Warn on float-to-double coercion for arguments. (#2802)

* Warn on float-to-double coercion for arguments.

* Fix test.

* Rename.

* Fixup.

---------

Co-authored-by: Yong He <yhe@nvidia.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/source/slang/slang-parser.cpp b/source/slang/slang-parser.cpp
index 45f4be477..555c79445 100644
--- a/source/slang/slang-parser.cpp
+++ b/source/slang/slang-parser.cpp
@@ -6560,14 +6560,19 @@ namespace Slang
     static NodeBase* parseImplicitConversionModifier(Parser* parser, void* /*userData*/)
     {
         ImplicitConversionModifier* modifier = parser->astBuilder->create<ImplicitConversionModifier>();
-
+        BuiltinConversionKind builtinKind = kBuiltinConversion_Unknown;
         ConversionCost cost = kConversionCost_Default;
         if( AdvanceIf(parser, TokenType::LParent) )
         {
             cost = ConversionCost(StringToInt(parser->ReadToken(TokenType::IntegerLiteral).getContent()));
+            if (AdvanceIf(parser, TokenType::Comma))
+            {
+                builtinKind = BuiltinConversionKind(StringToInt(parser->ReadToken(TokenType::IntegerLiteral).getContent()));
+            }
             parser->ReadToken(TokenType::RParent);
         }
         modifier->cost = cost;
+        modifier->builtinConversionKind = builtinKind;
         return modifier;
     }