dotnet/roslyn

Bad error message on const ref fields

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#17 125 ouverte le 14 févr. 2017

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Area-CompilersBugConcept-Diagnostic ClarityFeature - Ref Locals and Returnshelp wanted

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Description

Valid code:

static void Test(int x)
{
    ref int y = ref x;
}

Invalid code:

static void Test(int x)
{
    const ref int y = ref x;
}

Expected: an error message on const specifying that you cannot use ref and const modifiers together.

Found: parser fails with the following errors:

image

  1. CS1525 Invalid expression term 'ref'
  2. CS1002 ; expected
  3. CS1001 Identifier expected
  4. CS8172 Cannot initialize a by-reference variable with a value
  5. CS0118 'x' is a variable but is used like a type
  6. CS8174 A declaration of a by-reference variable must have an initializer

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