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@ -4,7 +4,6 @@ const PREC = {
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// https://introcs.cs.princeton.edu/java/11precedence/
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COMMENT: 0, // // /* */
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ASSIGN: 1, // = += -= *= /= %= &= ^= |= <<= >>= >>>=
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SWITCH_EXP: 1, // always prefer to parse switch as expression over statement
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DECL: 2,
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ELEMENT_VAL: 2,
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TERNARY: 3, // ?:
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@ -25,6 +24,7 @@ const PREC = {
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ARRAY: 16, // [Index]
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OBJ_ACCESS: 16, // .
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PARENS: 16, // (Expression)
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CLASS_LITERAL: 17, // .
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};
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module.exports = grammar({
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@ -66,8 +66,11 @@ module.exports = grammar({
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[$._unannotated_type, $.scoped_type_identifier],
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[$._unannotated_type, $.generic_type],
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[$.generic_type, $.primary_expression],
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[$.expression, $.statement],
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// Only conflicts in switch expressions
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[$.lambda_expression, $.primary_expression],
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[$.inferred_parameters, $.primary_expression],
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[$.class_literal, $.field_access],
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],
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word: $ => $.identifier,
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@ -88,7 +91,6 @@ module.exports = grammar({
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$.false,
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$.character_literal,
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$.string_literal,
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$.text_block,
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$.null_literal
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),
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@ -141,25 +143,59 @@ module.exports = grammar({
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false: $ => 'false',
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character_literal: $ => token(seq(
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"'",
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'\'',
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repeat1(choice(
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/[^\\'\n]/,
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/\\./,
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/\\\n/
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)),
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"'"
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'\''
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)),
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string_literal: $ => token(choice(
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seq('"', repeat(choice(/[^\\"\n]/, /\\(.|\n)/)), '"'),
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// TODO: support multiline string literals by debugging the following:
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// seq('"', repeat(choice(/[^\\"\n]/, /\\(.|\n)/)), '"', '+', /\n/, '"', repeat(choice(/[^\\"\n]/, /\\(.|\n)/)))
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string_literal: $ => choice($._string_literal, $._multiline_string_literal),
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_string_literal: $ => seq(
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'"',
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repeat(choice(
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$.string_fragment,
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$.escape_sequence,
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)),
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text_block: $ => token(choice(
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seq('"""', /\s*\n/, optional(repeat(choice(/[^\\"]/, /\\(.)/))), '"""'),
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'"'
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),
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_multiline_string_literal: $ => seq(
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'"""',
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repeat(choice(
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alias($._multiline_string_fragment, $.multiline_string_fragment),
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$._escape_sequence,
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)),
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'"""'
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),
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// Workaround to https://github.com/tree-sitter/tree-sitter/issues/1156
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// We give names to the token() constructs containing a regexp
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// so as to obtain a node in the CST.
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//
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string_fragment: $ =>
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token.immediate(prec(1, /[^"\\]+/)),
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_multiline_string_fragment: () =>
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prec.right(choice(
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/[^"]+/,
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seq(/"[^"]*/, repeat(/[^"]+/))
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)),
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_escape_sequence: $ =>
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choice(
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prec(2, token.immediate(seq('\\', /[^abfnrtvxu'\"\\\?]/))),
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prec(1, $.escape_sequence)
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),
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escape_sequence: () => token.immediate(seq(
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'\\',
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choice(
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/[^xu0-7]/,
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/[0-7]{1,3}/,
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/x[0-9a-fA-F]{2}/,
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/u[0-9a-fA-F]{4}/,
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/u{[0-9a-fA-F]+}/
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))),
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null_literal: $ => 'null',
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// Expressions
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@ -174,7 +210,7 @@ module.exports = grammar({
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$.primary_expression,
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$.unary_expression,
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$.cast_expression,
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prec(PREC.SWITCH_EXP, $.switch_expression),
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$.switch_expression,
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),
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cast_expression: $ => prec(PREC.CAST, seq(
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@ -227,12 +263,14 @@ module.exports = grammar({
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instanceof_expression: $ => prec(PREC.REL, seq(
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field('left', $.expression),
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'instanceof',
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field('right', $._type)
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optional('final'),
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field('right', $._type),
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field('name', optional(choice($.identifier, $._reserved_identifier)))
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)),
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lambda_expression: $ => seq(
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field('parameters', choice(
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$.identifier, $.formal_parameters, $.inferred_parameters
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$.identifier, $.formal_parameters, $.inferred_parameters, $._reserved_identifier
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)),
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'->',
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field('body', choice($.expression, $.block))
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@ -240,7 +278,7 @@ module.exports = grammar({
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inferred_parameters: $ => seq(
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'(',
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commaSep1($.identifier),
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commaSep1(choice($.identifier, $._reserved_identifier)),
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')'
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),
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@ -289,6 +327,7 @@ module.exports = grammar({
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array_creation_expression: $ => prec.right(seq(
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'new',
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repeat($._annotation),
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field('type', $._simple_type),
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choice(
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seq(
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@ -306,7 +345,7 @@ module.exports = grammar({
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parenthesized_expression: $ => seq('(', $.expression, ')'),
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class_literal: $ => seq($._unannotated_type, '.', 'class'),
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class_literal: $ => prec.dynamic(PREC.CLASS_LITERAL, seq($._unannotated_type, '.', 'class')),
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object_creation_expression: $ => choice(
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$._unqualified_object_creation_expression,
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@ -434,7 +473,7 @@ module.exports = grammar({
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$.continue_statement,
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$.return_statement,
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$.yield_statement,
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$.switch_expression, //switch statements and expressions are identical
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$.switch_expression, // switch statements and expressions are identical
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$.synchronized_statement,
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$.local_variable_declaration,
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$.throw_statement,
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@ -635,6 +674,7 @@ module.exports = grammar({
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$.package_declaration,
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$.import_declaration,
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$.class_declaration,
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$.record_declaration,
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$.interface_declaration,
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$.annotation_type_declaration,
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$.enum_declaration,
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@ -827,6 +867,7 @@ module.exports = grammar({
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$.field_declaration,
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$.record_declaration,
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$.method_declaration,
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$.compact_constructor_declaration, // For records.
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$.class_declaration,
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$.interface_declaration,
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$.annotation_type_declaration,
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@ -902,7 +943,9 @@ module.exports = grammar({
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optional($.modifiers),
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'record',
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field('name', $.identifier),
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optional(field('type_parameters', $.type_parameters)),
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field('parameters', $.formal_parameters),
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optional(field('interfaces', $.super_interfaces)),
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field('body', $.class_body)
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),
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@ -919,6 +962,7 @@ module.exports = grammar({
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$.constant_declaration,
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$.class_declaration,
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$.interface_declaration,
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$.enum_declaration,
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$.annotation_type_declaration
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)),
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'}'
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@ -962,6 +1006,7 @@ module.exports = grammar({
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$.method_declaration,
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$.class_declaration,
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$.interface_declaration,
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$.record_declaration,
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$.annotation_type_declaration,
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';'
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)),
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@ -1129,9 +1174,16 @@ module.exports = grammar({
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choice(field('body', $.block), ';')
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),
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compact_constructor_declaration: $ => seq(
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optional($.modifiers),
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field('name', $.identifier),
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field('body', $.block)
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),
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_reserved_identifier: $ => alias(choice(
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'open',
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'module'
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'module',
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'record'
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), $.identifier),
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this: $ => 'this',
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Wilfred Hughes