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*~
\#*
.\#*
.DS_Store
compiled/
/doc/

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language: c
sudo: false
env:
global:
# RACKET_DIR is an argument to install-racket.sh
- RACKET_DIR=~/racket
- PATH="$RACKET_DIR/bin:$PATH"
matrix:
# RACKET_VERSION is an argument to install-racket.sh
- RACKET_VERSION=6.5
- RACKET_VERSION=6.6
- RACKET_VERSION=6.7
- RACKET_VERSION=6.8
- RACKET_VERSION=RELEASE
- RACKET_VERSION=HEAD
before_install:
- curl -L https://raw.githubusercontent.com/greghendershott/travis-racket/master/install-racket.sh | bash
- raco pkg install --deps search-auto doc-coverage cover cover-codecov # or cover-coveralls
install:
- raco pkg install --deps search-auto -j 2
script:
- raco test -x -p "$(basename "$TRAVIS_BUILD_DIR")"
- raco setup --check-pkg-deps --no-zo --no-launcher --no-install --no-post-install --no-docs --pkgs "$(basename "$TRAVIS_BUILD_DIR")"
- raco doc-coverage "$(basename "$TRAVIS_BUILD_DIR")"
- raco cover -s main -s test -s doc -f codecov -f html -d ~/coverage . || true
# TODO: add an option to cover to run the "outer" module too, not just the submodules.
# TODO: deploy the coverage info.

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remember
Parts of this this software were initially written as part of a project
at Cortus, S.A.S. which can be reached at 97 Rue de Freyr, 34000
Montpellier, France. I got their permission to redistribute the code in
the Public Domain.
This package is in distributed under the Creative Commons CC0 license
https://creativecommons.org/publicdomain/zero/1.0/, as specified by
the LICENSE.txt file.
The CC0 license is equivalent to a dedication to the Public Domain
in most countries, but is also effective in countries which do not
recognize explicit dedications to the Public Domain.
In order to avoid any potential licensing issues, this package is explicitly
distributed under the Creative Commons CC0 license
https://creativecommons.org/publicdomain/zero/1.0/, or under the GNU Lesser
General Public License (LGPL) https://opensource.org/licenses/LGPL-3.0, or
under the Apache License Version 2.0
https://opensource.org/licenses/Apache-2.0, or under the MIT license
https://opensource.org/licenses/MIT, at your option.

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[![Build Status,](https://img.shields.io/travis/jsmaniac/remember/master.svg)](https://travis-ci.org/jsmaniac/remember)
[![Coverage Status,](https://img.shields.io/codecov/c/github/jsmaniac//master.svg)](https://codecov.io/gh/jsmaniac/remember)
[![Build Stats,](https://img.shields.io/badge/build-stats-blue.svg)](http://jsmaniac.github.io/travis-stats/#jsmaniac/remember)
[![Online Documentation,](https://img.shields.io/badge/docs-online-blue.svg)](http://docs.racket-lang.org/remember/)
[![Maintained as of 2017,](https://img.shields.io/maintenance/yes/2017.svg)](https://github.com/jsmaniac/remember/issues)
[![License: CC0 v1.0.](https://img.shields.io/badge/license-CC0-blue.svg)](https://creativecommons.org/publicdomain/zero/1.0/)
remember
========
This Racket library provides a compile-time memoize feature. It allows
remembering a value with `(remember-write! 'category 'value)`. In subsequent
compilations, `(get-remembered 'category)` will return a set of all
previously-remembered values.
Installation
============
raco pkg install remember
Example use case: the `phc-adt` library
=======================================
This library is used to implement "interned" structure and constructor types
in the [`phc-adt`](https://github.com/jsmaniac/phc-adt) library. The `phc-adt`
library needs to know the set of all structure and constructor types used in
the program, and uses `remember` to automatically memoize structure
descriptors and constructor names.
When the `structure` macro defined in
[`structure.hl.rkt`](https://github.com/jsmaniac/phc-adt/blob/refactor/structure.hl.rkt)
encounters an unknown list of field names, it uses the `remember` library to
append the tuple of field names to a user-specified file. That file is loaded
in subsequent compilations, so that the tuple of fields is known to `phc-adt`.
The memoized descriptors are used to know all possible structs that can
contain a field with the desired name when accessing it with `(get instance
field-name)`. The `get` macro can then retrieve the field's value using the
right accessor (for example `(struct123-fieldname instance)`). Knowing all
existing structures allows `get` to perform some kind of dynamic dispatch to
obtain the appropriate accessor, for example using a `cond` which tests for
all possible types.
The `constructor` macro defined in
[`constructor.hl.rkt`](https://github.com/jsmaniac/phc-adt/blob/refactor/constructor.hl.rkt)
works in the same way, but remembers the name of the constructor's tag instead
of field names. The memoization feature is used so that all uses of a
constructor with a given name are equivalent, across all files.

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#lang info
(define collection "remember")
(define deps '("base"
"rackunit-lib"
"compatibility-lib"
"scribble-lib"
"typed-racket-lib"
"phc-toolkit"
"hyper-literate"))
(define build-deps '("scribble-lib"
"racket-doc"
"typed-racket-doc"
"scribble-enhanced"))
(define scribblings '(("scribblings/remember.scrbl" ())
("remember-implementation.hl.rkt" () (omit-start))))
(define compile-omit-paths '("test/test-error.rkt"))
(define test-omit-paths '("test/test-error.rkt"))
(define pkg-desc (string-append "Compile-time memoize across compilations."
" Writes values to a file, so that they will"
" be remembered during the next compilation."))
(define version "0.9")
(define pkg-authors '(|Georges Dupéron|))

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Copyright (c) 2000-2015 Dipanwita Sarkar, Andrew W. Keep, R. Kent Dybvig, Oscar Waddell
Permission is hereby granted, free of charge, to any person obtaining a
copy of this software and associated documentation files (the "Software"),
to deal in the Software without restriction, including without limitation
the rights to use, copy, modify, merge, publish, distribute, sublicense,
and/or sell copies of the Software, and to permit persons to whom the
Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

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Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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#lang racket
(require "remember-implementation.hl.rkt")
(provide (all-from-out "remember-implementation.hl.rkt"))

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#lang hyper-literate racket/base
@(require scribble-enhanced/doc)
@doc-lib-setup
@title[#:style manual-doc-style
#:tag "remember"
#:tag-prefix "(lib remember/remember-implementation.hl.rkt)"
]{Implementation of Remember}
@(chunks-toc-prefix
'("(lib remember/remember-implementation.hl.rkt)"))
@(table-of-contents)
@section{@racket[remember]}
This module allows macros to remember some values across
compilations. Values are stored within the
@tc[remembered-values] hash table, which associates a
@racket[_category] (a symbol) with a set of values.
@chunk[<remembered-values>
(begin-for-syntax
(define remembered-values (make-hash)))]
A second set tracks values which were recently written, but
not initially added via @racket[remembered!] or
@racket[remembered-add!].
@chunk[<remembered-values>
(begin-for-syntax
(define written-values (make-hash)))]
The user can specify input files from which remembered
values are loaded, and optionally an output file to which
new, not-yet-remembered values will be appended:
@CHUNK[<remember-file>
(define-for-syntax remember-output-file-parameter
(make-parameter #f (or? path-string? false?)))
(define-syntax (remember-output-file stx)
(syntax-case stx ()
[(_ new-value)
(string? (syntax-e #'new-value))
(begin (remember-output-file-parameter (syntax-e #'new-value))
#'(void))]
[(_)
(quasisyntax/loc stx remember-output-file-parameter)]))
(define-syntax (remember-input-file stx)
(syntax-case stx ()
[(_ name)
(string? (syntax-e #'name))
#'(require (only-in name))]))
(define-syntax-rule (remember-io-file name)
(begin (remember-input-file name)
(remember-output-file name)))]
@CHUNK[<remember>
(define-syntax-rule (remembered! category value)
(begin-for-syntax
(remembered-add! 'category 'value)))
(define-for-syntax writable?
(disjoin number?
string?
symbol?
char?
null?
(λ (v) (and (pair? v)
(writable? (car v))
(writable? (cdr v))))
(λ (v) (and (vector? v)
(andmap writable? (vector->list v))))))
(define-for-syntax (remembered-add! category value)
(unless (writable? value)
(error "Value to remember does not seem to be safely writable:"
value))
(unless (symbol? category)
(error (format "The category was not a symbol, when remembering ~a:"
value)
category))
(hash-update! remembered-values
category
(λ (s) (set-add s value))
set))
(define-for-syntax (remembered-add-written! category value)
(unless (writable? value)
(error "Value to remember does not seem to be safely writable:"
value))
(unless (symbol? category)
(error (format "The category was not a symbol, when remembering ~a:"
value)
category))
(hash-update! written-values
category
(λ (s) (set-add s value))
set))
(define-for-syntax (remembered? category value)
(unless (writable? value)
(error "Value to remember does not seem to be safely writable:"
value))
(set-member? (hash-ref remembered-values category set) value))
(define-for-syntax (written? category value)
(unless (writable? value)
(error "Value to remember does not seem to be safely writable:"
value))
(set-member? (hash-ref written-values category set) value))
(define-for-syntax (remembered-or-written? category value)
(or (remembered? category value)
(written? category value)))
(define-for-syntax (remember-write! category value)
(unless (writable? value)
(error "Value to remember does not seem to be safely writable:"
value))
(unless (or (remembered? category value)
(written? category value))
(when (remember-output-file-parameter)
(with-output-file [port (remember-output-file-parameter)]
#:exists 'append
(writeln (list 'remembered! category value)
port)))
(remembered-add-written! category value)))]
@chunk[<delayed-errors>
(begin-for-syntax
(define remember-errors-list '())
(define remember-lifted-error #f))]
@chunk[<error>
(define-for-syntax (remembered-error! category
stx-value
[stx-errs (list stx-value)])
(set! remember-errors-list
(cons (list category stx-value stx-errs) remember-errors-list))
(unless (disable-remember-immediate-error)
(if (not (syntax-local-lift-context))
;; Trigger the error right now
(remember-all-hard-error)
;; Lift a delayed error, which will be triggered later on
(lift-maybe-delayed-errors))))
(define-for-syntax (remembered-add-error! category stx-value)
(remembered-add! category (syntax-e stx-value))
(remembered-error! category stx-value))]
@CHUNK[<remember-all-hard-error>
;; These two functions allow us to wait around 1000 levels of nested
;; macro-expansion before triggering the error.
;; If the error is triggered immediately when the lifted statements are
;; added at the end of the module, then it can get executed before macros
;; used in the righ-hand side of a (define …) are expanded, for example.
;; Since these macros may need to remember more values, it's better to
;; wait until they are all expanded.
;; The number 1000 above in #`(delay-remember-all-hard-error1 1000) is
;; arbitrary, but should be enough for most practical purposes, worst
;; case the file would require a few more compilations to settle.
(define-syntax (delay-remember-all-hard-error1 stx)
(syntax-case stx ()
[(_ n)
(number? (syntax-e #'n))
(if (> (syntax-e #'n) 0)
#`(let ()
(define blob
(delay-remember-all-hard-error2 #,(- (syntax-e #'n) 1)))
(void))
(begin (syntax-local-lift-module-end-declaration
#`(remember-all-hard-error-macro))
#'(void)))]))
(define-syntax (delay-remember-all-hard-error2 stx)
(syntax-case stx ()
[(_ n)
(number? (syntax-e #'n))
(begin
(syntax-local-lift-module-end-declaration
#'(delay-remember-all-hard-error1 n))
#'n)]))
(define-for-syntax (remember-all-hard-error)
(define remember-errors-list-orig remember-errors-list)
(set! remember-errors-list '())
(unless (empty? remember-errors-list-orig)
(raise-syntax-error
'remember
(format (~a "The values ~a were not remembered."
" Some of them may have been added to the"
" appropriate list automatically."
" Please recompile this file now.")
(string-join (remove-duplicates
(reverse
(stx-map (compose ~a syntax->datum)
(map cadr
remember-errors-list-orig))))
", "))
#f
#f
(remove-duplicates
(append-map caddr remember-errors-list-orig)
#:key (λ (e)
(cons (syntax->datum e)
(build-source-location-list e)))))))
(define-syntax (remember-all-hard-error-macro stx)
(remember-all-hard-error)
#'(void))]
The @racket[disable-remember-immediate-error] parameter allows code to
temporarily prevent @racket[remembered-error!] from lifting a delayed error.
This can be useful for example when calling @racket[remembered-error!] from a
context where @racket[(syntax-local-lift-context)] is @racket[#false], e.g.
outside of the expansion of a macro, but within a @racket[begin-for-syntax]
block.
@chunk[<disable-remember-errors>
(define-for-syntax disable-remember-immediate-error (make-parameter #f))]
The error is still put aside, so that if a delayed error was triggered by
another call to @racket[remembered-error!], the error will still be included
with the other delayed errors. If no delayed error is triggered during
macro-expansion, the error that was put aside will be ignored. To prevent
that, the user can call @racket[lift-maybe-delayed-errors] within a context
where lifts are possible.
@chunk[<lift-maybe-delayed-errors>
(define-for-syntax (lift-maybe-delayed-errors)
(if (syntax-transforming-module-expression?)
;; Lift a delayed error, attempting to allow several (1000) levels
;; of nested let blocks to expand before pulling the alarm signal.
(unless remember-lifted-error
(set! remember-lifted-error #t)
(syntax-local-lift-module-end-declaration
#`(delay-remember-all-hard-error1 1000)))
;; Lift a delayed error, which will be triggered after the current
;; expansion pass (i.e. before the contents of any let form is
;; expanded).
(syntax-local-lift-expression
#`(remember-all-hard-error-macro))))]
@CHUNK[<get-remembered>
(define-for-syntax (get-remembered category)
(hash-ref remembered-values category set))]
@chunk[<provide>
(begin-for-syntax
(provide get-remembered
remembered-add!
remembered?
remembered-or-written?
remember-write!
remembered-error!
remember-output-file-parameter
disable-remember-immediate-error
lift-maybe-delayed-errors))
(provide remember-input-file
remember-output-file
remember-io-file
remembered!)
(module+ private
(begin-for-syntax
(provide remembered-add-written!)))]
@; TODO: circumvents bug https://github.com/racket/scribble/issues/44
@(require racket/require)
@chunk[<*>
(require mzlib/etc
;; TODO: circumvent https://github.com/racket/scribble/issues/44
racket/require
(subtract-in phc-toolkit/untyped syntax/stx)
syntax/stx
(for-syntax racket/base
racket/function
racket/bool
racket/set
racket/list
mzlib/etc
;;TODO: https://github.com/racket/scribble/issues/44
(subtract-in phc-toolkit/untyped
syntax/stx)
syntax/stx
syntax/srcloc
racket/string
racket/format))
<provide>
<remembered-values>
<remember-file>
<remember>
<get-remembered>
<delayed-errors>
<disable-remember-errors>
<lift-maybe-delayed-errors>
<remember-all-hard-error>
<error>]

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#lang scribble/manual
@require[@for-label[remember
racket/base]]
@title{Remember: storage for macros which is persistant across compilations}
@author{Georges Dupéron}
@defmodule[remember]
This library is implemented using literate programming. The
implementation details are presented in
@other-doc['(lib "remember/remember-implementation.hl.rkt")].
This module allows macros to remember some values across
compilations. Values are grouped by @racket[_category], so
that multiple macros can use this facility without
interfering with each other. The @racket[_category] is
simply a symbol given when remembering the value.
The list of all remembered values for a given
@racket[_category] is returned by @racket[get-remembered],
and it is possible to check if a single value has been
remembered using @racket[remembered?].
Values are loaded from files using
@racket[remember-input-file] and @racket[remember-io-file].
An output file can be set with
@racket[remember-output-file] and
@racket[remember-io-file].
When an output file has been declared, new values passed to
@racket[remember-write!] are marked as
@racket[remembered-or-written?] and appended to that file
(more precisely, the expression
@racket[(remembered! _category _value)] is appended to the
file, followed by a newline).
When initially created by the user, the output file should
contain the code below, which will be followed by the
automatically-generated
@racket[(remembered! _category _value)] statements:
@codeblock[#:keep-lang-line? #t]|{
#lang racket
(require remember)}|
The @racket[remembered!] macro indicates an
already-remembered value, and is typically used inside input
files. The @racket[for-syntax] function
@racket[remembered-add!] can also be used instead, to mark a
value as @racket[remembered?] without adding it to any file
(this can be useful for values which should implicitly be
remembered).
@defproc[#:kind "for-syntax procedure"
(get-remembered [category symbol?]) list?]{
Returns a list of all values that have been remembered for
the given @racket[category] (i.e. all values passed as the
second argument to @racket[remembered-add!],
@racket[remember-write!] or @racket[remembered!], with the given
category as the first argument).}
@defproc[#:kind "for-syntax procedure"
(remembered-add! [category symbol?] [value any/c]) void?]{
Marks the given @racket[value] as remembered in the given
@racket[category]. If the same value is remembered twice
for the same category, the second occurrence is ignored
(i.e. values are stored in a distinct @racket[set] for each
category).
This @racket[for-syntax] procedure is called by the
@racket[remembered!] macro, but can also be executed on its
own.}
@defproc[#:kind "for-syntax procedure"
(remembered? [category symbol?] [value any/c]) boolean?]{
Checks whether the given @racket[value] has already been
added to the set of remembered values for the given
@racket[category].}
@defproc[#:kind "for-syntax procedure"
(remembered-or-written? [category symbol?] [value any/c]) boolean?]{
Checks whether the given @racket[value] has already been
added to the set of remembered values for the given
@racket[category], or if it was freshly written to a file
during the current expansion.}
@defproc[#:kind "for-syntax procedure"
(remember-write! [category symbol?] [value any/c]) void?]{
Adds the given @racket[value] to the current
@racket[remember-output-file] for the given category. More
precisely, the expression
@racket[(remembered! category value)] is appended to the
file, followed by a newline.
If the value is already @racket[remembered-or-written?],
then the file is left unchanged, i.e. two or more calls to
@racket[remember-write!] with the same @racket[category]
and @racket[value] will only append an expression to the
file the first time.
The value is also added to the set of
@racket[remembered-or-written?] values, so that subsequent
calls to @racket[remembered-or-written?] return
@racket[#t] for that category and value. Calls to
@racket[remembered?] will be unaffected, and will still
return @racket[#f]. If some declarations are created by a
library based on the @racket[get-remembered] set, it is
therefore possible to check whether a value was already
present, or if it was added by a subsequent
@racket[remember-write!].}
@defproc[#:kind "for-syntax procedure"
(remembered-error! [category symbol] [stx-value syntax?]) void?]{
Produces a delayed error indicating that this value has
not been remembered, but was added to the output file.
This procedure just triggers the error, and is not
concerned with actually adding the value to the output
file.
The error is added in a lifted declaration which is
inserted at the end of the current module, using
@racket[syntax-local-lift-module-end-declaration]. It
should therefore be triggered only when the compilation
reaches the end of the file, if no other error was raised
before.
This allows as many @racket[remembered-error!] errors as
possible to be accumulated; all of these are then shown
when the file is fully expanded. The goal is to be able to
add all values to the output file in a single run, instead
of aborting after each value which is not remembered. This
would otherwise require recompiling the program once for
each value which is not initially remembered.
TODO: it would be nice to factor out the delayed error
mechanism into a separate package, so that multiple
libraries can add errors, and all of them get reported,
without one preventing the others from executing. This
function would likely keep the same signature, and just
delegate to the delayed-error library.}
@defparam[disable-remember-immediate-error disable? boolean? #:value #f]{
The @racket[disable-remember-immediate-error] parameter allows code to
temporarily prevent @racket[remembered-error!] from lifting a delayed error.
This can be useful for example when calling @racket[remembered-error!] from a
context where @racket[(syntax-local-lift-context)] is @racket[#false], e.g.
outside of the expansion of a macro, but within a @racket[begin-for-syntax]
block.
The error is still put aside, so that if a delayed error was triggered by
another call to @racket[remembered-error!], the error will still be included
with the other delayed errors. If no delayed error is triggered during
macro-expansion, the error that was put aside will be ignored. To prevent
this from happening, call @racket[lift-maybe-delayed-errors] within a context
where lifts are possible.}
@defproc[(lift-maybe-delayed-errors) void?]{
Uses @racket[syntax-local-lift-module-end-declaration] or
@racket[syntax-local-lift-expression], depending on the context, to lift an
expression which will trigger delayed errors, if any. If no delayed errors
have been recorded by @racket[remembered-error!] when the lifted form is
executed, then nothing will happen and expansion will proceed.
Note that when @racket[(syntax-transforming-module-expression?)] returns
@racket[#false], @racket[syntax-local-lift-expression] is used. The lifted
form is then run as part of the current expansion pass, before the contents of
any @racket[let] forms are expanded. This means that calls to
@racket[remembered-error!] must not happen within the expansion of nested
@racket[let] forms (with respect to the @racket[let] form being expanded (if
any) when @racket[lift-maybe-delayed-errors] is called), as they would add
delayed errors too late, i.e. after the lifted form got executed.}
@defform[(remember-input-file name)
#:grammar ([name string?])]{
The file is loaded with @racket[require], but no
identifier is imported from that module. Instead,
@racket[remembered?] relies on its internal mutable
@racket[for-syntax] hash table which stores remembered
values associated to their category.
@racket[remembered-values]. Values are added to the hash
via the @racket[remembered!] macro. The @racket[name] file
should therefore @racket[require] the
@racketmodname[remember] library, and contain a number of
calls to @racket[remembered!], each adding a new value to
the mutable hash.}
@deftogether[
(@defform*[((remember-output-file)
(remember-output-file name))
#:grammar ([name (or/c string? false?)])]
@defproc*[#:kind "for-syntax parameter"
#:link-target? #f
([(remember-output-file) (or/c string? false?)]
[(remember-output-file [name (or/c string? false?)]) void?])]
)]{
Indicates that new values added via
@racket[remember-write!] should be appended to the file
@racket[name]. More precisely, the expression
@racket[(remembered! _category _value)] is appended to the
file, followed by a newline.
Note that if the @racket[_value] given to
@racket[remember-write!] is already registered in an input
file with @racket[remembered!] for the same category, it
will not be appended to the output file.
For now there can only be one @racket[output] file at the
same time, any call to @racket[remember-output-file]
overrides the setting from previous calls. Future versions
of this library may offer the possibility to specify an
output file per @racket[_category].
The special value @racket[#f] indicates that there is no
output file, in which case @racket[remember-write!] simply
marks the @racket[value] as
@racket[remembered-or-written?] for that category, without
altering any file.
This identifier exists both as a macro and a for-syntax
parameter. When called without any argument, it expands to
(for the macro) or returns (for the for-syntax parameter)
the last value set using either the macro or by passing an
argument to the for-syntax parameter.}
@defparam[remember-output-file-parameter output-file
(or/c path-string? false?)
#:value #f]{
This for-syntax parameter that new values added via @racket[remember-write!]
should be appended to the file whose name is stored within the parameter.
The @racket[remember-output-file] macro simply sets this parameter.}
@defform[(remember-io-file name)
#:grammar ([name string?])]{
Indicates that calls to @racket[remembered!] in this file
should be taken into account, and that new values added
with @racket[remember-write!] should be appended to this
file.
It is equivalent to:
@racketblock[(remember-input-file name)
(remember-output-file name)]}
@defform[(remembered! category value)
#:grammar ([category identifier?])]{
Marks the given @racket[value] as remembered in the given
@racket[category]. If the same value is remembered twice
for the same category, the second occurrence is ignored
(i.e. values are stored in a distinct @racket[set] for each
category).
Calls to this macro are usually present in an input file
loaded with @racket[remember-input-file] or
@racket[remember-io-file], but can also be inserted in the
main file or any other file loaded with @racket[require].}

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#lang racket
(require remember)
(remembered! foo-error (1 2 3))
(remembered! foo-error (1 2 3 4))
(remembered! foo-error (1 2 3 5))
(define + 'wrong)
(provide +)

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#lang racket
(require remember)
(remembered! foo (1 2 3))
(remembered! foo (1 2 3 4))
(remembered! foo (1 2 3 5))

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#lang racket
(require remember)
(remembered! foo3 (1 2 3))
(remembered! foo3 (1 2 3 4))
(remembered! foo3 (1 2 3 5))
(define + 'wrong)
(provide +)

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#lang racket
(require remember)
(remembered! bar (1 2 3 xyz))

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#lang racket
(require remember
rackunit)
(remember-input-file "input-error.rkt")
(define-syntax (test-rem stx)
(syntax-case stx ()
[(_ val)
(let ([v (syntax-e #'val)])
(unless (remembered? 'err-category v)
(remembered-error! 'err-category #'val)))
#'(void)]))
(test-rem one)
(test-rem two)
(check-equal? (+ 1 2) 3)
(test-rem three)
(test-rem four)

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#lang racket
(require remember
rackunit
(submod "../remember-implementation.hl.rkt" private))
(remember-input-file "input1.rkt")
(begin-for-syntax
(require rackunit)
(define secs (current-seconds))
(remembered-add-written! 'foo `(1 2 3 secs))
(check-false (remembered? 'foo `(1 2 3 secs)))
(check-true (remembered-or-written? 'foo `(1 2 3 secs))))
;; check that no identifiers were imported from "input1.rkt".
(check-not-equal? + 'wrong)

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#lang racket
(require remember)
(remember-io-file "io2.rkt")
(begin-for-syntax
(require rackunit)
;; Manually check for an error the first time this
;; file is compiled after emptying io2.rkt
(check-true (remembered? 'bar '(1 2 3 xyz)))
(remember-write! 'bar '(1 2 3 xyz)))

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#lang racket
(require remember)
(remember-io-file "input3.rkt")
(begin-for-syntax
(require rackunit
racket/set)
(check set=? (get-remembered 'foo3)
(set '(1 2 3) '(1 2 3 5) '(1 2 3 4))))