Ecmascript Parser

Ecmascript instruction parser. Tested on popular Javascript modules (i.e. JQuery)

How it works

• Download JXcore
• type jx install ecma-parser or npm install ecma-parser

Sample Code:

var parser = require('ecma-parser');

var js_code = "\
  var x = 1;\
  var y = 2;\
  console.log(x + y);\
";

var bl = parser.parse("test.js", js_code);
parser.printBlocks(bl);

Output:

---> ROOT { x: {}, y: {} }
SPACE (1:1)
SET_VARIABLE 1:3
SPACE (1:6)
WORD: x (new_variable) (1:7)
SPACE (1:8)
EQUALS (1:9)
SPACE (1:10)
WORD: 1 (number) (1:11)
SEMI_COLON (1:12)
SPACE (1:13)
SET_VARIABLE 1:15
SPACE (1:18)
WORD: y (new_variable) (1:19)
SPACE (1:20)
EQUALS (1:21)
SPACE (1:22)
WORD: 2 (number) (1:23)
SEMI_COLON (1:24)
SPACE (1:25)
WORD: console (1:27)
DOT (1:34)
WORD: log (1:35)
PTS_OPEN (1:38)
WORD: x (1:39)
SPACE (1:40)
PLUS (1:41)
SPACE (1:42)
WORD: y (1:43)
PTS_CLOSE (1:44)
SEMI_COLON (1:45)

API

.parse (string filename, string source_code)

Parse Javascript code and return instruction blocks

.printBlocks (blocks)

Print instruction blocks on console

.blockToCode (blocks, [optional] filename)

Return source code for the instruction block

Blocks

.variables : Scope variables
.subs : Array of sub instructions or blocks
.type : Instruction type
.index : Instruction start index
.length : Length of instruction
.repeats : If true, delimiter should repeat on output .length times
.delimiter : Instruction identifier
.dataType : Data type of the instruction block
.rowIndex : Row index of the instruction
.columnIndex : Column index of the instruction
.getData() : Get the string data from the instruction (name of the variable for WORDs)
.isNewDefinition() : Is this block represents a new named definition?
.isProperty() : Is this block represents an Object property ?
.updateName(name) : Update the variable name (only for the current instance)
.getPreviousBlock(noskip) : Returns previous instruction block (None space, comment, new line or semi colon)
.getNextBlock(noskip) : Returns previous instruction block (None space, comment, new line or semi colon)

• set noskip = true to get next or previous block regardless from it's type

Samples

Visit samples folder. i.e Use parse_folder.js under samples folder. (*nix only)

jx samples/parse_folder.js jquery.1.1.min.x.js

License

The MIT License (MIT)

Copyright (c) 2015 Oguz Bastemur

Contribution

This particular project is intended to parse EcmaScript 6 compliant Javascript code. Feel free to contribute under the MIT and intention of this project.