[PATCH] D67563: Debug Info: Add support for named constants

[David Blaikie via Phabricator via llvm-commits]

dblaikie added a comment.

In D67563#1670224 <https://reviews.llvm.org/D67563#1670224>, @aprantl wrote:

> In D67563#1670183 <https://reviews.llvm.org/D67563#1670183>, @dblaikie wrote:
>
> > Out of curiosity does swift have const in the type system like C and C++? (I guess so) - and what would be the difference between a normal (non-let) variable of a const type, versus a let variable of a non-const type?
>
>
> Swift does not have const in the type system. There are no real pointers in the language; the closest equivalent are probably constant struct members, such as:
>
>   struct MyStruct {
>     let i_am_a_constant : Int = 42
>     var i_am_mutable : String
>   }
>


Would seem to me (with an obvious C++ bias in my view of the world) that it maps best to i_am_a_constant being a DW_TAG_variable (or function_parameter) with a DW_TAG_const_type  that has a base type of "Int" (however that's represented).

But I realize that might not be a good fit for Swift/its debuggers, etc, and certainly tend to leave this up to whatever you folks want to do with your language. Just my 2c :)


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