parsertl lexertl playground
You can try it here https://mingodad.github.io/parsertl-playground/playground/ .
A web based playground for https://github.com/BenHanson/parsertl14 and https://github.com/BenHanson/lexertl14 based on https://github.com/BenHanson/gram_grep .
The playground website is based on https://yhirose.github.io/cpp-peglib/ and also with modifications based on https://chrishixon.github.io/chpeg/playground/ .
The playground save the grammar and the input in the local storage when you click Parse.
The playground has the following main elements:
- A select labeled
Examples to choose one available example to start with.
- A select labeled
Generate to optionally export Yacc/EBNF (for railroad diagrams).
- A button labeled
Parse to build/execute the parser/grammar in the top left side editor over the input in the top right side editor.
- A bottom right side area to display info about the grammar (errors are clickable links to jump to line in the editor).
- A bottom left side area to display info about the input source parsing results (errors are clickabel to jump to line in the editor).
- A center left side foldable read only editor to show debug info about lexing/parsing the grammar or the input.
The availabel debugging options are:
- Input parse tree pruned
- Input parse tree full
- Input lexer dump
- Input parse trace
- Grammar parse tree pruned
- Grammar parse tree full
- Grammar lexer dump
- Grammar parse trace
- Grammar lexer state machine
- Grammar parse state machine
This project can also be built as a command line tool (see build.sh) then you can use it to check grammar/input on your disc:
./parsertl-playground
usage: ./parsertl-playground [options] grammar_fname input_fname
options can be:
-dumpil Dump input lexer
-dumpiptree Dump input parser tree
-dumpiptrace Dump input parser trace
-dumpgl Dump grammar lexer
-dumpgptree Dump grammar parser tree
-dumpgptrace Dump grammar parser trace
-dumpglsm Dump grammar lexer state machine
-dumpgsm Dump grammar parser state machine
-dumpAsEbnfRR Dump grammar as EBNF for railroad diagram
-dumpAsYacc Dump grammar as Yacc
-pruneptree Do not show empty parser tree nodes
-verbose Show several metrics for debug
The grammar used internally to parse the user grammar is this one playground-master.g the grammar has 4 sections:
/*Grammar header*/
%%
/*Grammar rules*/
%%
/*Lex header*/
%%
/*Lex rules*/
%%
The first two sections are equivalent to yacc/bison format and the other two sections are equivalent to lex/flex format.
Related projects:
- ANTLR Lab http://lab.antlr.org/
- Lezer playground https://lezer-playground.vercel.app/
- JS-based AST explorer https://astexplorer.net/
- clang visualizer https://godblot.org
- Tree-sitter https://tree-sitter.github.io/tree-sitter/playground
- Lpegrex/Lua https://mingodad.github.io/lua-wasm-playground/ (tree-sitter-ebnf are supported. LPEG/dkjson is the default parser of luvit.io)
- CocoR https://mingodad.github.io/CocoR-Typescript/playground (nice JSON bnf)
- CHPEG https://chrishixon.github.io/chpeg/playground/
- Cpp-Peglib https://yhirose.github.io/cpp-peglib/
- PCRE Regex https://regex101.com (nice JSON bnf)
- Pest https://pest.rs/
- Jison https://gerhobbelt.github.io/jison/try/
- PeggyJS https://peggyjs.org/online.html
- Lark https://www.lark-parser.org/ide/ (py3 grammar supported)
- Ohm https://ohmjs.org/editor/ (es5 tree supported)
- Owl https://ianh.github.io/owl/try/#example (operators infix precedence supported)
- Nearley Parser https://omrelli.ug/nearley-playground/ (NO web playgrounds below)
- Lalrpop http://lalrpop.github.io/lalrpop/
- Lezer https://lezer.codemirror.net/examples/basic/
- Syntax https://github.com/DmitrySoshnikov/syntax
- Antlr https://github.com/antlr/antlr4
- Textmapper https://textmapper.org/
- Railroad generator https://bottlecaps.de/rr/ui (json.org diagram)
- Convert (grammar conversion) https://www.bottlecaps.de/convert/
- Rex parser generator https://www.bottlecaps.de/rex/
- LALR https://github.com/cwbaker/lalr
- Ebnf Studio Qt https://github.com/rochus-keller/EbnfStudio
- Flexcpp https://gitlab.com/fbb-git/flexcpp
- Reflex https://www.genivia.com/doc/reflex/html/
- Bison https://www.gnu.org/software/bison/
- Flex https://github.com/westes/flex
- Byacc https://www.invisible-island.net/byacc/byacc.html
- BNF playground https://bnfplayground.pauliankline.com/
- Lrstar an LR(*) parser generator for C++ https://github.com/VestniK/lrstar/blob/master/README.md
- LangCC “A Next-Generation Compiler Compiler” https://github.com/jzimmerman/langcc