: 56,
SHIFT: 60,
ADDITIVE: 65,
MULTIPLICATIVE: 70,
UNARY_MINUS: 75,
EXPONENTIAL: 80,
COMPLEMENT: 85,
};
const IDENTIFIER_CHARS = /[^\x00-\x1F\s:;`"'@$#.,|^&<=>+\-*/\\%?!~()\[\]{}]*/;
const LOWER_ALPHA_CHAR = /[^\x00-\x1F\sA-Z0-9:;`"'@$#.,|^&<=>+\-*/\\%?!~()\[\]{}]/;
const ALPHA_CHAR = /[^\x00-\x1F\s0-9:;`"'@$#.,|^&<=>+\-*/\\%?!~()\[\]{}]/;
module.exports = grammar({
name: 'ruby',
inline: $ => [$._arg_rhs, $._call_operator],
externals: $ => [
$._line_break,
$._no_line_break,
// Delimited literals
$.simple_symbol,
$._string_start,
$._symbol_start,
$._subshell_start,
$._regex_start,
$._string_array_start,
$._symbol_array_start,
$._heredoc_body_start,
$.string_content,
$.heredoc_content,
$._string_end,
$.heredoc_end,
$.heredoc_beginning,
// Tokens that require lookahead
'/',
$._block_ampersand,
$._splat_star,
$._unary_minus,
$._unary_minus_num,
$._binary_minus,
$._binary_star,
$._singleton_class_left_angle_left_langle,
$.hash_key_symbol,
$._identifier_suffix,
$._constant_suffix,
$._hash_splat_star_star,
$._binary_star_star,
$._element_reference_bracket,
$._short_interpolation,
],
extras: $ => [
$.comment,
$.heredoc_body,
/\s/,
/\\\r?\n/,
],
word: $ => $.identifier,
supertypes: $ => [
$._statement,
$._arg,
$._call_operator,
$._method_name,
$._expression,
$._variable,
$._primary,
$._simple_numeric,
$._lhs,
$._nonlocal_variable,
$._pattern_top_expr_body,
$._pattern_expr,
$._pattern_expr_basic,
$._pattern_primitive,
$._pattern_constant,
],
rules: {
program: $ => seq(
optional($._statements),
optional(
choice(
seq(/__END__/, $.uninterpreted),
),
),
),
uninterpreted: _ => /(.|\s)*/,
block_body: $ => $._statements,
_statements: $ => choice(
seq(
repeat1(choice(
seq($._statement, $._terminator),
$.empty_statement,
)),
optional($._statement),
),
$._statement,
),
begin_block: $ => seq('BEGIN', '{', optional($._statements), '}'),
end_block: $ => seq('END', '{', optional($._statements), '}'),
_statement: $ => choice(
$.undef,
$.alias,
$.if_modifier,
$.unless_modifier,
$.while_modifier,
$.until_modifier,
$.rescue_modifier,
$.begin_block,
$.end_block,
$._expression,
),
method: $ => seq('def', $._method_rest),
singleton_method: $ => seq(
'def',
seq(
choice(
field('object', $._variable),
seq('(', field('object', $._arg), ')'),
),
choice('.', '::'),
),
$._method_rest,
),
_method_rest: $ => seq(
field('name', $._method_name),
choice(
$._body_expr,
seq(
field('parameters', alias($.parameters, $.method_parameters)),
choice(
seq(optional($._terminator), optional(field('body', $.body_statement)), 'end'),
$._body_expr,
),
),
seq(
optional(
field('parameters', alias($.bare_parameters, $.method_parameters)),
),
$._terminator,
optional(field('body', $.body_statement)),
'end',
),
),
),
rescue_modifier_arg: $ => prec(PREC.RESCUE,
seq(
field('body', $._arg),
'rescue',
field('handler', $._arg),
),
),
rescue_modifier_expression: $ => prec(PREC.RESCUE,
seq(
field('body', $._expression),
'rescue',
field('handler', $._arg),
),
),
_body_expr: $ =>
seq(
'=',
field('body',
choice(
$._arg,
alias($.rescue_modifier_arg, $.rescue_modifier),
)),
),
parameters: $ => seq(
'(',
commaSep($._formal_parameter),
')',
),
bare_parameters: $ => seq(
$._simple_formal_parameter,
repeat(seq(',', $._formal_parameter)),
),
block_parameters: $ => seq(
'|',
seq(commaSep($._formal_parameter), optional(',')),
optional(seq(';', sep1(field('locals', $.identifier), ','))), // Block shadow args e.g. {|; a, b| ...}
'|',
),
_formal_parameter: $ => choice(
$._simple_formal_parameter,
alias($.parameters, $.destructured_parameter),
),
_simple_formal_parameter: $ => choice(
$.identifier,
$.splat_parameter,
$.hash_splat_parameter,
$.hash_splat_nil,
$.forward_parameter,
$.block_parameter,
$.keyword_parameter,
$.optional_parameter,
),
forward_parameter: _ => '...',
splat_parameter: $ => prec.right(-2, seq(
'*',
field('name', optional($.identifier)),
)),
hash_splat_parameter: $ => seq(
'**',
field('name', optional($.identifier)),
),
hash_splat_nil: _ => seq('**', 'nil'),
block_parameter: $ => seq(
'&',
field('name', optional($.identifier)),
),
keyword_parameter: $ => prec.right(PREC.BITWISE_OR + 1, seq(
field('name', $.identifier),
token.immediate(':'),
field('value', optional($._arg)),
)),
optional_parameter: $ => prec(PREC.BITWISE_OR + 1, seq(
field('name', $.identifier),
'=',
field('value', $._arg),
)),
class: $ => seq(
'class',
field('name', choice($.constant, $.scope_resolution)),
choice(
seq(field('superclass', $.superclass), $._terminator),
optional($._terminator),
),
optional(field('body', $.body_statement)),
'end',
),
superclass: $ => seq('<', $._expression),
singleton_class: $ => seq(
'class',
alias($._singleton_class_left_angle_left_langle, '<<'),
field('value', $._arg),
$._terminator,
optional(field('body', $.body_statement)),
'end',
),
module: $ => seq(
'module',
field('name', choice($.constant, $.scope_resolution)),
optional($._terminator),
optional(field('body', $.body_statement)),
'end',
),
return_command: $ => prec.left(seq('return', alias($.command_argument_list, $.argument_list))),
yield_command: $ => prec.left(seq('yield', alias($.command_argument_list, $.argument_list))),
break_command: $ => prec.left(seq('break', alias($.command_argument_list, $.argument_list))),
next_command: $ => prec.left(seq('next', alias($.command_argument_list, $.argument_list))),
return: $ => prec.left(seq('return', optional($.argument_list))),
yield: $ => prec.left(seq('yield', optional($.argument_list))),
break: $ => prec.left(seq('break', optional($.argument_list))),
next: $ => prec.left(seq('next', optional($.argument_list))),
redo: $ => prec.left(seq('redo', optional($.argument_list))),
retry: $ => prec.left(seq('retry', optional($.argument_list))),
if_modifier: $ => prec(PREC.RESCUE, seq(
field('body', $._statement),
'if',
field('condition', $._expression),
)),
unless_modifier: $ => prec(PREC.RESCUE, seq(
field('body', $._statement),
'unless',
field('condition', $._expression),
)),
while_modifier: $ => prec(PREC.RESCUE, seq(
field('body', $._statement),
'while',
field('condition', $._expression),
)),
until_modifier: $ => prec(PREC.RESCUE, seq(
field('body', $._statement),
'until',
field('condition', $._expression),
)),
rescue_modifier: $ => prec(PREC.RESCUE, seq(
field('body', $._statement),
'rescue',
field('handler', $._expression),
)),
while: $ => seq(
'while',
field('condition', $._statement),
field('body', $.do),
),
until: $ => seq(
'until',
field('condition', $._statement),
field('body', $.do),
),
for: $ => seq(
'for',
field('pattern', choice($._lhs, $.left_assignment_list)),
field('value', $.in),
field('body', $.do),
),
in: $ => seq('in', $._arg),
do: $ => seq(
choice('do', $._terminator),
optional($._statements),
'end',
),
case: $ => seq(
'case',
optional(seq(optional($._line_break), field('value', $._statement))),
optional($._terminator),
repeat($.when),
optional($.else),
'end',
),
case_match: $ => seq(
'case',
seq(optional($._line_break), field('value', $._statement)),
optional($._terminator),
repeat1(field('clauses', $.in_clause)),
optional(field('else', $.else)),
'end',
),
when: $ => seq(
'when',
commaSep1(field('pattern', $.pattern)),
choice($._terminator, field('body', $.then)),
),
in_clause: $ => seq(
'in',
field('pattern', $._pattern_top_expr_body),
field('guard', optional($._guard)),
choice($._terminator, field('body', $.then)),
),
pattern: $ => choice($._arg, $.splat_argument),
_guard: $ => choice(
$.if_guard,
$.unless_guard,
),
if_guard: $ => seq(
'if',
field('condition', $._expression),
),
unless_guard: $ => seq(
'unless',
field('condition', $._expression),
),
_pattern_top_expr_body: $ => prec(-1, choice(
$._pattern_expr,
alias($._array_pattern_n, $.array_pattern),
alias($._find_pattern_body, $.find_pattern),
alias($._hash_pattern_body, $.hash_pattern),
)),
_array_pattern_n: $ => prec.right(choice(
seq($._pattern_expr, alias(',', $.splat_parameter)),
seq($._pattern_expr, ',', choice($._pattern_expr, $._array_pattern_n)),
seq($.splat_parameter, repeat(seq(',', $._pattern_expr))),
)),
_pattern_expr: $ => choice(
$.as_pattern,
$._pattern_expr_alt,
),
as_pattern: $ => seq(field('value', $._pattern_expr), '=>', field('name', $.identifier)),
_pattern_expr_alt: $ => choice(
$.alternative_pattern,
$._pattern_expr_basic,
),
alternative_pattern: $ => seq(field('alternatives', $._pattern_expr_basic), repeat1(seq('|', field('alternatives', $._pattern_expr_basic)))),
_array_pattern_body: $ => choice(
$._pattern_expr,
$._array_pattern_n,
),
array_pattern: $ => prec.right(-1, choice(
seq('[', optional($._array_pattern_body), ']'),
seq(field('class', $._pattern_constant), token.immediate('['), optional($._array_pattern_body), ']'),
seq(field('class', $._pattern_constant), token.immediate('('), optional($._array_pattern_body), ')'),
)),
_find_pattern_body: $ => seq($.splat_parameter, repeat1(seq(',', $._pattern_expr)), ',', $.splat_parameter),
find_pattern: $ => choice(
seq('[', $._find_pattern_body, ']'),
seq(field('class', $._pattern_constant), token.immediate('['), $._find_pattern_body, ']'),
seq(field('class', $._pattern_constant), token.immediate('('), $._find_pattern_body, ')'),
),
_hash_pattern_body: $ => prec.right(choice(
seq(commaSep1($.keyword_pattern), optional(',')),
seq(commaSep1($.keyword_pattern), ',', $._hash_pattern_any_rest),
$._hash_pattern_any_rest,
)),
keyword_pattern: $ => prec.right(-1, seq(
field('key',
choice(
alias($.identifier, $.hash_key_symbol),
alias($.constant, $.hash_key_symbol),
alias($.identifier_suffix, $.hash_key_symbol),
alias($.constant_suffix, $.hash_key_symbol),
$.string,
),
),
token.immediate(':'),
optional(field('value', $._pattern_expr)),
)),
_hash_pattern_any_rest: $ => choice($.hash_splat_parameter, $.hash_splat_nil),
hash_pattern: $ => prec.right(-1, choice(
seq('{', optional($._hash_pattern_body), '}'),
seq(field('class', $._pattern_constant), token.immediate('['), $._hash_pattern_body, ']'),
seq(field('class', $._pattern_constant), token.immediate('('), $._hash_pattern_body, ')'),
)),
_pattern_expr_basic: $ => prec.right(-1, choice(
$._pattern_value,
$.identifier,
$.array_pattern,
$.find_pattern,
$.hash_pattern,
$.parenthesized_pattern,
)),
parenthesized_pattern: $ => seq('(', $._pattern_expr, ')'),
_pattern_value: $ => prec.right(-1, choice(
$._pattern_primitive,
alias($._pattern_range, $.range),
$.variable_reference_pattern,
$.expression_reference_pattern,
$._pattern_constant,
)),
_pattern_range: $ => {
const begin = field('begin', $._pattern_primitive);
const end = field('end', $._pattern_primitive);
const operator = field('operator', choice('..', '...'));
return choice(
seq(begin, operator, end),
seq(operator, end),
seq(begin, operator),
);
},
_pattern_primitive: $ => choice(
$._pattern_literal,
$._pattern_lambda,
),
_pattern_lambda: $ => prec.right(-1, $.lambda),
_pattern_literal: $ => prec.right(-1, choice(
$._literal,
$.string,
$.subshell,
$.heredoc_beginning,
$.regex,
$.string_array,
$.symbol_array,
$._keyword_variable,
)),
_keyword_variable: $ => prec.right(-1, choice(
$.nil,
$.self,
$.true,
$.false,
$.line,
$.file,
$.encoding,
)),
line: _ => '__LINE__',
file: _ => '__FILE__',
encoding: _ => '__ENCODING__',
variable_reference_pattern: $ => seq('^', field('name', choice($.identifier, $._nonlocal_variable))),
expression_reference_pattern: $ => seq('^', '(', field('value', $._expression), ')'),
_pattern_constant: $ => prec.right(-1, choice(
$.constant,
alias($._pattern_constant_resolution, $.scope_resolution),
)),
_pattern_constant_resolution: $ => seq(
optional(field('scope', $._pattern_constant)),
'::',
field('name', $.constant),
),
if: $ => seq(
'if',
field('condition', $._statement),
choice($._terminator, field('consequence', $.then)),
field('alternative', optional(choice($.else, $.elsif))),
'end',
),
unless: $ => seq(
'unless',
field('condition', $._statement),
choice($._terminator, field('consequence', $.then)),
field('alternative', optional(choice($.else, $.elsif))),
'end',
),
elsif: $ => seq(
'elsif',
field('condition', $._statement),
choice($._terminator, field('consequence', $.then)),
field('alternative', optional(choice($.else, $.elsif))),
),
else: $ => seq(
'else',
optional($._terminator),
optional($._statements),
),
then: $ => choice(
seq(
$._terminator,
$._statements,
),
seq(
optional($._terminator),
'then',
optional($._statements),
),
),
begin: $ => seq('begin', optional($._terminator), optional($._body_statement), 'end'),
ensure: $ => seq('ensure', optional($._statements)),
rescue: $ => seq(
'rescue',
field('exceptions', optional($.exceptions)),
field('variable', optional($.exception_variable)),
choice(
$._terminator,
field('body', $.then),
),
),
exceptions: $ => commaSep1(choice($._arg, $.splat_argument)),
exception_variable: $ => seq('=>', $._lhs),
body_statement: $ => $._body_statement,
_body_statement: $ => choice(
seq($._statements, repeat(choice($.rescue, $.else, $.ensure))),
seq(optional($._statements), repeat1(choice($.rescue, $.else, $.ensure))),
),
// Method calls without parentheses (aka "command calls") are only allowed
// in certain positions, like the top-level of a statement, the condition
// of a postfix control-flow operator like `if`, or as the value of a
// control-flow statement like `return`. In many other places, they're not
// allowed.
//
// Because of this distinction, a lot of rules have two variants: the
// normal variant, which can appear anywhere that an expression is valid,
// and the "command" varaint, which is only valid in a more limited set of
// positions, because it can contain "command calls".
//
// The `_expression` rule can appear in relatively few places, but can
// contain command calls. The `_arg` rule can appear in many more places,
// but cannot contain command calls (unless they are wrapped in parens).
// This naming convention is based on Ruby's standard grammar.
_expression: $ => choice(
alias($.command_binary, $.binary),
alias($.command_unary, $.unary),
alias($.command_assignment, $.assignment),
alias($.command_operator_assignment, $.operator_assignment),
alias($.command_call, $.call),
alias($.command_call_with_block, $.call),
prec.left(alias($._chained_command_call, $.call)),
alias($.return_command, $.return),
alias($.yield_command, $.yield),
alias($.break_command, $.break),
alias($.next_command, $.next),
$.match_pattern,
$.test_pattern,
$._arg,
),
match_pattern: $ => prec(100, seq(field('value', $._arg), '=>', field('pattern', $._pattern_top_expr_body))),
test_pattern: $ => prec(100, seq(field('value', $._arg), 'in', field('pattern', $._pattern_top_expr_body))),
_arg: $ => choice(
alias($._unary_minus_pow, $.unary),
$._primary,
$.assignment,
$.operator_assignment,
$.conditional,
$.range,
$.binary,
$.unary,
),
_unary_minus_pow: $ => seq(field('operator', alias($._unary_minus_num, '-')), field('operand', alias($._pow, $.binary))),
_pow: $ => prec.right(PREC.EXPONENTIAL, seq(field('left', $._simple_numeric), field('operator', alias($._binary_star_star, '**')), field('right', $._arg))),
_primary: $ => choice(
$.parenthesized_statements,
$._lhs,
alias($._function_identifier_call, $.call),
$.call,
$.array,
$.string_array,
$.symbol_array,
$.hash,
$.subshell,
$._literal,
$.string,
$.character,
$.chained_string,
$.regex,
$.lambda,
$.method,
$.singleton_method,
$.class,
$.singleton_class,
$.module,
$.begin,
$.while,
$.until,
$.if,
$.unless,
$.for,
$.case,
$.case_match,
$.return,
$.yield,
$.break,
$.next,
$.redo,
$.retry,
alias($.parenthesized_unary, $.unary),
$.heredoc_beginning,
),
parenthesized_statements: $ => seq('(', optional($._statements), ')'),
element_reference: $ => prec.left(1, seq(
field('object', $._primary),
alias($._element_reference_bracket, '['),
optional($._argument_list_with_trailing_comma),
']',
optional(field('block', choice($.block, $.do_block))),
)),
scope_resolution: $ => prec.left(PREC.CALL + 1, seq(
choice(
'::',
seq(field('scope', $._primary), token.immediate('::')),
),
field('name', $.constant),
)),
_call_operator: _ => choice('.', '&.', token.immediate('::')),
_call: $ => prec.left(PREC.CALL, seq(
field('receiver', $._primary),
field('operator', $._call_operator),
field('method', choice($.identifier, $.operator, $.constant, $._function_identifier)),
)),
command_call: $ => seq(
choice(
$._call,
$._chained_command_call,
field('method', choice(
$._variable,
$._function_identifier,
)),
),
field('arguments', alias($.command_argument_list, $.argument_list)),
),
command_call_with_block: $ => {
const receiver = choice(
$._call,
field('method', choice($._variable, $._function_identifier)),
);
const args = field('arguments', alias($.command_argument_list, $.argument_list));
const block = field('block', $.block);
const doBlock = field('block', $.do_block);
return choice(
seq(receiver, prec(PREC.CURLY_BLOCK, seq(args, block))),
seq(receiver, prec(PREC.DO_BLOCK, seq(args, doBlock))),
);
},
_chained_command_call: $ => seq(
field('receiver', alias($.command_call_with_block, $.call)),
field('operator', $._call_operator),
field('method', choice($.identifier, $._function_identifier, $.operator, $.constant)),
),
call: $ => {
const receiver = choice(
$._call,
field('method', choice(
$._variable, $._function_identifier,
)),
);
const args = field('arguments', $.argument_list);
const receiverArguments =
seq(
choice(
receiver,
prec.left(PREC.CALL, seq(
field('receiver', $._primary),
field('operator', $._call_operator),
)),
),
args,
);
const block = field('block', $.block);
const doBlock = field('block', $.do_block);
return choice(
receiverArguments,
prec(PREC.CURLY_BLOCK, seq(receiverArguments, block)),
prec(PREC.DO_BLOCK, seq(receiverArguments, doBlock)),
prec(PREC.CURLY_BLOCK, seq(receiver, block)),
prec(PREC.DO_BLOCK, seq(receiver, doBlock)),
);
},
command_argument_list: $ => prec.right(commaSep1($._argument)),
argument_list: $ => prec.right(seq(
token.immediate('('),
optional($._argument_list_with_trailing_comma),
')',
)),
_argument_list_with_trailing_comma: $ => prec.right(seq(
commaSep1($._argument),
optional(','),
)),
_argument: $ => prec.left(choice(
$._expression,
$.splat_argument,
$.hash_splat_argument,
$.forward_argument,
$.block_argument,
$.pair,
)),
forward_argument: _ => '...',
splat_argument: $ => prec.right(seq(alias($._splat_star, '*'), optional($._arg))),
hash_splat_argument: $ => prec.right(seq(alias($._hash_splat_star_star, '**'), optional($._arg))),
block_argument: $ => prec.right(seq(alias($._block_ampersand, '&'), optional($._arg))),
do_block: $ => seq(
'do',
optional($._terminator),
optional(seq(
field('parameters', $.block_parameters),
optional($._terminator),
)),
optional(field('body', $.body_statement)),
'end',
),
block: $ => prec(PREC.CURLY_BLOCK, seq(
'{',
field('parameters', optional($.block_parameters)),
optional(field('body', $.block_body)),
'}',
)),
_arg_rhs: $ => choice($._arg, alias($.rescue_modifier_arg, $.rescue_modifier)),
assignment: $ => prec.right(PREC.ASSIGN, choice(
seq(
field('left', choice($._lhs, $.left_assignment_list)),
'=',
field('right', choice(
$._arg_rhs,
$.splat_argument,
$.right_assignment_list,
)),
),
)),
command_assignment: $ => prec.right(PREC.ASSIGN,
seq(
field('left', choice($._lhs, $.left_assignment_list)),
'=',
field('right', choice($._expression, alias($.rescue_modifier_expression, $.rescue_modifier))),
),
),
operator_assignment: $ => prec.right(PREC.ASSIGN, seq(
field('left', $._lhs),
field('operator', choice('+=', '-=', '*=', '**=', '/=', '||=', '|=', '&&=', '&=', '%=', '>>=', '<<=', '^=')),
field('right', $._arg_rhs),
)),
command_operator_assignment: $ => prec.right(PREC.ASSIGN, seq(
field('left', $._lhs),
field('operator', choice('+=', '-=', '*=', '**=', '/=', '||=', '|=', '&&=', '&=', '%=', '>>=', '<<=', '^=')),
field('right', choice($._expression, alias($.rescue_modifier_expression, $.rescue_modifier))),
)),
conditional: $ => prec.right(PREC.CONDITIONAL, seq(
field('condition', $._arg),
'?',
field('consequence', $._arg),
':',
field('alternative', $._arg),
)),
range: $ => {
const begin = field('begin', $._arg);
const end = field('end', $._arg);
const operator = field('operator', choice('..', '...'));
return prec.right(PREC.RANGE, choice(
seq(begin, operator, end),
seq(operator, end),
seq(begin, operator),
));
},
binary: $ => {
const operators = [
[prec.left, PREC.AND, 'and'],
[prec.left, PREC.OR, 'or'],
[prec.left, PREC.BOOLEAN_OR, '||'],
[prec.left, PREC.BOOLEAN_AND, '&&'],
[prec.left, PREC.SHIFT, choice('<<', '>>')],
[prec.left, PREC.COMPARISON, choice('<', '<=', '>', '>=')],
[prec.left, PREC.BITWISE_AND, '&'],
[prec.left, PREC.BITWISE_OR, choice('^', '|')],
[prec.left, PREC.ADDITIVE, choice('+', alias($._binary_minus, '-'))],
[prec.left, PREC.MULTIPLICATIVE, choice('/', '%', alias($._binary_star, '*'))],
[prec.right, PREC.RELATIONAL, choice('==', '!=', '===', '<=>', '=~', '!~')],
[prec.right, PREC.EXPONENTIAL, alias($._binary_star_star, '**')],
];
// @ts-ignore
return choice(...operators.map(([fn, precedence, operator]) => fn(precedence, seq(
field('left', $._arg),
// @ts-ignore
field('operator', operator),
field('right', $._arg),
))));
},
command_binary: $ => prec.left(seq(
field('left', $._expression),
field('operator', choice('or', 'and')),
field('right', $._expression),
)),
unary: $ => {
const operators = [
[prec, PREC.DEFINED, 'defined?'],
[prec.right, PREC.NOT, 'not'],
[prec.right, PREC.UNARY_MINUS, choice(alias($._unary_minus, '-'), alias($._binary_minus, '-'), '+')],
[prec.right, PREC.COMPLEMENT, choice('!', '~')],
];
// @ts-ignore
return choice(...operators.map(([fn, precedence, operator]) => fn(precedence, seq(
// @ts-ignore
field('operator', operator),
field('operand', $._arg),
))));
},
command_unary: $ => {
const operators = [
[prec, PREC.DEFINED, 'defined?'],
[prec.right, PREC.NOT, 'not'],
[prec.right, PREC.UNARY_MINUS, choice(alias($._unary_minus, '-'), '+')],
[prec.right, PREC.COMPLEMENT, choice('!', '~')],
];
// @ts-ignore
return choice(...operators.map(([fn, precedence, operator]) => fn(precedence, seq(
// @ts-ignore
field('operator', operator),
field('operand', $._expression),
))));
},
parenthesized_unary: $ => prec(PREC.CALL, seq(
field('operator', choice('defined?', 'not')),
field('operand', $.parenthesized_statements),
)),
unary_literal: $ => prec.right(PREC.UNARY_MINUS, seq(
field('operator', choice(alias($._unary_minus_num, '-'), '+')),
field('operand', $._simple_numeric),
)),
_literal: $ => choice(
$.simple_symbol,
$.delimited_symbol,
$._numeric,
),
_numeric: $ => choice(
$._simple_numeric,
alias($.unary_literal, $.unary),
),
_simple_numeric: $ =>
choice(
$.integer,
$.float,
$.complex,
$.rational,
),
right_assignment_list: $ => prec(-1, commaSep1(choice($._arg, $.splat_argument))),
left_assignment_list: $ => $._mlhs,
_mlhs: $ => prec.left(-1, seq(
commaSep1(choice($._lhs, $.rest_assignment, $.destructured_left_assignment)),
optional(','),