Added the LPeg extension and an example project

.gitignore

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+/.internal
+/build
+.externalToolBuilders
+.DS_Store
+Thumbs.db
+.lock-wscript
+*.pyc
+.project
+.cproject
+builtins

README.md

@@ -1,2 +1,21 @@
-# defold-lpeg
-LPeg wrapper for the Defold game engine
+# LPeg for Defold
+LPeg extension for the Defold game engine. [LPeg](http://www.inf.puc-rio.br/~roberto/lpeg/) is a pattern-matching library by [Roberto Ierusalimschy](http://www.inf.puc-rio.br/~roberto/) for Lua.
+
+The extension includes source code of LPeg 1.0.2 (MIT Licence).
+
+## Installation
+
+Add the link to the latest [release zip-archive](https://github.com/astrochili/defold-lpeg/releases) as a [library dependency](http://www.defold.com/manuals/libraries/) in the Defold project configuration.
+
+## Usage
+
+All operations are accessible through the global variable ```lpeg```.
+
+```lua
+local P = lpeg.P 
+
+local pattern = P'a' * P'b' ^ 0
+local result = lpeg.match(pattern, 'abbc')
+
+print(result) --> 4
+```

example/example.collection

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+name: "main"
+scale_along_z: 0
+embedded_instances {
+  id: "example"
+  data: "components {\n"
+  "  id: \"main\"\n"
+  "  component: \"/example/example.script\"\n"
+  "  position {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "  }\n"
+  "  rotation {\n"
+  "    x: 0.0\n"
+  "    y: 0.0\n"
+  "    z: 0.0\n"
+  "    w: 1.0\n"
+  "  }\n"
+  "}\n"
+  ""
+  position {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+  }
+  rotation {
+    x: 0.0
+    y: 0.0
+    z: 0.0
+    w: 1.0
+  }
+  scale3 {
+    x: 1.0
+    y: 1.0
+    z: 1.0
+  }
+}

example/example.script

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+function init(self)
+  -- This example taken from the article by Leaf Corcoran, creator of MoonScript
+  -- https://leafo.net/guides/parsing-expression-grammars.html
+
+  local white = lpeg.S(" \t\r\n") ^ 0
+
+  local integer = white * lpeg.R("09") ^ 1 / tonumber
+  local muldiv = white * lpeg.C(lpeg.S("/*"))
+  local addsub = white * lpeg.C(lpeg.S("+-"))
+
+  local function node(p)
+    return p / function(left, op, right)
+      return { op, left, right }
+    end
+  end
+
+  local calculator = lpeg.P({
+    "input",
+    input = lpeg.V("exp") * -1,
+    exp = lpeg.V("term") + lpeg.V("factor") + integer,
+    term = node((lpeg.V("factor") + integer) * addsub * lpeg.V("exp")),
+    factor = node(integer * muldiv * (lpeg.V("factor") + integer))
+  })
+
+  local result = calculator:match("5*3*2")
+  pprint(result) --> {"*", 5, {"*", 3, 2}}
+end

game.project

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+[bootstrap]
+main_collection = /example/example.collectionc
+
+[script]
+shared_state = 1
+
+[display]
+width = 960
+height = 640
+
+[android]
+input_method = HiddenInputField
+
+[project]
+title = LPeg for Defold
+
+[library]
+include_dirs = lpeg
+
+[input]
+game_binding = /builtins/input/all.input_bindingc
+gamepads = /builtins/input/default.gamepadsc
+

lpeg/ext.manifest

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+name: "lpeg"

lpeg/src/lpeg.cpp

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+/*
+** LPeg extension for the Defold game engine
+** https://github.com/astrochili/defold-lpeg
+*/
+
+#define LIB_NAME "lpeg"
+#define MODULE_NAME "lpeg"
+
+#include <dmsdk/sdk.h>
+#include "wrapper.h"
+
+dmExtension::Result InitializeMyExtension(dmExtension::Params* params)
+{
+    luaopen_lpeg(params->m_L);
+    lua_pop(params->m_L, 2);
+
+    dmLogInfo("Registered %s Extension\n", MODULE_NAME);
+    return dmExtension::RESULT_OK;
+}
+
+dmExtension::Result FinalizeMyExtension(dmExtension::Params* params)
+{
+    dmLogInfo("Finalize %s Extension\n", MODULE_NAME);
+    return dmExtension::RESULT_OK;
+}
+
+DM_DECLARE_EXTENSION(lpeg, LIB_NAME, 0, 0, InitializeMyExtension, 0, 0, FinalizeMyExtension)

lpeg/src/lpeg/HISTORY

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+HISTORY for LPeg 1.0.2
+
+* Changes from version 1.0.1 to 1.0.2
+  ---------------------------------
+  + some bugs fixed
+
+* Changes from version 0.12 to 1.0.1
+  ---------------------------------
+  + group "names" can be any Lua value
+  + some bugs fixed
+  + other small improvements
+
+* Changes from version 0.11 to 0.12
+  ---------------------------------
+  + no "unsigned short" limit for pattern sizes
+  + mathtime captures considered nullable
+  + some bugs fixed
+
+* Changes from version 0.10 to 0.11
+  -------------------------------
+  + complete reimplementation of the code generator
+  + new syntax for table captures
+  + new functions in module 're'
+  + other small improvements
+
+* Changes from version 0.9 to 0.10
+  -------------------------------
+  + backtrack stack has configurable size
+  + better error messages
+  + Notation for non-terminals in 're' back to A instead o <A>
+  + experimental look-behind pattern
+  + support for external extensions
+  + works with Lua 5.2
+  + consumes less C stack
+
+  - "and" predicates do not keep captures
+
+* Changes from version 0.8 to 0.9
+  -------------------------------
+  + The accumulator capture was replaced by a fold capture;
+    programs that used the old 'lpeg.Ca' will need small changes.
+  + Some support for character classes from old C locales.
+  + A new named-group capture.
+
+* Changes from version 0.7 to 0.8
+  -------------------------------
+  + New "match-time" capture.
+  + New "argument capture" that allows passing arguments into the pattern.
+  + Better documentation for 're'.
+  + Several small improvements for 're'.
+  + The 're' module has an incompatibility with previous versions:
+    now, any use of a non-terminal must be enclosed in angle brackets
+    (like <B>).
+
+* Changes from version 0.6 to 0.7
+  -------------------------------
+  + Several improvements in module 're':
+    - better documentation;
+    - support for most captures (all but accumulator);
+    - limited repetitions p{n,m}.
+  + Small improvements in efficiency.
+  + Several small bugs corrected (special thanks to Hans Hagen
+    and Taco Hoekwater).
+
+* Changes from version 0.5 to 0.6
+  -------------------------------
+  + Support for non-numeric indices in grammars.
+  + Some bug fixes (thanks to the luatex team).
+  + Some new optimizations; (thanks to Mike Pall).
+  + A new page layout (thanks to Andre Carregal).
+  + Minimal documentation for module 're'.
+
+* Changes from version 0.4 to 0.5
+  -------------------------------
+  + Several optimizations.
+  + lpeg.P now accepts booleans.
+  + Some new examples.
+  + A proper license.
+  + Several small improvements.
+
+* Changes from version 0.3 to 0.4
+  -------------------------------
+  + Static check for loops in repetitions and grammars.
+  + Removed label option in captures.
+  + The implementation of captures uses less memory.
+
+* Changes from version 0.2 to 0.3
+  -------------------------------
+  + User-defined patterns in Lua.
+  + Several new captures.
+
+* Changes from version 0.1 to 0.2
+  -------------------------------
+  + Several small corrections.
+  + Handles embedded zeros like any other character.
+  + Capture "name" can be any Lua value.
+  + Unlimited number of captures.
+  + Match gets an optional initial position.
+
+(end of HISTORY)

lpeg/src/lpeg/lauxlib.h

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+/*
+** LPeg extension for the Defold game engine
+** https://github.com/astrochili/defold-lpeg
+**
+** Placeholder for the lauxlib.h that required by LPeg.
+*/
+
+#include <dmsdk/sdk.h>