Do not print errors in _coerce when "JustTrying". (#7064)

* Do not print errors in _coerce when "JustTrying".

While figuring out which generic-overload works best, `_coerce()` is
printing errors and Slang compilation terminates prematurely.

When `TryCheckGenericOverloadCandidateTypes()` is calling `_coerce()` in
"JustTrying" mode, the error messages should be snoozed.

The following logic shows the intention of how to silence the error
messages, but the chain of `sink` was broken in the middle and
`_coerce()` was using `getSink()` from the SemanticVisitor.

 val = ExtractGenericArgInteger(
   arg,
   getType(m_astBuilder, valParamRef),
   context.mode == OverloadResolveContext::Mode::JustTrying ? nullptr : getSink());

* Use tempSink when available.

1 files changed, 8 insertions, 7 deletions

diff --git a/source/slang/slang-check-decl.cpp b/source/slang/slang-check-decl.cpp
index c2c0c2cb6..bdd59c2c5 100644
--- a/source/slang/slang-check-decl.cpp
+++ b/source/slang/slang-check-decl.cpp
@@ -1868,7 +1868,8 @@ void SemanticsDeclHeaderVisitor::checkVarDeclCommon(VarDeclBase* varDecl)
             if (auto initExpr = varDecl->initExpr)
             {
                 initExpr = CheckTerm(initExpr);
-                initExpr = coerce(CoercionSite::Initializer, varDecl->type.Ptr(), initExpr);
+                initExpr =
+                    coerce(CoercionSite::Initializer, varDecl->type.Ptr(), initExpr, getSink());
                 varDecl->initExpr = initExpr;
 
                 maybeInferArraySizeForVariable(varDecl);
@@ -2348,7 +2349,7 @@ void SemanticsDeclBodyVisitor::checkVarDeclCommon(VarDeclBase* varDecl)
         if (initExpr->type.isWriteOnly)
             getSink()->diagnose(initExpr, Diagnostics::readingFromWriteOnly);
 
-        initExpr = coerce(CoercionSite::Initializer, varDecl->type.Ptr(), initExpr);
+        initExpr = coerce(CoercionSite::Initializer, varDecl->type.Ptr(), initExpr, getSink());
         varDecl->initExpr = initExpr;
 
         // We need to ensure that any variable doesn't introduce
@@ -4948,7 +4949,7 @@ bool SemanticsVisitor::trySynthesizeMethodRequirementWitness(
     // so we also need to coerce the result of the call to
     // the expected type.
     //
-    auto coercedCall = subVisitor.coerce(CoercionSite::Return, resultType, checkedCall);
+    auto coercedCall = subVisitor.coerce(CoercionSite::Return, resultType, checkedCall, getSink());
 
     // If our overload resolution or type coercion failed,
     // then we have not been able to synthesize a witness
@@ -5803,7 +5804,7 @@ bool SemanticsVisitor::synthesizeAccessorRequirements(
             // the expected type of the property.
             //
             auto coercedMemberRef =
-                subVisitor.coerce(CoercionSite::Return, resultType, synBoundStorageExpr);
+                subVisitor.coerce(CoercionSite::Return, resultType, synBoundStorageExpr, getSink());
             auto synReturn = m_astBuilder->create<ReturnStmt>();
             synReturn->expression = coercedMemberRef;
 
@@ -8092,7 +8093,7 @@ void SemanticsDeclBodyVisitor::visitEnumCaseDecl(EnumCaseDecl* decl)
     if (auto initExpr = decl->tagExpr)
     {
         initExpr = CheckTerm(initExpr);
-        initExpr = coerce(CoercionSite::General, tagType, initExpr);
+        initExpr = coerce(CoercionSite::General, tagType, initExpr, getSink());
 
         // We want to enforce that this is an integer constant
         // expression.
@@ -9139,7 +9140,7 @@ void SemanticsDeclBodyVisitor::visitParamDecl(ParamDecl* paramDecl)
         // actual type of the parameter.
         //
         initExpr = CheckTerm(initExpr);
-        initExpr = coerce(CoercionSite::Initializer, typeExpr.type, initExpr);
+        initExpr = coerce(CoercionSite::Initializer, typeExpr.type, initExpr, getSink());
         paramDecl->initExpr = initExpr;
 
         // TODO: a default argument expression needs to
@@ -9284,7 +9285,7 @@ void SemanticsDeclBodyVisitor::synthesizeCtorBodyForBases(
         invoke->arguments.addRange(argumentList);
 
         auto assign = m_astBuilder->create<AssignExpr>();
-        assign->left = coerce(CoercionSite::Initializer, declRefType, thisExpr);
+        assign->left = coerce(CoercionSite::Initializer, declRefType, thisExpr, getSink());
         assign->right = invoke;
 
         auto stmt = m_astBuilder->create<ExpressionStmt>();