122 lines
3.3 KiB
JavaScript
122 lines
3.3 KiB
JavaScript
(function() {
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var Scope, extend, last, _ref;
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_ref = require('./helpers'), extend = _ref.extend, last = _ref.last;
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exports.Scope = Scope = (function() {
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Scope.root = null;
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function Scope(parent, expressions, method) {
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this.parent = parent;
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this.expressions = expressions;
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this.method = method;
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this.variables = [
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{
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name: 'arguments',
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type: 'arguments'
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}
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];
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this.positions = {};
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if (!this.parent) Scope.root = this;
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}
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Scope.prototype.add = function(name, type, immediate) {
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if (this.shared && !immediate) return this.parent.add(name, type, immediate);
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if (Object.prototype.hasOwnProperty.call(this.positions, name)) {
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return this.variables[this.positions[name]].type = type;
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} else {
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return this.positions[name] = this.variables.push({
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name: name,
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type: type
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}) - 1;
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}
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};
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Scope.prototype.find = function(name, options) {
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if (this.check(name, options)) return true;
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this.add(name, 'var');
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return false;
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};
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Scope.prototype.parameter = function(name) {
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if (this.shared && this.parent.check(name, true)) return;
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return this.add(name, 'param');
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};
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Scope.prototype.check = function(name, immediate) {
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var found, _ref2;
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found = !!this.type(name);
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if (found || immediate) return found;
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return !!((_ref2 = this.parent) != null ? _ref2.check(name) : void 0);
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};
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Scope.prototype.temporary = function(name, index) {
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if (name.length > 1) {
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return '_' + name + (index > 1 ? index : '');
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} else {
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return '_' + (index + parseInt(name, 36)).toString(36).replace(/\d/g, 'a');
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}
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};
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Scope.prototype.type = function(name) {
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var v, _i, _len, _ref2;
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_ref2 = this.variables;
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for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
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v = _ref2[_i];
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if (v.name === name) return v.type;
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}
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return null;
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};
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Scope.prototype.freeVariable = function(type) {
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var index, temp;
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index = 0;
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while (this.check((temp = this.temporary(type, index)))) {
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index++;
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}
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this.add(temp, 'var', true);
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return temp;
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};
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Scope.prototype.assign = function(name, value) {
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this.add(name, {
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value: value,
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assigned: true
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}, true);
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return this.hasAssignments = true;
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};
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Scope.prototype.hasDeclarations = function() {
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return !!this.declaredVariables().length;
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};
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Scope.prototype.declaredVariables = function() {
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var realVars, tempVars, v, _i, _len, _ref2;
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realVars = [];
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tempVars = [];
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_ref2 = this.variables;
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for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
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v = _ref2[_i];
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if (v.type === 'var') {
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(v.name.charAt(0) === '_' ? tempVars : realVars).push(v.name);
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}
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}
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return realVars.sort().concat(tempVars.sort());
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};
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Scope.prototype.assignedVariables = function() {
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var v, _i, _len, _ref2, _results;
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_ref2 = this.variables;
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_results = [];
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for (_i = 0, _len = _ref2.length; _i < _len; _i++) {
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v = _ref2[_i];
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if (v.type.assigned) _results.push("" + v.name + " = " + v.type.value);
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}
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return _results;
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};
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return Scope;
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})();
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}).call(this);
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