WIP: ASTBuilder (#1358)

* Compiles.

* Small tidy up around session/ASTBuilder.

* Tests are now passing.

* Fix Visual Studio project.

* Fix using new X to use builder when protectedness of Ctor is not enough.
Substitute->substitute

* Add some missing ast nodes created outside of ASTBuilder.

* Compile time check that ASTBuilder is making an AST type.

* Moced findClasInfo and findSyntaxClass (essentially the same thing) to SharedASTBuilder from Session.

1 files changed, 14 insertions, 19 deletions

diff --git a/source/slang/slang-check-type.cpp b/source/slang/slang-check-type.cpp
index e6c924be8..db5d555cd 100644
--- a/source/slang/slang-check-type.cpp
+++ b/source/slang/slang-check-type.cpp
@@ -37,7 +37,7 @@ namespace Slang
         {
             return typeType->type;
         }
-        return getSession()->getErrorType();
+        return m_astBuilder->getErrorType();
     }
 
     RefPtr<Type> SemanticsVisitor::TranslateTypeNode(const RefPtr<Expr> & node)
@@ -97,7 +97,7 @@ namespace Slang
         {
             return typeType->type;
         }
-        return getSession()->getErrorType();
+        return m_astBuilder->getErrorType();
     }
 
     RefPtr<Type> SemanticsVisitor::ExtractGenericArgType(RefPtr<Expr> exp)
@@ -114,7 +114,7 @@ namespace Slang
         // constant expression in context, then we will instead construct
         // a dummy "error" value to represent the result.
         //
-        val = new ErrorIntVal();
+        val = m_astBuilder->create<ErrorIntVal>();
         return val;
     }
 
@@ -149,7 +149,7 @@ namespace Slang
         DeclRef<GenericDecl>        genericDeclRef,
         List<RefPtr<Expr>> const&   args)
     {
-        RefPtr<GenericSubstitution> subst = new GenericSubstitution();
+        RefPtr<GenericSubstitution> subst = m_astBuilder->create<GenericSubstitution>();
         subst->genericDecl = genericDeclRef.getDecl();
         subst->outer = genericDeclRef.substitutions.substitutions;
 
@@ -162,9 +162,7 @@ namespace Slang
         innerDeclRef.decl = GetInner(genericDeclRef);
         innerDeclRef.substitutions = SubstitutionSet(subst);
 
-        return DeclRefType::Create(
-            getSession(),
-            innerDeclRef);
+        return DeclRefType::create(m_astBuilder, innerDeclRef);
     }
 
     bool SemanticsVisitor::CoerceToProperTypeImpl(
@@ -216,7 +214,7 @@ namespace Slang
                         if (diagSink)
                         {
                             diagSink->diagnose(typeExp.exp.Ptr(), Diagnostics::genericTypeNeedsArgs, typeExp);
-                            *outProperType = getSession()->getErrorType();
+                            *outProperType = m_astBuilder->getErrorType();
                         }
                         return false;
                     }
@@ -232,7 +230,7 @@ namespace Slang
                         if (diagSink)
                         {
                             diagSink->diagnose(typeExp.exp.Ptr(), Diagnostics::unimplemented, "can't fill in default for generic type parameter");
-                            *outProperType = getSession()->getErrorType();
+                            *outProperType = m_astBuilder->getErrorType();
                         }
                         return false;
                     }
@@ -293,7 +291,7 @@ namespace Slang
             {
                 // TODO(tfoley): pick the right diagnostic message
                 getSink()->diagnose(result.exp.Ptr(), Diagnostics::invalidTypeVoid);
-                result.type = getSession()->getErrorType();
+                result.type = m_astBuilder->getErrorType();
                 return result;
             }
         }
@@ -334,21 +332,18 @@ namespace Slang
         RefPtr<Type>  elementType,
         RefPtr<IntVal>          elementCount)
     {
-        auto session = getSession();
-        auto vectorGenericDecl = findMagicDecl(
-            session, "Vector").as<GenericDecl>();
+        auto vectorGenericDecl = m_astBuilder->getSharedASTBuilder()->findMagicDecl("Vector").as<GenericDecl>();
+            
         auto vectorTypeDecl = vectorGenericDecl->inner;
 
-        auto substitutions = new GenericSubstitution();
+        auto substitutions = m_astBuilder->create<GenericSubstitution>();
         substitutions->genericDecl = vectorGenericDecl.Ptr();
         substitutions->args.add(elementType);
         substitutions->args.add(elementCount);
 
         auto declRef = DeclRef<Decl>(vectorTypeDecl.Ptr(), substitutions);
 
-        return DeclRefType::Create(
-            session,
-            declRef).as<VectorExpressionType>();
+        return DeclRefType::create(m_astBuilder, declRef).as<VectorExpressionType>();
     }
 
     RefPtr<Expr> SemanticsExprVisitor::visitSharedTypeExpr(SharedTypeExpr* expr)
@@ -366,8 +361,8 @@ namespace Slang
         // We have an expression of the form `__TaggedUnion(A, B, ...)`
         // which will evaluate to a tagged-union type over `A`, `B`, etc.
         //
-        RefPtr<TaggedUnionType> type = new TaggedUnionType();
-        expr->type = QualType(getTypeType(type));
+        RefPtr<TaggedUnionType> type = m_astBuilder->create<TaggedUnionType>();
+        expr->type = QualType(m_astBuilder->getTypeType(type));
 
         for( auto& caseTypeExpr : expr->caseTypes )
         {