Skip to content

known-limitations.md

Latest commit

 

History

History
29 lines (20 loc) · 1.42 KB

known-limitations.md

File metadata and controls

29 lines (20 loc) · 1.42 KB

Known Limitations of Translation

This document tracks things that we know the translator can't handle, as well as things it probably won't ever handle.

Partially implemented, experimental

  • variadic function definitions and macros that operate on va_lists
  • preserving comments
  • long double type (Linux only)

Unimplemented

  • _Complex type (partially blocked by Rust language)
  • Using long double type in variadic functions (blocked on Rust language; see #154)
  • Non-x86/64 SIMD function/types and x86/64 SIMD function/types which have no Rust equivalent
  • Certain compiler builtins (see e.g. #88)
  • Exposing functions with different names and linkage types (blocked on Rust language. Example: https://github.com/ConradIrwin/libxml2/blob/master/elfgcchack.h)

Unimplemented, might be implementable

  • restrict pointers (Rust has references)
  • macros
  • GNU labels-as-values (#221)

Likely won't ever support

  • longjmp/setjmp: Although there are LLVM intrinsics for these, it is unclear how these interact with Rust (esp. idiomatic Rust).
  • jumps into and out of statement expressions: We support GNU C statement expressions, but we can not handle jumping into or out of these. Both entry and exit into the expression have to be through the usual fall-through evaluation of the expression.