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+This is m4.info, produced by makeinfo version 5.1 from m4.texi.
+
+This manual (22 September 2013) is for GNU M4 (version 1.4.17), a
+package containing an implementation of the m4 macro language.
+
+ Copyright (C) 1989-1994, 2004-2013 Free Software Foundation, Inc.
+
+ Permission is granted to copy, distribute and/or modify this
+ document under the terms of the GNU Free Documentation License,
+ Version 1.3 or any later version published by the Free Software
+ Foundation; with no Invariant Sections, no Front-Cover Texts, and
+ no Back-Cover Texts. A copy of the license is included in the
+ section entitled "GNU Free Documentation License."
+INFO-DIR-SECTION Text creation and manipulation
+START-INFO-DIR-ENTRY
+* M4: (m4). A powerful macro processor.
+END-INFO-DIR-ENTRY
+
+
+File: m4.info, Node: Copying This Manual, Next: Indices, Prev: Copying This Package, Up: Top
+
+Appendix B How to make copies of this manual
+********************************************
+
+This appendix covers the license for copying this manual. Note that
+some of the longer examples in this manual are also distributed in the
+directory 'm4-1.4.17/examples/', where a more permissive license is in
+effect when copying just the examples.
+
+* Menu:
+
+* GNU Free Documentation License:: License for copying this manual
+
+
+File: m4.info, Node: GNU Free Documentation License, Up: Copying This Manual
+
+B.1 License for copying this manual
+===================================
+
+ Version 1.3, 3 November 2008
+
+ Copyright (C) 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
+ <http://fsf.org/>
+
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+ 0. PREAMBLE
+
+ The purpose of this License is to make a manual, textbook, or other
+ functional and useful document "free" in the sense of freedom: to
+ assure everyone the effective freedom to copy and redistribute it,
+ with or without modifying it, either commercially or
+ noncommercially. Secondarily, this License preserves for the
+ author and publisher a way to get credit for their work, while not
+ being considered responsible for modifications made by others.
+
+ This License is a kind of "copyleft", which means that derivative
+ works of the document must themselves be free in the same sense.
+ It complements the GNU General Public License, which is a copyleft
+ license designed for free software.
+
+ We have designed this License in order to use it for manuals for
+ free software, because free software needs free documentation: a
+ free program should come with manuals providing the same freedoms
+ that the software does. But this License is not limited to
+ software manuals; it can be used for any textual work, regardless
+ of subject matter or whether it is published as a printed book. We
+ recommend this License principally for works whose purpose is
+ instruction or reference.
+
+ 1. APPLICABILITY AND DEFINITIONS
+
+ This License applies to any manual or other work, in any medium,
+ that contains a notice placed by the copyright holder saying it can
+ be distributed under the terms of this License. Such a notice
+ grants a world-wide, royalty-free license, unlimited in duration,
+ to use that work under the conditions stated herein. The
+ "Document", below, refers to any such manual or work. Any member
+ of the public is a licensee, and is addressed as "you". You accept
+ the license if you copy, modify or distribute the work in a way
+ requiring permission under copyright law.
+
+ A "Modified Version" of the Document means any work containing the
+ Document or a portion of it, either copied verbatim, or with
+ modifications and/or translated into another language.
+
+ A "Secondary Section" is a named appendix or a front-matter section
+ of the Document that deals exclusively with the relationship of the
+ publishers or authors of the Document to the Document's overall
+ subject (or to related matters) and contains nothing that could
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+ is in part a textbook of mathematics, a Secondary Section may not
+ explain any mathematics.) The relationship could be a matter of
+ historical connection with the subject or with related matters, or
+ of legal, commercial, philosophical, ethical or political position
+ regarding them.
+
+ The "Invariant Sections" are certain Secondary Sections whose
+ titles are designated, as being those of Invariant Sections, in the
+ notice that says that the Document is released under this License.
+ If a section does not fit the above definition of Secondary then it
+ is not allowed to be designated as Invariant. The Document may
+ contain zero Invariant Sections. If the Document does not identify
+ any Invariant Sections then there are none.
+
+ The "Cover Texts" are certain short passages of text that are
+ listed, as Front-Cover Texts or Back-Cover Texts, in the notice
+ that says that the Document is released under this License. A
+ Front-Cover Text may be at most 5 words, and a Back-Cover Text may
+ be at most 25 words.
+
+ A "Transparent" copy of the Document means a machine-readable copy,
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+ formatters or for automatic translation to a variety of formats
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+ Transparent file format whose markup, or absence of markup, has
+ been arranged to thwart or discourage subsequent modification by
+ readers is not Transparent. An image format is not Transparent if
+ used for any substantial amount of text. A copy that is not
+ "Transparent" is called "Opaque".
+
+ Examples of suitable formats for Transparent copies include plain
+ ASCII without markup, Texinfo input format, LaTeX input format,
+ SGML or XML using a publicly available DTD, and standard-conforming
+ simple HTML, PostScript or PDF designed for human modification.
+ Examples of transparent image formats include PNG, XCF and JPG.
+ Opaque formats include proprietary formats that can be read and
+ edited only by proprietary word processors, SGML or XML for which
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+
+ The "Title Page" means, for a printed book, the title page itself,
+ plus such following pages as are needed to hold, legibly, the
+ material this License requires to appear in the title page. For
+ works in formats which do not have any title page as such, "Title
+ Page" means the text near the most prominent appearance of the
+ work's title, preceding the beginning of the body of the text.
+
+ The "publisher" means any person or entity that distributes copies
+ of the Document to the public.
+
+ A section "Entitled XYZ" means a named subunit of the Document
+ whose title either is precisely XYZ or contains XYZ in parentheses
+ following text that translates XYZ in another language. (Here XYZ
+ stands for a specific section name mentioned below, such as
+ "Acknowledgements", "Dedications", "Endorsements", or "History".)
+ To "Preserve the Title" of such a section when you modify the
+ Document means that it remains a section "Entitled XYZ" according
+ to this definition.
+
+ The Document may include Warranty Disclaimers next to the notice
+ which states that this License applies to the Document. These
+ Warranty Disclaimers are considered to be included by reference in
+ this License, but only as regards disclaiming warranties: any other
+ implication that these Warranty Disclaimers may have is void and
+ has no effect on the meaning of this License.
+
+ 2. VERBATIM COPYING
+
+ You may copy and distribute the Document in any medium, either
+ commercially or noncommercially, provided that this License, the
+ copyright notices, and the license notice saying this License
+ applies to the Document are reproduced in all copies, and that you
+ add no other conditions whatsoever to those of this License. You
+ may not use technical measures to obstruct or control the reading
+ or further copying of the copies you make or distribute. However,
+ you may accept compensation in exchange for copies. If you
+ distribute a large enough number of copies you must also follow the
+ conditions in section 3.
+
+ You may also lend copies, under the same conditions stated above,
+ and you may publicly display copies.
+
+ 3. COPYING IN QUANTITY
+
+ If you publish printed copies (or copies in media that commonly
+ have printed covers) of the Document, numbering more than 100, and
+ the Document's license notice requires Cover Texts, you must
+ enclose the copies in covers that carry, clearly and legibly, all
+ these Cover Texts: Front-Cover Texts on the front cover, and
+ Back-Cover Texts on the back cover. Both covers must also clearly
+ and legibly identify you as the publisher of these copies. The
+ front cover must present the full title with all words of the title
+ equally prominent and visible. You may add other material on the
+ covers in addition. Copying with changes limited to the covers, as
+ long as they preserve the title of the Document and satisfy these
+ conditions, can be treated as verbatim copying in other respects.
+
+ If the required texts for either cover are too voluminous to fit
+ legibly, you should put the first ones listed (as many as fit
+ reasonably) on the actual cover, and continue the rest onto
+ adjacent pages.
+
+ If you publish or distribute Opaque copies of the Document
+ numbering more than 100, you must either include a machine-readable
+ Transparent copy along with each Opaque copy, or state in or with
+ each Opaque copy a computer-network location from which the general
+ network-using public has access to download using public-standard
+ network protocols a complete Transparent copy of the Document, free
+ of added material. If you use the latter option, you must take
+ reasonably prudent steps, when you begin distribution of Opaque
+ copies in quantity, to ensure that this Transparent copy will
+ remain thus accessible at the stated location until at least one
+ year after the last time you distribute an Opaque copy (directly or
+ through your agents or retailers) of that edition to the public.
+
+ It is requested, but not required, that you contact the authors of
+ the Document well before redistributing any large number of copies,
+ to give them a chance to provide you with an updated version of the
+ Document.
+
+ 4. MODIFICATIONS
+
+ You may copy and distribute a Modified Version of the Document
+ under the conditions of sections 2 and 3 above, provided that you
+ release the Modified Version under precisely this License, with the
+ Modified Version filling the role of the Document, thus licensing
+ distribution and modification of the Modified Version to whoever
+ possesses a copy of it. In addition, you must do these things in
+ the Modified Version:
+
+ A. Use in the Title Page (and on the covers, if any) a title
+ distinct from that of the Document, and from those of previous
+ versions (which should, if there were any, be listed in the
+ History section of the Document). You may use the same title
+ as a previous version if the original publisher of that
+ version gives permission.
+
+ B. List on the Title Page, as authors, one or more persons or
+ entities responsible for authorship of the modifications in
+ the Modified Version, together with at least five of the
+ principal authors of the Document (all of its principal
+ authors, if it has fewer than five), unless they release you
+ from this requirement.
+
+ C. State on the Title page the name of the publisher of the
+ Modified Version, as the publisher.
+
+ D. Preserve all the copyright notices of the Document.
+
+ E. Add an appropriate copyright notice for your modifications
+ adjacent to the other copyright notices.
+
+ F. Include, immediately after the copyright notices, a license
+ notice giving the public permission to use the Modified
+ Version under the terms of this License, in the form shown in
+ the Addendum below.
+
+ G. Preserve in that license notice the full lists of Invariant
+ Sections and required Cover Texts given in the Document's
+ license notice.
+
+ H. Include an unaltered copy of this License.
+
+ I. Preserve the section Entitled "History", Preserve its Title,
+ and add to it an item stating at least the title, year, new
+ authors, and publisher of the Modified Version as given on the
+ Title Page. If there is no section Entitled "History" in the
+ Document, create one stating the title, year, authors, and
+ publisher of the Document as given on its Title Page, then add
+ an item describing the Modified Version as stated in the
+ previous sentence.
+
+ J. Preserve the network location, if any, given in the Document
+ for public access to a Transparent copy of the Document, and
+ likewise the network locations given in the Document for
+ previous versions it was based on. These may be placed in the
+ "History" section. You may omit a network location for a work
+ that was published at least four years before the Document
+ itself, or if the original publisher of the version it refers
+ to gives permission.
+
+ K. For any section Entitled "Acknowledgements" or "Dedications",
+ Preserve the Title of the section, and preserve in the section
+ all the substance and tone of each of the contributor
+ acknowledgements and/or dedications given therein.
+
+ L. Preserve all the Invariant Sections of the Document, unaltered
+ in their text and in their titles. Section numbers or the
+ equivalent are not considered part of the section titles.
+
+ M. Delete any section Entitled "Endorsements". Such a section
+ may not be included in the Modified Version.
+
+ N. Do not retitle any existing section to be Entitled
+ "Endorsements" or to conflict in title with any Invariant
+ Section.
+
+ O. Preserve any Warranty Disclaimers.
+
+ If the Modified Version includes new front-matter sections or
+ appendices that qualify as Secondary Sections and contain no
+ material copied from the Document, you may at your option designate
+ some or all of these sections as invariant. To do this, add their
+ titles to the list of Invariant Sections in the Modified Version's
+ license notice. These titles must be distinct from any other
+ section titles.
+
+ You may add a section Entitled "Endorsements", provided it contains
+ nothing but endorsements of your Modified Version by various
+ parties--for example, statements of peer review or that the text
+ has been approved by an organization as the authoritative
+ definition of a standard.
+
+ You may add a passage of up to five words as a Front-Cover Text,
+ and a passage of up to 25 words as a Back-Cover Text, to the end of
+ the list of Cover Texts in the Modified Version. Only one passage
+ of Front-Cover Text and one of Back-Cover Text may be added by (or
+ through arrangements made by) any one entity. If the Document
+ already includes a cover text for the same cover, previously added
+ by you or by arrangement made by the same entity you are acting on
+ behalf of, you may not add another; but you may replace the old
+ one, on explicit permission from the previous publisher that added
+ the old one.
+
+ The author(s) and publisher(s) of the Document do not by this
+ License give permission to use their names for publicity for or to
+ assert or imply endorsement of any Modified Version.
+
+ 5. COMBINING DOCUMENTS
+
+ You may combine the Document with other documents released under
+ this License, under the terms defined in section 4 above for
+ modified versions, provided that you include in the combination all
+ of the Invariant Sections of all of the original documents,
+ unmodified, and list them all as Invariant Sections of your
+ combined work in its license notice, and that you preserve all
+ their Warranty Disclaimers.
+
+ The combined work need only contain one copy of this License, and
+ multiple identical Invariant Sections may be replaced with a single
+ copy. If there are multiple Invariant Sections with the same name
+ but different contents, make the title of each such section unique
+ by adding at the end of it, in parentheses, the name of the
+ original author or publisher of that section if known, or else a
+ unique number. Make the same adjustment to the section titles in
+ the list of Invariant Sections in the license notice of the
+ combined work.
+
+ In the combination, you must combine any sections Entitled
+ "History" in the various original documents, forming one section
+ Entitled "History"; likewise combine any sections Entitled
+ "Acknowledgements", and any sections Entitled "Dedications". You
+ must delete all sections Entitled "Endorsements."
+
+ 6. COLLECTIONS OF DOCUMENTS
+
+ You may make a collection consisting of the Document and other
+ documents released under this License, and replace the individual
+ copies of this License in the various documents with a single copy
+ that is included in the collection, provided that you follow the
+ rules of this License for verbatim copying of each of the documents
+ in all other respects.
+
+ You may extract a single document from such a collection, and
+ distribute it individually under this License, provided you insert
+ a copy of this License into the extracted document, and follow this
+ License in all other respects regarding verbatim copying of that
+ document.
+
+ 7. AGGREGATION WITH INDEPENDENT WORKS
+
+ A compilation of the Document or its derivatives with other
+ separate and independent documents or works, in or on a volume of a
+ storage or distribution medium, is called an "aggregate" if the
+ copyright resulting from the compilation is not used to limit the
+ legal rights of the compilation's users beyond what the individual
+ works permit. When the Document is included in an aggregate, this
+ License does not apply to the other works in the aggregate which
+ are not themselves derivative works of the Document.
+
+ If the Cover Text requirement of section 3 is applicable to these
+ copies of the Document, then if the Document is less than one half
+ of the entire aggregate, the Document's Cover Texts may be placed
+ on covers that bracket the Document within the aggregate, or the
+ electronic equivalent of covers if the Document is in electronic
+ form. Otherwise they must appear on printed covers that bracket
+ the whole aggregate.
+
+ 8. TRANSLATION
+
+ Translation is considered a kind of modification, so you may
+ distribute translations of the Document under the terms of section
+ 4. Replacing Invariant Sections with translations requires special
+ permission from their copyright holders, but you may include
+ translations of some or all Invariant Sections in addition to the
+ original versions of these Invariant Sections. You may include a
+ translation of this License, and all the license notices in the
+ Document, and any Warranty Disclaimers, provided that you also
+ include the original English version of this License and the
+ original versions of those notices and disclaimers. In case of a
+ disagreement between the translation and the original version of
+ this License or a notice or disclaimer, the original version will
+ prevail.
+
+ If a section in the Document is Entitled "Acknowledgements",
+ "Dedications", or "History", the requirement (section 4) to
+ Preserve its Title (section 1) will typically require changing the
+ actual title.
+
+ 9. TERMINATION
+
+ You may not copy, modify, sublicense, or distribute the Document
+ except as expressly provided under this License. Any attempt
+ otherwise to copy, modify, sublicense, or distribute it is void,
+ and will automatically terminate your rights under this License.
+
+ However, if you cease all violation of this License, then your
+ license from a particular copyright holder is reinstated (a)
+ provisionally, unless and until the copyright holder explicitly and
+ finally terminates your license, and (b) permanently, if the
+ copyright holder fails to notify you of the violation by some
+ reasonable means prior to 60 days after the cessation.
+
+ Moreover, your license from a particular copyright holder is
+ reinstated permanently if the copyright holder notifies you of the
+ violation by some reasonable means, this is the first time you have
+ received notice of violation of this License (for any work) from
+ that copyright holder, and you cure the violation prior to 30 days
+ after your receipt of the notice.
+
+ Termination of your rights under this section does not terminate
+ the licenses of parties who have received copies or rights from you
+ under this License. If your rights have been terminated and not
+ permanently reinstated, receipt of a copy of some or all of the
+ same material does not give you any rights to use it.
+
+ 10. FUTURE REVISIONS OF THIS LICENSE
+
+ The Free Software Foundation may publish new, revised versions of
+ the GNU Free Documentation License from time to time. Such new
+ versions will be similar in spirit to the present version, but may
+ differ in detail to address new problems or concerns. See
+ <http://www.gnu.org/copyleft/>.
+
+ Each version of the License is given a distinguishing version
+ number. If the Document specifies that a particular numbered
+ version of this License "or any later version" applies to it, you
+ have the option of following the terms and conditions either of
+ that specified version or of any later version that has been
+ published (not as a draft) by the Free Software Foundation. If the
+ Document does not specify a version number of this License, you may
+ choose any version ever published (not as a draft) by the Free
+ Software Foundation. If the Document specifies that a proxy can
+ decide which future versions of this License can be used, that
+ proxy's public statement of acceptance of a version permanently
+ authorizes you to choose that version for the Document.
+
+ 11. RELICENSING
+
+ "Massive Multiauthor Collaboration Site" (or "MMC Site") means any
+ World Wide Web server that publishes copyrightable works and also
+ provides prominent facilities for anybody to edit those works. A
+ public wiki that anybody can edit is an example of such a server.
+ A "Massive Multiauthor Collaboration" (or "MMC") contained in the
+ site means any set of copyrightable works thus published on the MMC
+ site.
+
+ "CC-BY-SA" means the Creative Commons Attribution-Share Alike 3.0
+ license published by Creative Commons Corporation, a not-for-profit
+ corporation with a principal place of business in San Francisco,
+ California, as well as future copyleft versions of that license
+ published by that same organization.
+
+ "Incorporate" means to publish or republish a Document, in whole or
+ in part, as part of another Document.
+
+ An MMC is "eligible for relicensing" if it is licensed under this
+ License, and if all works that were first published under this
+ License somewhere other than this MMC, and subsequently
+ incorporated in whole or in part into the MMC, (1) had no cover
+ texts or invariant sections, and (2) were thus incorporated prior
+ to November 1, 2008.
+
+ The operator of an MMC Site may republish an MMC contained in the
+ site under CC-BY-SA on the same site at any time before August 1,
+ 2009, provided the MMC is eligible for relicensing.
+
+ADDENDUM: How to use this License for your documents
+====================================================
+
+To use this License in a document you have written, include a copy of
+the License in the document and put the following copyright and license
+notices just after the title page:
+
+ Copyright (C) YEAR YOUR NAME.
+ Permission is granted to copy, distribute and/or modify this document
+ under the terms of the GNU Free Documentation License, Version 1.3
+ or any later version published by the Free Software Foundation;
+ with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
+ Texts. A copy of the license is included in the section entitled ``GNU
+ Free Documentation License''.
+
+ If you have Invariant Sections, Front-Cover Texts and Back-Cover
+Texts, replace the "with...Texts." line with this:
+
+ with the Invariant Sections being LIST THEIR TITLES, with
+ the Front-Cover Texts being LIST, and with the Back-Cover Texts
+ being LIST.
+
+ If you have Invariant Sections without Cover Texts, or some other
+combination of the three, merge those two alternatives to suit the
+situation.
+
+ If your document contains nontrivial examples of program code, we
+recommend releasing these examples in parallel under your choice of free
+software license, such as the GNU General Public License, to permit
+their use in free software.
+
+
+File: m4.info, Node: Indices, Prev: Copying This Manual, Up: Top
+
+Appendix C Indices of concepts and macros
+*****************************************
+
+* Menu:
+
+* Macro index:: Index for all 'm4' macros
+* Concept index:: Index for many concepts
+
+
+File: m4.info, Node: Macro index, Next: Concept index, Up: Indices
+
+C.1 Index for all 'm4' macros
+=============================
+
+This index covers all 'm4' builtins, as well as several useful composite
+macros. References are exclusively to the places where a macro is
+introduced the first time.
+
+
+* Menu:
+
+* __file__: Location. (line 9)
+* __gnu__: Platform macros. (line 11)
+* __line__: Location. (line 10)
+* __os2__: Platform macros. (line 12)
+* __program__: Location. (line 11)
+* __unix__: Platform macros. (line 14)
+* __windows__: Platform macros. (line 16)
+* argn: Shift. (line 255)
+* array: Define. (line 55)
+* array_set: Define. (line 56)
+* builtin: Builtin. (line 8)
+* capitalize: Patsubst. (line 54)
+* changecom: Changecom. (line 9)
+* changequote: Changequote. (line 9)
+* changeword: Changeword. (line 22)
+* cleardivert: Cleardivert. (line 25)
+* cond: Shift. (line 51)
+* copy: Composition. (line 119)
+* curry: Composition. (line 67)
+* debugfile: Debug Output. (line 10)
+* debugmode: Debug Levels. (line 77)
+* decr: Incr. (line 10)
+* define: Define. (line 9)
+* define_blind: Composition. (line 10)
+* defn: Defn. (line 9)
+* divert: Divert. (line 8)
+* divnum: Divnum. (line 8)
+* dnl: Dnl. (line 8)
+* downcase: Patsubst. (line 53)
+* dquote: Shift. (line 193)
+* dquote_elt: Shift. (line 194)
+* dumpdef: Dumpdef. (line 9)
+* errprint: Errprint. (line 8)
+* esyscmd: Esyscmd. (line 8)
+* eval: Eval. (line 8)
+* example: Manual. (line 39)
+* exch: Arguments. (line 12)
+* fatal_error: M4exit. (line 24)
+* foreach: Foreach. (line 8)
+* foreachq: Foreach. (line 9)
+* forloop: Forloop. (line 8)
+* format: Format. (line 8)
+* ifdef: Ifdef. (line 9)
+* ifelse: Ifelse. (line 10)
+* ifelse <1>: Ifelse. (line 11)
+* ifelse <2>: Ifelse. (line 12)
+* include: Include. (line 8)
+* incr: Incr. (line 9)
+* index: Index macro. (line 8)
+* indir: Indir. (line 8)
+* join: Shift. (line 101)
+* joinall: Shift. (line 102)
+* len: Len. (line 8)
+* m4exit: M4exit. (line 9)
+* m4wrap: M4wrap. (line 13)
+* maketemp: Mkstemp. (line 11)
+* mkstemp: Mkstemp. (line 10)
+* nargs: Pseudo Arguments. (line 12)
+* os2: Platform macros. (line 13)
+* patsubst: Patsubst. (line 8)
+* popdef: Pushdef. (line 11)
+* pushdef: Pushdef. (line 10)
+* quote: Shift. (line 192)
+* regexp: Regexp. (line 8)
+* rename: Composition. (line 120)
+* reverse: Shift. (line 31)
+* shift: Shift. (line 16)
+* sinclude: Include. (line 9)
+* stack_foreach: Stacks. (line 11)
+* stack_foreach_lifo: Stacks. (line 12)
+* stack_foreach_sep: Improved copy. (line 15)
+* stack_foreach_sep_lifo: Improved copy. (line 16)
+* substr: Substr. (line 8)
+* syscmd: Syscmd. (line 8)
+* sysval: Sysval. (line 8)
+* traceoff: Trace. (line 10)
+* traceon: Trace. (line 9)
+* translit: Translit. (line 8)
+* undefine: Undefine. (line 8)
+* undivert: Undivert. (line 8)
+* unix: Platform macros. (line 15)
+* upcase: Patsubst. (line 52)
+* windows: Platform macros. (line 17)
+
+
+File: m4.info, Node: Concept index, Prev: Macro index, Up: Indices
+
+C.2 Index for many concepts
+===========================
+
+
+* Menu:
+
+* argument currying: Composition. (line 63)
+* arguments to macros: Macro Arguments. (line 6)
+* arguments to macros <1>: Arguments. (line 6)
+* arguments to macros, special: Pseudo Arguments. (line 6)
+* arguments, joining: Shift. (line 98)
+* arguments, more than nine: Arguments. (line 54)
+* arguments, more than nine <1>: Shift. (line 250)
+* arguments, more than nine <2>: Improved foreach. (line 156)
+* arguments, quoted macro: Quoting Arguments. (line 6)
+* arguments, reversing: Shift. (line 31)
+* arithmetic: Arithmetic. (line 6)
+* arrays: Define. (line 52)
+* avoiding quadratic behavior: Improved foreach. (line 38)
+* basic regular expressions: Regexp. (line 6)
+* basic regular expressions <1>: Patsubst. (line 6)
+* blind macro: Inhibiting Invocation.
+ (line 13)
+* blind macro <1>: Ifelse. (line 52)
+* blind macro <2>: Composition. (line 10)
+* bug reports: Bugs. (line 6)
+* builtins, indirect call of: Builtin. (line 6)
+* builtins, special tokens: Defn. (line 101)
+* call of builtins, indirect: Builtin. (line 6)
+* call of macros, indirect: Indir. (line 6)
+* case statement: Ifelse. (line 69)
+* changing comment delimiters: Changecom. (line 6)
+* changing quote delimiters: Changequote. (line 6)
+* changing syntax: Changeword. (line 6)
+* characters, translating: Translit. (line 6)
+* command line: Invoking m4. (line 6)
+* command line, file names on the: Command line files. (line 6)
+* command line, macro definitions on the: Preprocessor features.
+ (line 6)
+* command line, options: Invoking m4. (line 10)
+* commands, exit status from shell: Sysval. (line 6)
+* commands, running shell: Shell commands. (line 6)
+* comment delimiters, changing: Changecom. (line 6)
+* comments: Comments. (line 6)
+* comments, copied to output: Changecom. (line 29)
+* comparing strings: Ifelse. (line 6)
+* compatibility: Compatibility. (line 6)
+* composing macros: Composition. (line 6)
+* concatenating arguments: Shift. (line 98)
+* conditional, short-circuiting: Shift. (line 51)
+* conditionals: Ifdef. (line 6)
+* controlling debugging output: Debug Levels. (line 6)
+* copying macros: Composition. (line 116)
+* counting loops: Forloop. (line 6)
+* currying arguments: Composition. (line 63)
+* debugging macros: Debugging. (line 6)
+* debugging output, controlling: Debug Levels. (line 6)
+* debugging output, saving: Debug Output. (line 6)
+* decrement operator: Incr. (line 6)
+* deferring expansion: M4wrap. (line 6)
+* deferring output: Diversions. (line 6)
+* defining new macros: Definitions. (line 6)
+* definition stack: Pushdef. (line 6)
+* definition stack <1>: Stacks. (line 6)
+* definitions, displaying macro: Defn. (line 6)
+* definitions, displaying macro <1>: Dumpdef. (line 6)
+* deleting macros: Undefine. (line 6)
+* deleting whitespace in input: Dnl. (line 6)
+* delimiters, changing: Changequote. (line 6)
+* delimiters, changing <1>: Changecom. (line 6)
+* discarding diverted text: Cleardivert. (line 6)
+* discarding input: Ifelse. (line 6)
+* discarding input <1>: Dnl. (line 6)
+* discarding input <2>: Divert. (line 42)
+* displaying macro definitions: Dumpdef. (line 6)
+* diversion numbers: Divnum. (line 6)
+* diverted text, discarding: Cleardivert. (line 6)
+* diverting output to files: Divert. (line 6)
+* dumping into frozen file: Using frozen files. (line 6)
+* error messages, printing: Errprint. (line 6)
+* errors, fatal: Operation modes. (line 19)
+* evaluation, of integer expressions: Eval. (line 6)
+* examples, understanding: Manual. (line 6)
+* executing shell commands: Shell commands. (line 6)
+* exit status from shell commands: Sysval. (line 6)
+* exiting from 'm4': M4exit. (line 6)
+* expansion of macros: Macro expansion. (line 6)
+* expansion, deferring: M4wrap. (line 6)
+* expansion, tracing macro: Trace. (line 6)
+* expressions, evaluation of integer: Eval. (line 6)
+* expressions, regular: Regexp. (line 6)
+* expressions, regular <1>: Patsubst. (line 6)
+* extracting substrings: Substr. (line 6)
+* fast loading of frozen files: Using frozen files. (line 6)
+* fatal errors: Operation modes. (line 19)
+* FDL, GNU Free Documentation License: GNU Free Documentation License.
+ (line 6)
+* file format, frozen file: Frozen file format. (line 6)
+* file inclusion: File Inclusion. (line 6)
+* file inclusion <1>: Undivert. (line 13)
+* file inclusion <2>: Undivert. (line 89)
+* file names, on the command line: Command line files. (line 6)
+* files, diverting output to: Divert. (line 6)
+* files, names of temporary: Mkstemp. (line 6)
+* for each loops: Foreach. (line 6)
+* for loops: Forloop. (line 6)
+* formatted output: Format. (line 6)
+* Free Documentation License (FDL), GNU: GNU Free Documentation License.
+ (line 6)
+* frozen file format: Frozen file format. (line 6)
+* frozen files for fast loading: Using frozen files. (line 6)
+* General Public License (GPL), GNU: GNU General Public License.
+ (line 6)
+* GNU extensions: Inhibiting Invocation.
+ (line 13)
+* GNU extensions <1>: Define. (line 41)
+* GNU extensions <2>: Arguments. (line 54)
+* GNU extensions <3>: Indir. (line 6)
+* GNU extensions <4>: Builtin. (line 6)
+* GNU extensions <5>: Debug Levels. (line 74)
+* GNU extensions <6>: Debug Output. (line 6)
+* GNU extensions <7>: Search Path. (line 6)
+* GNU extensions <8>: Divert. (line 54)
+* GNU extensions <9>: Undivert. (line 13)
+* GNU extensions <10>: Undivert. (line 89)
+* GNU extensions <11>: Regexp. (line 6)
+* GNU extensions <12>: Patsubst. (line 6)
+* GNU extensions <13>: Format. (line 6)
+* GNU extensions <14>: Eval. (line 113)
+* GNU extensions <15>: Esyscmd. (line 6)
+* GNU extensions <16>: Mkstemp. (line 58)
+* GNU extensions <17>: Using frozen files. (line 6)
+* GNU extensions <18>: Extensions. (line 6)
+* GNU Free Documentation License: GNU Free Documentation License.
+ (line 6)
+* GNU General Public License: GNU General Public License.
+ (line 6)
+* GNU M4, history of: History. (line 6)
+* GPL, GNU General Public License: GNU General Public License.
+ (line 6)
+* history of 'm4': History. (line 6)
+* included files, search path for: Search Path. (line 6)
+* inclusion, of files: File Inclusion. (line 6)
+* inclusion, of files <1>: Undivert. (line 13)
+* inclusion, of files <2>: Undivert. (line 89)
+* increment operator: Incr. (line 6)
+* indirect call of builtins: Builtin. (line 6)
+* indirect call of macros: Indir. (line 6)
+* initialization, frozen state: Using frozen files. (line 6)
+* input location: Preprocessor features.
+ (line 28)
+* input location <1>: Location. (line 6)
+* input tokens: Syntax. (line 6)
+* input, discarding: Ifelse. (line 6)
+* input, discarding <1>: Dnl. (line 6)
+* input, discarding <2>: Divert. (line 42)
+* input, saving: M4wrap. (line 6)
+* integer arithmetic: Arithmetic. (line 6)
+* integer expression evaluation: Eval. (line 6)
+* invoking 'm4': Invoking m4. (line 6)
+* invoking macros: Invocation. (line 6)
+* iterating over lists: Foreach. (line 6)
+* joining arguments: Shift. (line 98)
+* length of strings: Len. (line 6)
+* lexical structure of words: Changeword. (line 6)
+* License, code: Copying This Package.
+ (line 6)
+* License, manual: Copying This Manual. (line 6)
+* limit, nesting: Limits control. (line 43)
+* literal output: Pseudo Arguments. (line 106)
+* local variables: Pushdef. (line 79)
+* location, input: Preprocessor features.
+ (line 28)
+* location, input <1>: Location. (line 6)
+* loops: Shift. (line 10)
+* loops, counting: Forloop. (line 6)
+* loops, list iteration: Foreach. (line 6)
+* 'M4PATH': Search Path. (line 9)
+* macro composition: Composition. (line 6)
+* macro definitions, on the command line: Preprocessor features.
+ (line 6)
+* macro expansion, tracing: Trace. (line 6)
+* macro invocation: Invocation. (line 6)
+* macro, blind: Inhibiting Invocation.
+ (line 13)
+* macro, blind <1>: Ifelse. (line 52)
+* macro, blind <2>: Composition. (line 10)
+* macros, arguments to: Macro Arguments. (line 6)
+* macros, arguments to <1>: Arguments. (line 6)
+* macros, copying: Composition. (line 116)
+* macros, debugging: Debugging. (line 6)
+* macros, displaying definitions: Defn. (line 6)
+* macros, displaying definitions <1>: Dumpdef. (line 6)
+* macros, expansion of: Macro expansion. (line 6)
+* macros, how to define new: Definitions. (line 6)
+* macros, how to delete: Undefine. (line 6)
+* macros, how to rename: Defn. (line 6)
+* macros, indirect call of: Indir. (line 6)
+* macros, quoted arguments to: Quoting Arguments. (line 6)
+* macros, recursive: Shift. (line 6)
+* macros, special arguments to: Pseudo Arguments. (line 6)
+* macros, temporary redefinition of: Pushdef. (line 6)
+* manipulating quotes: Shift. (line 189)
+* messages, printing error: Errprint. (line 6)
+* more than nine arguments: Arguments. (line 54)
+* more than nine arguments <1>: Shift. (line 250)
+* more than nine arguments <2>: Improved foreach. (line 156)
+* multibranches: Ifelse. (line 69)
+* names: Names. (line 6)
+* nesting limit: Limits control. (line 43)
+* nine arguments, more than: Arguments. (line 54)
+* nine arguments, more than <1>: Shift. (line 250)
+* nine arguments, more than <2>: Improved foreach. (line 156)
+* numbers: Manual. (line 57)
+* options, command line: Invoking m4. (line 10)
+* output, diverting to files: Divert. (line 6)
+* output, formatted: Format. (line 6)
+* output, literal: Pseudo Arguments. (line 106)
+* output, saving debugging: Debug Output. (line 6)
+* overview of 'm4': Intro. (line 6)
+* pattern substitution: Patsubst. (line 6)
+* platform macros: Platform macros. (line 6)
+* positional parameters, more than nine: Arguments. (line 54)
+* POSIX: Extensions. (line 6)
+* 'POSIXLY_CORRECT': Invoking m4. (line 10)
+* 'POSIXLY_CORRECT' <1>: Incompatibilities. (line 144)
+* preprocessor features: Preprocessor features.
+ (line 6)
+* printing error messages: Errprint. (line 6)
+* pushdef stack: Pushdef. (line 6)
+* pushdef stack <1>: Stacks. (line 6)
+* quadratic behavior, avoiding: Improved foreach. (line 38)
+* quote delimiters, changing: Changequote. (line 6)
+* quote manipulation: Shift. (line 189)
+* quoted macro arguments: Quoting Arguments. (line 6)
+* quoted string: Quoted strings. (line 6)
+* quoting rule of thumb: Quoting Arguments. (line 22)
+* recursive macros: Shift. (line 6)
+* redefinition of macros, temporary: Pushdef. (line 6)
+* regular expressions: Changeword. (line 6)
+* regular expressions <1>: Regexp. (line 6)
+* regular expressions <2>: Patsubst. (line 6)
+* reloading a frozen file: Using frozen files. (line 6)
+* renaming macros: Defn. (line 6)
+* renaming macros <1>: Composition. (line 116)
+* reporting bugs: Bugs. (line 6)
+* rescanning: Limits control. (line 56)
+* rescanning <1>: Inhibiting Invocation.
+ (line 86)
+* rescanning <2>: Pseudo Arguments. (line 106)
+* rescanning <3>: Defn. (line 61)
+* rescanning <4>: Other Incompatibilities.
+ (line 52)
+* reversing arguments: Shift. (line 31)
+* rule of thumb, quoting: Quoting Arguments. (line 22)
+* running shell commands: Shell commands. (line 6)
+* saving debugging output: Debug Output. (line 6)
+* saving input: M4wrap. (line 6)
+* search path for included files: Search Path. (line 6)
+* shell commands, exit status from: Sysval. (line 6)
+* shell commands, running: Shell commands. (line 6)
+* short-circuiting conditional: Shift. (line 51)
+* special arguments to macros: Pseudo Arguments. (line 6)
+* stack, macro definition: Pushdef. (line 6)
+* stack, macro definition <1>: Stacks. (line 6)
+* standard error, output to: Dumpdef. (line 6)
+* standard error, output to <1>: Trace. (line 6)
+* standard error, output to <2>: Errprint. (line 6)
+* status of shell commands: Sysval. (line 6)
+* status, setting 'm4' exit: M4exit. (line 6)
+* string, quoted: Quoted strings. (line 6)
+* strings, length of: Len. (line 6)
+* substitution by regular expression: Patsubst. (line 6)
+* substrings, extracting: Substr. (line 6)
+* substrings, locating: Index macro. (line 6)
+* suggestions, reporting: Bugs. (line 6)
+* suppressing warnings: Macro Arguments. (line 38)
+* switch statement: Ifelse. (line 69)
+* synchronization lines: Preprocessor features.
+ (line 28)
+* syntax, changing: Changeword. (line 6)
+* temporary file names: Mkstemp. (line 6)
+* temporary redefinition of macros: Pushdef. (line 6)
+* 'TMPDIR': Diversions. (line 10)
+* tokens: Syntax. (line 6)
+* tokens, builtin macro: Defn. (line 101)
+* tokens, special: Other tokens. (line 6)
+* tracing macro expansion: Trace. (line 6)
+* translating characters: Translit. (line 6)
+* undefining macros: Undefine. (line 6)
+* UNIX commands, exit status from: Sysval. (line 6)
+* UNIX commands, running: Shell commands. (line 6)
+* variables, local: Pushdef. (line 79)
+* warnings, suppressing: Macro Arguments. (line 38)
+* words: Names. (line 6)
+* words, lexical structure of: Changeword. (line 6)
+