/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * See LICENSE.txt included in this distribution for the specific
 * language governing permissions and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at LICENSE.txt.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright (c) 2006, 2017, Oracle and/or its affiliates. All rights reserved.
 * Portions Copyright (c) 2017, 2019, Chris Fraire <cfraire@me.com>.
 */

/*
 * U+200C	ZERO WIDTH NON-JOINER
 * U+200D	ZERO WIDTH JOINER
 * Do not support \UnicodeEscapeSequence (yet?)
 */
Identifier = [\p{XID_Start}_$] [\p{XID_Continue}$\u{200C}\u{200D}]*

NumericLiteral = ({DecimalLiteral} | {BinaryIntegerLiteral} |
    {OctalIntegerLiteral} | {HexIntegerLiteral})

DecimalLiteral = ({DecimalIntegerLiteral} "." {ExponentPart}? |
    {DecimalIntegerLiteral} "." {DecimalDigits} {ExponentPart}? |
    "." {DecimalDigits} {ExponentPart}? |
    {DecimalIntegerLiteral} {ExponentPart}?)
/*
 * OpenGrok relaxes from the strict ECMA definition of
 *     DecimalIntegerLiteral::
 *         0
 *         NonZeroDigit DecimalDigits?
 * and thus does not bother supporting LegacyOctalIntegerLiteral,
 * NonOctalDecimalIntegerLiteral, or LegacyOctalLikeDecimalIntegerLiteral.
 */
DecimalIntegerLiteral = {DecimalDigits}
DecimalDigits = {DecimalDigit}+
DecimalDigit = [0123456789]
// NonZeroDigit = [123456789]
ExponentPart = {ExponentIndicator} {SignedInteger}
ExponentIndicator = [eE]
SignedInteger = ({DecimalDigits} | "+" {DecimalDigits} | "-" {DecimalDigits})

BinaryIntegerLiteral = "0" [bB] {BinaryDigits}
BinaryDigits = {BinaryDigit}+
BinaryDigit = [01]

OctalIntegerLiteral = "0" [oO] {OctalDigits}
OctalDigits = {OctalDigit}+
OctalDigit = [01234567]

HexIntegerLiteral = "0" [xX] {HexDigits}
HexDigits = {HexDigit}+
HexDigit = [0123456789abcdefABCDEF]

File = [a-zA-Z]{FNameChar}* "." ([Js][Ss] |
    [Pp][Rr][Oo][Pp][Ee][Rr][Tt][Ii][Ee][Ss] | [Pp][Rr][Oo][Pp][Ss] |
    [Xx][Mm][Ll] | [Cc][Oo][Nn][Ff] | [Tt][Xx][Tt] | [Hh][Tt][Mm][Ll]? |
    [Ii][Nn][Ii] | [Dd][Ii][Ff][Ff] | [Pp][Aa][Tt][Cc][Hh])

/*
 * STRING: double-quoted literal.
 * REGEXP: heuristically-detected regular expression bounded by "/" characters.
 * COMMENT: comment text bounded by "/*" and "*/" and not nestable per ECMA
 *     documentation.
 * SCOMMENT: comment text that ends at a line terminator.
 * QSTRING: single-quoted literal.
 * TEMPLATE: template literal bounded by "`" characters and supporting
 *     substitution.
 */
%state STRING REGEXP COMMENT SCOMMENT QSTRING TEMPLATE