pegisland/dist/src/PegParser.js

General PEG-based parser supporting island grammars with lake symbols

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.PegParser = void 0;
// Copyright (C) 2021- Katsumi Okuda.  All rights reserved.
const InitialPegBuilder_1 = require("./InitialPegBuilder");
const PackratParser_1 = require("./PackratParser");
const grammar = {
    grammar: ['', 'Spacing', ['+', 'Definition']],
    OptAnnotations: ['*', ['terminal', /@water\s*/]],
    Definition: [
        '',
        'OptAnnotations',
        'Identifier',
        'LEFT_ARROW',
        'Expression',
        ['?', 'SEMICOLON'],
    ],
    Expression: ['', 'Rewriting', ['*', ['', 'SLASH', 'Rewriting']]],
    Rewriting: ['', 'Sequence', ['?', ['', 'RIGHT_ARROW', 'String']]],
    Sequence: ['*', ['', 'Prefix', ['!', 'LEFT_ARROW']]],
    Prefix: ['', ['?', ['/', 'AND', 'NOT']], 'Suffix'],
    Suffix: [
        '',
        'Primary',
        [
            '?',
            [
                '/',
                ['', 'STAR_PLUS', 'Primary'],
                ['', 'PLUS_PLUS', 'Primary'],
                ['', 'COLON_NOT', 'Primary'],
                ['', 'COLON', 'Primary'],
                'QUESTION',
                'STAR',
                'PLUS',
            ],
        ],
    ],
    Primary: [
        '/',
        'Regexp',
        ['', 'LAKE_OPEN', 'Expression', 'LAKE_CLOSE'],
        'NamedIdentifier',
        ['', 'OPEN', 'Expression', 'CLOSE'],
        'String',
        'Class',
        'DOT',
    ],
    NamedIdentifier: [
        '',
        [
            '?',
            [
                '',
                ['terminal', /[a-zA-Z][a-zA-Z0-9_]*|<[a-zA-Z][a-zA-Z0-9_]*>/],
                ['terminal', /@/],
            ],
        ],
        'Identifier',
    ],
    Identifier: [
        '',
        ['terminal', /[a-zA-Z][a-zA-Z0-9_]*|<[a-zA-Z][a-zA-Z0-9_]*>/],
        'Spacing',
    ],
    String: [
        '',
        ['/', ['terminal', /"(\\.|[^"])+"/], ['terminal', /'(\\.|[^'])+'/]],
        'Spacing',
    ],
    Regexp: [
        '',
        ['/', ['terminal', /r"(\\.|[^"])+"/], ['terminal', /r'(\\.|[^'])+'/]],
        'Spacing',
    ],
    Class: ['', ['terminal', /\^?\[[^\]]+\]/], 'Spacing'],
    Char: [
        '/',
        ['terminal', /\\[nrt'"[\]\\]/],
        ['terminal', /\\[0-2][0-7][0-7]/],
        ['terminal', /\\[0-7][0-7]?/],
        ['terminal', /[^\\]/],
    ],
    LEFT_ARROW: ['', ['terminal', /[=]|<-/], 'Spacing'],
    RIGHT_ARROW: ['', ['terminal', /->/], 'Spacing'],
    SEMICOLON: ['', ['terminal', /;/], 'Spacing'],
    SLASH: ['', ['terminal', /\//], 'Spacing'],
    AND: ['', ['terminal', /&/], 'Spacing'],
    NOT: ['', ['terminal', /!/], 'Spacing'],
    QUESTION: ['', ['terminal', /\?/], 'Spacing'],
    STAR_PLUS: ['', ['terminal', /\*\+/], 'Spacing'],
    PLUS_PLUS: ['', ['terminal', /\+\+/], 'Spacing'],
    STAR: ['', ['terminal', /\*/], 'Spacing'],
    PLUS: ['', ['terminal', /\+/], 'Spacing'],
    OPEN: ['', ['terminal', /\(/], 'Spacing'],
    CLOSE: ['', ['terminal', /\)/], 'Spacing'],
    LAKE_OPEN: ['', ['terminal', /<</], 'Spacing'],
    LAKE_CLOSE: ['', ['terminal', />>/], 'Spacing'],
    DOT: ['', ['terminal', /\.|_/], 'Spacing'],
    COLON: ['', ['terminal', /:/], 'Spacing'],
    COLON_NOT: ['', ['terminal', /:!/], 'Spacing'],
    Spacing: ['*', ['/', 'Space', 'Comment']],
    Space: ['terminal', /\s+/],
    Comment: ['terminal', /\/\/.*?$/],
};
class PegParser {
    constructor() {
        const builder = new InitialPegBuilder_1.InitialPegBuilder();
        const rules = builder.build(grammar);
        this.pegInterpreter = new PackratParser_1.PackratParser(rules);
    }
    parse(s) {
        return this.pegInterpreter.parse(s, 'grammar');
    }
}
exports.PegParser = PegParser;
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