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1 // Generated by CoffeeScript 1.8.0
2 (function() {
3 var Scope, extend, last, _ref;
4
5 _ref = require('./helpers'), extend = _ref.extend, last = _ref.last;
6
7 exports.Scope = Scope = (function() {
8 Scope.root = null;
9
10 function Scope(parent, expressions, method) {
11 this.parent = parent;
12 this.expressions = expressions;
13 this.method = method;
14 this.variables = [
15 {
16 name: 'arguments',
17 type: 'arguments'
18 }
19 ];
20 this.positions = {};
21 if (!this.parent) {
22 Scope.root = this;
23 }
24 }
25
26 Scope.prototype.add = function(name, type, immediate) {
27 if (this.shared && !immediate) {
28 return this.parent.add(name, type, immediate);
29 }
30 if (Object.prototype.hasOwnProperty.call(this.positions, name)) {
31 return this.variables[this.positions[name]].type = type;
32 } else {
33 return this.positions[name] = this.variables.push({
34 name: name,
35 type: type
36 }) - 1;
37 }
38 };
39
40 Scope.prototype.namedMethod = function() {
41 var _ref1;
42 if (((_ref1 = this.method) != null ? _ref1.name : void 0) || !this.parent) {
43 return this.method;
44 }
45 return this.parent.namedMethod();
46 };
47
48 Scope.prototype.find = function(name) {
49 if (this.check(name)) {
50 return true;
51 }
52 this.add(name, 'var');
53 return false;
54 };
55
56 Scope.prototype.parameter = function(name) {
57 if (this.shared && this.parent.check(name, true)) {
58 return;
59 }
60 return this.add(name, 'param');
61 };
62
63 Scope.prototype.check = function(name) {
64 var _ref1;
65 return !!(this.type(name) || ((_ref1 = this.parent) != null ? _ref1.check(name) : void 0));
66 };
67
68 Scope.prototype.temporary = function(name, index) {
69 if (name.length > 1) {
70 return '_' + name + (index > 1 ? index - 1 : '');
71 } else {
72 return '_' + (index + parseInt(name, 36)).toString(36).replace(/\d/g, 'a');
73 }
74 };
75
76 Scope.prototype.type = function(name) {
77 var v, _i, _len, _ref1;
78 _ref1 = this.variables;
79 for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
80 v = _ref1[_i];
81 if (v.name === name) {
82 return v.type;
83 }
84 }
85 return null;
86 };
87
88 Scope.prototype.freeVariable = function(name, reserve) {
89 var index, temp;
90 if (reserve == null) {
91 reserve = true;
92 }
93 index = 0;
94 while (this.check((temp = this.temporary(name, index)))) {
95 index++;
96 }
97 if (reserve) {
98 this.add(temp, 'var', true);
99 }
100 return temp;
101 };
102
103 Scope.prototype.assign = function(name, value) {
104 this.add(name, {
105 value: value,
106 assigned: true
107 }, true);
108 return this.hasAssignments = true;
109 };
110
111 Scope.prototype.hasDeclarations = function() {
112 return !!this.declaredVariables().length;
113 };
114
115 Scope.prototype.declaredVariables = function() {
116 var realVars, tempVars, v, _i, _len, _ref1;
117 realVars = [];
118 tempVars = [];
119 _ref1 = this.variables;
120 for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
121 v = _ref1[_i];
122 if (v.type === 'var') {
123 (v.name.charAt(0) === '_' ? tempVars : realVars).push(v.name);
124 }
125 }
126 return realVars.sort().concat(tempVars.sort());
127 };
128
129 Scope.prototype.assignedVariables = function() {
130 var v, _i, _len, _ref1, _results;
131 _ref1 = this.variables;
132 _results = [];
133 for (_i = 0, _len = _ref1.length; _i < _len; _i++) {
134 v = _ref1[_i];
135 if (v.type.assigned) {
136 _results.push("" + v.name + " = " + v.type.value);
137 }
138 }
139 return _results;
140 };
141
142 return Scope;
143
144 })();
145
146 }).call(this);