Await not parsed in esprima 4.0.1

Question

Can't get the esprima 4.0.1 parser to work with 'await'. Having difficult times to find the relevant options that can be passed into the parse function for 'await', if that is possible.

Steps to reproduce

const esprima = require('esprima');
esprima.parse("await function_call()")

Expected output

Describing the code structure containing the await call

Actual output

Error: Line 1: Unexpected identifier

Just checked, Esprima 4.0.1 is perfectly happy to parse `await` in the correct context. (`await function_call()` is a syntax error outside of an `async` function -- not just in Esprima, but per spec.) — T.J. Crowder, Oct 19 '18 at 15:58
Assumed that eprima can parse a partial without knowing the async context. Of course it can't. — Stan Wiechers, Oct 19 '18 at 17:07

score 3 · Accepted Answer · answered Oct 19 '18 at 15:52

3

Your code is a SyntaxError. await is only a keyword inside async functions:

 esprima.parse("(async function() {await function_call()})()")

answered Oct 19 '18 at 15:52

Jonas Wilms

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Of course! The parser can't assume there is an async around it. – Stan Wiechers Oct 19 '18 at 17:04

Await not parsed in esprima 4.0.1

Steps to reproduce

Expected output

Actual output

1 Answers1