ref: 9e4951e219841e3b2b4091998cd4bd6db396bb39
dir: /README.md/
# minipeg
`minipeg` is a tool for generating recursive-descent parsers: programs that perform pattern matching on
text.
Unlike `lex` and `yacc`, `minipeg` supports unlimited backtracking, provide ordered choice as a means for disambiguation, and can combine scanning (lexical analysis) and parsing (syntactic analysis) into a single activity.
`minipeg` is also easy to embed in your C project by copying the amalgamated release (which has the permissive license MIT license).
## History
`minipeg` started as a fork of peg/leg https://www.piumarta.com/software/peg/. The aim of the fork was removal of the redundant and confusing alternate syntax,
and improving ease of distribution by adding amalgamated releases.
## References
* [Ford 2004] Bryan Ford, [*Parsing Expression Grammars: A Recognition-Based Syntactic Foundation*][1]. ACM SIGPLAN Symposium on Principles of Programming Languages (POPL), 2004.
[1]: http://bford.info/pub/lang/peg "Parsing Expression Grammars: A Recognition-Based Syntactic Foundation"
## Version history
* 0.1.19
* **0.1.18** ([zip](../../archive/0.1.18.zip), [tar.gz](../../archive/0.1.18.tar.gz)) — 2016-07-22
Add `-P` option to disable `#line` directives.
Emit `#line` directives for all actions.
* **0.1.17** ([zip](../../archive/0.1.17.zip), [tar.gz](../../archive/0.1.17.tar.gz)) — 2016-07-14
Emit `#line` directives for header and trailer in the generated source file.
* **0.1.16** ([zip](../../archive/0.1.16.zip), [tar.gz](../../archive/0.1.16.tar.gz)) — 2016-06-25
Add `@{...}` actions that are performed during matching.
* **0.1.15** ([zip](../../archive/0.1.15.zip), [tar.gz](../../archive/0.1.15.tar.gz)) — 2013-12-17
Calls to `YY_FREE` fixed (thanks to Andrew Dunham).
* **0.1.14** ([zip](../../archive/0.1.14.zip), [tar.gz](../../archive/0.1.14.tar.gz)) — 2013-12-01
Documentation typos fixed (thanks to Giulio Paci).
* **0.1.13** ([zip](../../archive/0.1.13.zip), [tar.gz](../../archive/0.1.13.tar.gz)) — 2013-08-16
Predicate actions can refer to `yytext` (thanks to Grégory Pakosz).
Hexadecimal character escapes are supported by `leg` (thanks to Hugo Etchegoyen).
* **0.1.12** ([zip](../../archive/0.1.12.zip), [tar.gz](../../archive/0.1.12.tar.gz)) — 2013-07-20
Use BSD-licensed `getopt()` in Windows build.
Verbose mode handles Variable nodes.
* **0.1.11** ([zip](../../archive/0.1.11.zip), [tar.gz](../../archive/0.1.11.tar.gz)) — 2013-06-03
Add error actions via `"~"` operator.
Support declaration of local variables at the top level of semantic actions.
Dynamically grow data structures to remove artificial limits on rule recursion (thanks to Alex Klinkhamer).
Many small changes to better support C++.
Add build files for Win32 and MacOS (thanks to Fyodor Sheremetyev).
Update manual page to describe new features.
* **0.1.10** — missing in upstream
* **0.1.9** ([zip](../../archive/0.1.9.zip), [tar.gz](../../archive/0.1.9.tar.gz)) — 2012-04-29
Move global state into a structure to facilitate reentrant and thread-safe parsers (thanks to Dmitry Lipovoi).
* **0.1.8** ([zip](../../archive/0.1.8.zip), [tar.gz](../../archive/0.1.8.tar.gz)) — 2012-03-29
Allow nested, matched braces within actions.
* **0.1.7** ([zip](../../archive/0.1.7.zip), [tar.gz](../../archive/0.1.7.tar.gz)) — 2011-11-25
Fix matching of 8-bit chars to allow utf-8 sequences in matching expressions (thanks to Grégory Pakosz).
* **0.1.6** ([zip](../../archive/0.1.6.zip), [tar.gz](../../archive/0.1.6.tar.gz)) — 2011-11-24
Allow octal escapes in character classes.
* **0.1.5** ([zip](../../archive/0.1.5.zip), [tar.gz](../../archive/0.1.5.tar.gz)) — 2011-11-24
Remove dwarf sym dirs when cleaning.
Fix size calculation when resizing text buffers.
Backslash can be escaped.
* **0.1.4** ([zip](../../archive/0.1.4.zip), [tar.gz](../../archive/0.1.4.tar.gz)) — 2009-08-26
Fix match of a single single quote character.
Rename `getline` -> `nextline` to avoid C namespace conflict.
* **0.1.3** ([zip](../../archive/0.1.3.zip), [tar.gz](../../archive/0.1.3.tar.gz)) — 2007-09-13
Allow matched braces inside `leg` actions.
Handle empty rules.
Handle empty grammars.
* **0.1.2** ([zip](../../archive/0.1.2.zip), [tar.gz](../../archive/0.1.2.tar.gz)) — 2007-08-31
Grow buffers while (not if) they are too small.
Remove dependencies on grammar files.
Add more basic examples.
* **0.1.1** ([zip](../../archive/0.1.1.zip), [tar.gz](../../archive/0.1.1.tar.gz)) — 2007-05-15
First public release.