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heavily simplify constants transformer

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This commit is contained in:
Sebastian McKenzie 2015-06-09 00:31:18 +01:00
parent 33128b0ccf
commit 2dd8c40618
1 changed files with 6 additions and 29 deletions
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35
src/babel/transformation/transformers/es6/constants.js
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@ -1,41 +1,18 @@
import * as messages from "../../../messages"; import * as messages from "../../../messages";
function checkPath(path, file) { export function Scope(node, parent, scope) {
var ids = path.getBindingIdentifiers(); for (var name in scope.bindings) {
var binding = scope.bindings[name];
for (var name in ids) {
var id = ids[name];
var binding = path.scope.getBinding(name);
// no binding exists
if (!binding) continue;
// not a constant // not a constant
if (binding.kind !== "const" && binding.kind !== "module") continue; if (binding.kind !== "const" && binding.kind !== "module") continue;
// check if the assignment id matches the constant declaration id for (var violation of (binding.constantViolations: Array)) {
// if it does then it was the id used to initially declare the throw violation.errorWithNode(messages.get("readOnly", name));
// constant so we can just ignore it }
if (binding.identifier === id) continue;
throw file.errorWithNode(id, messages.get("readOnly", name));
} }
} }
export function AssignmentExpression(node, parent, scope, file) {
checkPath(this, file);
}
export { AssignmentExpression as UpdateExpression };
export function VariableDeclaration(node) { export function VariableDeclaration(node) {
if (node.kind === "const") node.kind = "let"; if (node.kind === "const") node.kind = "let";
} }
export function ForXStatement(node, parent, scope, file) {
var left = this.get("left");
if (left.isIdentifier() || left.isPattern()) {
checkPath(left, file);
}
}