Aling `nd_range` with SYCL 2020

[KornevNikita]

Describe the bug

All functions are missing noexcept:

  __SYCL2020_DEPRECATED("offsets are deprecated in SYCL2020")
  nd_range(range<Dimensions> globalSize, range<Dimensions> localSize,
           id<Dimensions> offset)
      : globalSize(globalSize), localSize(localSize), offset(offset) {}

  nd_range(range<Dimensions> globalSize, range<Dimensions> localSize)
      : globalSize(globalSize), localSize(localSize), offset(id<Dimensions>()) {
  }

  range<Dimensions> get_global_range() const { return globalSize; }

  range<Dimensions> get_local_range() const { return localSize; }

  range<Dimensions> get_group_range() const { return globalSize / localSize; }

Operators == and != should be implemented as hidden friends, see e.g. https://github.com/intel/llvm/blob/sycl/sycl/include/sycl/queue.hpp#L385

All changes should be guarded to avoid breaking ABI:

#ifndef __INTEL_PREVIEW_BREAKING_CHANGES
size_t func() const {
#else
size_t func() const noexcept {
#endif // __INTEL_PREVIEW_BREAKING_CHANGES

To reproduce

1. Include a code snippet that is as short as possible
2. Specify the command which should be used to compile the program
3. Specify the command which should be used to launch the program
4. Indicate what is wrong and what was expected

Environment

• OS: [e.g Windows/Linux]
• Target device and vendor: [e.g. Intel GPU]
• DPC++ version: [e.g. commit hash or output of clang++ --version]
• Dependencies version: [e.g. the output of sycl-ls --verbose]

Additional context

No response

[Robertkq]

@KornevNikita I'd like to work on this, I'm looking at this docs: https://github.khronos.org/SYCL_Reference/iface/nd_range.html

I can't see noexcept in the function signatures from specifications, also in the specifications of Common By-value Semantics there is no mention of in general of noexcept. Am I reading the wrong docs, or is this noexcept an implementation detail as opposed to alignment with specification?

EDIT: Found the correct docs: https://registry.khronos.org/SYCL/specs/sycl-2020/html/sycl-2020.html#subsubsec:nd-range-class

I somehow thought that the previous documentation link would be more up to date than the one on the registry..

[KornevNikita]

EDIT: Found the correct docs: https://registry.khronos.org/SYCL/specs/sycl-2020/html/sycl-2020.html#subsubsec:nd-range-class

Actually this version is 8+ months old, so it can also contain some outdated stuff. The best way is to check the source code:
https://github.com/KhronosGroup/SYCL-Docs/blob/d53db7cb82596e9e0ddb1efc47547d3589d84d75/adoc/headers/ndRange.h#L12-L18