aaac7fed
 liuqimichale
add
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"use strict";
exports.__esModule = true;
var _classCallCheck2 = require("babel-runtime/helpers/classCallCheck");
var _classCallCheck3 = _interopRequireDefault(_classCallCheck2);
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
var Binding = function () {
function Binding(_ref) {
var existing = _ref.existing,
identifier = _ref.identifier,
scope = _ref.scope,
path = _ref.path,
kind = _ref.kind;
(0, _classCallCheck3.default)(this, Binding);
this.identifier = identifier;
this.scope = scope;
this.path = path;
this.kind = kind;
this.constantViolations = [];
this.constant = true;
this.referencePaths = [];
this.referenced = false;
this.references = 0;
this.clearValue();
if (existing) {
this.constantViolations = [].concat(existing.path, existing.constantViolations, this.constantViolations);
}
}
Binding.prototype.deoptValue = function deoptValue() {
this.clearValue();
this.hasDeoptedValue = true;
};
Binding.prototype.setValue = function setValue(value) {
if (this.hasDeoptedValue) return;
this.hasValue = true;
this.value = value;
};
Binding.prototype.clearValue = function clearValue() {
this.hasDeoptedValue = false;
this.hasValue = false;
this.value = null;
};
Binding.prototype.reassign = function reassign(path) {
this.constant = false;
if (this.constantViolations.indexOf(path) !== -1) {
return;
}
this.constantViolations.push(path);
};
Binding.prototype.reference = function reference(path) {
if (this.referencePaths.indexOf(path) !== -1) {
return;
}
this.referenced = true;
this.references++;
this.referencePaths.push(path);
};
Binding.prototype.dereference = function dereference() {
this.references--;
this.referenced = !!this.references;
};
return Binding;
}();
exports.default = Binding;
module.exports = exports["default"];
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