Primary Type Syntax

[Bolpat]

In the grammar, I use ? to signify optional occurrence.

    FunctionLiteral:
-       function RefOrAutoRef? Type? ParameterWithAttributes? FunctionLiteralBody
-       delegate RefOrAutoRef? Type? ParameterWithMemberAttributes? FunctionLiteralBody
+       function LinkageAttribute? RefOrAutoRef? Type? ParameterWithAttributes? FunctionLiteralBody
+       delegate LinkageAttribute? RefOrAutoRef? Type? ParameterWithMemberAttributes? FunctionLiteralBody

    Type:
        TypeCtors? BasicType TypeSuffixes?
+       TypeCtors? ref TypeCtors? BasicType TypeSuffixes
+       TypeCtors? LinkageAttribute ref? TypeCtors? BasicType TypeSuffixes

    BasicType:
        FundamentalType
        . QualifiedIdentifier
        QualifiedIdentifier
        Typeof
        Typeof . QualifiedIdentifier
-       TypeCtor ( Type )
+       TypeCtor? ( Type )
        Vector
        TraitsExpression
        MixinType

    TypeSuffixes:
        TypeSuffix TypeSuffixes?

    TypeSuffix:
        *
        [ ]
        [ AssignExpression ]
        [ AssignExpression .. AssignExpression ]
        [ Type ]
        delegate Parameters MemberFunctionAttributes?
        function Parameters FunctionAttributes?

    Parameter:
        ParameterDeclaration
        ParameterDeclaration ...
        ParameterDeclaration = AssignExpression

    ParameterDeclaration:
        ParameterAttributes? BasicType Declarator
+       ParameterAttributes? LinkageAttribute ref? TypeCtors? BasicType Declarator
        ParameterAttributes? Type

    Declarator: 
        TypeSuffixes? Identifier

(After renaming the branch, this is the same as #3446.)

[dlang-bot]

Thanks for your pull request and interest in making D better, @Bolpat! We are looking forward to reviewing it, and you should be hearing from a maintainer soon.
Please verify that your PR follows this checklist:

• My PR is fully covered with tests (you can see the coverage diff by visiting the details link of the codecov check)
• My PR is as minimal as possible (smaller, focused PRs are easier to review than big ones)
• I have provided a detailed rationale explaining my changes
• New or modified functions have Ddoc comments (with Params: and Returns:)

Please see CONTRIBUTING.md for more information.

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[dukc]

These two changes seem a bit unrelated to me, but they're small enough that I don't think demanding two separate PRs would be a good idea. And I think both of the changes are themselves correct.