/*---------------------------------------------------------
 * Copyright (C) Microsoft Corporation. All rights reserved.
 *--------------------------------------------------------*/
'use strict';
define(["require", "exports"], function (require, exports) {
    exports.language = {
        displayName: 'Lua',
        name: 'lua',
        defaultToken: '',
        lineComment: '--',
        blockCommentStart: '--[[',
        blockCommentEnd: ']]',
        keywords: [
            'and', 'break', 'do', 'else', 'elseif',
            'end', 'false', 'for', 'function', 'if',
            'in', 'local', 'nil', 'not', 'or',
            'repeat', 'return', 'then', 'true', 'until',
            'while'
        ],
        brackets: [
            { token: 'delimiter.bracket', open: '{', close: '}' },
            { token: 'delimiter.array', open: '[', close: ']' },
            { token: 'delimiter.parenthesis', open: '(', close: ')' }
        ],
        operators: [
            '+', '-', '*', '/', '%', '^', '#', '==', '~=', '<=', '>=', '<', '>', '=',
            ';', ':', ',', '.', '..', '...'
        ],
        // we include these common regular expressions
        symbols: /[=><!~?:&|+\-*\/\^%]+/,
        escapes: /\\(?:[abfnrtv\\"']|x[0-9A-Fa-f]{1,4}|u[0-9A-Fa-f]{4}|U[0-9A-Fa-f]{8})/,
        // The main tokenizer for our languages
        tokenizer: {
            root: [
                // identifiers and keywords
                [/[a-zA-Z_]\w*/, { cases: { '@keywords': { token: 'keyword.$0' },
                            '@default': 'identifier' } }],
                // whitespace
                { include: '@whitespace' },
                // keys
                [/(,)(\s*)([a-zA-Z_]\w*)(\s*)(:)(?!:)/, ['delimiter', '', 'key', '', 'delimiter']],
                [/({)(\s*)([a-zA-Z_]\w*)(\s*)(:)(?!:)/, ['@brackets', '', 'key', '', 'delimiter']],
                // delimiters and operators
                [/[{}()\[\]]/, '@brackets'],
                [/@symbols/, { cases: { '@operators': 'delimiter',
                            '@default': '' } }],
                // numbers
                [/\d*\.\d+([eE][\-+]?\d+)?/, 'number.float'],
                [/0[xX][0-9a-fA-F_]*[0-9a-fA-F]/, 'number.hex'],
                [/\d+?/, 'number'],
                // delimiter: after number because of .\d floats
                [/[;,.]/, 'delimiter'],
                // strings: recover on non-terminated strings
                [/"([^"\\]|\\.)*$/, 'string.invalid'],
                [/'([^'\\]|\\.)*$/, 'string.invalid'],
                [/"/, 'string', '@string."'],
                [/'/, 'string', '@string.\''],
            ],
            whitespace: [
                [/[ \t\r\n]+/, ''],
                [/--\[([=]*)\[/, 'comment', '@comment.$1'],
                [/--.*$/, 'comment'],
            ],
            comment: [
                [/[^\]]+/, 'comment'],
                [/\]([=]*)\]/, { cases: { '$1==$S2': { token: 'comment', next: '@pop' }, '@default': 'comment' } }],
                [/./, 'comment']
            ],
            string: [
                [/[^\\"']+/, 'string'],
                [/@escapes/, 'string.escape'],
                [/\\./, 'string.escape.invalid'],
                [/["']/, { cases: { '$#==$S2': { token: 'string', next: '@pop' },
                            '@default': 'string' } }]
            ],
        },
    };
});
