jsstana

jsstana

s-expression match patterns for Mozilla Parser AST

Synopsis

var jsstana = require("jsstana");
var esprima = require("esprima");

var contents = // ...
var syntax = esprima.parse(syntax);

jsstana.traverse(syntax, function (node) {
    jsstana.traverse(syntax, function (node) {
     var m = jsstana.match("(call alert ?argument)", node);
  if (m) {
    console.log("alert called with argument", m.argument);
  }
});

Documentation

Pattern syntax

(undefined)

matches undefined node

(return value)

Matches ReturnStatement.

(var name init)

Matches `VariableDeclarator

(call callee arg0...argn)

Matches CallExpression.

(member object property)

Matches MemberExpression.

(property object property)

Matches non computed MemberExpression i.e. foo.bar.

(subscript object property)

Matches computed MemberExpression i.e. foo[bar].

(lookup var.name)

Helper macro for nested variable access. (lookup foo.bar.baz) is equivalent to (property (property foo bar) baz).

(ternary test con alt)

Matches ConditionalExpression.

match(pattern, node)

Match node against pattern. If pattern matches returns an object with match captures. Otherwise returns undefined.

This function is autocurried ie. when one argument is passed, returns function node -> matchresult.

This function is also memoized on the pattern, ie each pattern is compiled only once.

Contributing

In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

Release History

• 0.0.2 Dev setup
• 0.0.1 Preview release

License

Copyright (c) 2013 Oleg Grenrus. Licensed under the BSD3 license.