134 lines
4.1 KiB
JavaScript
134 lines
4.1 KiB
JavaScript
(function() {
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var Scope, _ref, extend, last;
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var __hasProp = Object.prototype.hasOwnProperty;
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_ref = require('./helpers'), extend = _ref.extend, last = _ref.last;
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exports.Scope = (function() {
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Scope = (function() {
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return function Scope(_arg, _arg2, _arg3) {
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this.method = _arg3;
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this.expressions = _arg2;
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this.parent = _arg;
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this.variables = {
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'arguments': 'arguments'
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};
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if (this.parent) {
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this.garbage = this.parent.garbage;
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} else {
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this.garbage = [];
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Scope.root = this;
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}
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return this;
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};
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})();
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Scope.root = null;
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Scope.prototype.startLevel = function() {
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return this.garbage.push([]);
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};
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Scope.prototype.endLevel = function() {
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var _i, _len, _ref2, _result, name, vars;
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vars = this.variables;
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_result = [];
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for (_i = 0, _len = (_ref2 = this.garbage.pop()).length; _i < _len; _i++) {
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name = _ref2[_i];
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if (vars[name] === 'var') {
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_result.push(vars[name] = 'reuse');
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}
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}
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return _result;
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};
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Scope.prototype.find = function(name, options) {
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if (this.check(name, options)) {
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return true;
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}
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this.variables[name] = 'var';
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return false;
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};
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Scope.prototype.any = function(fn) {
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var _ref2, k, v;
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for (v in _ref2 = this.variables) {
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if (!__hasProp.call(_ref2, v)) continue;
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k = _ref2[v];
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if (fn(v, k)) {
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return true;
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}
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}
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return false;
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};
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Scope.prototype.parameter = function(name) {
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return (this.variables[name] = 'param');
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};
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Scope.prototype.check = function(name, options) {
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var _ref2, immediate;
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immediate = Object.prototype.hasOwnProperty.call(this.variables, name);
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if (immediate || ((options != null) ? options.immediate : undefined)) {
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return immediate;
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}
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return !!(((_ref2 = this.parent) != null) ? _ref2.check(name) : undefined);
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};
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Scope.prototype.temporary = function(type, index) {
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return type.length > 1 ? '_' + type + (index > 1 ? index : '') : '_' + (index + parseInt(type, 36)).toString(36).replace(/\d/g, 'a');
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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)) && this.variables[temp] !== 'reuse') {
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index++;
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}
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this.variables[temp] = 'var';
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if (this.garbage.length) {
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last(this.garbage).push(temp);
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}
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return temp;
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};
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Scope.prototype.assign = function(name, value) {
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return (this.variables[name] = {
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value: value,
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assigned: true
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});
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};
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Scope.prototype.hasDeclarations = function(body) {
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return body === this.expressions && this.any(function(k, val) {
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return ('var' === val || 'reuse' === val);
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});
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};
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Scope.prototype.hasAssignments = function(body) {
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return body === this.expressions && this.any(function(k, val) {
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return val.assigned;
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});
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};
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Scope.prototype.declaredVariables = function() {
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var _ref2, _result, key, val;
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return (function() {
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_result = [];
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for (key in _ref2 = this.variables) {
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if (!__hasProp.call(_ref2, key)) continue;
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val = _ref2[key];
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if (('var' === val || 'reuse' === val)) {
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_result.push(key);
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}
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}
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return _result;
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}).call(this).sort();
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};
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Scope.prototype.assignedVariables = function() {
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var _ref2, _result, key, val;
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_result = [];
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for (key in _ref2 = this.variables) {
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if (!__hasProp.call(_ref2, key)) continue;
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val = _ref2[key];
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if (val.assigned) {
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_result.push("" + key + " = " + (val.value));
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}
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}
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return _result;
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};
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Scope.prototype.compiledDeclarations = function() {
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return this.declaredVariables().join(', ');
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};
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Scope.prototype.compiledAssignments = function() {
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return this.assignedVariables().join(', ');
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};
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return Scope;
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}).call(this);
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}).call(this);
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