Bump diplomat-runtime from 0.15.1 to 0.16.0

[dependabot]

Bumps diplomat-runtime from 0.15.1 to 0.16.0.

Release notes

Sourced from diplomat-runtime's releases.

v0.16.0

Diplomat 0.16.0

syn v3

We've upgraded to syn v3 to stay up to date with newer minor releases of syn (rust-diplomat/diplomat#1228)

.NET backend

Diplomat used to have a .NET backend with the old AST representation. This was removed since we transitioned to the HIR representation, and existing users have been on an old fork of the AST-based backend. Thankfully, first-time contributor irvingoujAtDevolution has been hard at work implementing the new HIR-based .NET backend:

rust-diplomat/diplomat#1164 (co-authored with Claude Code), rust-diplomat/diplomat#1180, rust-diplomat/diplomat#1186, rust-diplomat/diplomat#1191, rust-diplomat/diplomat#1189, rust-diplomat/diplomat#1194, rust-diplomat/diplomat#1195, rust-diplomat/diplomat#1193 (co-authored with Claude Sonnet 4.6), rust-diplomat/diplomat#1201, rust-diplomat/diplomat#1216, rust-diplomat/diplomat#1214, rust-diplomat/diplomat#1213, rust-diplomat/diplomat#1215, rust-diplomat/diplomat#1226, rust-diplomat/diplomat#1225, rust-diplomat/diplomat#1230, rust-diplomat/diplomat#1231

File/Line information in AST Errors

Diplomat Core's MSRV is now 1.88, which enables support for procedural macro locations, which are used in new AST error reports. These new reports highlight line/file information instead of panicking with minimal context. There's a pretty printer that uses annotate-snippets (enabled by default in the tool, enabled elsewhere with the feature flag "pretty-print"), and an ugly printer (uses no extra dependencies, enabled by default in the macro).

This was accomplished in two steps: first, we added proc_macro2::Span information to AST. Subsequently, we made five PRs to replace existing panic!, .expect, and assert! calls in the AST parser with these more detailed reports:

rust-diplomat/diplomat#1172, rust-diplomat/diplomat#1177, rust-diplomat/diplomat#1183, rust-diplomat/diplomat#1206, rust-diplomat/diplomat#1208

Other New Features

Diplomat Core

• Added #[diplomat::include] for including macro definitions from other files (#917)
• Added support for partial comparisons (#1103)
• Added support for tuplable structs (#1101)
• Added Opaque slice support (#1088)

Diplomat Runtime

• Added no_std support for wasm32-unknown-unknown targets (First-time contribution by Brennan Kinney)

C++

• Added Clang/MSVC lifetime annotations

Nanobind

• Expanded default arguments support to Nanobind
• Added support for docstrings and stubgen (First-time contribution by twantonie)

Dart

• Added support for null-aware Dart syntax
• Updated backend to use RecordUse syntax (Contributed by mosuem)

Bugfixes

Diplomat Macro

• Force Result<Option, Err> return types to use DiplomatResult for easier use

Diplomat Tool

• Fixed CLI parsing of TOML config values

... (truncated)

Commits

• dbdd554 Bump Diplomat to 0.16.0 (#1232)
• 6a0526b Upgrade to syn v3 (#1228)
• aeea47a dotnet: ban problematic borrowed-span return paths (#1231)
• 7899245 dotnet: render HIR accessors as C# properties (#1230)
• 9c63ec3 dotnet: support both UTF-8 and UTF-16 strings, zero-copy (#1225)
• b0b4466 dotnet: fixed-width bool tag so Result/Option marshal on .NET Framework (#1226)
• aed887f Nanobind: Keep Lifetime Annotations for Read-Only Properties (#1227)
• 09273b4 dotnet: owned Box<[u8]> return via zero-copy RustVec (#1215)
• a6ce7f5 Update rust version to 1.88 (#1219)
• b06dbbc dotnet: rename generated DiplomatWriteable to DiplomatWrite (#1213)
• Additional commits viewable in compare view