externref-macro 0.2.0

Proc macro for `externref`
Documentation 
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error: exported function must be marked with `extern "C"`
 --> tests/ui/item_without_abi.rs:4:5
  |
4 | pub fn test() {
  |     ^^^^^^^^^

error: foreign module must be marked with `extern "C"`
 --> tests/ui/item_without_abi.rs:9:1
  |
9 | extern {
  | ^^^^^^