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grammar.js
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/*
* MIT License
*
* Copyright (c) 2019 fwcd
*
* 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.
*/
// Using an adapted version of https://kotlinlang.org/docs/reference/grammar.html
const PREC = {
POSTFIX: 16,
PREFIX: 15,
TYPE_RHS: 14,
AS: 13,
MULTIPLICATIVE: 12,
ADDITIVE: 11,
RANGE: 10,
INFIX: 9,
ELVIS: 8,
CHECK: 7,
COMPARISON: 6,
EQUALITY: 5,
CONJUNCTION: 4,
DISJUNCTION: 3,
SPREAD: 2,
SIMPLE_USER_TYPE: 2,
VAR_DECL: 1,
ASSIGNMENT: 1,
BLOCK: 1,
LAMBDA_LITERAL: 0,
RETURN_OR_THROW: 0,
COMMENT: 0
};
const DEC_DIGITS = token(sep1(/[0-9]+/, /_+/));
const HEX_DIGITS = token(sep1(/[0-9a-fA-F]+/, /_+/));
const BIN_DIGITS = token(sep1(/[01]/, /_+/));
const REAL_EXPONENT = token(seq(/[eE]/, optional(/[+-]/), DEC_DIGITS))
module.exports = grammar({
name: "kotlin",
conflicts: $ => [
// Ambiguous when used in an explicit delegation expression,
// since the '{' could either be interpreted as the class body
// or as the anonymous function body. Consider the following sequence:
//
// 'class' simple_identifier ':' user_type 'by' 'fun' '(' ')' • '{' …
//
// Possible interpretations:
//
// 'class' simple_identifier ':' user_type 'by' (anonymous_function 'fun' '(' ')' • function_body)
// 'class' simple_identifier ':' user_type 'by' (anonymous_function 'fun' '(' ')') • '{' …
[$.anonymous_function],
// Member access operator '::' conflicts with callable reference
[$._primary_expression, $.callable_reference],
// @Type(... could either be an annotation constructor invocation or an annotated expression
[$.constructor_invocation, $._unescaped_annotation],
// "expect" as a plaform modifier conflicts with expect as an identifier
[$.platform_modifier, $.simple_identifier],
// "data", "inner" as class modifier or id
[$.class_modifier, $.simple_identifier],
// "<x>.<y> = z assignment conflicts with <x>.<y>() function call"
[$._postfix_unary_expression, $._expression],
// ambiguity between generics and comparison operations (foo < b > c)
[$.call_expression, $.prefix_expression, $.comparison_expression],
[$.call_expression, $.range_expression, $.comparison_expression],
[$.call_expression, $.elvis_expression, $.comparison_expression],
[$.call_expression, $.check_expression, $.comparison_expression],
[$.call_expression, $.additive_expression, $.comparison_expression],
[$.call_expression, $.infix_expression, $.comparison_expression],
[$.call_expression, $.multiplicative_expression, $.comparison_expression],
[$.type_arguments, $._comparison_operator],
// ambiguity between prefix expressions and annotations before functions
[$._statement, $.prefix_expression],
[$._statement, $.prefix_expression, $.modifiers],
[$.prefix_expression, $.when_subject],
[$.prefix_expression, $.value_argument],
// ambiguity between multiple user types and class property/function declarations
[$.user_type],
[$.user_type, $.anonymous_function],
[$.user_type, $.function_type],
// ambiguity between annotated_lambda with modifiers and modifiers from var declarations
[$.annotated_lambda, $.modifiers],
// ambiguity between simple identifier 'set/get' with actual setter/getter functions.
[$.setter, $.simple_identifier],
[$.getter, $.simple_identifier],
// ambiguity between parameter modifiers in anonymous functions
[$.parameter_modifiers, $._type_modifier],
[$.super_expression],
],
externals: $ => [
$._automatic_semicolon,
$._import_list_delimiter,
$.safe_nav,
$._class,
],
extras: $ => [
$.comment,
/\s+/ // Whitespace
],
word: $ => $._alpha_identifier,
rules: {
// ====================
// Syntax grammar
// ====================
// ==========
// General
// ==========
// start
source_file: $ => seq(
optional($.shebang_line),
repeat($.file_annotation),
optional($.package_header),
repeat($._import_list),
repeat(seq($._statement, $._semi))
),
shebang_line: $ => seq("#!", /[^\r\n]*/),
file_annotation: $ => seq(
"@", "file", ":",
choice(
seq("[", repeat1($._unescaped_annotation), "]"),
$._unescaped_annotation
),
$._semi
),
package_header: $ => seq("package", $.identifier, $._semi),
_import_list: $ => seq(
repeat1($.import_header),
$._import_list_delimiter
),
import_header: $ => seq(
"import",
field("identifier", $.identifier),
optional(choice(
field("star", $.point_star),
field("alias", $.import_alias)
)),
$._semi
),
point_star: $ => ".*",
import_alias: $ => seq("as", field("alias", alias($.simple_identifier, $.type_identifier))),
type_alias: $ => seq(
optional($.modifiers),
"typealias",
field("identifier", alias($.simple_identifier, $.type_identifier)),
optional($.type_arguments),
"=",
$._type
),
_declaration: $ => choice(
$.class_declaration,
$.interface_declaration,
$.enum_class_declaration,
$.object_declaration,
$.function_declaration,
$.property_declaration,
// TODO: it would be better to have getter/setter only in
// property_declaration but it's difficult to get ASI
// (Automatic Semicolon Insertion) working in the lexer for
// getter/setter. Indeed, they can also have modifiers in
// front, which means it's not enough to lookahead for 'get' or 'set' in
// the lexer, you also need to handle modifier keywords. It is thus
// simpler to accept them here.
$.getter,
$.setter,
$.type_alias
),
// ==========
// Classes
// ==========
class_declaration: $ => prec.right(
seq(
field("modifiers", optional($.modifiers)),
prec(1, $._class),
field("identifier", alias($.simple_identifier, $.type_identifier)),
optional($.type_parameters),
optional($.primary_constructor),
field("delegation_specifiers", optional(seq(":", $._delegation_specifiers))),
optional($.type_constraints),
field("body", optional($.class_body))
)
),
interface_declaration: $ => prec.right(
seq(
field("modifiers", optional($.modifiers)),
seq(optional("fun"), "interface"),
field("identifier", alias($.simple_identifier, $.type_identifier)),
optional($.type_parameters),
optional($.primary_constructor),
field("delegation_specifiers", optional(seq(":", $._delegation_specifiers))),
optional($.type_constraints),
field("body", optional($.class_body))
)
),
enum_class_declaration: $ => prec.right(
seq(
field("modifiers", optional($.modifiers)),
"enum",
$._class,
field("identifier", alias($.simple_identifier, $.type_identifier)),
optional($.type_parameters),
optional($.primary_constructor),
field("delegation_specifiers", optional(seq(":", $._delegation_specifiers))),
optional($.type_constraints),
field("body", optional($.enum_class_body))
)
),
primary_constructor: $ => seq(
optional(seq(
field("modifiers", optional($.modifiers)),
"constructor"
)),
$._class_parameters
),
class_body: $ => seq("{", optional($._class_member_declarations), "}"),
_class_parameters: $ => seq(
"(",
optional(sep1($.class_parameter, ",")),
optional(","),
")"
),
class_parameter: $ => seq(
field("modifiers", optional($.modifiers)),
optional(choice("val", "var")),
$.simple_identifier,
":",
$._type,
optional(seq("=", $._expression))
),
_delegation_specifiers: $ => prec.left(sep1(
$.delegation_specifier,
// $._annotated_delegation_specifier, // TODO: Annotations cause ambiguities with type modifiers
","
)),
delegation_specifier: $ => prec.left(choice(
field("constructor_invocation", $.constructor_invocation),
$.explicit_delegation,
field("user_type", $.user_type),
$.function_type
)),
constructor_invocation: $ => seq($.user_type, $.value_arguments),
_annotated_delegation_specifier: $ => seq(repeat($.annotation), $.delegation_specifier),
explicit_delegation: $ => seq(
choice(
$.user_type,
$.function_type
),
"by",
$._expression
),
type_parameters: $ => seq("<", sep1($.type_parameter, ","), ">"),
type_parameter: $ => seq(
optional($.type_parameter_modifiers),
alias($.simple_identifier, $.type_identifier),
optional(seq(":", $._type))
),
type_constraints: $ => prec.right(seq("where", sep1($.type_constraint, ","))),
type_constraint: $ => seq(
repeat($.annotation),
alias($.simple_identifier, $.type_identifier),
":",
$._type
),
// ==========
// Class members
// ==========
_class_member_declarations: $ => repeat1(seq($._class_member_declaration, $._semi)),
_class_member_declaration: $ => choice(
$._declaration,
$.companion_object,
$.anonymous_initializer,
$.secondary_constructor
),
anonymous_initializer: $ => seq("init", $._block),
companion_object: $ => seq(
field("modifiers", optional($.modifiers)),
"companion",
"object",
optional(alias($.simple_identifier, $.type_identifier)),
optional(seq(":", $._delegation_specifiers)),
optional($.class_body)
),
function_value_parameters: $ => seq(
"(",
optional(sep1($.function_value_parameter, ",")),
optional(","),
")"
),
function_value_parameter: $ => seq(
optional(field("parameter_modifiers", $.parameter_modifiers)),
$.parameter
),
_receiver_type: $ => seq(
optional($.type_modifiers),
choice (
$._type_reference,
$.parenthesized_type,
$.nullable_type
)
),
function_declaration: $ => prec.right(seq( // TODO
field("modifiers", optional($.modifiers)),
"fun",
optional($.type_parameters),
optional(seq($._receiver_type, optional('.'))),
field("identifier", $.simple_identifier),
field("parameters", $.function_value_parameters),
optional(seq(":", $._type)),
optional($.type_constraints),
field("body", optional($.function_body))
)),
function_body: $ => choice($._block, seq("=", field("expression", $._expression))),
multi_variable_declaration: $ => seq(
"(",
sep1($.variable_declaration, ","),
optional(","),
")"
),
variable_declaration: $ => prec.left(PREC.VAR_DECL, seq(
// repeat($.annotation), TODO
field("identifier", $.simple_identifier),
field("type", optional(seq(":", $._type)))
)),
property_declaration: $ => prec.right(seq(
field("modifiers", optional($.modifiers)),
choice("val", "var"),
optional($.type_parameters),
optional(seq($._receiver_type, optional('.'))),
choice(
field("variable_declaration", $.variable_declaration),
field("multi_variable_declaration", $.multi_variable_declaration)
),
optional($.type_constraints),
optional(seq(
choice("=", "by"),
field("initial_value", $._expression)
)),
optional(';'),
choice(
// TODO: Getter-setter combinations
optional($.getter),
optional($.setter)
)
)),
property_delegate: $ => seq("by", $._expression),
getter: $ => prec.right(seq(
field("modifiers", optional($.modifiers)),
"get",
optional(seq(
"(", ")",
optional(seq(":", $._type)),
$.function_body
))
)),
setter: $ => prec.right(seq(
field("modifiers", optional($.modifiers)),
"set",
optional(seq(
"(",
$.parameter_with_optional_type,
")",
optional(seq(":", $._type)),
$.function_body
))
)),
parameters_with_optional_type: $ => seq("(", sep1($.parameter_with_optional_type, ","), ")"),
parameter_with_optional_type: $ => seq(
optional($.parameter_modifiers),
$.simple_identifier,
optional(seq(":", $._type))
),
parameter: $ => seq(
field("identifier", $.simple_identifier),
seq(":", field("type", $._type)),
optional(seq("=", field("default_value", $._expression)))
),
object_declaration: $ => prec.right(seq(
field("modifiers", optional($.modifiers)),
"object",
alias($.simple_identifier, $.type_identifier),
optional(seq(":", $._delegation_specifiers)),
optional($.class_body)
)),
secondary_constructor: $ => seq(
field("modifiers", optional($.modifiers)),
"constructor",
field("parameters", $.function_value_parameters),
field("delegation_call", optional(seq(":", $.constructor_delegation_call))),
field("body", optional($._block))
),
constructor_delegation_call: $ => seq(choice("this", "super"), $.value_arguments),
// ==========
// Enum classes
// ==========
enum_class_body: $ => seq(
"{",
optional($._enum_entries),
optional(seq(";", optional($._class_member_declarations))),
"}"
),
_enum_entries: $ => seq(sep1($.enum_entry, ","), optional(",")),
enum_entry: $ => seq(
field("modifiers", optional($.modifiers)),
$.simple_identifier,
optional($.value_arguments),
optional($.class_body)
),
// ==========
// Types
// ==========
_type: $ => seq(
optional($.type_modifiers),
choice(
$.parenthesized_type,
$.nullable_type,
$._type_reference,
$.function_type
)
),
_type_reference: $ => choice(
$.user_type,
"dynamic"
),
nullable_type: $ => seq(
field("type", choice($._type_reference, $.parenthesized_type)),
repeat1($._quest)
),
_quest: $ => "?",
// TODO: Figure out a better solution than right associativity
// to prevent nested types from being recognized as
// unary expresions with navigation suffixes.
user_type: $ => sep1($._simple_user_type, "."),
_simple_user_type: $ => prec.right(PREC.SIMPLE_USER_TYPE, seq(
field("identifier", alias($.simple_identifier, $.type_identifier)),
optional($.type_arguments)
)),
type_projection: $ => choice(
seq(optional($.type_projection_modifiers), $._type),
"*"
),
type_projection_modifiers: $ => repeat1($._type_projection_modifier),
_type_projection_modifier: $ => $.variance_modifier,
function_type: $ => seq(
optional(seq($._simple_user_type, ".")), // TODO: Support "real" types
field("parameters", $.function_type_parameters),
"->",
$._type
),
// A higher-than-default precedence resolves the ambiguity with 'parenthesized_type'
function_type_parameters: $ => prec.left(1, seq(
"(",
field("parameters", optional(sep1(choice($.parameter, $._type), ","))),
")"
)),
parenthesized_type: $ => seq("(", field("type", $._type), ")"),
parenthesized_user_type: $ => seq(
"(",
choice($.user_type, $.parenthesized_user_type),
")"
),
// ==========
// Statements
// ==========
statements: $ => seq(
$._statement,
repeat(seq($._semi, $._statement)),
optional($._semi),
),
_statement: $ => choice(
$._declaration,
seq(
repeat(choice($.label, $.annotation)),
choice(
$.assignment,
$._loop_statement,
$._expression
)
)
),
label: $ => token(seq(
/[a-zA-Z_][a-zA-Z_0-9]*/,
"@"
)),
control_structure_body: $ => choice($._block, field("statement", $._statement)),
_block: $ => prec(PREC.BLOCK, seq("{", optional($.statements), "}")),
_loop_statement: $ => choice(
$.for_statement,
$.while_statement,
$.do_while_statement
),
for_statement: $ => prec.right(seq(
"for",
"(",
repeat($.annotation),
choice(
field("variable_declaration", $.variable_declaration),
field("multi_variable_declaration", $.multi_variable_declaration)
),
"in",
field("collection", $._expression),
")",
optional(field("body", $.control_structure_body))
)),
while_statement: $ => seq(
"while",
"(",
field("condition", $._expression),
")",
choice(";", field("body", $.control_structure_body))
),
do_while_statement: $ => prec.right(seq(
"do",
field("body", optional($.control_structure_body)),
"while",
"(",
field("condition", $._expression),
")",
)),
// See also https://github.com/tree-sitter/tree-sitter/issues/160
// generic EOF/newline token
_semi: $ => $._automatic_semicolon,
assignment: $ => choice(
prec.left(PREC.ASSIGNMENT, seq($.directly_assignable_expression, $._assignment_and_operator, $._expression)),
prec.left(PREC.ASSIGNMENT, seq(
field("directly_assignable_expression", $.directly_assignable_expression),
"=",
field("expression", $._expression)
)),
// TODO
),
// ==========
// Expressions
// ==========
_expression: $ => choice(
$._unary_expression,
$._binary_expression,
$._primary_expression
),
// Unary expressions
_unary_expression: $ => choice(
$.postfix_expression,
$.call_expression,
$.indexing_expression,
$.navigation_expression,
$.prefix_expression,
$.as_expression,
$.spread_expression
),
postfix_expression: $ => prec.left(PREC.POSTFIX, seq(field("expression", $._expression), $._postfix_unary_operator)),
call_expression: $ => prec.left(PREC.POSTFIX, seq($._expression, $.call_suffix)),
indexing_expression: $ => prec.left(PREC.POSTFIX, seq(field("expression", $._expression), field("indexing_suffix", $.indexing_suffix))),
navigation_expression: $ => prec.left(PREC.POSTFIX, seq(field("expression", $._expression), field("navigation_suffix", $.navigation_suffix))),
prefix_expression: $ => prec.right(seq(choice($.annotation, $.label, $._prefix_unary_operator), seq(field("expression", $._expression)))),
as_expression: $ => prec.left(PREC.AS, seq(field("expression", $._expression), $._as_operator, field("type", $._type))),
spread_expression: $ => prec.left(PREC.SPREAD, seq("*", field("expression", $._expression))),
// Binary expressions
_binary_expression: $ => choice(
$.multiplicative_expression,
$.additive_expression,
$.range_expression,
$.infix_expression,
$.elvis_expression,
$.check_expression,
$.comparison_expression,
$.equality_expression,
$.conjunction_expression,
$.disjunction_expression
),
multiplicative_expression: $ => prec.left(PREC.MULTIPLICATIVE, seq(field("left", $._expression), $._multiplicative_operator, field("right", $._expression))),
additive_expression: $ => prec.left(PREC.ADDITIVE, seq(field("left", $._expression), $._additive_operator, field("right", $._expression))),
range_expression: $ => prec.left(PREC.RANGE, seq(field("left", $._expression), "..", field("right", $._expression))),
infix_expression: $ => prec.left(PREC.INFIX, seq(field("left", $._expression), $.simple_identifier, field("right", $._expression))),
elvis_expression: $ => prec.left(PREC.ELVIS, seq(field("left", $._expression), "?:", field("right", $._expression))),
check_expression: $ => prec.left(PREC.CHECK, seq(field("left", $._expression), choice(
seq($._in_operator, field("right", $._expression)),
seq($._is_operator, field("right", $._type))))),
comparison_expression: $ => prec.left(PREC.COMPARISON, seq(field("left", $._expression), $._comparison_operator, field("right", $._expression))),
equality_expression: $ => prec.left(PREC.EQUALITY, seq(field("left", $._expression), $._equality_operator, field("right", $._expression))),
conjunction_expression: $ => prec.left(PREC.CONJUNCTION, seq(field("left", $._expression), "&&", field("right", $._expression))),
disjunction_expression: $ => prec.left(PREC.DISJUNCTION, seq(field("left", $._expression), "||", field("right", $._expression))),
// Suffixes
indexing_suffix: $ => seq("[", sep1($._expression, ","), "]"),
navigation_suffix: $ => seq(
$._member_access_operator,
choice(
field("identifier", $.simple_identifier),
$.parenthesized_expression,
"class"
)
),
call_suffix: $ => prec.left(seq(
// this introduces ambiguities with 'less than' for comparisons
optional($.type_arguments),
choice(
seq(
field("value_arguments", optional($.value_arguments)),
field("annotated_lambda", $.annotated_lambda)
),
field("value_arguments", $.value_arguments)
)
)),
annotated_lambda: $ => seq(
repeat($.annotation),
optional($.label),
$.lambda_literal
),
type_arguments: $ => seq("<", sep1($.type_projection, ","), ">"),
value_arguments: $ => seq(
"(",
optional(
seq(
sep1($.value_argument, ","),
optional(","),
)
),
")"
),
value_argument: $ => seq(
optional($.annotation),
optional(seq(field("value_argument_identifier", $.simple_identifier), "=")),
optional("*"),
field("expression", $._expression)
),
_primary_expression: $ => choice(
$.parenthesized_expression,
$.simple_identifier,
$._literal_constant,
$._string_literal,
$.callable_reference,
$._function_literal,
$.object_literal,
$.collection_literal,
$.this_expression,
$.super_expression,
$.if_expression,
$.when_expression,
$.try_catch_expression,
$.jump_expression
),
parenthesized_expression: $ => seq("(", field("inner_expression", $._expression), ")"),
collection_literal: $ => seq("[", $._expression, repeat(seq(",", $._expression)), "]"),
_literal_constant: $ => choice(
$.boolean_literal,
$.integer_literal,
$.hex_literal,
$.bin_literal,
$.character_literal,
$.real_literal,
$.null_literal,
$.long_literal,
$.unsigned_literal
),
null_literal : $ => "null",
_string_literal: $ => choice(
$.line_string_literal,
$.multi_line_string_literal
),
line_string_literal: $ => seq('"', repeat(choice($._line_string_content, $._interpolation)), '"'),
multi_line_string_literal: $ => seq(
'"""',
repeat(choice(
$._multi_line_string_content,
$._interpolation
)),
'"""'
),
_line_string_content: $ => choice(
$._line_str_text,
$.character_escape_seq
),
line_string_expression: $ => seq("${", $._expression, "}"),
_multi_line_string_content: $ => choice($._multi_line_str_text, '"'),
_interpolation: $ => choice(
seq("${", alias($._expression, $.interpolated_expression), "}"),
seq("$", alias($.simple_identifier, $.interpolated_identifier))
),
lambda_literal: $ => prec(PREC.LAMBDA_LITERAL, seq(
"{",
optional(seq(field("parameters", optional($.lambda_parameters)), "->")),
field("statements", optional($.statements)),
"}"
)),
lambda_parameters: $ => sep1($._lambda_parameter, ","),
_lambda_parameter: $ => choice(
$.variable_declaration,
$.multi_variable_declaration
),
anonymous_function: $ => prec.right(seq(
"fun",
optional(seq(sep1($._simple_user_type, "."), ".")), // TODO
$.function_value_parameters,
optional(seq(":", $._type)),
field("body", optional($.function_body))
)),
_function_literal: $ => choice(
$.lambda_literal,
$.anonymous_function
),
object_literal: $ => prec.right(seq(
"object",
optional(seq(":", $._delegation_specifiers)),
optional($.class_body)
)),
this_expression: $ => "this",
super_expression: $ => seq(
"super",
optional(seq("<", $.simple_identifier, ">"))
// TODO optional(seq("<", $._type, ">")),
// TODO optional(seq("@", $.simple_identifier))
),
if_expression: $ => prec.right(seq(
"if",
"(", field("condition", $._expression), ")",
field("true_branch", optional($.control_structure_body)),
optional(";"),
optional(seq(
"else",
choice(field("else_branch", $.control_structure_body), ";")
))
)),
when_subject: $ => seq(
"(",
optional(seq(
repeat($.annotation),
"val",
$.variable_declaration,
"="
)),
field("expression", $._expression),
")",
),
when_expression: $ => seq(
"when",
field("subject", optional($.when_subject)),
"{",
field("entries", repeat($.when_entry)),
"}"
),
when_entry: $ => seq(
choice(
field("conditions", sep1($.when_condition, ",")),
field("conditions", $.when_entry_else)
),
"->",
field("body", $.control_structure_body),
optional($._semi)
),
when_entry_else: $ => "else",
when_condition: $ => choice(
field("expression", $._expression),
field("range_test", $.range_test),
field("type_test", $.type_test)
),
range_test: $ => seq($._in_operator, field("expression", $._expression)),
type_test: $ => seq($._is_operator, field("expression", $._type)),
try_catch_expression: $ => seq(
"try",
$._block,
choice(
seq(
field("catch_blocks", repeat1($.catch_block)),
field("finally_block", optional($.finally_block))),
field("finally_block", $.finally_block)
)
),
catch_block: $ => seq(
"catch",
"(",
repeat($.annotation),
field("identifier", $.simple_identifier),
":",
field("type", $._type),
")",
$._block,
// it looks like that tree-sitter will `eat` these tokens
optional(repeat(choice(
"\n",
"\r",
"\t",
" "
)))
),
finally_block: $ => seq("finally", $._block),
jump_expression: $ => choice(
prec.right(PREC.RETURN_OR_THROW, seq("throw", field("throw_expression", $._expression))),
prec.right(PREC.RETURN_OR_THROW, seq(choice("return", $._return_at), field("return_expression", optional($._expression)))),
"continue",
$._continue_at,
"break",
$._break_at
),
callable_reference: $ => seq(
optional(alias($.simple_identifier, $.type_identifier)), // TODO
"::",
choice($.simple_identifier, "class")
),
_assignment_and_operator: $ => choice("+=", "-=", "*=", "/=", "%="),
_equality_operator: $ => choice("!=", "!==", "==", "==="),
_comparison_operator: $ => choice("<", ">", "<=", ">="),
_in_operator: $ => choice("in", "!in"),
_is_operator: $ => choice("is", "!is"),
_additive_operator: $ => choice("+", "-"),
_multiplicative_operator: $ => choice("*", "/", "%"),
_as_operator: $ => choice("as", "as?"),
_prefix_unary_operator: $ => choice("++", "--", "-", "+", "!"),
_postfix_unary_operator: $ => choice("++", "--", "!!"),
_member_access_operator: $ => choice(".", "::", alias($.safe_nav, '?.')),
_indexing_suffix: $ => seq(
'[',