[chippiewill]

It's to remove a syntax ambiguity with c-style function declarations https://en.wikipedia.org/wiki/Most_vexing_parse

The syntax ambiguity adds a lot of complexity to the grammar that makes parsing a lot more complicated than it needs to be.

Sticking `fn` in front fixes a lot of problems.

[maybewhenthesun]

tnx for the clear explanation