160 lines
4.5 KiB
JavaScript
160 lines
4.5 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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function Scope(_arg, _arg2, _arg3) {
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this.parent = _arg;
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this.expressions = _arg2;
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this.method = _arg3;
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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) {
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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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}
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Scope.root = null;
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Scope.prototype.add = function(name, type) {
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var pos;
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if (typeof (pos = this.positions[name]) === 'number') {
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return this.variables[pos].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.startLevel = function() {
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this.garbage.push([]);
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return this;
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};
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Scope.prototype.endLevel = function() {
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var name, _i, _len, _ref;
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_ref = this.garbage.pop();
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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name = _ref[_i];
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if (this.type(name) === 'var') {
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this.add(name, 'reuse');
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}
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}
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return this;
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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.add(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 v, _i, _len, _ref;
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_ref = this.variables;
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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v = _ref[_i];
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if (fn(v)) {
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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.add(name, 'param');
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};
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Scope.prototype.check = function(name, immediate) {
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var found, _ref;
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found = !!this.type(name);
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if (found || immediate) {
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return found;
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}
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return !!((_ref = this.parent) != null ? _ref.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, _ref;
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_ref = this.variables;
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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v = _ref[_i];
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if (v.name === name) {
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return v.type;
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}
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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, _ref;
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index = 0;
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while (this.check((temp = this.temporary(type, index)), true) && this.type(temp) !== 'reuse') {
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index++;
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}
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this.add(temp, 'var');
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if ((_ref = last(this.garbage)) != null) {
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_ref.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.add(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(v) {
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var _ref;
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return (_ref = v.type) === 'var' || _ref === 'reuse';
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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(v) {
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return v.type.assigned;
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});
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};
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Scope.prototype.declaredVariables = function() {
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var tmp, usr, v, _i, _len, _ref, _ref2;
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usr = [];
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tmp = [];
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_ref = this.variables;
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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v = _ref[_i];
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if ((_ref2 = v.type) === 'var' || _ref2 === 'reuse') {
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(v.name.charAt(0) === '_' ? tmp : usr).push(v.name);
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}
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}
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return usr.sort().concat(tmp.sort());
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};
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Scope.prototype.assignedVariables = function() {
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var v, _i, _len, _ref, _results;
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_ref = this.variables;
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_results = [];
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for (_i = 0, _len = _ref.length; _i < _len; _i++) {
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v = _ref[_i];
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if (v.type.assigned) {
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_results.push("" + v.name + " = " + v.type.value);
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}
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}
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return _results;
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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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}();
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}).call(this);
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