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grammar.js
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grammar.js
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/* Copyright 2023 Leorize <leorize+oss@disroot.org>
*
* SPDX-License-Identifier: MPL-2.0
*/
/// <reference types="tree-sitter-cli/dsl" />
const DecimalLiteral = /[0-9](_?[0-9])*/;
const DecimalFloatLiteral = token(
seq(
optional("-"),
choice(
seq(DecimalLiteral, ".", DecimalLiteral),
seq(DecimalLiteral, /[eE][+-]?/, DecimalLiteral),
seq(DecimalLiteral, ".", DecimalLiteral, /[eE][+-]?/, DecimalLiteral)
)
)
);
const NumericLiteral = token(
seq(
optional("-"),
choice(
DecimalLiteral,
/0[xX][0-9a-fA-F](_?[0-9a-fA-F])*/,
/0[oO][0-7](_?[0-7])*/,
/0[bB][01](_?[01])*/
)
)
);
// Nim doesn't define any unicode categories, so let's just pick them all
const Identifier =
/[a-zA-Z\U00000080-\U0010FFFF&&[^∙∘×★⊗⊘⊙⊛⊠⊡∩∧⊓±⊕⊖⊞⊟∪∨⊔]](_?[a-zA-Z0-9\U00000080-\U0010FFFF&&[^∙∘×★⊗⊘⊙⊛⊠⊡∩∧⊓±⊕⊖⊞⊟∪∨⊔]])*/;
const CharEscapeSequence = /[rRcCnNlLfFtTvV\\"'aAbBeE]|\d+|[xX][0-9a-fA-F]{2}/;
const Templates = {
/**
* @template T
* @param {GrammarSymbols<T>} $
* @param {RuleOrLiteral} argument_list */
call: ($, argument_list) =>
seq(
field("function", $._basic_expression),
field("arguments", alias(argument_list, $.argument_list))
),
/**
* @template T
* @param {GrammarSymbols<T>} $
* @param {RuleOrLiteral} keyword */
if: ($, keyword) =>
seq(keyword, field("condition", $._expression), $._if_body),
/**
* @template T
* @param {GrammarSymbols<T>} $
* @param {RuleOrLiteral} keyword */
proc_type: ($, keyword) =>
prec.right(seq(keyword, Templates.proc_type_tail($))),
/**
* @template T
* @param {GrammarSymbols<T>} $ */
proc_type_tail: $ =>
seq(
field("parameters", optional($.parameter_declaration_list)),
optional(seq(":", field("return_type", $.type_expression))),
field("pragmas", optional($.pragma_list))
),
/**
* @template T
* @param {GrammarSymbols<T>} $
* @param {RuleOrLiteral} keyword */
import: ($, keyword) => prec.right(seq(keyword, $._import_body)),
/**
* @template T
* @param {GrammarSymbols<T>} $
* @param {RuleOrLiteral} keyword */
return_like: ($, keyword) =>
prec.right(seq(keyword, optional($._expression_with_post_block))),
/**
* @template T
* @param {GrammarSymbols<T>} $
* @param {RuleOrLiteral} left
* @param {RuleOrLiteral} right */
infix_expression: ($, left, right) =>
choice(
.../** @type {[Rule, string, Function][]} */ ([
[$._infix_operator_10r, "binary_10", prec.right],
[$._infix_operator_10l, "binary_10", prec.left],
[$._infix_operator_9, "binary_9", prec.left],
[$._infix_operator_8, "binary_8", prec.left],
[$._infix_operator_7, "binary_7", prec.left],
[$._infix_operator_6, "binary_6", prec.left],
[$._infix_operator_5, "binary_5", prec.left],
[$._infix_operator_4, "binary_4", prec.left],
[$._infix_operator_3, "binary_3", prec.left],
[$._infix_operator_2, "binary_2", prec.left],
[$._infix_operator_1, "binary_1", prec.left],
[$._infix_operator_0, "binary_0", prec.left],
]).map(([operator, precedence, precFn]) =>
precFn(
precedence,
seq(
field("left", left),
field("operator", operator),
field("right", right)
)
)
)
),
};
const WordOperators = {
9: ["div", "mod", "shl", "shr"],
5: ["in", "notin", "is", "isnot", "not", "of", "as", "from"],
4: ["and"],
3: ["or", "xor"],
};
const Operators = [
"=",
"+",
"-",
"*",
"/",
"<",
">",
"@",
"$",
"~",
"&",
"%",
"|",
"!",
"?",
"^",
".",
":",
"\\",
"∙",
"∘",
"×",
"★",
"⊗",
"⊘",
"⊙",
"⊛",
"⊠",
"⊡",
"∩",
"∧",
"⊓",
"±",
"⊕",
"⊖",
"⊞",
"⊟",
"∪",
"∨",
"⊔",
];
const InfixOperators = {
R10: token(seq("^", repeat(choice(...Operators)))),
L10: token(seq("$", repeat(choice(...Operators)))),
L9: token(
seq(
choice(
"%",
"\\",
"/",
"∙",
"∘",
"×",
"★",
"⊗",
"⊘",
"⊙",
"⊛",
"⊠",
"⊡",
"∩",
"∧",
"⊓"
),
repeat(choice(...Operators))
)
),
L9Star: token(seq("*", repeat(choice(...Operators.filter(x => x != ":"))))),
L8: token(
seq(
choice("+", "-", "~", "|", "±", "⊕", "⊖", "⊞", "⊟", "∪", "∨", "⊔"),
repeat(choice(...Operators))
)
),
L7: token(seq("&", repeat(choice(...Operators)))),
L6: token(seq(".", repeat1(choice(...Operators)))),
L5: token(
choice(
seq("=", repeat1(choice(...Operators))),
seq(choice("<", ">", "!"), repeat(choice(...Operators)))
)
),
L2: token(
choice(
seq(":", repeat1(choice(...Operators))),
seq(choice("@", "?"), repeat(choice(...Operators)))
)
),
L1: token(
seq(
repeat1(
choice(
...Operators.filter(x => !["<", ">", "!", "=", "~", "?"].includes(x))
)
),
"="
)
),
L0: token(seq(repeat(choice(...Operators)), choice("=", "-", "~"), ">")),
};
module.exports = grammar({
name: "nim",
externals: $ => [
$._block_comment_content,
$._block_documentation_comment_content,
$.comment_content, // used to notify the scanner
$._long_string_quote,
$._layout_start,
$._layout_end,
$._layout_terminator,
$._layout_empty,
$._inhibit_layout_end,
$._inhibit_keyword_termination,
// @ts-ignore: DSL not updated for literals
",",
$._synchronize,
$._invalid_layout,
$._sigil_operator,
$._prefix_operator,
$._want_export_marker,
$._case_of,
],
extras: $ => [
/[\n\r ]+/,
$._synchronize,
$.comment,
$.documentation_comment,
$.block_comment,
$.block_documentation_comment,
],
conflicts: $ => [
// Conflict:
// 'var' _symbol . ':'
//
// _symbol -> symbol_declaration -> var_section
// _symbol -> _basic_expression -> var_type
//
// While symbol_declaration should be preferred here,
// it gets complicated when parenthesized and tuple_construction
// clashes, say:
//
// (var x,
//
// Is this a tuple or an unfinished var_section?
//
// The solution is in the context: in type expressions,
// this should be a tuple. In any other context, this
// is a var section.
//
// Solving it using the grammar would require an another factor
// of basic_expression into smaller parts, which is undesirable.
[$.symbol_declaration, $._basic_expression],
],
precedences: $ => [
[
"sigil",
"suffix",
"unary",
"type_modifiers",
"binary_10",
"binary_9",
"binary_8",
"binary_7",
"binary_6",
"binary_5",
"binary_4",
"binary_3",
"binary_2",
"binary_1",
"binary_0",
$._expression,
$._simple_expression_command_start,
$.type_expression,
$.pragma_expression,
],
["proc_type"],
["post_expr", $._basic_expression],
["post_expr", $._simple_expression_command_start],
["post_expr", $._simple_expression],
["post_expr", $._expression_statement],
[$.enum_declaration, $.enum_type],
[$.object_declaration, $.object_type],
[$._prefix_expression, $._simple_expression_command_start],
[$._simple_expression, $._command_expression],
[$._expression_with_call_do, $.equal_expression],
[$._expression, $._command_expression],
[$._left_hand_side, $._expression],
// Conflict:
// _basic_expression (_simple_expression_command_start) . 'of'
//
// _simple_expression_command_start -> _command_expression_argument_list
// _simple_expression_command_start -> _simple_expression
//
// Prefer the latter so the _simple_expression . 'of' become an infix
[$._simple_expression, $._command_expression_argument_list],
// Conflict:
// _basic_expression . 'on'
//
// _basic_expression -> _command_expression
// _basic_expression -> _simple_expression_command_start
//
// Prefer the latter to facilitate infix
[$._simple_expression_command_start, $._command_expression],
// Conflict:
// discard _basic_expression _call_arrgument_list . 'do'
//
// -> _call_expression
// -> _call_do_argument_list
//
// Prefer the latter
[$._call_do_argument_list, $._call_expression],
// Conflict:
// infix_expression ':' discard _basic_expression . 'do'
//
// -> _simple_expression_command_start . 'do'
// -> _call_do
//
// Prefer latter
[$._call_do, $._simple_expression_command_start],
// Conflict
// discard _basic_expression do_block
//
// do_block -> _call_do_argument_list
// do_block -> _post_expression_block
//
// Either works, but prefer former as it is more specific.
[$._call_do_argument_list, $._post_expression_block],
// Conflict
// discard _basic_expression _call_argument_list ':'
//
// -> _call_expression ':'
// -> _call_block_argument_list
//
// Need less to say, prefer latter
[$._call_block_argument_list, $._call_expression],
// Conflict
// discard _basic_expression ':'
//
// -> _simple_expression_command_start ':'
// -> _call_block
//
// Need less to say, prefer latter
[$._call_block, $._simple_expression_command_start],
// Conflict
// when proc = discard _basic_expression _command_expression_argument_list . ':'
//
// -> _command_expression . ':'
// -> _basic_expression _command_block_argument_list
//
// Prefer latter
[$._command_block_argument_list, $._command_expression],
// Conflict:
// type type_symbol_declaration '=' _type_modifier _basic_expression . 'func'
//
// _basic_expression . 'func' -> _command_statement
// _basic_expression . 'func' -> _simple_expression_command_start . 'func'
//
// Prefer latter
[$._simple_expression_command_start, $._command_statement],
[$._simple_expression_command_start, $._command_complex_expression],
// Conflict:
// _basic_expression _expression_with_call_do . ';'
//
// -> _command_complex_expression_argument_list
// -> _equal_expression_list
//
// Prefer latter since it's more flexible
[$._equal_expression_list, $._command_complex_expression_argument_list],
// Conflict:
// _proc_type . '='
//
// -> (_basic_expression _proc_type) . '='
// -> (proc_expression _proc_type) . '=' statement_list
//
// Prefer latter
["proc_expr", $._basic_expression],
// Conflict:
// 'type' type_symbol_declaration '=' 'distinct' type_expression
//
// type_expression -> _type_definition
// 'distinct' type_expression -> distinct_type
//
// Prefer former since it's more flexible
[$._type_definition, "type_modifiers"],
],
// supertypes: $ => [$._statement, $._expression],
word: $ => $.identifier,
rules: {
source_file: $ => optional($._semi_statement_list),
statement_list: $ =>
choice($._block_statement_list, $._line_statement_list, $._layout_empty),
_line_statement_list: $ => prec.right(sep1($._simple_statement, ";")),
_block_statement_list: $ =>
seq($._layout_start, optional($._semi_statement_list), $._layout_end),
_semi_statement_list: $ =>
repeat1(seq($._statement, choice(";", $._layout_terminator))),
_statement: $ => choice($._simple_statement, $._complex_statement),
_complex_statement: $ =>
choice(
$.while,
$.static_statement,
$.defer,
$.typeof,
alias($._infix_typeof_expression, $.infix_expression),
$._declaration
),
_simple_statement: $ =>
choice($._expression_statement, $._simple_statement_no_expression),
_simple_statement_no_expression: $ =>
choice(
$.import_statement,
$.import_from_statement,
$.export_statement,
$.include_statement,
$.discard_statement,
$.return_statement,
$.raise_statement,
$.yield_statement,
$.break_statement,
$.continue_statement,
$.assembly_statement,
$.bind_statement,
$.mixin_statement,
$.pragma_statement
),
_expression_statement: $ =>
choice(
$._expression,
$.assignment,
alias($._call_extended, $.call),
alias($._infix_extended, $.infix_expression),
alias($._prefix_extended, $.prefix_expression)
),
import_statement: $ => Templates.import($, keyword("import")),
export_statement: $ => Templates.import($, keyword("export")),
_import_body: $ => choice($.expression_list, $._import_except),
_import_except: $ =>
seq(
$._expression,
optional($._inhibit_keyword_termination),
$.except_clause
),
except_clause: $ => seq(keyword("except"), $.expression_list),
include_statement: $ => seq(keyword("include"), $.expression_list),
discard_statement: $ => Templates.return_like($, keyword("discard")),
return_statement: $ => Templates.return_like($, keyword("return")),
raise_statement: $ => Templates.return_like($, keyword("raise")),
yield_statement: $ => Templates.return_like($, keyword("yield")),
break_statement: $ => Templates.return_like($, keyword("break")),
continue_statement: $ => Templates.return_like($, keyword("continue")),
assembly_statement: $ =>
seq(
keyword("asm"),
optional(field("pragma", $.pragma_list)),
$._string_literal
),
bind_statement: $ => seq(keyword("bind"), $.expression_list),
mixin_statement: $ => seq(keyword("mixin"), $.expression_list),
import_from_statement: $ =>
seq(
// Don't ask me why, but lowering the precedence makes it
// matches correctly.
keyword("from", 0),
field("module", $._expression),
keyword("import"),
$.expression_list
),
while: $ =>
seq(
keyword("while"),
field("condition", $._simple_expression),
":",
field("body", $.statement_list)
),
static_statement: $ =>
seq(keyword("static"), ":", field("body", $.statement_list)),
pragma_statement: $ =>
prec.right(
seq($.pragma_list, optional(seq(":", field("body", $.statement_list))))
),
defer: $ => seq(keyword("defer"), ":", field("body", $.statement_list)),
_typeof_expression: $ =>
choice($.typeof, alias($._infix_typeof_expression, $.infix_expression)),
typeof: $ =>
seq(keyword("type"), "(", $._simple_expression, $._paren_close),
_infix_typeof_expression: $ =>
Templates.infix_expression(
$,
$._typeof_expression,
choice($._typeof_expression, $._simple_expression)
),
_declaration: $ =>
choice(
$.proc_declaration,
$.func_declaration,
$.method_declaration,
$.iterator_declaration,
$.macro_declaration,
$.template_declaration,
$.converter_declaration,
$.using_section,
$.const_section,
$.let_section,
$.var_section,
$.type_section
),
proc_declaration: $ => seq(keyword("proc"), $._routine_declaration),
func_declaration: $ => seq(keyword("func"), $._routine_declaration),
method_declaration: $ => seq(keyword("method"), $._routine_declaration),
iterator_declaration: $ => seq(keyword("iterator"), $._routine_declaration),
macro_declaration: $ => seq(keyword("macro"), $._routine_declaration),
template_declaration: $ => seq(keyword("template"), $._routine_declaration),
converter_declaration: $ =>
seq(keyword("converter"), $._routine_declaration),
_routine_declaration: $ =>
seq(
field("name", choice($._symbol, $.exported_symbol)),
field("rewrite_pattern", optional($.term_rewriting_pattern)),
field("generic_parameters", optional($.generic_parameter_list)),
Templates.proc_type_tail($),
optional(seq("=", field("body", $.statement_list)))
),
generic_parameter_list: $ =>
seq("[", optional($._parameter_declaration_list), $._bracket_close),
term_rewriting_pattern: $ =>
seq("{", alias($._semi_statement_list, $.statement_list), $._curly_close),
using_section: $ => seq(keyword("using"), $._variable_declaration_section),
const_section: $ => seq(keyword("const"), $._variable_declaration_section),
let_section: $ => seq(keyword("let"), $._variable_declaration_section),
var_section: $ =>
// Prefer the interpretation of var section over var_type
prec.dynamic(1, seq(keyword("var"), $._variable_declaration_section)),
_variable_declaration_section: $ => section($, $.variable_declaration),
variable_declaration: $ =>
choice(
seq(
$.symbol_declaration_list,
seq(":", field("type", $.type_expression)),
optional(seq("=", field("value", $._expression_with_post_block)))
),
seq(
$.symbol_declaration_list,
optional(seq("=", field("value", $._expression_with_post_block)))
)
),
type_section: $ => seq(keyword("type"), section($, $.type_declaration)),
type_declaration: $ =>
seq($.type_symbol_declaration, optional(seq("=", $._type_definition))),
type_symbol_declaration: $ =>
seq(
field("name", choice($._symbol, $.exported_symbol)),
optional($.generic_parameter_list),
optional(field("pragma", $.pragma_list))
),
_type_definition: $ =>
choice(
$.type_expression,
$.enum_declaration,
$.object_declaration,
$.concept_declaration,
alias($._distinct_declaration, $.distinct_type),
alias($._ref_declaration, $.ref_type),
alias($._pointer_declaration, $.pointer_type),
alias($._tuple_declaration, $.tuple_type),
alias($._call_extended, $.call)
),
_distinct_declaration: $ => seq(keyword("distinct"), $._type_definition),
_ref_declaration: $ => seq(keyword("ref"), $._type_definition),
_pointer_declaration: $ => seq(keyword("ptr"), $._type_definition),
enum_declaration: $ =>
seq(
keyword("enum"),
section($, repeat1(seq($.enum_field_declaration, optional(","))))
),
enum_field_declaration: $ =>
prec.right(
seq(
$.symbol_declaration,
// This should be _expression proper, but doing so inflates
// the parser states to unusable.
optional(seq("=", field("value", $._expression)))
)
),
_tuple_declaration: $ =>
seq(
keyword("tuple"),
seq(
$._layout_start,
repeat1(
seq(
alias($._identifier_declaration, $.field_declaration),
$._layout_terminator
)
),
$._layout_end
)
),
object_declaration: $ =>
seq(
keyword("object"),
optional(field("pragma", $.pragma_list)),
optional(seq(keyword("of"), field("inherits", $.type_expression))),
optional(
alias($._object_field_declaration_list, $.field_declaration_list)
)
),
_object_field_declaration_branch_list: $ =>
choice(
$._object_field_declaration,
$._object_field_declaration_list,
$._layout_empty
),
_object_field_declaration_list: $ =>
seq(
$._layout_start,
repeat(seq($._object_field_declaration, $._layout_terminator)),
$._layout_end
),
_object_field_declaration: $ =>
choice(
alias($._identifier_declaration, $.field_declaration),
$.conditional_declaration,
$.variant_declaration,
$.nil_literal,
alias(keyword("discard"), $.discard_statement)
),
conditional_declaration: $ =>
prec.right(
seq(
keyword("when"),
field("condition", $._expression),
":",
field(
"consequence",
alias(
$._object_field_declaration_branch_list,
$.field_declaration_list
)
),
repeat(
field(
"alternative",
choice(
alias($._elif_declaration_branch, $.elif_branch),
alias($._else_declaration_branch, $.else_branch),
$._inhibit_keyword_termination
)
)
)
)
),
_elif_declaration_branch: $ =>
seq(
keyword("elif"),
field("condition", $._expression),
":",
field(
"consequence",
alias(
$._object_field_declaration_branch_list,
$.field_declaration_list
)
)
),
variant_declaration: $ => seq(keyword("case"), $._variant_declaration_body),
_variant_declaration_body: $ =>
prec.right(
seq(
$.variant_discriminator_declaration,
optional(":"),
repeat(
field("alternative", alias($._of_declaration_branch, $.of_branch))
),
optional($._inhibit_keyword_termination),
optional(
field(
"alternative",
alias($._else_declaration_branch, $.else_branch)
)
)
)
),
variant_discriminator_declaration: $ => $._identifier_declaration,
_of_declaration_branch: $ =>
seq(
alias($._case_of, "of"),
field("values", $.expression_list),
":",
field(
"consequence",
alias(
$._object_field_declaration_branch_list,
$.field_declaration_list
)
)
),
_else_declaration_branch: $ =>
seq(
keyword("else"),
":",
field(
"consequence",
alias(
$._object_field_declaration_branch_list,
$.field_declaration_list
)
)
),
concept_declaration: $ =>
seq(
keyword("concept"),
field(
"parameters",
optional(alias($._concept_parameter_list, $.parameter_list))
),
optional(seq(keyword("of"), field("refines", $.refinement_list))),
optional(
field("body", alias($._block_statement_list, $.statement_list))
)
),
refinement_list: $ => sep1($.type_expression, ","),
_concept_parameter_list: $ => sep1($._concept_parameter, ","),
_concept_parameter: $ =>
choice(
$._symbol,
alias($._concept_pointer_parameter, $.pointer_parameter),
alias($._concept_ref_parameter, $.ref_parameter),
alias($._concept_static_parameter, $.static_parameter),
alias($._concept_type_parameter, $.type_parameter),
alias($._concept_var_parameter, $.var_parameter)
),
_concept_pointer_parameter: $ => seq(keyword("ptr"), $._symbol),
_concept_ref_parameter: $ => seq(keyword("ref"), $._symbol),
_concept_static_parameter: $ => seq(keyword("static"), $._symbol),
_concept_type_parameter: $ => seq(keyword("type"), $._symbol),
_concept_var_parameter: $ => seq(keyword("var"), $._symbol),
_expression_with_post_block: $ =>
choice(
$._expression_with_call_do,
alias($._call_block, $.call),
alias($._command_block, $.call),
alias($._dot_generic_call_block, $.dot_generic_call),
alias($._infix_extended, $.infix_expression),
alias($._prefix_extended, $.prefix_expression)
),
_expression_with_call_do: $ =>
choice(
$._expression,
alias($._call_do, $.call),
alias($._command_complex_expression, $.call),
alias($._dot_generic_call_do, $.dot_generic_call)
),
_expression: $ =>
choice(
$._simple_expression,
$.proc_expression,
$.func_expression,
$.iterator_expression,
$.block,
$.if,
$.when,
$.case,
$.try,
$.for
),
_simple_expression: $ =>
choice(
$._simple_expression_command_start,
alias($._prefix_expression, $.prefix_expression)
),
_simple_expression_command_start: $ =>
choice(
$._basic_expression,
alias($._command_expression, $.call),
alias($._infix_expression, $.infix_expression),
alias($._prefix_expression_command_start, $.prefix_expression)
),
_basic_expression: $ =>
choice(
$._literal,
$._symbol,
$.array_construction,
$.curly_construction,
$.tuple_construction,
$.cast,
$.parenthesized,
$.dot_expression,
$.bracket_expression,
$.curly_expression,
$.generalized_string,
$.pragma_expression,
$.object_type,
$.tuple_type,
$.enum_type,
$.var_type,
$.out_type,
$.distinct_type,
$.ref_type,
$.pointer_type,
$.dot_generic_call,
alias($._proc_type, $.proc_type),
alias($._iterator_type, $.iterator_type),
alias($._call_expression, $.call),
alias($._sigil_expression, $.prefix_expression)
),
/* Structural */
for: $ =>
seq(keyword("for"), $._for_body, ":", field("body", $.statement_list)),
_for_body: $ =>
seq(
field("left", $.symbol_declaration_list),
keyword("in"),
field("right", $._expression)
),
block: $ =>
seq(
keyword("block"),
optional(field("label", $._symbol)),
":",
field("body", $.statement_list)
),
if: $ => Templates.if($, keyword("if")),
when: $ => Templates.if($, keyword("when")),
_if_body: $ =>
prec.right(
seq(
":",
field("consequence", $.statement_list),
optional($._if_alternatives)
)
),
_if_branch: $ => choice($.elif_branch, $.else_branch),
_if_alternatives: $ =>
repeat1(
choice(
$._inhibit_keyword_termination,
field("alternative", $._if_branch)
)
),
case: $ =>
prec.right(
seq(
keyword("case"),
field("value", $._expression),
optional(":"),
repeat(field("alternative", $.of_branch)),
optional($._if_alternatives)
)
),
try: $ =>
prec.right(
seq(
keyword("try"),
":",
field("body", $.statement_list),
repeat(choice($._inhibit_keyword_termination, $._try_branch))
)
),
_try_branch: $ => choice($.except_branch, $.finally_branch),
of_branch: $ =>
seq(
alias($._case_of, "of"),
field("values", $.expression_list),
":",
field("consequence", $.statement_list)
),
elif_branch: $ =>
seq(
keyword("elif"),
field("condition", $._expression),
":",
field("consequence", $.statement_list)
),
else_branch: $ =>
seq(keyword("else"), ":", field("consequence", $.statement_list)),
except_branch: $ =>
seq(
keyword("except"),
optional(field("values", $.expression_list)),
":",
field("consequence", $.statement_list)
),
finally_branch: $ =>
seq(keyword("finally"), ":", field("body", $.statement_list)),
do_block: $ =>
seq(
keyword("do"),
field("parameters", optional($.parameter_declaration_list)),
optional(seq("->", field("return_type", $.type_expression))),
field("pragmas", optional($.pragma_list)),
":",
field("body", $.statement_list)
),
/* Call expressions */
_call_extended: $ =>
choice($._command_statement, $._call_block, $._dot_generic_call_block),
_command_statement: $ =>
seq(
field("function", $._basic_expression),
alias($._command_statement_argument_list, $.argument_list)
),
_command_statement_argument_list: $ =>
prec.right(
seq(
$._equal_expression_list,
optional(
seq(":", $.statement_list, optional($._post_expression_block_tail))
)
)
),
_command_block: $ =>
seq(
field("function", $._basic_expression),
alias($._command_block_argument_list, $.argument_list)
),
_command_block_argument_list: $ =>
prec.right(
seq(
$._command_expression_argument_list,
":",
$.statement_list,
optional($._post_expression_block_tail)
)
),
_dot_generic_call_block: $ =>
seq(
$._dot_generic_head,
alias($._call_block_argument_list, $.argument_list)
),
_call_block: $ =>
seq(
field("function", $._basic_expression),
alias($._call_block_argument_list, $.argument_list)
),
_call_block_argument_list: $ =>
seq(optional($._call_argument_list), $._post_expression_block),
_dot_generic_call_do: $ =>
seq(
$._dot_generic_head,
alias($._call_do_argument_list, $.argument_list)