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| Author | SHA1 | Date |
|---|---|---|
 Matthew Butterick
|
57ba4a6f07 | 6 years ago |
@ -1,57 +0,0 @@
|
||||
name: CI
|
||||
|
||||
on: [push, pull_request]
|
||||
|
||||
jobs:
|
||||
run:
|
||||
name: "Build using Racket '${{ matrix.racket-version }}' (${{ matrix.racket-variant }})"
|
||||
runs-on: ubuntu-latest
|
||||
strategy:
|
||||
fail-fast: false
|
||||
matrix:
|
||||
racket-version: ["6.6", "6.7", "6.8", "6.9", "6.10.1", "6.11", "6.12", "7.0", "7.1", "7.2", "7.3", "7.4", "7.5", "7.6", "7.7", "7.8", "7.9", "8.0", "8.1", "8.2", "8.3", "current"]
|
||||
racket-variant: ["BC", "CS"]
|
||||
# CS builds are only provided for versions 7.4 and up so avoid
|
||||
# running the job for prior versions.
|
||||
exclude:
|
||||
- {racket-version: "6.6", racket-variant: "CS"}
|
||||
- {racket-version: "6.7", racket-variant: "CS"}
|
||||
- {racket-version: "6.8", racket-variant: "CS"}
|
||||
- {racket-version: "6.9", racket-variant: "CS"}
|
||||
- {racket-version: "6.10.1", racket-variant: "CS"}
|
||||
- {racket-version: "6.11", racket-variant: "CS"}
|
||||
- {racket-version: "6.12", racket-variant: "CS"}
|
||||
- {racket-version: "7.0", racket-variant: "CS"}
|
||||
- {racket-version: "7.1", racket-variant: "CS"}
|
||||
- {racket-version: "7.2", racket-variant: "CS"}
|
||||
- {racket-version: "7.3", racket-variant: "CS"}
|
||||
|
||||
steps:
|
||||
- name: Checkout
|
||||
uses: actions/checkout@master
|
||||
|
||||
- uses: Bogdanp/setup-racket@v0.11
|
||||
with:
|
||||
distribution: 'full'
|
||||
version: ${{ matrix.racket-version }}
|
||||
variant: ${{ matrix.racket-variant }}
|
||||
|
||||
- name: Install BR parser tools
|
||||
run: raco pkg install --deps search-auto https://github.com/mbutterick/br-parser-tools.git?path=br-parser-tools-lib
|
||||
|
||||
- name: Run the br-parser-tools tests
|
||||
run: xvfb-run raco test -p br-parser-tools-lib
|
||||
|
||||
- name: Install brag-lib
|
||||
run: raco pkg install --deps search-auto https://github.com/mbutterick/brag.git?path=brag-lib
|
||||
|
||||
- name: Run the brag-lib tests
|
||||
run: xvfb-run raco test -p brag-lib
|
||||
|
||||
- name: Install brag
|
||||
run: raco pkg install --deps search-auto https://github.com/mbutterick/brag.git?path=brag
|
||||
|
||||
- name: Run the brag tests
|
||||
run: xvfb-run raco test -p brag
|
||||
|
||||
|
||||
@ -0,0 +1,50 @@
|
||||
# adapted from
|
||||
# https://github.com/greghendershott/travis-racket/blob/master/.travis.yml
|
||||
# Thanks Greg!
|
||||
|
||||
language: c
|
||||
sudo: false
|
||||
|
||||
env:
|
||||
global:
|
||||
- RACKET_DIR=~/racket
|
||||
matrix:
|
||||
# - RACKET_VERSION=6.0
|
||||
# - RACKET_VERSION=6.1
|
||||
# - RACKET_VERSION=6.2
|
||||
- RACKET_VERSION=6.3
|
||||
- RACKET_VERSION=6.4
|
||||
- RACKET_VERSION=6.5
|
||||
- RACKET_VERSION=6.6
|
||||
- RACKET_VERSION=6.7
|
||||
- RACKET_VERSION=6.8
|
||||
- RACKET_VERSION=6.9
|
||||
- RACKET_VERSION=6.10
|
||||
- RACKET_VERSION=6.11
|
||||
- RACKET_VERSION=6.12
|
||||
- RACKET_VERSION=HEAD
|
||||
|
||||
# You may want to test against certain versions of Racket, without
|
||||
# having them count against the overall success/failure.
|
||||
matrix:
|
||||
allow_failures:
|
||||
#- env: RACKET_VERSION=HEAD
|
||||
# Fast finish: Overall build result is determined as soon as any of
|
||||
# its rows have failed, or, all of its rows that aren't allowed to
|
||||
# fail have succeeded.
|
||||
fast_finish: true
|
||||
|
||||
before_install:
|
||||
- "export DISPLAY=:99.0" # needed for testing with `racket/gui`
|
||||
- "sh -e /etc/init.d/xvfb start" # needed for testing with `racket/gui`
|
||||
- git clone https://github.com/mbutterick/travis-racket.git
|
||||
- cat travis-racket/install-racket.sh | bash # pipe to bash not sh!
|
||||
- export PATH="${RACKET_DIR}/bin:${PATH}" #install-racket.sh can't set for us
|
||||
|
||||
script:
|
||||
- cd .. # Travis did a cd into the dir. Back up, for the next:
|
||||
# don't rely on package server
|
||||
- travis_retry raco pkg install --deps search-auto https://github.com/mbutterick/br-parser-tools.git?path=br-parser-tools-lib
|
||||
- raco test -p br-parser-tools-lib
|
||||
- travis_retry raco pkg install --deps search-auto https://github.com/mbutterick/brag.git?path=brag
|
||||
- raco test -p brag
|
||||
@ -0,0 +1,165 @@
|
||||
GNU LESSER GENERAL PUBLIC LICENSE
|
||||
Version 3, 29 June 2007
|
||||
|
||||
Copyright (C) 2007 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.
|
||||
|
||||
|
||||
This version of the GNU Lesser General Public License incorporates
|
||||
the terms and conditions of version 3 of the GNU General Public
|
||||
License, supplemented by the additional permissions listed below.
|
||||
|
||||
0. Additional Definitions.
|
||||
|
||||
As used herein, "this License" refers to version 3 of the GNU Lesser
|
||||
General Public License, and the "GNU GPL" refers to version 3 of the GNU
|
||||
General Public License.
|
||||
|
||||
"The Library" refers to a covered work governed by this License,
|
||||
other than an Application or a Combined Work as defined below.
|
||||
|
||||
An "Application" is any work that makes use of an interface provided
|
||||
by the Library, but which is not otherwise based on the Library.
|
||||
Defining a subclass of a class defined by the Library is deemed a mode
|
||||
of using an interface provided by the Library.
|
||||
|
||||
A "Combined Work" is a work produced by combining or linking an
|
||||
Application with the Library. The particular version of the Library
|
||||
with which the Combined Work was made is also called the "Linked
|
||||
Version".
|
||||
|
||||
The "Minimal Corresponding Source" for a Combined Work means the
|
||||
Corresponding Source for the Combined Work, excluding any source code
|
||||
for portions of the Combined Work that, considered in isolation, are
|
||||
based on the Application, and not on the Linked Version.
|
||||
|
||||
The "Corresponding Application Code" for a Combined Work means the
|
||||
object code and/or source code for the Application, including any data
|
||||
and utility programs needed for reproducing the Combined Work from the
|
||||
Application, but excluding the System Libraries of the Combined Work.
|
||||
|
||||
1. Exception to Section 3 of the GNU GPL.
|
||||
|
||||
You may convey a covered work under sections 3 and 4 of this License
|
||||
without being bound by section 3 of the GNU GPL.
|
||||
|
||||
2. Conveying Modified Versions.
|
||||
|
||||
If you modify a copy of the Library, and, in your modifications, a
|
||||
facility refers to a function or data to be supplied by an Application
|
||||
that uses the facility (other than as an argument passed when the
|
||||
facility is invoked), then you may convey a copy of the modified
|
||||
version:
|
||||
|
||||
a) under this License, provided that you make a good faith effort to
|
||||
ensure that, in the event an Application does not supply the
|
||||
function or data, the facility still operates, and performs
|
||||
whatever part of its purpose remains meaningful, or
|
||||
|
||||
b) under the GNU GPL, with none of the additional permissions of
|
||||
this License applicable to that copy.
|
||||
|
||||
3. Object Code Incorporating Material from Library Header Files.
|
||||
|
||||
The object code form of an Application may incorporate material from
|
||||
a header file that is part of the Library. You may convey such object
|
||||
code under terms of your choice, provided that, if the incorporated
|
||||
material is not limited to numerical parameters, data structure
|
||||
layouts and accessors, or small macros, inline functions and templates
|
||||
(ten or fewer lines in length), you do both of the following:
|
||||
|
||||
a) Give prominent notice with each copy of the object code that the
|
||||
Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the object code with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
4. Combined Works.
|
||||
|
||||
You may convey a Combined Work under terms of your choice that,
|
||||
taken together, effectively do not restrict modification of the
|
||||
portions of the Library contained in the Combined Work and reverse
|
||||
engineering for debugging such modifications, if you also do each of
|
||||
the following:
|
||||
|
||||
a) Give prominent notice with each copy of the Combined Work that
|
||||
the Library is used in it and that the Library and its use are
|
||||
covered by this License.
|
||||
|
||||
b) Accompany the Combined Work with a copy of the GNU GPL and this license
|
||||
document.
|
||||
|
||||
c) For a Combined Work that displays copyright notices during
|
||||
execution, include the copyright notice for the Library among
|
||||
these notices, as well as a reference directing the user to the
|
||||
copies of the GNU GPL and this license document.
|
||||
|
||||
d) Do one of the following:
|
||||
|
||||
0) Convey the Minimal Corresponding Source under the terms of this
|
||||
License, and the Corresponding Application Code in a form
|
||||
suitable for, and under terms that permit, the user to
|
||||
recombine or relink the Application with a modified version of
|
||||
the Linked Version to produce a modified Combined Work, in the
|
||||
manner specified by section 6 of the GNU GPL for conveying
|
||||
Corresponding Source.
|
||||
|
||||
1) Use a suitable shared library mechanism for linking with the
|
||||
Library. A suitable mechanism is one that (a) uses at run time
|
||||
a copy of the Library already present on the user's computer
|
||||
system, and (b) will operate properly with a modified version
|
||||
of the Library that is interface-compatible with the Linked
|
||||
Version.
|
||||
|
||||
e) Provide Installation Information, but only if you would otherwise
|
||||
be required to provide such information under section 6 of the
|
||||
GNU GPL, and only to the extent that such information is
|
||||
necessary to install and execute a modified version of the
|
||||
Combined Work produced by recombining or relinking the
|
||||
Application with a modified version of the Linked Version. (If
|
||||
you use option 4d0, the Installation Information must accompany
|
||||
the Minimal Corresponding Source and Corresponding Application
|
||||
Code. If you use option 4d1, you must provide the Installation
|
||||
Information in the manner specified by section 6 of the GNU GPL
|
||||
for conveying Corresponding Source.)
|
||||
|
||||
5. Combined Libraries.
|
||||
|
||||
You may place library facilities that are a work based on the
|
||||
Library side by side in a single library together with other library
|
||||
facilities that are not Applications and are not covered by this
|
||||
License, and convey such a combined library under terms of your
|
||||
choice, if you do both of the following:
|
||||
|
||||
a) Accompany the combined library with a copy of the same work based
|
||||
on the Library, uncombined with any other library facilities,
|
||||
conveyed under the terms of this License.
|
||||
|
||||
b) Give prominent notice with the combined library that part of it
|
||||
is a work based on the Library, and explaining where to find the
|
||||
accompanying uncombined form of the same work.
|
||||
|
||||
6. Revised Versions of the GNU Lesser General Public License.
|
||||
|
||||
The Free Software Foundation may publish revised and/or new versions
|
||||
of the GNU Lesser General Public 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.
|
||||
|
||||
Each version is given a distinguishing version number. If the
|
||||
Library as you received it specifies that a certain numbered version
|
||||
of the GNU Lesser General Public License "or any later version"
|
||||
applies to it, you have the option of following the terms and
|
||||
conditions either of that published version or of any later version
|
||||
published by the Free Software Foundation. If the Library as you
|
||||
received it does not specify a version number of the GNU Lesser
|
||||
General Public License, you may choose any version of the GNU Lesser
|
||||
General Public License ever published by the Free Software Foundation.
|
||||
|
||||
If the Library as you received it specifies that a proxy can decide
|
||||
whether future versions of the GNU Lesser General Public License shall
|
||||
apply, that proxy's public statement of acceptance of any version is
|
||||
permanent authorization for you to choose that version for the
|
||||
Library.
|
||||
@ -1,9 +0,0 @@
|
||||
MIT License for `brag` (code only)
|
||||
|
||||
© 2017-2020 Matthew Butterick
|
||||
|
||||
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.
|
||||
@ -1,24 +1,19 @@
|
||||
|
||||
## brag 
|
||||
brag [](https://travis-ci.org/mbutterick/brag)
|
||||
=
|
||||
|
||||
Racket DSL for generating parsers from BNF grammars.
|
||||
|
||||
|
||||
## Install
|
||||
Licensed under the LGPL. See `LICENSE`.
|
||||
|
||||
`raco pkg install brag`
|
||||
|
||||
|
||||
## Documentation
|
||||
|
||||
http://docs.racket-lang.org/brag/
|
||||
|
||||
Install
|
||||
-
|
||||
|
||||
## License
|
||||
|
||||
MIT. See `LICENSE.md`
|
||||
|
||||
`raco pkg install brag`
|
||||
|
||||
## Project status
|
||||
|
||||
Complete. I will maintain the code but no major updates are planned.
|
||||
Documentation
|
||||
-
|
||||
http://docs.racket-lang.org/brag/
|
||||
|
||||
@ -1,12 +0,0 @@
|
||||
`brag` contains substantial portions of the software [`ragg`](https://github.com/jbclements/ragg)
|
||||
|
||||
MIT License for `ragg`
|
||||
|
||||
© 2012-2013 Danny Yoo
|
||||
|
||||
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.
|
||||
|
||||
@ -1,6 +0,0 @@
|
||||
#lang brag
|
||||
start: A c def hello-world
|
||||
A : "\"\101\\" ; A
|
||||
c : '\'\U0063\\' ; c
|
||||
def : "*\u64\\\"\\\x65f\"" ; de
|
||||
hello-world : "\150\145\154\154\157\40\167\157\162\154\144"
|
||||
@ -1,3 +0,0 @@
|
||||
#lang brag
|
||||
|
||||
start : ( (X | X Y) A* )*
|
||||
@ -1,4 +0,0 @@
|
||||
#lang brag
|
||||
|
||||
start: next
|
||||
next: "0"
|
||||
@ -1,3 +0,0 @@
|
||||
#lang brag
|
||||
/top : sub
|
||||
sub : "x"
|
||||
@ -1,3 +0,0 @@
|
||||
#lang brag
|
||||
/top : sub
|
||||
/sub : "x"
|
||||
@ -1,3 +0,0 @@
|
||||
#lang brag
|
||||
/top : sub
|
||||
@sub : "x"
|
||||
@ -1,4 +0,0 @@
|
||||
#lang info
|
||||
|
||||
(define test-omit-paths '("examples/simple-line-drawing/examples/letter-i.rkt"))
|
||||
(define compile-omit-paths '("test" "examples"))
|
||||
@ -1,39 +0,0 @@
|
||||
#lang racket/base
|
||||
|
||||
(require brag/support)
|
||||
|
||||
(provide current-source
|
||||
current-parser-error-handler
|
||||
current-tokenizer-error-handler)
|
||||
|
||||
;; During parsing, we should define the source of the input.
|
||||
(define current-source (make-parameter 'unknown))
|
||||
|
||||
|
||||
;; When an parse error happens, we call the current-parser-error-handler:
|
||||
(define current-parser-error-handler
|
||||
(make-parameter
|
||||
(lambda (tok-name tok-value offset line col span)
|
||||
(raise (exn:fail:parsing
|
||||
(format "Encountered parsing error near ~e (token ~e) while parsing ~e [line=~a, column=~a, offset=~a]"
|
||||
tok-value tok-name
|
||||
(current-source)
|
||||
line col offset)
|
||||
(current-continuation-marks)
|
||||
(list (srcloc (current-source) line col offset span)))))))
|
||||
|
||||
;; When a tokenization error happens, we call the current-tokenizer-error-handler.
|
||||
(define current-tokenizer-error-handler
|
||||
(make-parameter
|
||||
(lambda (tok-type tok-value offset line column span)
|
||||
(raise (exn:fail:parsing
|
||||
(string-append
|
||||
(format "Encountered unexpected token of type ~e (value ~e) while parsing"
|
||||
(if (memq tok-type (map string->symbol '("\n" "\t" "\r")))
|
||||
(format "~a" tok-type)
|
||||
tok-type) tok-value)
|
||||
(if (or (current-source) line column offset)
|
||||
(format " ~e [line=~a, column=~a, offset=~a]" (current-source) line column offset)
|
||||
""))
|
||||
(current-continuation-marks)
|
||||
(list (srcloc (current-source) line column offset span)))))))
|
||||
@ -1,177 +0,0 @@
|
||||
#lang racket/base
|
||||
(require (for-syntax racket/base "parser.rkt"))
|
||||
(require br-parser-tools/lex
|
||||
(prefix-in : br-parser-tools/lex-sre)
|
||||
"parser.rkt"
|
||||
"rule-structs.rkt"
|
||||
(only-in brag/support from/to)
|
||||
racket/string
|
||||
syntax-color/racket-lexer
|
||||
racket/match)
|
||||
|
||||
(provide lex/1 tokenize)
|
||||
(module+ lex-abbrevs
|
||||
(provide hide-char splice-char id-char letter digit NL id))
|
||||
|
||||
;; A newline can be any one of the following.
|
||||
(define-lex-abbrev NL (:or "\r\n" "\r" "\n"))
|
||||
|
||||
;; reserved-chars = chars used for quantifiers & parse-tree filtering
|
||||
(define-for-syntax quantifiers "+:*?{}") ; colon is reserved to separate rules and productions
|
||||
(define-lex-trans reserved-chars
|
||||
(λ(stx) #`(char-set #,(format "~a~a~a" quantifiers hide-char splice-char))))
|
||||
|
||||
(define-lex-trans hide-char-trans (λ(stx) #`(char-set #,(format "~a" hide-char))))
|
||||
(define-lex-trans splice-char-trans (λ(stx) #`(char-set #,(format "~a" splice-char))))
|
||||
|
||||
(define-lex-abbrevs
|
||||
[letter (:or (:/ "a" "z") (:/ #\A #\Z))]
|
||||
[digit (:/ #\0 #\9)]
|
||||
[id-char (:or letter digit (:& (char-set "+:*@!-.$%&/=?^_~<>") (char-complement (reserved-chars))))]
|
||||
[hide-char (hide-char-trans)]
|
||||
[splice-char (splice-char-trans)]
|
||||
)
|
||||
|
||||
(define-lex-abbrev id (:& (complement (:+ digit)) (:+ id-char)))
|
||||
(define-lex-abbrev id-separator (:or ":" "::="))
|
||||
|
||||
(define (unescape-double-quoted-lexeme lexeme start-pos end-pos)
|
||||
;; use `read` so brag strings have all the notational semantics of Racket strings
|
||||
(with-handlers ([exn:fail:read?
|
||||
(λ (e) ((current-parser-error-handler)
|
||||
#f
|
||||
'error
|
||||
lexeme
|
||||
(position->pos start-pos)
|
||||
(position->pos end-pos)))])
|
||||
(list->string `(#\" ,@(string->list (read (open-input-string lexeme))) #\"))))
|
||||
|
||||
(define (convert-to-double-quoted lexeme)
|
||||
;; brag supports single-quoted strings, for some reason
|
||||
;; (Racket does not. A single quote denotes a datum)
|
||||
;; let's convert a single-quoted string into standard double-quoted style
|
||||
;; so we can use Racket's `read` function on it.
|
||||
;; and thereby support all the standard Racket string elements:
|
||||
;; https://docs.racket-lang.org/reference/reader.html#%28part._parse-string%29
|
||||
(define outside-quotes-removed (string-trim lexeme "'"))
|
||||
(define single-quotes-unescaped (string-replace outside-quotes-removed "\\'" "'"))
|
||||
(define double-quotes-escaped (string-replace single-quotes-unescaped "\"" "\\\""))
|
||||
(define double-quotes-on-ends (string-append "\"" double-quotes-escaped "\""))
|
||||
double-quotes-on-ends)
|
||||
|
||||
(define-lex-abbrev backslash "\\")
|
||||
(define-lex-abbrev single-quote "'")
|
||||
(define-lex-abbrev escaped-single-quote (:: backslash single-quote))
|
||||
(define-lex-abbrev double-quote "\"")
|
||||
(define-lex-abbrev escaped-double-quote (:: backslash double-quote))
|
||||
(define-lex-abbrev escaped-backslash (:: backslash backslash))
|
||||
|
||||
(define brag-lex
|
||||
(lexer-src-pos
|
||||
;; we delegate lexing of double-quoted strings to the Racket lexer (see below)
|
||||
;; single-quoted string has to be handled manually (see lex/1 for details)
|
||||
[(:: single-quote
|
||||
(intersection
|
||||
(:* (:or escaped-single-quote escaped-backslash (:~ single-quote)))
|
||||
(complement (:: any-string backslash escaped-single-quote any-string)))
|
||||
single-quote)
|
||||
(token-LIT (unescape-double-quoted-lexeme (convert-to-double-quoted lexeme) start-pos end-pos))]
|
||||
[(:or "()" "Ø" "∅")
|
||||
(token-EMPTY lexeme)]
|
||||
["("
|
||||
(token-LPAREN lexeme)]
|
||||
["["
|
||||
(token-LBRACKET lexeme)]
|
||||
[")"
|
||||
(token-RPAREN lexeme)]
|
||||
["]"
|
||||
(token-RBRACKET lexeme)]
|
||||
[hide-char
|
||||
(token-HIDE lexeme)]
|
||||
[splice-char
|
||||
(token-SPLICE lexeme)]
|
||||
["|"
|
||||
(token-PIPE lexeme)]
|
||||
[(:or "+" "*" "?"
|
||||
(:: "{" (:* digit) (:? (:: "," (:* digit))) "}"))
|
||||
(token-REPEAT lexeme)]
|
||||
;; Skip whitespace
|
||||
[whitespace
|
||||
(return-without-pos (lex/1 input-port))]
|
||||
;; skip multiline comments
|
||||
[(from/to "(*" "*)") (return-without-pos (lex/1 input-port))]
|
||||
;; Skip comments up to end of line
|
||||
[(:: (:or "#" ";")
|
||||
(complement (:: (:* any-char) NL (:* any-char)))
|
||||
(:or NL ""))
|
||||
(return-without-pos (lex/1 input-port))]
|
||||
;; skip commas (concatenation is implied)
|
||||
["," (return-without-pos (lex/1 input-port))]
|
||||
[(eof)
|
||||
(token-EOF lexeme)]
|
||||
[(:: id (:* whitespace) id-separator)
|
||||
(token-RULE_HEAD lexeme)]
|
||||
[(:: hide-char id (:* whitespace) id-separator)
|
||||
(token-RULE_HEAD_HIDDEN lexeme)]
|
||||
[(:: splice-char id (:* whitespace) id-separator)
|
||||
(token-RULE_HEAD_SPLICED lexeme)]
|
||||
[id
|
||||
(token-ID lexeme)]
|
||||
|
||||
;; We call the error handler for everything else:
|
||||
[(:: any-char)
|
||||
(let-values ([(rest-of-text end-pos-2)
|
||||
(lex-nonwhitespace input-port)])
|
||||
((current-parser-error-handler)
|
||||
#f
|
||||
'error
|
||||
(string-append lexeme rest-of-text)
|
||||
(position->pos start-pos)
|
||||
(position->pos end-pos-2)))]))
|
||||
|
||||
(define (lex/1-with-racket-lexer ip [conversion-proc values])
|
||||
;; delegate lexing of strings to the default Racket lexer
|
||||
(define-values (line-start col-start pos-start) (port-next-location ip))
|
||||
(define str (read ip))
|
||||
(define-values (line-end col-end pos-end) (port-next-location ip))
|
||||
(make-position-token (token-LIT (string-append "\"" str "\""))
|
||||
(make-position pos-start line-start col-start)
|
||||
(make-position pos-end line-end col-end)))
|
||||
|
||||
(define (lex/1 ip)
|
||||
(match (peek-bytes 1 0 ip)
|
||||
[#"\"" (lex/1-with-racket-lexer ip)]
|
||||
;; it would be nice to also handle single-quoted strings with the Racket lexer
|
||||
;; but we can only change the opening delimiter with the readtable.
|
||||
;; for whatever reason, the closing delimiter still has to be a double quote.
|
||||
;; "mapping a character to the same action as a " means that the character starts a string, but the string is still terminated with a closing ". "
|
||||
;; https://docs.racket-lang.org/reference/readtables.html#%28def._%28%28quote._~23~25kernel%29._make-readtable%29%29
|
||||
#;[#"'" (parameterize ([current-readtable (make-readtable (current-readtable)
|
||||
#\' #\" #f)])
|
||||
'lex-single-quoted-string
|
||||
(lex/1-with-racket-lexer ip convert-to-double-quoted))]
|
||||
[_ (brag-lex ip)]))
|
||||
|
||||
;; This is the helper for the error production.
|
||||
(define lex-nonwhitespace
|
||||
(lexer
|
||||
[(:+ (char-complement whitespace))
|
||||
(values lexeme end-pos)]
|
||||
[any-char
|
||||
(values lexeme end-pos)]
|
||||
[(eof)
|
||||
(values "" end-pos)]))
|
||||
|
||||
;; position->pos: position -> pos
|
||||
;; Converts position structures from br-parser-tools/lex to our own pos structures.
|
||||
(define (position->pos a-pos)
|
||||
(pos (position-offset a-pos)
|
||||
(position-line a-pos)
|
||||
(position-col a-pos)))
|
||||
|
||||
|
||||
|
||||
;; tokenize: input-port -> (-> token)
|
||||
(define (tokenize ip #:source [source (object-name ip)])
|
||||
(λ () (parameterize ([file-path source])
|
||||
(lex/1 ip))))
|
||||
@ -1,10 +0,0 @@
|
||||
#lang racket/base
|
||||
|
||||
(require brag/examples/codepoints
|
||||
rackunit)
|
||||
|
||||
(check-equal? (parse-to-datum '("\"A\\" "'c\\" "*d\\\"\\ef\"" "hello world"))
|
||||
'(start (A "\"A\\")
|
||||
(c "'c\\")
|
||||
(def "*d\\\"\\ef\"")
|
||||
(hello-world "hello world")))
|
||||
@ -1,17 +0,0 @@
|
||||
#lang racket/base
|
||||
(require rackunit
|
||||
brag/support
|
||||
brag/examples/subrule)
|
||||
|
||||
(define parse-next (make-rule-parser next))
|
||||
(define parse-start (make-rule-parser start))
|
||||
|
||||
(check-equal? (syntax->datum (parse #f "0")) '(start (next "0")))
|
||||
(check-equal? (syntax->datum (parse #f "0")) (syntax->datum (parse "0")))
|
||||
|
||||
(check-equal? (syntax->datum (parse-start #f "0")) '(start (next "0")))
|
||||
(check-equal? (syntax->datum (parse-start #f "0")) (syntax->datum (parse-start "0")))
|
||||
|
||||
(check-equal? (syntax->datum (parse-next #f "0")) '(next "0"))
|
||||
(check-equal? (syntax->datum (parse-next #f "0")) (syntax->datum (parse-next "0")))
|
||||
|
||||
@ -1,9 +0,0 @@
|
||||
#lang racket/base
|
||||
(require brag/examples/nested-repeats
|
||||
rackunit)
|
||||
|
||||
(check-equal?
|
||||
(syntax->datum (parse (list "X" "Y" "X")))
|
||||
'(start "X" "Y" "X"))
|
||||
|
||||
|
||||
@ -1,11 +0,0 @@
|
||||
#lang racket/base
|
||||
(require (prefix-in 1: brag/examples/top-level-cut-1)
|
||||
(prefix-in 2: brag/examples/top-level-cut-2)
|
||||
(prefix-in 3: brag/examples/top-level-cut-3)
|
||||
brag/support
|
||||
rackunit)
|
||||
|
||||
(check-equal? (1:parse-to-datum "x") '((sub "x")))
|
||||
(check-equal? (2:parse-to-datum "x") '(("x")))
|
||||
(check-equal? (3:parse-to-datum "x") '("x"))
|
||||
|
||||
@ -1,10 +0,0 @@
|
||||
#lang info
|
||||
|
||||
(define collection 'multi)
|
||||
|
||||
(define deps '(["base" #:version "6.3"]
|
||||
"br-parser-tools-lib"
|
||||
"rackunit-lib"
|
||||
"syntax-color-lib"))
|
||||
|
||||
(define implies '("br-parser-tools-lib"))
|
||||
@ -1,4 +0,0 @@
|
||||
#lang info
|
||||
|
||||
(define scribblings '(("brag.scrbl")))
|
||||
|
||||
@ -0,0 +1,2 @@
|
||||
#lang brag
|
||||
/top : "x"
|
||||
@ -1,13 +1,7 @@
|
||||
#lang info
|
||||
(define name "brag")
|
||||
|
||||
(define collection 'multi)
|
||||
|
||||
(define deps '(["base" #:version "6.3"]
|
||||
"brag-lib"))
|
||||
|
||||
(define build-deps '("at-exp-lib"
|
||||
"br-parser-tools-doc"
|
||||
"racket-doc"
|
||||
"scribble-lib"))
|
||||
|
||||
(define implies '("brag-lib"))
|
||||
(define scribblings '(("brag.scrbl")))
|
||||
(define blurb '("brag: the Beautiful Racket AST Generator. A fork of Danny Yoo's ragg. A design goal is to be easy for beginners to use. Given a grammar in EBNF, brag produces a parser that generates Racket's native syntax objects with full source location."))
|
||||
(define deps (list))
|
||||
(define test-omit-paths '("examples/simple-line-drawing/examples/letter-i.rkt"))
|
||||
@ -0,0 +1,36 @@
|
||||
#lang racket/base
|
||||
|
||||
(require brag/support)
|
||||
|
||||
(provide current-source
|
||||
current-parser-error-handler
|
||||
current-tokenizer-error-handler)
|
||||
|
||||
;; During parsing, we should define the source of the input.
|
||||
(define current-source (make-parameter #f))
|
||||
|
||||
|
||||
;; When an parse error happens, we call the current-parser-error-handler:
|
||||
(define current-parser-error-handler
|
||||
(make-parameter
|
||||
(lambda (tok-name tok-value offset line col span)
|
||||
(raise (exn:fail:parsing
|
||||
(format "Encountered parsing error near ~e (token ~e) while parsing ~e [line=~a, column=~a, offset=~a]"
|
||||
tok-value tok-name
|
||||
(current-source)
|
||||
line col offset)
|
||||
(current-continuation-marks)
|
||||
(list (srcloc (current-source) line col offset span)))))))
|
||||
|
||||
;; When a tokenization error happens, we call the current-tokenizer-error-handler.
|
||||
(define current-tokenizer-error-handler
|
||||
(make-parameter
|
||||
(lambda (tok-type tok-value offset line column span)
|
||||
(raise (exn:fail:parsing
|
||||
(format "Encountered unexpected token ~e (~e) while parsing ~e [line=~a, column=~a, offset=~a]"
|
||||
tok-type
|
||||
tok-value
|
||||
(current-source)
|
||||
line column offset)
|
||||
(current-continuation-marks)
|
||||
(list (srcloc (current-source) line column offset span)))))))
|
||||
@ -0,0 +1,132 @@
|
||||
#lang racket/base
|
||||
(require (for-syntax racket/base "parser.rkt"))
|
||||
(require br-parser-tools/lex
|
||||
(prefix-in : br-parser-tools/lex-sre)
|
||||
"parser.rkt"
|
||||
"rule-structs.rkt"
|
||||
racket/string)
|
||||
|
||||
(provide lex/1 tokenize)
|
||||
(module+ lex-abbrevs
|
||||
(provide hide-char splice-char id-char letter digit NL id))
|
||||
|
||||
;; A newline can be any one of the following.
|
||||
(define-lex-abbrev NL (:or "\r\n" "\r" "\n"))
|
||||
|
||||
;; reserved-chars = chars used for quantifiers & parse-tree filtering
|
||||
(define-for-syntax quantifiers "+:*?{}") ; colon is reserved to separate rules and productions
|
||||
(define-lex-trans reserved-chars
|
||||
(λ(stx) #`(char-set #,(format "~a~a~a" quantifiers hide-char splice-char))))
|
||||
|
||||
(define-lex-trans hide-char-trans (λ(stx) #`(char-set #,(format "~a" hide-char))))
|
||||
(define-lex-trans splice-char-trans (λ(stx) #`(char-set #,(format "~a" splice-char))))
|
||||
|
||||
(define-lex-abbrevs
|
||||
[letter (:or (:/ "a" "z") (:/ #\A #\Z))]
|
||||
[digit (:/ #\0 #\9)]
|
||||
[id-char (:or letter digit (:& (char-set "+:*@!-.$%&/=?^_~<>") (char-complement (reserved-chars))))]
|
||||
[hide-char (hide-char-trans)]
|
||||
[splice-char (splice-char-trans)]
|
||||
)
|
||||
|
||||
(define-lex-abbrev id (:& (complement (:+ digit)) (:+ id-char)))
|
||||
(define-lex-abbrev id-separator (:or ":" "::="))
|
||||
|
||||
(define-lex-abbrev esc-chars (union "\\a" "\\b" "\\t" "\\n" "\\v" "\\f" "\\r" "\\e"))
|
||||
|
||||
(define (unescape-lexeme lexeme quote-char)
|
||||
;; convert the literal string representation back into an escape char with lookup table
|
||||
(define unescapes (hash "a" 7 "b" 8 "t" 9 "n" 10 "v" 11 "f" 12 "r" 13 "e" 27 "\"" 34 "'" 39 "\\" 92))
|
||||
(define pat (regexp (format "(?<=^~a\\\\).(?=~a$)" quote-char quote-char)))
|
||||
(cond
|
||||
[(regexp-match pat lexeme)
|
||||
=> (λ (m) (string quote-char (integer->char (hash-ref unescapes (car m))) quote-char))]
|
||||
[else lexeme]))
|
||||
|
||||
|
||||
(define lex/1
|
||||
(lexer-src-pos
|
||||
;; handle whitespace & escape chars within quotes as literal tokens: "\n" "\t" '\n' '\t'
|
||||
;; match the escaped version, and then unescape them before they become token-LITs
|
||||
[(:: "'"
|
||||
(:or (:* (:or "\\'" esc-chars (:~ "'" "\\"))) "\\\\")
|
||||
"'")
|
||||
(token-LIT (unescape-lexeme lexeme #\'))]
|
||||
[(:: "\""
|
||||
(:or (:* (:or "\\\"" esc-chars (:~ "\"" "\\"))) "\\\\")
|
||||
"\"")
|
||||
(token-LIT (unescape-lexeme lexeme #\"))]
|
||||
[(:or "()" "Ø" "∅") (token-EMPTY lexeme)]
|
||||
["("
|
||||
(token-LPAREN lexeme)]
|
||||
["["
|
||||
(token-LBRACKET lexeme)]
|
||||
[")"
|
||||
(token-RPAREN lexeme)]
|
||||
["]"
|
||||
(token-RBRACKET lexeme)]
|
||||
[hide-char
|
||||
(token-HIDE lexeme)]
|
||||
[splice-char
|
||||
(token-SPLICE lexeme)]
|
||||
["|"
|
||||
(token-PIPE lexeme)]
|
||||
[(:or "+" "*" "?"
|
||||
(:: "{" (:* digit) (:? (:: "," (:* digit))) "}"))
|
||||
(token-REPEAT lexeme)]
|
||||
[whitespace
|
||||
;; Skip whitespace
|
||||
(return-without-pos (lex/1 input-port))]
|
||||
;; Skip comments up to end of line
|
||||
[(:: (:or "#" ";")
|
||||
(complement (:: (:* any-char) NL (:* any-char)))
|
||||
(:or NL ""))
|
||||
(return-without-pos (lex/1 input-port))]
|
||||
[(eof)
|
||||
(token-EOF lexeme)]
|
||||
[(:: id (:* whitespace) id-separator)
|
||||
(token-RULE_HEAD lexeme)]
|
||||
[(:: hide-char id (:* whitespace) id-separator)
|
||||
(token-RULE_HEAD_HIDDEN lexeme)]
|
||||
[(:: splice-char id (:* whitespace) id-separator)
|
||||
(token-RULE_HEAD_SPLICED lexeme)]
|
||||
[id
|
||||
(token-ID lexeme)]
|
||||
|
||||
;; We call the error handler for everything else:
|
||||
[(:: any-char)
|
||||
(let-values ([(rest-of-text end-pos-2)
|
||||
(lex-nonwhitespace input-port)])
|
||||
((current-parser-error-handler)
|
||||
#f
|
||||
'error
|
||||
(string-append lexeme rest-of-text)
|
||||
(position->pos start-pos)
|
||||
(position->pos end-pos-2)))]))
|
||||
|
||||
|
||||
;; This is the helper for the error production.
|
||||
(define lex-nonwhitespace
|
||||
(lexer
|
||||
[(:+ (char-complement whitespace))
|
||||
(values lexeme end-pos)]
|
||||
[any-char
|
||||
(values lexeme end-pos)]
|
||||
[(eof)
|
||||
(values "" end-pos)]))
|
||||
|
||||
|
||||
|
||||
;; position->pos: position -> pos
|
||||
;; Converts position structures from br-parser-tools/lex to our own pos structures.
|
||||
(define (position->pos a-pos)
|
||||
(pos (position-offset a-pos)
|
||||
(position-line a-pos)
|
||||
(position-col a-pos)))
|
||||
|
||||
|
||||
|
||||
;; tokenize: input-port -> (-> token)
|
||||
(define (tokenize ip #:source [source (object-name ip)])
|
||||
(λ () (parameterize ([file-path source])
|
||||
(lex/1 ip))))
|
||||
@ -0,0 +1,34 @@
|
||||
#lang racket/base
|
||||
(require br-parser-tools/lex)
|
||||
|
||||
(provide (all-defined-out))
|
||||
|
||||
;; During parsing, we should define the source of the input.
|
||||
(define current-source (make-parameter #f))
|
||||
|
||||
|
||||
;; When bad things happen, we need to emit errors with source location.
|
||||
(struct exn:fail:parse-grammar exn:fail (srclocs)
|
||||
#:transparent
|
||||
#:property prop:exn:srclocs (lambda (instance)
|
||||
(exn:fail:parse-grammar-srclocs instance)))
|
||||
|
||||
(define current-parser-error-handler
|
||||
(make-parameter
|
||||
(lambda (tok-ok? tok-name tok-value start-pos end-pos)
|
||||
(raise (exn:fail:parse-grammar
|
||||
(format "Error while parsing grammar near: ~e [line=~a, column~a, position=~a]"
|
||||
tok-value
|
||||
(position-line start-pos)
|
||||
(position-col start-pos)
|
||||
(position-offset start-pos))
|
||||
(current-continuation-marks)
|
||||
(list (srcloc (current-source)
|
||||
(position-line start-pos)
|
||||
(position-col start-pos)
|
||||
(position-offset start-pos)
|
||||
(if (and (number? (position-offset end-pos))
|
||||
(number? (position-offset start-pos)))
|
||||
(- (position-offset end-pos)
|
||||
(position-offset start-pos))
|
||||
#f))))))))
|
||||
@ -0,0 +1,8 @@
|
||||
#lang racket/base
|
||||
(require brag/examples/hide-top
|
||||
brag/support
|
||||
rackunit)
|
||||
|
||||
;; check that the top rule name can be cut (hidden)
|
||||
|
||||
(check-equal? (parse-to-datum "x") '("x"))
|
||||
@ -0,0 +1,13 @@
|
||||
#lang info
|
||||
|
||||
(define version "1.0")
|
||||
(define collection 'multi)
|
||||
|
||||
(define deps '("base"
|
||||
"br-parser-tools-lib"
|
||||
"rackunit-lib"))
|
||||
(define build-deps '("at-exp-lib"
|
||||
"br-parser-tools-doc"
|
||||
"racket-doc"
|
||||
"scribble-lib"))
|
||||
(define update-implies '("br-parser-tools-lib"))
|
||||
Loading…
Reference in New Issue