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| /*!
* Copyright (C) 2017 Glayzzle (BSD3 License)
* @authors https://github.com/glayzzle/php-parser/graphs/contributors
* @url http://gla*yzzle.com
*/
var Location = require('./ast/location');
var Position = require('./ast/position');
/**
* ## Class hierarchy
*
* - [Location](#location)
* - [Position](#position)
* - [Node](#node)
* - [Identifier](#identifier)
* - [TraitUse](#traituse)
* - [TraitAlias](#traitalias)
* - [TraitPrecedence](#traitprecedence)
* - [Entry](#entry)
* - [Case](#case)
* - [Label](#label)
* - [Doc](#doc)
* - [Error](#error)
* - [Expression](#expression)
* - [Array](#array)
* - [Variable](#variable)
* - [Variadic](#variadic)
* - [ConstRef](#constref)
* - [Yield](#yield)
* - [YieldFrom](#yieldfrom)
* - [Lookup](#lookup)
* - [PropertyLookup](#propertylookup)
* - [StaticLookup](#staticlookup)
* - [OffsetLookup](#offsetlookup)
* - [Operation](#operation)
* - [Pre](#pre)
* - [Post](#post)
* - [Bin](#bin)
* - [Parenthesis](#parenthesis)
* - [Unary](#unary)
* - [Cast](#cast)
* - [Literal](#literal)
* - [Boolean](#boolean)
* - [String](#string)
* - [Number](#number)
* - [Inline](#inline)
* - [Magic](#magic)
* - [Nowdoc](#nowdoc)
* - [Encapsed](#encapsed)
* - [Statement](#statement)
* - [Eval](#eval)
* - [Exit](#exit)
* - [Halt](#halt)
* - [Clone](#clone)
* - [Declare](#declare)
* - [Global](#global)
* - [Static](#static)
* - [Include](#include)
* - [Assign](#assign)
* - [RetIf](#retif)
* - [If](#if)
* - [Do](#do)
* - [While](#while)
* - [For](#for)
* - [Foreach](#foreach)
* - [Switch](#switch)
* - [Goto](#goto)
* - [Silent](#silent)
* - [Try](#try)
* - [Catch](#catch)
* - [Throw](#throw)
* - [Call](#call)
* - [Closure](#closure)
* - [New](#new)
* - [UseGroup](#usegroup)
* - [UseItem](#useitem)
* - [Block](#block)
* - [Program](#program)
* - [Namespace](#namespace)
* - [Sys](#sys)
* - [Echo](#echo)
* - [List](#list)
* - [Print](#print)
* - [Isset](#isset)
* - [Unset](#unset)
* - [Empty](#empty)
* - [Declaration](#declaration)
* - [Class](#class)
* - [Interface](#interface)
* - [Trait](#trait)
* - [Constant](#constant)
* - [ClassConstant](#classconstant)
* - [Function](#function)
* - [Method](#method)
* - [Parameter](#parameter)
* - [Property](#property)
* ---
*/
/**
* The AST builder class
* @constructor AST
* @property {Boolean} withPositions - Should locate any node (by default false)
* @property {Boolean} withSource - Should extract the node original code (by default false)
*/
var AST = function(withPositions, withSource) {
this.withPositions = withPositions;
this.withSource = withSource;
};
/**
* Create a position node from specified parser
* including it's lexer current state
* @param {Parser}
* @return {Position}
* @private
*/
AST.prototype.position = function(parser) {
return new Position(
parser.lexer.yylloc.first_line,
parser.lexer.yylloc.first_column,
parser.lexer.yylloc.first_offset
);
};
/**
* Prepares an AST node
* @param {String|null} kind - Defines the node type
* (if null, the kind must be passed at the function call)
* @param {Parser} parser - The parser instance (use for extracting locations)
* @return {Function}
*/
AST.prototype.prepare = function(kind, parser) {
var start = null;
if (this.withPositions || this.withSource) {
start = this.position(parser);
}
var self = this;
// returns the node
return function() {
var location = null;
var args = Array.prototype.slice.call(arguments);
if (self.withPositions || self.withSource) {
var src = null;
if (self.withSource) {
src = parser.lexer._input.substring(
start.offset,
parser.lexer.yylloc.prev_offset
);
}
Eif (self.withPositions) {
location = new Location(src, start, new Position(
parser.lexer.yylloc.prev_line,
parser.lexer.yylloc.prev_column,
parser.lexer.yylloc.prev_offset
));
} else {
location = new Location(src, null, null);
}
// last argument is allways the location
args.push(location);
}
// handle lazy kind definitions
if (!kind) {
kind = args.shift();
}
// build the object
var node = self[kind];
Iif (typeof node !== 'function') {
throw new Error('Undefined node "'+kind+'"');
}
var result = Object.create(node.prototype);
node.apply(result, args);
if (
result.kind === 'bin' &&
result.right &&
typeof result.right.precedence === 'function'
) {
var out = result.right.precedence(result);
if (out) { // shift with precedence
result = out;
}
} else if (result.kind === 'unary' && result.what) {
var out = result.precedence(result.what);
if (out) { // shift with precedence
result = out;
}
}
return result;
};
};
// Define all AST nodes
[
require('./ast/array'),
require('./ast/assign'),
require('./ast/bin'),
require('./ast/block'),
require('./ast/boolean'),
require('./ast/break'),
require('./ast/call'),
require('./ast/case'),
require('./ast/cast'),
require('./ast/catch'),
require('./ast/class'),
require('./ast/classconstant'),
require('./ast/clone'),
require('./ast/closure'),
require('./ast/constant'),
require('./ast/constref'),
require('./ast/continue'),
require('./ast/declaration'),
require('./ast/declare'),
require('./ast/do'),
require('./ast/doc'),
require('./ast/echo'),
require('./ast/empty'),
require('./ast/encapsed'),
require('./ast/entry'),
require('./ast/error'),
require('./ast/eval'),
require('./ast/exit'),
require('./ast/expression'),
require('./ast/for'),
require('./ast/foreach'),
require('./ast/function'),
require('./ast/global'),
require('./ast/goto'),
require('./ast/halt'),
require('./ast/identifier'),
require('./ast/if'),
require('./ast/include'),
require('./ast/inline'),
require('./ast/interface'),
require('./ast/isset'),
require('./ast/label'),
require('./ast/list'),
require('./ast/literal'),
require('./ast/lookup'),
require('./ast/magic'),
require('./ast/method'),
require('./ast/namespace'),
require('./ast/new'),
require('./ast/node'),
require('./ast/nowdoc'),
require('./ast/number'),
require('./ast/offsetlookup'),
require('./ast/operation'),
require('./ast/parameter'),
require('./ast/parenthesis'),
require('./ast/post'),
require('./ast/pre'),
require('./ast/print'),
require('./ast/program'),
require('./ast/property'),
require('./ast/propertylookup'),
require('./ast/retif'),
require('./ast/return'),
require('./ast/silent'),
require('./ast/statement'),
require('./ast/static'),
require('./ast/staticlookup'),
require('./ast/string'),
require('./ast/switch'),
require('./ast/sys'),
require('./ast/throw'),
require('./ast/trait'),
require('./ast/traitalias'),
require('./ast/traitprecedence'),
require('./ast/traituse'),
require('./ast/try'),
require('./ast/unary'),
require('./ast/unset'),
require('./ast/usegroup'),
require('./ast/useitem'),
require('./ast/variable'),
require('./ast/variadic'),
require('./ast/while'),
require('./ast/yield'),
require('./ast/yieldfrom')
].forEach(function (ctor) {
var kind = ctor.prototype.constructor.name.toLowerCase();
if (kind[0] === '_') kind = kind.substring(1);
AST.prototype[kind] = ctor;
});
module.exports = AST;
|