diff --git a/src/tint/resolver/builtin_structs.cc b/src/tint/resolver/builtin_structs.cc
index b817a578e3..4e45c16c32 100644
--- a/src/tint/resolver/builtin_structs.cc
+++ b/src/tint/resolver/builtin_structs.cc
@@ -45,7 +45,6 @@ type::Struct* BuildStruct(ProgramBuilder& b,
         offset = utils::RoundUp(align, offset);
         max_align = std::max(max_align, align);
         members.Push(b.create<type::StructMember>(
-            /* source */ Source{},
             /* name */ b.Sym(m.name),
             /* type */ m.type,
             /* index */ static_cast<uint32_t>(members.Length()),
@@ -58,7 +57,6 @@ type::Struct* BuildStruct(ProgramBuilder& b,
     uint32_t size_without_padding = offset;
     uint32_t size_with_padding = utils::RoundUp(max_align, offset);
     return b.create<type::Struct>(
-        /* source */ Source{},
         /* name */ b.Sym(name),
         /* members */ std::move(members),
         /* align */ max_align,
diff --git a/src/tint/resolver/inferred_type_test.cc b/src/tint/resolver/inferred_type_test.cc
index 2fb844605e..4545419ea2 100644
--- a/src/tint/resolver/inferred_type_test.cc
+++ b/src/tint/resolver/inferred_type_test.cc
@@ -150,12 +150,11 @@ TEST_F(ResolverInferredTypeTest, InferStruct_Pass) {
     auto* member = Member("x", ty.i32());
     auto* str = Structure("S", utils::Vector{member});
 
-    auto* expected_type =
-        create<sem::Struct>(str, str->source, str->name->symbol,
-                            utils::Vector{create<sem::StructMember>(
-                                member, member->source, member->name->symbol, create<type::I32>(),
-                                0u, 0u, 0u, 4u, type::StructMemberAttributes{})},
-                            0u, 4u, 4u);
+    auto* expected_type = create<sem::Struct>(
+        str, str->name->symbol,
+        utils::Vector{create<sem::StructMember>(member, member->name->symbol, create<type::I32>(),
+                                                0u, 0u, 0u, 4u, type::StructMemberAttributes{})},
+        0u, 4u, 4u);
 
     auto* ctor_expr = Call(ty.Of(str));
 
diff --git a/src/tint/resolver/resolver.cc b/src/tint/resolver/resolver.cc
index 3505f08a4e..de29692a0f 100644
--- a/src/tint/resolver/resolver.cc
+++ b/src/tint/resolver/resolver.cc
@@ -4189,9 +4189,9 @@ sem::Struct* Resolver::Structure(const ast::Struct* str) {
         }
 
         auto* sem_member = builder_->create<sem::StructMember>(
-            member, member->source, member->name->symbol, type,
-            static_cast<uint32_t>(sem_members.Length()), static_cast<uint32_t>(offset),
-            static_cast<uint32_t>(align), static_cast<uint32_t>(size), attributes);
+            member, member->name->symbol, type, static_cast<uint32_t>(sem_members.Length()),
+            static_cast<uint32_t>(offset), static_cast<uint32_t>(align),
+            static_cast<uint32_t>(size), attributes);
         builder_->Sem().Add(member, sem_member);
         sem_members.Push(sem_member);
 
@@ -4214,14 +4214,13 @@ sem::Struct* Resolver::Structure(const ast::Struct* str) {
     }
 
     auto* out = builder_->create<sem::Struct>(
-        str, str->source, str->name->symbol, std::move(sem_members),
-        static_cast<uint32_t>(struct_align), static_cast<uint32_t>(struct_size),
-        static_cast<uint32_t>(size_no_padding));
+        str, str->name->symbol, std::move(sem_members), static_cast<uint32_t>(struct_align),
+        static_cast<uint32_t>(struct_size), static_cast<uint32_t>(size_no_padding));
 
     for (size_t i = 0; i < sem_members.Length(); i++) {
         auto* mem_type = sem_members[i]->Type();
         if (mem_type->Is<type::Atomic>()) {
-            atomic_composite_info_.Add(out, &sem_members[i]->Source());
+            atomic_composite_info_.Add(out, &sem_members[i]->Declaration()->source);
             break;
         } else {
             if (auto found = atomic_composite_info_.Get(mem_type)) {
@@ -4566,7 +4565,7 @@ bool Resolver::ApplyAddressSpaceUsageToType(builtin::AddressSpace address_space,
                 utils::StringStream err;
                 err << "while analyzing structure member " << sem_.TypeNameOf(str) << "."
                     << member->Name().Name();
-                AddNote(err.str(), member->Source());
+                AddNote(err.str(), member->Declaration()->source);
                 return false;
             }
         }
diff --git a/src/tint/resolver/validator.cc b/src/tint/resolver/validator.cc
index 1d6d7cfa13..63f2b4d882 100644
--- a/src/tint/resolver/validator.cc
+++ b/src/tint/resolver/validator.cc
@@ -445,7 +445,7 @@ bool Validator::AddressSpaceLayout(const type::Type* store_ty,
 
             // Recurse into the member type.
             if (!AddressSpaceLayout(m->Type(), address_space, m->Declaration()->type->source)) {
-                AddNote("see layout of struct:\n" + str->Layout(), str->Source());
+                AddNote("see layout of struct:\n" + str->Layout(), str->Declaration()->source);
                 note_usage();
                 return false;
             }
@@ -461,13 +461,13 @@ bool Validator::AddressSpaceLayout(const type::Type* store_ty,
                              "' is currently at offset " + std::to_string(m->Offset()) +
                              ". Consider setting @align(" + std::to_string(required_align) +
                              ") on this member",
-                         m->Source());
+                         m->Declaration()->source);
 
-                AddNote("see layout of struct:\n" + str->Layout(), str->Source());
+                AddNote("see layout of struct:\n" + str->Layout(), str->Declaration()->source);
 
                 if (auto* member_str = m->Type()->As<sem::Struct>()) {
                     AddNote("and layout of struct member:\n" + member_str->Layout(),
-                            member_str->Source());
+                            member_str->Declaration()->source);
                 }
 
                 note_usage();
@@ -483,19 +483,19 @@ bool Validator::AddressSpaceLayout(const type::Type* store_ty,
                     !enabled_extensions_.Contains(
                         builtin::Extension::kChromiumInternalRelaxedUniformLayout)) {
                     AddError(
-                        "uniform storage requires that the number of bytes between the "
-                        "start of the previous member of type struct and the current "
-                        "member be a multiple of 16 bytes, but there are currently " +
+                        "uniform storage requires that the number of bytes between the start of "
+                        "the previous member of type struct and the current member be a multiple "
+                        "of 16 bytes, but there are currently " +
                             std::to_string(prev_to_curr_offset) + " bytes between '" +
                             member_name_of(prev_member) + "' and '" + member_name_of(m) +
                             "'. Consider setting @align(16) on this member",
-                        m->Source());
+                        m->Declaration()->source);
 
-                    AddNote("see layout of struct:\n" + str->Layout(), str->Source());
+                    AddNote("see layout of struct:\n" + str->Layout(), str->Declaration()->source);
 
                     auto* prev_member_str = prev_member->Type()->As<sem::Struct>();
                     AddNote("and layout of previous member struct:\n" + prev_member_str->Layout(),
-                            prev_member_str->Source());
+                            prev_member_str->Declaration()->source);
                     note_usage();
                     return false;
                 }
@@ -1213,8 +1213,8 @@ bool Validator::EntryPoint(const sem::Function* func, ast::PipelineStage stage)
             if (auto* str = ty->As<sem::Struct>()) {
                 for (auto* member : str->Members()) {
                     if (!validate_entry_point_attributes_inner(
-                            member->Declaration()->attributes, member->Type(), member->Source(),
-                            param_or_ret,
+                            member->Declaration()->attributes, member->Type(),
+                            member->Declaration()->source, param_or_ret,
                             /*is_struct_member*/ true, member->Attributes().location)) {
                         AddNote("while analyzing entry point '" + decl->name->symbol.Name() + "'",
                                 decl->source);
@@ -2066,7 +2066,7 @@ bool Validator::Alias(const ast::Alias*) const {
 
 bool Validator::Structure(const sem::Struct* str, ast::PipelineStage stage) const {
     if (str->Members().IsEmpty()) {
-        AddError("structures must have at least one member", str->Source());
+        AddError("structures must have at least one member", str->Declaration()->source);
         return false;
     }
 
@@ -2076,7 +2076,7 @@ bool Validator::Structure(const sem::Struct* str, ast::PipelineStage stage) cons
             if (r->Count()->Is<type::RuntimeArrayCount>()) {
                 if (member != str->Members().Back()) {
                     AddError("runtime arrays may only appear as the last member of a struct",
-                             member->Source());
+                             member->Declaration()->source);
                     return false;
                 }
             }
@@ -2088,7 +2088,7 @@ bool Validator::Structure(const sem::Struct* str, ast::PipelineStage stage) cons
         } else if (!IsFixedFootprint(member->Type())) {
             AddError(
                 "a struct that contains a runtime array cannot be nested inside another struct",
-                member->Source());
+                member->Declaration()->source);
             return false;
         }
 
@@ -2107,7 +2107,8 @@ bool Validator::Structure(const sem::Struct* str, ast::PipelineStage stage) cons
                     has_location = true;
                     TINT_ASSERT(Resolver, member->Attributes().location.has_value());
                     if (!LocationAttribute(location, member->Attributes().location.value(),
-                                           member->Type(), locations, stage, member->Source())) {
+                                           member->Type(), locations, stage,
+                                           member->Declaration()->source)) {
                         return false;
                     }
                     return true;
diff --git a/src/tint/sem/struct.cc b/src/tint/sem/struct.cc
index 6856d0f0b2..e6c0e73d60 100644
--- a/src/tint/sem/struct.cc
+++ b/src/tint/sem/struct.cc
@@ -22,20 +22,18 @@ TINT_INSTANTIATE_TYPEINFO(tint::sem::StructMember);
 namespace tint::sem {
 
 Struct::Struct(const ast::Struct* declaration,
-               tint::Source source,
                Symbol name,
                utils::VectorRef<const StructMember*> members,
                uint32_t align,
                uint32_t size,
                uint32_t size_no_padding)
-    : Base(source, name, members, align, size, size_no_padding), declaration_(declaration) {
+    : Base(name, members, align, size, size_no_padding), declaration_(declaration) {
     TINT_ASSERT(Semantic, declaration != nullptr);
 }
 
 Struct::~Struct() = default;
 
 StructMember::StructMember(const ast::StructMember* declaration,
-                           tint::Source source,
                            Symbol name,
                            const type::Type* type,
                            uint32_t index,
@@ -43,7 +41,7 @@ StructMember::StructMember(const ast::StructMember* declaration,
                            uint32_t align,
                            uint32_t size,
                            const type::StructMemberAttributes& attributes)
-    : Base(source, name, type, index, offset, align, size, attributes), declaration_(declaration) {
+    : Base(name, type, index, offset, align, size, attributes), declaration_(declaration) {
     TINT_ASSERT(Semantic, declaration != nullptr);
 }
 
diff --git a/src/tint/sem/struct.h b/src/tint/sem/struct.h
index c927875bdf..fd59dcda58 100644
--- a/src/tint/sem/struct.h
+++ b/src/tint/sem/struct.h
@@ -43,14 +43,12 @@ class Struct final : public utils::Castable<Struct, type::Struct> {
   public:
     /// Constructor
     /// @param declaration the AST structure declaration
-    /// @param source the source of the structure
     /// @param name the name of the structure
     /// @param members the structure members
     /// @param align the byte alignment of the structure
     /// @param size the byte size of the structure
     /// @param size_no_padding size of the members without the end of structure alignment padding
     Struct(const ast::Struct* declaration,
-           tint::Source source,
            Symbol name,
            utils::VectorRef<const StructMember*> members,
            uint32_t align,
@@ -78,7 +76,6 @@ class StructMember final : public utils::Castable<StructMember, type::StructMemb
   public:
     /// Constructor
     /// @param declaration the AST declaration node
-    /// @param source the source of the struct member
     /// @param name the name of the structure member
     /// @param type the type of the member
     /// @param index the index of the member in the structure
@@ -87,7 +84,6 @@ class StructMember final : public utils::Castable<StructMember, type::StructMemb
     /// @param size the byte size of the member
     /// @param attributes the optional attributes
     StructMember(const ast::StructMember* declaration,
-                 tint::Source source,
                  Symbol name,
                  const type::Type* type,
                  uint32_t index,
diff --git a/src/tint/sem/struct_test.cc b/src/tint/sem/struct_test.cc
index 424930d0d0..c267234564 100644
--- a/src/tint/sem/struct_test.cc
+++ b/src/tint/sem/struct_test.cc
@@ -26,8 +26,8 @@ TEST_F(SemStructTest, Creation) {
     auto name = Sym("S");
     auto* impl = create<ast::Struct>(Ident(name), utils::Empty, utils::Empty);
     auto* ptr = impl;
-    auto* s = create<sem::Struct>(impl, impl->source, impl->name->symbol, utils::Empty,
-                                  4u /* align */, 8u /* size */, 16u /* size_no_padding */);
+    auto* s = create<sem::Struct>(impl, impl->name->symbol, utils::Empty, 4u /* align */,
+                                  8u /* size */, 16u /* size_no_padding */);
     EXPECT_EQ(s->Declaration(), ptr);
     EXPECT_EQ(s->Align(), 4u);
     EXPECT_EQ(s->Size(), 8u);
@@ -36,11 +36,11 @@ TEST_F(SemStructTest, Creation) {
 
 TEST_F(SemStructTest, Equals) {
     auto* a_impl = create<ast::Struct>(Ident("a"), utils::Empty, utils::Empty);
-    auto* a = create<sem::Struct>(a_impl, a_impl->source, a_impl->name->symbol, utils::Empty,
-                                  4u /* align */, 4u /* size */, 4u /* size_no_padding */);
+    auto* a = create<sem::Struct>(a_impl, a_impl->name->symbol, utils::Empty, 4u /* align */,
+                                  4u /* size */, 4u /* size_no_padding */);
     auto* b_impl = create<ast::Struct>(Ident("b"), utils::Empty, utils::Empty);
-    auto* b = create<sem::Struct>(b_impl, b_impl->source, b_impl->name->symbol, utils::Empty,
-                                  4u /* align */, 4u /* size */, 4u /* size_no_padding */);
+    auto* b = create<sem::Struct>(b_impl, b_impl->name->symbol, utils::Empty, 4u /* align */,
+                                  4u /* size */, 4u /* size_no_padding */);
 
     EXPECT_TRUE(a->Equals(*a));
     EXPECT_FALSE(a->Equals(*b));
@@ -50,8 +50,8 @@ TEST_F(SemStructTest, Equals) {
 TEST_F(SemStructTest, FriendlyName) {
     auto name = Sym("my_struct");
     auto* impl = create<ast::Struct>(Ident(name), utils::Empty, utils::Empty);
-    auto* s = create<sem::Struct>(impl, impl->source, impl->name->symbol, utils::Empty,
-                                  4u /* align */, 4u /* size */, 4u /* size_no_padding */);
+    auto* s = create<sem::Struct>(impl, impl->name->symbol, utils::Empty, 4u /* align */,
+                                  4u /* size */, 4u /* size_no_padding */);
     EXPECT_EQ(s->FriendlyName(), "my_struct");
 }
 
diff --git a/src/tint/transform/transform_test.cc b/src/tint/transform/transform_test.cc
index 1201e98f33..2da1ec5535 100644
--- a/src/tint/transform/transform_test.cc
+++ b/src/tint/transform/transform_test.cc
@@ -120,8 +120,8 @@ TEST_F(CreateASTTypeForTest, AliasedArrayWithComplexOverrideLength) {
 TEST_F(CreateASTTypeForTest, Struct) {
     auto str = create([](ProgramBuilder& b) {
         auto* decl = b.Structure("S", {});
-        return b.create<sem::Struct>(decl, decl->source, decl->name->symbol, utils::Empty,
-                                     4u /* align */, 4u /* size */, 4u /* size_no_padding */);
+        return b.create<sem::Struct>(decl, decl->name->symbol, utils::Empty, 4u /* align */,
+                                     4u /* size */, 4u /* size_no_padding */);
     });
 
     ast::CheckIdentifier(str, "S");
diff --git a/src/tint/type/struct.cc b/src/tint/type/struct.cc
index 58d58e6bc4..c9864cbae3 100644
--- a/src/tint/type/struct.cc
+++ b/src/tint/type/struct.cc
@@ -52,14 +52,12 @@ type::Flags FlagsFrom(utils::VectorRef<const StructMember*> members) {
 
 }  // namespace
 
-Struct::Struct(tint::Source source,
-               Symbol name,
+Struct::Struct(Symbol name,
                utils::VectorRef<const StructMember*> members,
                uint32_t align,
                uint32_t size,
                uint32_t size_no_padding)
     : Base(utils::Hash(utils::TypeInfo::Of<Struct>().full_hashcode, name), FlagsFrom(members)),
-      source_(source),
       name_(name),
       members_(std::move(members)),
       align_(align),
@@ -169,19 +167,17 @@ Struct* Struct::Clone(CloneContext& ctx) const {
     for (const auto& mem : members_) {
         members.Push(mem->Clone(ctx));
     }
-    return ctx.dst.mgr->Get<Struct>(source_, sym, members, align_, size_, size_no_padding_);
+    return ctx.dst.mgr->Get<Struct>(sym, members, align_, size_, size_no_padding_);
 }
 
-StructMember::StructMember(tint::Source source,
-                           Symbol name,
+StructMember::StructMember(Symbol name,
                            const type::Type* type,
                            uint32_t index,
                            uint32_t offset,
                            uint32_t align,
                            uint32_t size,
                            const StructMemberAttributes& attributes)
-    : source_(source),
-      name_(name),
+    : name_(name),
       type_(type),
       index_(index),
       offset_(offset),
@@ -194,8 +190,7 @@ StructMember::~StructMember() = default;
 StructMember* StructMember::Clone(CloneContext& ctx) const {
     auto sym = ctx.dst.st->Register(name_.Name());
     auto* ty = type_->Clone(ctx);
-    return ctx.dst.mgr->Get<StructMember>(source_, sym, ty, index_, offset_, align_, size_,
-                                          attributes_);
+    return ctx.dst.mgr->Get<StructMember>(sym, ty, index_, offset_, align_, size_, attributes_);
 }
 
 }  // namespace tint::type
diff --git a/src/tint/type/struct.h b/src/tint/type/struct.h
index fc214ba9ee..08119d0ca5 100644
--- a/src/tint/type/struct.h
+++ b/src/tint/type/struct.h
@@ -49,15 +49,13 @@ enum class PipelineStageUsage {
 class Struct : public utils::Castable<Struct, Type> {
   public:
     /// Constructor
-    /// @param source the source of the structure
     /// @param name the name of the structure
     /// @param members the structure members
     /// @param align the byte alignment of the structure
     /// @param size the byte size of the structure
     /// @param size_no_padding size of the members without the end of structure
     /// alignment padding
-    Struct(tint::Source source,
-           Symbol name,
+    Struct(Symbol name,
            utils::VectorRef<const StructMember*> members,
            uint32_t align,
            uint32_t size,
@@ -70,9 +68,6 @@ class Struct : public utils::Castable<Struct, Type> {
     /// @returns true if the this type is equal to @p other
     bool Equals(const UniqueNode& other) const override;
 
-    /// @returns the source of the structure
-    tint::Source Source() const { return source_; }
-
     /// @returns the name of the structure
     Symbol Name() const { return name_; }
 
@@ -153,7 +148,6 @@ class Struct : public utils::Castable<Struct, Type> {
     Struct* Clone(CloneContext& ctx) const override;
 
   private:
-    const tint::Source source_;
     const Symbol name_;
     const utils::Vector<const StructMember*, 4> members_;
     const uint32_t align_;
@@ -180,7 +174,6 @@ struct StructMemberAttributes {
 class StructMember : public utils::Castable<StructMember, Node> {
   public:
     /// Constructor
-    /// @param source the source of the struct member
     /// @param name the name of the structure member
     /// @param type the type of the member
     /// @param index the index of the member in the structure
@@ -188,8 +181,7 @@ class StructMember : public utils::Castable<StructMember, Node> {
     /// @param align the byte alignment of the member
     /// @param size the byte size of the member
     /// @param attributes the optional attributes
-    StructMember(tint::Source source,
-                 Symbol name,
+    StructMember(Symbol name,
                  const type::Type* type,
                  uint32_t index,
                  uint32_t offset,
@@ -200,9 +192,6 @@ class StructMember : public utils::Castable<StructMember, Node> {
     /// Destructor
     ~StructMember() override;
 
-    /// @returns the source the struct member
-    const tint::Source& Source() const { return source_; }
-
     /// @returns the name of the structure member
     Symbol Name() const { return name_; }
 
@@ -236,7 +225,6 @@ class StructMember : public utils::Castable<StructMember, Node> {
     StructMember* Clone(CloneContext& ctx) const;
 
   private:
-    const tint::Source source_;
     const Symbol name_;
     const type::Struct* struct_;
     const type::Type* type_;
diff --git a/src/tint/type/struct_test.cc b/src/tint/type/struct_test.cc
index d7f68a15b1..bb88740f79 100644
--- a/src/tint/type/struct_test.cc
+++ b/src/tint/type/struct_test.cc
@@ -24,7 +24,7 @@ using TypeStructTest = TestHelper;
 
 TEST_F(TypeStructTest, Creation) {
     auto name = Sym("S");
-    auto* s = create<Struct>(Source{}, name, utils::Empty, 4u /* align */, 8u /* size */,
+    auto* s = create<Struct>(name, utils::Empty, 4u /* align */, 8u /* size */,
                              16u /* size_no_padding */);
     EXPECT_EQ(s->Align(), 4u);
     EXPECT_EQ(s->Size(), 8u);
@@ -32,9 +32,9 @@ TEST_F(TypeStructTest, Creation) {
 }
 
 TEST_F(TypeStructTest, Equals) {
-    auto* a = create<Struct>(Source{}, Sym("a"), utils::Empty, 4u /* align */, 4u /* size */,
+    auto* a = create<Struct>(Sym("a"), utils::Empty, 4u /* align */, 4u /* size */,
                              4u /* size_no_padding */);
-    auto* b = create<Struct>(Source{}, Sym("b"), utils::Empty, 4u /* align */, 4u /* size */,
+    auto* b = create<Struct>(Sym("b"), utils::Empty, 4u /* align */, 4u /* size */,
                              4u /* size_no_padding */);
 
     EXPECT_TRUE(a->Equals(*a));
@@ -44,8 +44,8 @@ TEST_F(TypeStructTest, Equals) {
 
 TEST_F(TypeStructTest, FriendlyName) {
     auto name = Sym("my_struct");
-    auto* s = create<Struct>(Source{}, name, utils::Empty, 4u /* align */, 4u /* size */,
-                             4u /* size_no_padding */);
+    auto* s =
+        create<Struct>(name, utils::Empty, 4u /* align */, 4u /* size */, 4u /* size_no_padding */);
     EXPECT_EQ(s->FriendlyName(), "my_struct");
 }
 
@@ -209,10 +209,10 @@ TEST_F(TypeStructTest, Clone) {
     attrs_location_2.location = 2;
 
     auto* s = create<Struct>(
-        Source{}, Sym("my_struct"),
-        utils::Vector{create<StructMember>(Source{}, Sym("b"), create<Vector>(create<F32>(), 3u),
-                                           0u, 0u, 16u, 12u, attrs_location_2),
-                      create<StructMember>(Source{}, Sym("a"), create<I32>(), 1u, 16u, 4u, 4u,
+        Sym("my_struct"),
+        utils::Vector{create<StructMember>(Sym("b"), create<Vector>(create<F32>(), 3u), 0u, 0u, 16u,
+                                           12u, attrs_location_2),
+                      create<StructMember>(Sym("a"), create<I32>(), 1u, 16u, 4u, 4u,
                                            type::StructMemberAttributes{})},
         4u /* align */, 8u /* size */, 16u /* size_no_padding */);
 
diff --git a/src/tint/type/type_test.cc b/src/tint/type/type_test.cc
index a09ab85ad6..b76a43a008 100644
--- a/src/tint/type/type_test.cc
+++ b/src/tint/type/type_test.cc
@@ -45,11 +45,9 @@ struct TypeTest : public TestHelper {
     const Matrix* mat4x3_af = create<Matrix>(vec3_af, 4u);
     const Reference* ref_u32 =
         create<Reference>(u32, builtin::AddressSpace::kPrivate, builtin::Access::kReadWrite);
-    const Struct* str_f32 = create<Struct>(Source{},
-                                           Sym("str_f32"),
+    const Struct* str_f32 = create<Struct>(Sym("str_f32"),
                                            utils::Vector{
                                                create<StructMember>(
-                                                   /* source */ Source{},
                                                    /* name */ Sym("x"),
                                                    /* type */ f32,
                                                    /* index */ 0u,
@@ -61,11 +59,9 @@ struct TypeTest : public TestHelper {
                                            /* align*/ 4u,
                                            /* size*/ 4u,
                                            /* size_no_padding*/ 4u);
-    const Struct* str_f16 = create<Struct>(Source{},
-                                           Sym("str_f16"),
+    const Struct* str_f16 = create<Struct>(Sym("str_f16"),
                                            utils::Vector{
                                                create<StructMember>(
-                                                   /* source */ Source{},
                                                    /* name */ Sym("x"),
                                                    /* type */ f16,
                                                    /* index */ 0u,
@@ -77,11 +73,9 @@ struct TypeTest : public TestHelper {
                                            /* align*/ 4u,
                                            /* size*/ 4u,
                                            /* size_no_padding*/ 4u);
-    Struct* str_af = create<Struct>(Source{},
-                                    Sym("str_af"),
+    Struct* str_af = create<Struct>(Sym("str_af"),
                                     utils::Vector{
                                         create<StructMember>(
-                                            /* source */ Source{},
                                             /* name */ Sym("x"),
                                             /* type */ af,
                                             /* index */ 0u,