Wrong behavior of {.hint[XDeclaredButNotUsed]: off.} if applied to definition

[yglukhov]

• If pragma is applied to symbol then XDeclaredButNotUsed hint is disabled for every symbol in module (at least thats what I observed). The following code doesn't produce any XDeclaredButNotUsed

proc p1 =
    var a {.hint[XDeclaredButNotUsed]: off.} : int
    var b: int # No XDeclaredButNotUsed message
proc p2 =
    var b : int # No XDeclaredButNotUsed message

• {.hint[XDeclaredButNotUsed]: off.} can be applied to vars, lets, consts, types, templates, but not to procs or macros.

template foo() {.hint[XDeclaredButNotUsed]: off.} = discard # OK!
proc bar() {.hint[XDeclaredButNotUsed]: off.} = discard # Error!

test.nim(2, 18) Error: identifier expected, but found 'hint[XDeclaredButNotUsed]'

Originated from #4641.

[stale]

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