xref: /OpenGrok/opengrok-indexer/src/main/jflex/analysis/r/R.lexh (revision d219b4cea555a12b602d2d5518daa22134ad4879)
1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * See LICENSE.txt included in this distribution for the specific
9 * language governing permissions and limitations under the License.
10 *
11 * When distributing Covered Code, include this CDDL HEADER in each
12 * file and include the License file at LICENSE.txt.
13 * If applicable, add the following below this CDDL HEADER, with the
14 * fields enclosed by brackets "[]" replaced with your own identifying
15 * information: Portions Copyright [yyyy] [name of copyright owner]
16 *
17 * CDDL HEADER END
18 */
19
20/*
21 * Copyright (c) 2010, 2016, Oracle and/or its affiliates. All rights reserved.
22 * Portions Copyright (c) 2017, 2019-2020, Chris Fraire <cfraire@me.com>.
23 */
24
25MaybeWhsp     = {WhspChar}*
26
27Identifier = (\p{L} {idchar}* | "." [{idchar}--{decimal}] {idchar}*)
28idchar = [\p{L}{decimal}\._]
29
30Number = ({Numeric_literal} | {Fractional_literal} | {Hex_literal}) [Li]?
31Numeric_literal = {decimal}+ ("." {decimal}+)? ({expmark} {decimal}+)?
32Fractional_literal = "." {decimal}+ ({expmark} {decimal}+)?
33Hex_literal = 0[Xx]{hexdigit}+ ("." {hexdigit}+)? ([Pp] [-+]? {decimal}+)?
34decimal = [0-9]
35expmark = [eE] [\+\-]?
36hexdigit = [0-9a-fA-F]
37
38FileExt = [Rr] ([Dd][Aa][Tt][Aa] | [Dd][AaSs])?
39File = [a-zA-Z]{FNameChar}* "." {FileExt}
40
41/*
42 * YYINITIAL : base scanning state
43 * SCOMMENT : single-line comment
44 * QSTRING: literal string expression delimited by apostrophes
45 * STRING: literal string expression delimited by quotation marks
46 */
47%state SCOMMENT QSTRING STRING
48