From 7349dc5cff49cf22c82eb912813e47f30cd7a757 Mon Sep 17 00:00:00 2001 From: Julius Ikkala Date: Sat, 28 Jun 2025 05:39:24 +0300 Subject: Minimal optional constraints (#7422) * Parse optional witness syntax * Allow failing optional constraint * Make `is` work with optional constraint * Allow using optional constraint in checked if statements * Fix tests * Make it work with structs * Fix MSVC build error * Disallow using `as` with optional constraints * Update test to match split is/as errors * Add tests * Fix uninitialized variables in tests * Add tests of incorrect uses & fix related bugs * Mention optional constraints in docs * format code * Fix type unification with NoneWitness * Fix formatting --------- Co-authored-by: slangbot <186143334+slangbot@users.noreply.github.com> Co-authored-by: Nathan V. Morrical --- source/slang/slang-ast-val.cpp | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'source/slang/slang-ast-val.cpp') diff --git a/source/slang/slang-ast-val.cpp b/source/slang/slang-ast-val.cpp index 40daae3a6..0e942fe39 100644 --- a/source/slang/slang-ast-val.cpp +++ b/source/slang/slang-ast-val.cpp @@ -896,6 +896,18 @@ Val* TypeCoercionWitness::_resolveImplOverride() return this; } +// !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! NoneWitness !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! + +void NoneWitness::_toTextOverride(StringBuilder& out) +{ + out.append("none"); +} + +Val* NoneWitness::_resolveImplOverride() +{ + return this; +} + // UNormModifierVal void UNormModifierVal::_toTextOverride(StringBuilder& out) -- cgit v1.2.3