Reason: Better syntax error for `return foo`

[chenglou]

Something like "return doesn't exist in Reason; blabla"

[strega-nil]

What if someone names a function return, as with monads (although that's a terrible name, it's still used)

[bsansouci]

We could make it a hint, like we’ve done in the past. The hints are 100% accurate but they help give some idea of what caused the problem. Like “did you miss a semicolon” etc

[chenglou]

return foo is invalid syntax, not a function

[mrkaspa]

Reason does not need something like this :/

[chenglou]

Folks, please read the title. It's to provide better syntax error message when people attempt to do return foo, which is invalid in reason. Right now the error message is <UNKNOWN SYNTAX ERROR>