Incorrect parenthesization of arrow functions

[Conduitry]

cr.print(cr.x`foo || (bar => bar)`).code

results in

foo || bar => bar

which is syntactically incorrect. The arrow function needs to be wrapped in parentheses. I'm not sure what precedence rules are in play here or what needs changing.

Ref sveltejs/svelte#4384

[Conduitry]

Aside:

cr.print(cr.x`foo || bar => bar`).code

results in

foo || bar

for some reason. I guess Acorn silently stops parsing when it sees the invalid =>? I'm not sure whether that should be considered a bug.

[Rich-Harris]

Yeah, Acorn just ignores anything past the first valid expression. Definitely a bug for our situation

[Rich-Harris]

fixed in 0.1.1