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Fix: Handling of opaque methods in traits overriding check (dafny-lan…
…g#4207) This PR fixes dafny-lang#4205 I added the corresponding test. <small>By submitting this pull request, I confirm that my contribution is made under the terms of the [MIT license](https://github.com/dafny-lang/dafny/blob/master/LICENSE.txt).</small>
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,12 @@ | ||
// RUN: %baredafny verify %args "%s" > "%t" | ||
// RUN: %diff "%s.expect" "%t" | ||
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trait T { | ||
opaque function bar(): int | ||
} | ||
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class F extends T { | ||
opaque function bar(): int { | ||
1 | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,2 @@ | ||
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Dafny program verifier finished with 1 verified, 0 errors |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,13 @@ | ||
// RUN: %baredafny verify %args "%s" > "%t" | ||
// RUN: %diff "%s.expect" "%t" | ||
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trait T { | ||
opaque function bar(): (r: int) | ||
} | ||
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class F extends T { | ||
constructor() {} | ||
opaque function bar(): (r: int) { | ||
1 | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,2 @@ | ||
|
||
Dafny program verifier finished with 1 verified, 0 errors |
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1 @@ | ||
Traits with opaque functions can now be extended without errors |