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February 10, 2019 20:46
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F# compiler bug: attributes on type aliases are silently ignored.
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| open System | |
| [<AttributeUsage(AttributeTargets.Class)>] | |
| type DocAttribute (text: string) = | |
| inherit Attribute() | |
| member x.Text = text | |
| [<Doc "Attribute on Test">] | |
| type Test = { | |
| i: int | |
| } | |
| // this should cause an error. | |
| // | |
| // https://github.com/Microsoft/visualfsharp/blob/f1558b7f24c7e6bbf284c428dbf9ec41bda877e1/src/fsharp/pars.fsy#L2037 | |
| // type Test' = [<Doc "Attribute on Test prime">] Test | |
| [<Doc "Attribute on Test prime">] | |
| type Test' = Test | |
| module Check = | |
| let docTextOnTestPrime = | |
| let t = typeof<Test'> | |
| let attrs = t.GetCustomAttributes(typeof<DocAttribute>, false) | |
| (attrs.[0] :?> DocAttribute).Text | |
| // https://github.com/Microsoft/visualfsharp/blob/master/src/fsharp/pars.fsy#L1439 (type def) | |
| // https://github.com/Microsoft/visualfsharp/blob/master/src/fsharp/pars.fsy#L1444 | |
| // http://ratatosk.dynu.net/ast/#?code=PYBwpgdgBAygngZwC5gLYCh0G0A8BBJJAJwEsAjAVxQFUEBDAczAAoDjyqwAVOoppBADoAwgBs6CBAEoAfAF10SOOCgARYAGM2pSiijMUADyQAuKMlIQGUqAF50UR1BIQAFmFJIo2jimZSHJ1Q0Mg8oQ0EuMGM7KCMkTFx1DSgAIh9dMChgaCjkVPlFZSy8r1soAG9AxxIzFwSAX0wAema41xIEc1dgClEAEygNOgoELLpoDyJgIkF0Vvm210IQBBNWhhIkVwoyQQ1gVGaAWRINaYRgADMkZoA3Too6USuEV14QZrJRYDJmq4AjABWIEADjIAHYrgAmAAsGghYAAbGQyDDQfDYdDQf00QBOMAaWEAsj9OigiGIgHNBBEDT-N4fZogXhCV5wADEABloQAGADMEMWcWKUFKAHJYklNGkMpxsrkwMgoCBSMECnIxUqEtgcMlZYQdPKclrlaqSOrCkoVBLYqVEnqZelDb4sibSiq1WANUUbdrxZLyhUoP0KKhUHA6hAvE0gA |
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