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Description: use latest ecmaVersion
Acorn 8.0.0 introduced ecmaScript 'latest'
to be as relaxed as possible,
and at the same time made defining ecmaScript mandatory.
.
This patch declares ecmaScript at both places it is used
to avoid warning when upgrading to acon 8,
and while at it switches to this new 'latest'.
.
Also, corresponding closure-compiler option is updated.
.
See also <https://github.com/emscripten-core/emscripten/issues/11303#issuecomment-698673424>
Author: Jonas Smedegaard <dr@jones.dk>
Last-Update: 2020-11-04
---
This patch header follows DEP-3: http://dep.debian.net/deps/dep3/
--- a/tools/acorn-optimizer.js
+++ b/tools/acorn-optimizer.js
@@ -933,7 +933,7 @@
// Need a parser to pass to acorn.Node constructor.
// Create it once and reuse it.
-var stubParser = new acorn.Parser();
+var stubParser = new acorn.Parser({ecmaVersion: 'latest'});
function createNode(props) {
var node = new acorn.Node(stubParser);
@@ -1416,7 +1416,7 @@
try {
ast = acorn.parse(input, {
// Keep in sync with --language_in that we pass to closure in building.py
- ecmaVersion: 2020,
+ ecmaVersion: 'latest',
preserveParens: closureFriendly,
onComment: closureFriendly ? sourceComments : undefined
});
--- a/tools/building.py
+++ b/tools/building.py
@@ -1003,7 +1003,7 @@
args = ['--compilation_level', 'ADVANCED_OPTIMIZATIONS' if advanced else 'SIMPLE_OPTIMIZATIONS']
# Keep in sync with ecmaVersion in tools/acorn-optimizer.js
- args += ['--language_in', 'ECMASCRIPT_2020']
+ args += ['--language_in', 'ECMASCRIPT_NEXT_IN']
# Tell closure not to do any transpiling or inject any polyfills.
# At some point we may want to look into using this as way to convert to ES5 but
# babel is perhaps a better tool for that.
|
