\[\begin{split}\newcommand{\alors}{\textsf{then}} \newcommand{\alter}{\textsf{alter}} \newcommand{\as}{\kw{as}} \newcommand{\Assum}[3]{\kw{Assum}(#1)(#2:#3)} \newcommand{\bool}{\textsf{bool}} \newcommand{\case}{\kw{case}} \newcommand{\conc}{\textsf{conc}} \newcommand{\cons}{\textsf{cons}} \newcommand{\consf}{\textsf{consf}} \newcommand{\conshl}{\textsf{cons\_hl}} \newcommand{\Def}[4]{\kw{Def}(#1)(#2:=#3:#4)} \newcommand{\emptyf}{\textsf{emptyf}} \newcommand{\End}{\kw{End}} \newcommand{\kwend}{\kw{end}} \newcommand{\EqSt}{\textsf{EqSt}} \newcommand{\even}{\textsf{even}} \newcommand{\evenO}{\textsf{even}_\textsf{O}} \newcommand{\evenS}{\textsf{even}_\textsf{S}} \newcommand{\false}{\textsf{false}} \newcommand{\filter}{\textsf{filter}} \newcommand{\Fix}{\kw{Fix}} \newcommand{\fix}{\kw{fix}} \newcommand{\for}{\textsf{for}} \newcommand{\forest}{\textsf{forest}} \newcommand{\from}{\textsf{from}} \newcommand{\Functor}{\kw{Functor}} \newcommand{\haslength}{\textsf{has\_length}} \newcommand{\hd}{\textsf{hd}} \newcommand{\ident}{\textsf{ident}} \newcommand{\In}{\kw{in}} \newcommand{\Ind}[4]{\kw{Ind}[#2](#3:=#4)} \newcommand{\ind}[3]{\kw{Ind}~[#1]\left(#2\mathrm{~:=~}#3\right)} \newcommand{\Indp}[5]{\kw{Ind}_{#5}(#1)[#2](#3:=#4)} \newcommand{\Indpstr}[6]{\kw{Ind}_{#5}(#1)[#2](#3:=#4)/{#6}} \newcommand{\injective}{\kw{injective}} \newcommand{\kw}[1]{\textsf{#1}} \newcommand{\lb}{\lambda} \newcommand{\length}{\textsf{length}} \newcommand{\letin}[3]{\kw{let}~#1:=#2~\kw{in}~#3} \newcommand{\List}{\textsf{list}} \newcommand{\lra}{\longrightarrow} \newcommand{\Match}{\kw{match}} \newcommand{\Mod}[3]{{\kw{Mod}}({#1}:{#2}\,\zeroone{:={#3}})} \newcommand{\ModA}[2]{{\kw{ModA}}({#1}=={#2})} \newcommand{\ModS}[2]{{\kw{Mod}}({#1}:{#2})} \newcommand{\ModType}[2]{{\kw{ModType}}({#1}:={#2})} \newcommand{\mto}{.\;} \newcommand{\Nat}{\mathbb{N}} \newcommand{\nat}{\textsf{nat}} \newcommand{\Nil}{\textsf{nil}} \newcommand{\nilhl}{\textsf{nil\_hl}} \newcommand{\nO}{\textsf{O}} \newcommand{\node}{\textsf{node}} \newcommand{\nS}{\textsf{S}} \newcommand{\odd}{\textsf{odd}} \newcommand{\oddS}{\textsf{odd}_\textsf{S}} \newcommand{\ovl}[1]{\overline{#1}} \newcommand{\Pair}{\textsf{pair}} \newcommand{\plus}{\mathsf{plus}} \newcommand{\Prod}{\textsf{prod}} \newcommand{\SProp}{\textsf{SProp}} \newcommand{\Prop}{\textsf{Prop}} \newcommand{\return}{\kw{return}} \newcommand{\Set}{\textsf{Set}} \newcommand{\si}{\textsf{if}} \newcommand{\sinon}{\textsf{else}} \newcommand{\Sort}{\mathcal{S}} \newcommand{\Str}{\textsf{Stream}} \newcommand{\Struct}{\kw{Struct}} \newcommand{\subst}[3]{#1\{#2/#3\}} \newcommand{\tl}{\textsf{tl}} \newcommand{\tree}{\textsf{tree}} \newcommand{\trii}{\triangleright_\iota} \newcommand{\true}{\textsf{true}} \newcommand{\Type}{\textsf{Type}} \newcommand{\unfold}{\textsf{unfold}} \newcommand{\WEV}[3]{\mbox{$#1[] \vdash #2 \lra #3$}} \newcommand{\WEVT}[3]{\mbox{$#1[] \vdash #2 \lra$}\\ \mbox{$ #3$}} \newcommand{\WF}[2]{{\mathcal{W\!F}}(#1)[#2]} \newcommand{\WFE}[1]{\WF{E}{#1}} \newcommand{\WFT}[2]{#1[] \vdash {\mathcal{W\!F}}(#2)} \newcommand{\WFTWOLINES}[2]{{\mathcal{W\!F}}\begin{array}{l}(#1)\\\mbox{}[{#2}]\end{array}} \newcommand{\with}{\kw{with}} \newcommand{\WS}[3]{#1[] \vdash #2 <: #3} \newcommand{\WSE}[2]{\WS{E}{#1}{#2}} \newcommand{\WT}[4]{#1[#2] \vdash #3 : #4} \newcommand{\WTE}[3]{\WT{E}{#1}{#2}{#3}} \newcommand{\WTEG}[2]{\WTE{\Gamma}{#1}{#2}} \newcommand{\WTM}[3]{\WT{#1}{}{#2}{#3}} \newcommand{\zeroone}[1]{[{#1}]} \newcommand{\zeros}{\textsf{zeros}} \end{split}\]

Utilities

The distribution provides utilities to simplify some tedious works beside proof development, tactics writing or documentation.

Using Coq as a library

In previous versions, coqmktop was used to build custom toplevels - for example for better debugging or custom static linking. Nowadays, the preferred method is to use ocamlfind.

The most basic custom toplevel is built using:

% ocamlfind ocamlopt -thread -rectypes -linkall -linkpkg \
              -package coq.toplevel \
              topbin/coqtop_bin.ml -o my_toplevel.native

For example, to statically link Ltac, you can just do:

% ocamlfind ocamlopt -thread -rectypes -linkall -linkpkg \
              -package coq.toplevel,coq.plugins.ltac \
              topbin/coqtop_bin.ml -o my_toplevel.native

and similarly for other plugins.

Building a Coq project

As of today it is possible to build Coq projects using two tools:

  • coq_makefile, which is distributed by Coq and is based on generating a makefile,

  • Dune, the standard OCaml build tool, which, since version 1.9, supports building Coq libraries.

Building a Coq project with coq_makefile

The majority of Coq projects are very similar: a collection of .v files and eventually some .ml ones (a Coq plugin). The main piece of metadata needed in order to build the project are the command line options to coqc (e.g. -R, Q, -I, see command line options). Collecting the list of files and options is the job of the _CoqProject file.

A simple example of a _CoqProject file follows:

-R theories/ MyCode
-arg -w
-arg all
theories/foo.v
theories/bar.v
-I src/
src/baz.ml4
src/bazaux.ml
src/qux_plugin.mlpack

where options -R, -Q and -I are natively recognized, as well as file names. The lines of the form -arg foo are used in order to tell to literally pass an argument foo to coqc: in the example, this allows to pass the two-word option -w all (see command line options).

Currently, both CoqIDE and Proof-General (version ≥ 4.3pre) understand _CoqProject files and invoke Coq with the desired options.

The coq_makefile utility can be used to set up a build infrastructure for the Coq project based on makefiles. The recommended way of invoking coq_makefile is the following one:

coq_makefile -f _CoqProject -o CoqMakefile

Such command generates the following files:

CoqMakefile

is a generic makefile for GNU Make that provides targets to build the project (both .v and .ml* files), to install it system-wide in the coq-contrib directory (i.e. where Coq is installed) as well as to invoke coqdoc to generate HTML documentation.

CoqMakefile.conf

contains make variables assignments that reflect the contents of the _CoqProject file as well as the path relevant to Coq.

An optional file CoqMakefile.local can be provided by the user in order to extend CoqMakefile. In particular one can declare custom actions to be performed before or after the build process. Similarly one can customize the install target or even provide new targets. Extension points are documented in paragraph CoqMakefile.local.

The extensions of the files listed in _CoqProject is used in order to decide how to build them. In particular:

  • Coq files must use the .v extension

  • OCaml files must use the .ml or .mli extension

  • OCaml files that require pre processing for syntax extensions (like VERNAC EXTEND) must use the .ml4 extension

  • In order to generate a plugin one has to list all OCaml modules (i.e. Baz for baz.ml) in a .mlpack file (or .mllib file).

The use of .mlpack files has to be preferred over .mllib files, since it results in a “packed” plugin: All auxiliary modules (as Baz and Bazaux) are hidden inside the plugin’s "namespace" (Qux_plugin). This reduces the chances of begin unable to load two distinct plugins because of a clash in their auxiliary module names.

CoqMakefile.local

The optional file CoqMakefile.local is included by the generated file CoqMakefile. It can contain two kinds of directives.

Variable assignment

The variable must belong to the variables listed in the Parameters section of the generated makefile. Here we describe only few of them.

CAMLPKGS

can be used to specify third party findlib packages, and is passed to the OCaml compiler on building or linking of modules. Eg: -package yojson.

CAMLFLAGS

can be used to specify additional flags to the OCaml compiler, like -bin-annot or -w....

OCAMLWARN

it contains a default of -warn-error +a-3, useful to modify this setting; beware this is not recommended for projects in Coq's CI.

COQC, COQDEP, COQDOC

can be set in order to use alternative binaries (e.g. wrappers)

COQ_SRC_SUBDIRS

can be extended by including other paths in which *.cm* files are searched. For example COQ_SRC_SUBDIRS+=user-contrib/Unicoq lets you build a plugin containing OCaml code that depends on the OCaml code of Unicoq

COQFLAGS

override the flags passed to coqc. By default -q.

COQEXTRAFLAGS

extend the flags passed to coqc

COQCHKFLAGS

override the flags passed to coqchk. By default -silent -o.

COQCHKEXTRAFLAGS

extend the flags passed to coqchk

COQDOCFLAGS

override the flags passed to coqdoc. By default -interpolate -utf8.

COQDOCEXTRAFLAGS

extend the flags passed to coqdoc

Rule extension

The following makefile rules can be extended.

Example

pre-all::
        echo "This line is print before making the all target"
install-extra::
        cp ThisExtraFile /there/it/goes
pre-all::

run before the all target. One can use this to configure the project, or initialize sub modules or check dependencies are met.

post-all::

run after the all target. One can use this to run a test suite, or compile extracted code.

install-extra::

run after install. One can use this to install extra files.

install-doc::

One can use this to install extra doc.

uninstall::

uninstall-doc::

clean::

cleanall::

archclean::

merlin-hook::

One can append lines to the generated .merlin file extending this target.

Timing targets and performance testing

The generated Makefile supports the generation of two kinds of timing data: per-file build-times, and per-line times for an individual file.

The following targets and Makefile variables allow collection of per- file timing data:

  • TIMED=1

    passing this variable will cause make to emit a line describing the user-space build-time and peak memory usage for each file built.

    Note

    On Mac OS, this works best if you’ve installed gnu-time.

    Example

    For example, the output of make TIMED=1 may look like this:

    COQDEP Fast.v
COQDEP Slow.v
COQC Slow.v
Slow (user: 0.34 mem: 395448 ko)
COQC Fast.v
Fast (user: 0.01 mem: 45184 ko)
  • pretty-timed

    this target stores the output of make TIMED=1 into time-of-build.log, and displays a table of the times, sorted from slowest to fastest, which is also stored in time-of-build-pretty.log. If you want to construct the log for targets other than the default one, you can pass them via the variable TGTS, e.g., make pretty-timed TGTS="a.vo b.vo".

    Note

    This target will append to the timing log; if you want a fresh start, you must remove the filetime-of-build.log or run make cleanall.

    Example

    For example, the output of make pretty-timed may look like this:

    COQDEP Fast.v
COQDEP Slow.v
COQC Slow.v
Slow (user: 0.36 mem: 393912 ko)
COQC Fast.v
Fast (user: 0.05 mem: 45992 ko)
Time     | File Name
--------------------
0m00.41s | Total
--------------------
0m00.36s | Slow
0m00.05s | Fast
  • print-pretty-timed-diff

    this target builds a table of timing changes between two compilations; run make make-pretty-timed-before to build the log of the “before” times, and run make make-pretty-timed-after to build the log of the “after” times. The table is printed on the command line, and stored in time-of-build-both.log. This target is most useful for profiling the difference between two commits in a repository.

    Note

    This target requires python to build the table.

    Note

    The make-pretty-timed-before and make-pretty-timed-after targets will append to the timing log; if you want a fresh start, you must remove the files time-of-build-before.log and time-of-build-after.log or run make cleanall before building either the “before” or “after” targets.

    Note

    The table will be sorted first by absolute time differences rounded towards zero to a whole-number of seconds, then by times in the “after” column, and finally lexicographically by file name. This will put the biggest changes in either direction first, and will prefer sorting by build-time over subsecond changes in build time (which are frequently noise); lexicographic sorting forces an order on files which take effectively no time to compile.

    Example

    For example, the output table from make print-pretty-timed-diff may look like this:

    After    | File Name | Before   || Change    | % Change
--------------------------------------------------------
0m00.39s | Total     | 0m00.35s || +0m00.03s | +11.42%
--------------------------------------------------------
0m00.37s | Slow      | 0m00.01s || +0m00.36s | +3600.00%
0m00.02s | Fast      | 0m00.34s || -0m00.32s | -94.11%

The following targets and Makefile variables allow collection of per- line timing data:

  • TIMING=1

    passing this variable will cause make to use coqc -time to write to a .v.timing file for each .v file compiled, which contains line-by-line timing information.

    Example

    For example, running make all TIMING=1 may result in a file like this:

    Chars 0 - 26 [Require~Coq.ZArith.BinInt.] 0.157 secs (0.128u,0.028s)
Chars 27 - 68 [Declare~Reduction~comp~:=~vm_c...] 0. secs (0.u,0.s)
Chars 69 - 162 [Definition~foo0~:=~Eval~comp~i...] 0.153 secs (0.136u,0.019s)
Chars 163 - 208 [Definition~foo1~:=~Eval~comp~i...] 0.239 secs (0.236u,0.s)

  • print-pretty-single-time-diff

    print-pretty-single-time-diff BEFORE=path/to/file.v.before-timing AFTER=path/to/file.v.after-timing

    this target will make a sorted table of the per-line timing differences between the timing logs in the BEFORE and AFTER files, display it, and save it to the file specified by the TIME_OF_PRETTY_BUILD_FILE variable, which defaults to time-of-build-pretty.log. To generate the .v.before-timing or .v.after-timing files, you should pass TIMING=before or TIMING=after rather than TIMING=1.

    Note

    The sorting used here is the same as in the print-pretty-timed-diff target.

    Note

    This target requires python to build the table.

    Example

    For example, running print-pretty-single-time-diff might give a table like this:

    After     | Code                                                | Before    || Change    | % Change
---------------------------------------------------------------------------------------------------
0m00.50s  | Total                                               | 0m04.17s  || -0m03.66s | -87.96%
---------------------------------------------------------------------------------------------------
0m00.145s | Chars 069 - 162 [Definition~foo0~:=~Eval~comp~i...] | 0m00.192s || -0m00.04s | -24.47%
0m00.126s | Chars 000 - 026 [Require~Coq.ZArith.BinInt.]        | 0m00.143s || -0m00.01s | -11.88%
   N/A    | Chars 027 - 068 [Declare~Reduction~comp~:=~nati...] | 0m00.s    || +0m00.00s | N/A
0m00.s    | Chars 027 - 068 [Declare~Reduction~comp~:=~vm_c...] |    N/A    || +0m00.00s | N/A
0m00.231s | Chars 163 - 208 [Definition~foo1~:=~Eval~comp~i...] | 0m03.836s || -0m03.60s | -93.97%
  • all.timing.diff, path/to/file.v.timing.diff

    The path/to/file.v.timing.diff target will make a .v.timing.diff file for the corresponding .v file, with a table as would be generated by the print-pretty-single-time-diff target; it depends on having already made the corresponding .v.before-timing and .v.after-timing files, which can be made by passing TIMING=before and TIMING=after. The all.timing.diff target will make such timing difference files for all of the .v files that the Makefile knows about. It will fail if some .v.before-timing or .v.after-timing files don’t exist.

    Note

    This target requires python to build the table.

Reusing/extending the generated Makefile

Including the generated makefile with an include directive is discouraged. The contents of this file, including variable names and status of rules shall change in the future. Users are advised to include Makefile.conf or call a target of the generated Makefile as in make -f Makefile target from another Makefile.

One way to get access to all targets of the generated CoqMakefile is to have a generic target for invoking unknown targets.

Example

# KNOWNTARGETS will not be passed along to CoqMakefile
KNOWNTARGETS := CoqMakefile extra-stuff extra-stuff2
# KNOWNFILES will not get implicit targets from the final rule, and so
# depending on them won't invoke the submake
# Warning: These files get declared as PHONY, so any targets depending
# on them always get rebuilt
KNOWNFILES   := Makefile _CoqProject

.DEFAULT_GOAL := invoke-coqmakefile

CoqMakefile: Makefile _CoqProject
        $(COQBIN)coq_makefile -f _CoqProject -o CoqMakefile

invoke-coqmakefile: CoqMakefile
        $(MAKE) --no-print-directory -f CoqMakefile $(filter-out $(KNOWNTARGETS),$(MAKECMDGOALS))

.PHONY: invoke-coqmakefile $(KNOWNFILES)

####################################################################
##                      Your targets here                         ##
####################################################################

# This should be the last rule, to handle any targets not declared above
%: invoke-coqmakefile
        @true

Building a subset of the targets with -j

To build, say, two targets foo.vo and bar.vo in parallel one can use make only TGTS="foo.vo bar.vo" -j.

Note

make foo.vo bar.vo -j has a different meaning for the make utility, in particular it may build a shared prerequisite twice.

Note

For users of coq_makefile with version < 8.7

  • Support for "subdirectory" is deprecated. To perform actions before or after the build (like invoking make on a subdirectory) one can hook in pre-all and post-all extension points.

  • -extra-phony and -extra are deprecated. To provide additional target (.PHONY or not) please use CoqMakefile.local.

Building a Coq project with Dune

Note

The canonical documentation for the Coq Dune extension is maintained upstream; please refer to the Dune manual for up-to-date information.

Building a Coq project with Dune requires setting up a Dune project for your files. This involves adding a dune-project and pkg.opam file to the root (pkg.opam can be empty), and then providing dune files in the directories your .v files are placed. For the experimental version "0.1" of the Coq Dune language, Coq library stanzas look like:

(coqlib
 (name <module_prefix>)
 (public_name <package.lib_name>)
 (synopsis <text>)
 (modules <ordered_set_lang>)
 (libraries <ocaml_libraries>)
 (flags <coq_flags>))

This stanza will build all .v files in the given directory, wrapping the library under <module_prefix>. If you declare a <package.lib_name> a .install file for the library will be generated; the optional <modules> field allows you to filter the list of modules, and <libraries> allows to depend on ML plugins. For the moment, Dune relies on Coq's standard mechanisms (such as COQPATH) to locate installed Coq libraries.

By default Dune will skip .v files present in subdirectories. In order to enable the usual recursive organization of Coq projects add

(include_subdirs qualified)

to you dune file.

Once your project is set up, dune build will generate the pkg.install files and all the files necessary for the installation of your project.

Example

A typical stanza for a Coq plugin is split into two parts. An OCaml build directive, which is standard Dune:

(library
 (name equations_plugin)
 (public_name equations.plugin)
 (flags :standard -warn-error -3-9-27-32-33-50)
 (libraries coq.plugins.cc coq.plugins.extraction))

(rule
 (targets g_equations.ml)
 (deps (:pp-file g_equations.mlg))
 (action (run coqpp %{pp-file})))

And a Coq-specific part that depends on it via the libraries field:

(coqlib
 (name Equations) ; -R flag
 (public_name equations.Equations)
 (synopsis "Equations Plugin")
 (libraries coq.plugins.extraction equations.plugin)
 (modules :standard \ IdDec NoCycle)) ; exclude some modules that don't build

(include_subdirs qualified)

Computing Module dependencies

In order to compute module dependencies (to be used by make or dune), Coq provides the coqdep tool.

coqdep computes inter-module dependencies for Coq and OCaml programs, and prints the dependencies on the standard output in a format readable by make. When a directory is given as argument, it is recursively looked at.

Dependencies of Coq modules are computed by looking at Require commands (Require, Require Export, Require Import), but also at the command Declare ML Module.

Dependencies of OCaml modules are computed by looking at open commands and the dot notation module.value. However, this is done approximately and you are advised to use ocamldep instead for the OCaml module dependencies.

See the man page of coqdep for more details and options.

Both Dune and coq_makefile use coqdep to compute the dependencies among the files part of a Coq project.

Documenting Coq files with coqdoc

coqdoc is a documentation tool for the proof assistant Coq, similar to javadoc or ocamldoc. The task of coqdoc is

  1. to produce a nice LaTeX and/or HTML document from Coq source files, readable for a human and not only for the proof assistant;

  2. to help the user navigate his own (or third-party) sources.

Principles

Documentation is inserted into Coq files as special comments. Thus your files will compile as usual, whether you use coqdoc or not. coqdoc presupposes that the given Coq files are well-formed (at least lexically). Documentation starts with (**, followed by a space, and ends with *). The documentation format is inspired by Todd A. Coram’s Almost Free Text (AFT) tool: it is mainly ASCII text with some syntax-light controls, described below. coqdoc is robust: it shouldn’t fail, whatever the input is. But remember: “garbage in, garbage out”.

Coq material inside documentation.

Coq material is quoted between the delimiters [ and ]. Square brackets may be nested, the inner ones being understood as being part of the quoted code (thus you can quote a term like fun x => u by writing [fun x => u]). Inside quotations, the code is pretty-printed in the same way as it is in code parts.

Preformatted vernacular is enclosed by [[ and ]]. The former must be followed by a newline and the latter must follow a newline.

Pretty-printing.

coqdoc uses different faces for identifiers and keywords. The pretty- printing of Coq tokens (identifiers or symbols) can be controlled using one of the following commands:

(** printing  *token* %...LATEX...% #...html...# *)

or

(** printing  *token* $...LATEX math...$ #...html...# *)

It gives the LaTeX and HTML texts to be produced for the given Coq token. Either the LaTeX or the HTML rule may be omitted, causing the default pretty-printing to be used for this token.

The printing for one token can be removed with

(** remove printing  *token* *)

Initially, the pretty-printing table contains the following mapping:

->

→

<-

←

*

×

<=

≤

>=

≥

=>

⇒

<>

≠

<->

↔

|-

⊢

\/

∨

/\

∧

~

¬

Any of these can be overwritten or suppressed using the printing commands.

Note

The recognition of tokens is done by a (ocaml) lex automaton and thus applies the longest-match rule. For instance, ->~ is recognized as a single token, where Coq sees two tokens. It is the responsibility of the user to insert space between tokens or to give pretty-printing rules for the possible combinations, e.g.

(** printing ->~ %\ensuremath{\rightarrow\lnot}% *)

Sections

Sections are introduced by 1 to 4 asterisks at the beginning of a line followed by a space and the title of the section. One asterisk is a section, two a subsection, etc.

Example

(** * Well-founded relations

    In this section, we introduce...  *)

Lists.

List items are introduced by a leading dash. coqdoc uses whitespace to determine the depth of a new list item and which text belongs in which list items. A list ends when a line of text starts at or before the level of indenting of the list’s dash. A list item’s dash must always be the first non-space character on its line (so, in particular, a list can not begin on the first line of a comment - start it on the second line instead).

Example

We go by induction on [n]:
- If [n] is 0...
- If [n] is [S n'] we require...

  two paragraphs of reasoning, and two subcases:

  - In the first case...
  - In the second case...

So the theorem holds.

Rules.

More than 4 leading dashes produce a horizontal rule.

Emphasis.

Text can be italicized by enclosing it in underscores. A non-identifier character must precede the leading underscore and follow the trailing underscore, so that uses of underscores in names aren’t mistaken for emphasis. Usually, these are spaces or punctuation.

This sentence contains some _emphasized text_.

Escaping to LaTeX and HTML.

Pure LaTeX or HTML material can be inserted using the following escape sequences:

  • $...LATEX stuff...$ inserts some LaTeX material in math mode. Simply discarded in HTML output.

  • %...LATEX stuff...% inserts some LaTeX material. Simply discarded in HTML output.

  • #...HTML stuff...# inserts some HTML material. Simply discarded in LaTeX output.

Note

to simply output the characters $, % and # and escaping their escaping role, these characters must be doubled.

Verbatim

Verbatim material is introduced by a leading << and closed by >> at the beginning of a line.

Example

Here is the corresponding caml code:
<<
  let rec fact n =
    if n <= 1 then 1 else n * fact (n-1)
>>

Hiding / Showing parts of the source.

Some parts of the source can be hidden using command line options -g and -l (see below), or using such comments:

(* begin hide *)
 *some Coq material*
(* end hide *)

Conversely, some parts of the source which would be hidden can be shown using such comments:

(* begin show *)
 *some Coq material*
(* end show *)

The latter cannot be used around some inner parts of a proof, but can be used around a whole proof.

Usage

coqdoc is invoked on a shell command line as follows: coqdoc <options and files>. Any command line argument which is not an option is considered to be a file (even if it starts with a -). Coq files are identified by the suffixes .v and .g and LaTeX files by the suffix .tex.

HTML output

This is the default output format. One HTML file is created for each Coq file given on the command line, together with a file index.html (unless option-no-index is passed). The HTML pages use a style sheet named style.css. Such a file is distributed with coqdoc.

LaTeX output

A single LaTeX file is created, on standard output. It can be redirected to a file using the option -o. The order of files on the command line is kept in the final document. LaTeX files given on the command line are copied ‘as is’ in the final document . DVI and PostScript can be produced directly with the options -dvi and -ps respectively.

TEXmacs output

To translate the input files to TEXmacs format, to be used by the TEXmacs Coq interface.

Command line options

Overall options

--HTML

Select a HTML output.

--LaTeX

Select a LaTeX output.

--dvi

Select a DVI output.

--ps

Select a PostScript output.

--texmacs

Select a TEXmacs output.

--stdout

Write output to stdout.

-o file, --output file

Redirect the output into the file ‘file’ (meaningless with -html).

-d dir, --directory dir

Output files into directory ‘dir’ instead of the current directory (option -d does not change the filename specified with the option -o, if any).

--body-only

Suppress the header and trailer of the final document. Thus, you can insert the resulting document into a larger one.

-p string, --preamble string

Insert some material in the LaTeX preamble, right before \begin{document} (meaningless with -html).

--vernac-file file,--tex-file file

Considers the file ‘file’ respectively as a .v (or .g) file or a .tex file.

--files-from file

Read filenames to be processed from the file ‘file’ as if they were given on the command line. Useful for program sources split up into several directories.

-q, --quiet

Be quiet. Do not print anything except errors.

-h, --help

Give a short summary of the options and exit.

-v, --version

Print the version and exit.

Index options

The default behavior is to build an index, for the HTML output only, into index.html.

--no-index

Do not output the index.

--multi-index

Generate one page for each category and each letter in the index, together with a top page index.html.

--index string

Make the filename of the index string instead of “index”. Useful since “index.html” is special.

Table of contents option

-toc, --table-of-contents

Insert a table of contents. For a LaTeX output, it inserts a \tableofcontents at the beginning of the document. For a HTML output, it builds a table of contents into toc.html.

--toc-depth int

Only include headers up to depth int in the table of contents.

Hyperlink options

--glob-from file

Make references using Coq globalizations from file file. (Such globalizations are obtained with Coq option -dump-glob).

--no-externals

Do not insert links to the Coq standard library.

--external url coqdir

Use given URL for linking references whose name starts with prefix coqdir.

--coqlib url

Set base URL for the Coq standard library (default is http://coq.inria.fr/library/). This is equivalent to --external url Coq.

-R dir coqdir

Recursively map physical directory dir to Coq logical directory coqdir (similarly to Coq option -R).

-Q dir coqdir

Map physical directory dir to Coq logical directory coqdir (similarly to Coq option -Q).

Note

options -R and -Q only have effect on the files following them on the command line, so you will probably need to put this option first.

Title options

-s , --short

Do not insert titles for the files. The default behavior is to insert a title like “Library Foo” for each file.

--lib-name string

Print “string Foo” instead of “Library Foo” in titles. For example “Chapter” and “Module” are reasonable choices.

--no-lib-name

Print just “Foo” instead of “Library Foo” in titles.

--lib-subtitles

Look for library subtitles. When enabled, the beginning of each file is checked for a comment of the form:

(** * ModuleName : text *)

where ModuleName must be the name of the file. If it is present, the text is used as a subtitle for the module in appropriate places.

-t string, --title string

Set the document title.

Contents options

-g, --gallina

Do not print proofs.

-l, --light

Light mode. Suppress proofs (as with -g) and the following commands:

  • [Recursive] Tactic Definition

  • Hint / Hints

  • Require

  • Transparent / Opaque

  • Implicit Argument / Implicits

  • Section / Variable / Hypothesis / End

The behavior of options -g and -l can be locally overridden using the (* begin show *) … (* end show *) environment (see above).

There are a few options that control the parsing of comments:

--parse-comments

Parse regular comments delimited by (* and *) as well. They are typeset inline.

--plain-comments

Do not interpret comments, simply copy them as plain-text.

--interpolate

Use the globalization information to typeset identifiers appearing in Coq escapings inside comments.

Language options

The default behavior is to assume ASCII 7 bit input files.

-latin1, --latin1

Select ISO-8859-1 input files. It is equivalent to --inputenc latin1 --charset iso-8859-1.

-utf8, --utf8

Set --inputenc utf8x for LaTeX output and--charset utf-8 for HTML output. Also use Unicode replacements for a couple of standard plain ASCII notations such as → for -> and ∀ for forall. LaTeX UTF-8 support can be found at http://www.ctan.org/pkg/unicode. For the interpretation of Unicode characters by LaTeX, extra packages which coqdoc does not provide by default might be required, such as textgreek for some Greek letters or stmaryrd for some mathematical symbols. If a Unicode character is missing an interpretation in the utf8x input encoding, add \DeclareUnicodeCharacter{code}{LATEX-interpretation}. Packages and declarations can be added with option -p.

--inputenc string

Give a LaTeX input encoding, as an option to LaTeX package inputenc.

--charset string

Specify the HTML character set, to be inserted in the HTML header.

The coqdoc LaTeX style file

In case you choose to produce a document without the default LaTeX preamble (by using option --no-preamble), then you must insert into your own preamble the command

\usepackage{coqdoc}

The package optionally takes the argument [color] to typeset identifiers with colors (this requires the xcolor package).

Then you may alter the rendering of the document by redefining some macros:

coqdockw, coqdocid, …

The one-argument macros for typesetting keywords and identifiers. Defaults are sans-serif for keywords and italic for identifiers.For example, if you would like a slanted font for keywords, you may insert

\renewcommand{\coqdockw}[1]{\textsl{#1}}

anywhere between \usepackage{coqdoc} and \begin{document}.

coqdocmodule

One-argument macro for typesetting the title of a .v file. Default is

\newcommand{\coqdocmodule}[1]{\section*{Module #1}}

and you may redefine it using \renewcommand.

Embedded Coq phrases inside LaTeX documents

When writing documentation about a proof development, one may want to insert Coq phrases inside a LaTeX document, possibly together with the corresponding answers of the system. We provide a mechanical way to process such Coq phrases embedded in LaTeX files: the coq-tex filter. This filter extracts Coq phrases embedded in LaTeX files, evaluates them, and insert the outcome of the evaluation after each phrase.

Starting with a file file.tex containing Coq phrases, the coq-tex filter produces a file named file.v.tex with the Coq outcome.

There are options to produce the Coq parts in smaller font, italic, between horizontal rules, etc. See the man page of coq-tex for more details.

Man pages

There are man pages for the commands coqdep and coq-tex. Man pages are installed at installation time (see installation instructions in file INSTALL, step 6).