Support async generator method introduced in ES2018
refs: https://tc39.github.io/proposal-async-iteration/
refs: https://tc39.github.io/proposal-async-iteration/#prod-AsyncGeneratorMethod
diff --git a/escodegen.js b/escodegen.js
index 3d864bb..9208803 100644
--- a/escodegen.js
+++ b/escodegen.js
@@ -868,13 +868,15 @@
}
function generateMethodPrefix(prop) {
- var func = prop.value;
+ var func = prop.value, prefix = '';
if (func.async) {
- return generateAsyncPrefix(func, !prop.computed);
- } else {
- // avoid space before method name
- return generateStarSuffix(func) ? '*' : '';
+ prefix += generateAsyncPrefix(func, !prop.computed);
}
+ if (func.generator) {
+ // avoid space before method name
+ prefix += generateStarSuffix(func) ? '*' : '';
+ }
+ return prefix;
}
CodeGenerator.prototype.generatePattern = function (node, precedence, flags) {
diff --git a/test/harmony.js b/test/harmony.js
index 0237b82..a57e484 100644
--- a/test/harmony.js
+++ b/test/harmony.js
@@ -6280,7 +6280,104 @@
}
}
+ },
+
+ 'ES2018 async generator method': {
+ 'class C {\n async *readLines(file) {\n while (!file.EOF) {\n yield await file.readLine();\n }\n }\n}': {
+ generateFrom: {
+ "type": "ClassDeclaration",
+ "id": {
+ "type": "Identifier",
+ "name": "C"
+ },
+ "superClass": null,
+ "body": {
+ "type": "ClassBody",
+ "body": [
+ {
+ "type": "MethodDefinition",
+ "key": {
+ "type": "Identifier",
+ "name": "readLines"
+ },
+ "value": {
+ "type": "FunctionExpression",
+ "id": null,
+ "params": [
+ {
+ "type": "Identifier",
+ "name": "file"
+ }
+ ],
+ "body": {
+ "type": "BlockStatement",
+ "body": [
+ {
+ "type": "WhileStatement",
+ "test": {
+ "type": "UnaryExpression",
+ "operator": "!",
+ "prefix": true,
+ "argument": {
+ "type": "MemberExpression",
+ "object": {
+ "type": "Identifier",
+ "name": "file"
+ },
+ "property": {
+ "type": "Identifier",
+ "name": "EOF"
+ },
+ "computed": false
+ }
+ },
+ "body": {
+ "type": "BlockStatement",
+ "body": [
+ {
+ "type": "ExpressionStatement",
+ "expression": {
+ "type": "YieldExpression",
+ "argument": {
+ "type": "AwaitExpression",
+ "argument": {
+ "type": "CallExpression",
+ "callee": {
+ "type": "MemberExpression",
+ "object": {
+ "type": "Identifier",
+ "name": "file"
+ },
+ "property": {
+ "type": "Identifier",
+ "name": "readLine"
+ },
+ "computed": false
+ },
+ "arguments": []
+ }
+ },
+ "delegate": false
+ }
+ }
+ ]
+ }
+ }
+ ]
+ },
+ "generator": true,
+ "async": true
+ },
+ "kind": "method",
+ "computed": false,
+ "static": false
+ }
+ ]
+ }
+ }
+ }
}
+
};
function updateDeeply(target, override) {
