src/tint/resolver/storage_class_validation_test.cc - dawn - Git at Google

 // Copyright 2021 The Tint Authors.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 #include "src/tint/resolver/resolver.h"

 #include "gmock/gmock.h"
 #include "src/tint/resolver/resolver_test_helper.h"
 #include "src/tint/sem/struct.h"

 using namespace tint::number_suffixes;  // NOLINT

 namespace tint::resolver {
 namespace {

 using ::testing::HasSubstr;

 using ResolverStorageClassValidationTest = ResolverTest;

 TEST_F(ResolverStorageClassValidationTest, GlobalVariableNoStorageClass_Fail) {
     // var g : f32;
     GlobalVar(Source{{12, 34}}, "g", ty.f32());

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               "12:34 error: module-scope 'var' declaration must have a storage class");
 }

 TEST_F(ResolverStorageClassValidationTest, GlobalVariableFunctionStorageClass_Fail) {
     // var<function> g : f32;
     GlobalVar(Source{{12, 34}}, "g", ty.f32(), ast::StorageClass::kFunction);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               "12:34 error: module-scope 'var' must not use storage class 'function'");
 }

 TEST_F(ResolverStorageClassValidationTest, Private_RuntimeArray) {
     GlobalVar(Source{{12, 34}}, "v", ty.array(ty.i32()), ast::StorageClass::kPrivate);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
 12:34 note: while instantiating 'var' v)");
 }

 TEST_F(ResolverStorageClassValidationTest, Private_RuntimeArrayInStruct) {
     auto* s = Structure("S", utils::Vector{Member("m", ty.array(ty.i32()))});
     GlobalVar(Source{{12, 34}}, "v", ty.Of(s), ast::StorageClass::kPrivate);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
 note: while analysing structure member S.m
 12:34 note: while instantiating 'var' v)");
 }

 TEST_F(ResolverStorageClassValidationTest, Workgroup_RuntimeArray) {
     GlobalVar(Source{{12, 34}}, "v", ty.array(ty.i32()), ast::StorageClass::kWorkgroup);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
 12:34 note: while instantiating 'var' v)");
 }

 TEST_F(ResolverStorageClassValidationTest, Workgroup_RuntimeArrayInStruct) {
     auto* s = Structure("S", utils::Vector{Member("m", ty.array(ty.i32()))});
     GlobalVar(Source{{12, 34}}, "v", ty.Of(s), ast::StorageClass::kWorkgroup);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
 note: while analysing structure member S.m
 12:34 note: while instantiating 'var' v)");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferBool) {
     // var<storage> g : bool;
     GlobalVar(Source{{56, 78}}, "g", ty.bool_(), ast::StorageClass::kStorage, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'bool' cannot be used in storage class 'storage' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferBoolAlias) {
     // type a = bool;
     // var<storage, read> g : a;
     auto* a = Alias("a", ty.bool_());
     GlobalVar(Source{{56, 78}}, "g", ty.Of(a), ast::StorageClass::kStorage, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'bool' cannot be used in storage class 'storage' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 // F16 types in storage and uniform buffer is not implemented yet.
 // TODO(tint:1473, tint:1502): make these testcases valid after f16 is supported.
 TEST_F(ResolverStorageClassValidationTest, StorageBufferF16_TemporallyBan) {
     // var<storage> g : f16;
     Enable(ast::Extension::kF16);

     GlobalVar("g", ty.f16(Source{{56, 78}}), ast::StorageClass::kStorage, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(r()->error(),
               "56:78 error: using f16 types in 'storage' storage class is not "
               "implemented yet");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferF16Alias_TemporallyBan) {
     // type a = f16;
     // var<storage, read> g : a;
     Enable(ast::Extension::kF16);

     auto* a = Alias("a", ty.f16());
     GlobalVar("g", ty.type_name(Source{{56, 78}}, a->name), ast::StorageClass::kStorage,
               Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(r()->error(),
               "56:78 error: using f16 types in 'storage' storage class is not "
               "implemented yet");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferVectorF16_TemporallyBan) {
     // var<storage> g : vec4<f16>;
     Enable(ast::Extension::kF16);
     GlobalVar("g", ty.vec(Source{{56, 78}}, ty.Of<f16>(), 4u), ast::StorageClass::kStorage,
               Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(r()->error(),
               "56:78 error: using f16 types in 'storage' storage class is not "
               "implemented yet");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferArrayF16_TemporallyBan) {
     // struct S { a : f16 };
     // var<storage, read> g : array<S, 3u>;
     Enable(ast::Extension::kF16);

     auto* s = Structure("S", utils::Vector{Member("a", ty.f16(Source{{56, 78}}))});
     auto* a = ty.array(ty.Of(s), 3_u);
     GlobalVar("g", a, ast::StorageClass::kStorage, ast::Access::kRead, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("56:78 error: using f16 types in 'storage' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferStructF16_TemporallyBan) {
     // struct S { x : f16 };
     // var<storage, read> g : S;
     Enable(ast::Extension::kF16);

     auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
     GlobalVar("g", ty.Of(s), ast::StorageClass::kStorage, ast::Access::kRead, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'storage' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferNoErrorStructF16Aliases_TemporallyBan) {
     // struct S { x : f16 };
     // type a1 = S;
     // var<storage, read> g : a1;
     Enable(ast::Extension::kF16);

     auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
     auto* a1 = Alias("a1", ty.Of(s));
     auto* a2 = Alias("a2", ty.Of(a1));
     GlobalVar("g", ty.Of(a2), ast::StorageClass::kStorage, ast::Access::kRead, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'storage' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferPointer) {
     // var<storage> g : ptr<private, f32>;
     GlobalVar(Source{{56, 78}}, "g", ty.pointer(ty.f32(), ast::StorageClass::kPrivate),
               ast::StorageClass::kStorage, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'ptr<private, f32, read_write>' cannot be used in storage class 'storage' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferIntScalar) {
     // var<storage> g : i32;
     GlobalVar(Source{{56, 78}}, "g", ty.i32(), ast::StorageClass::kStorage, Binding(0_a),
               Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferVectorF32) {
     // var<storage> g : vec4<f32>;
     GlobalVar(Source{{56, 78}}, "g", ty.vec4<f32>(), ast::StorageClass::kStorage, Binding(0_a),
               Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferArrayF32) {
     // var<storage, read> g : array<S, 3u>;
     auto* s = Structure("S", utils::Vector{Member("a", ty.f32())});
     auto* a = ty.array(ty.Of(s), 3_u);
     GlobalVar(Source{{56, 78}}, "g", a, ast::StorageClass::kStorage, ast::Access::kRead,
               Binding(0_a), Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, NotStorage_AccessMode) {
     // var<private, read> g : a;
     GlobalVar(Source{{56, 78}}, "g", ty.i32(), ast::StorageClass::kPrivate, ast::Access::kRead);

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: only variables in <storage> storage class may declare an access mode)");
 }

 TEST_F(ResolverStorageClassValidationTest, Storage_ReadAccessMode) {
     // @group(0) @binding(0) var<storage, read> a : i32;
     GlobalVar(Source{{56, 78}}, "a", ty.i32(), ast::StorageClass::kStorage, ast::Access::kRead,
               Group(0_a), Binding(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, Storage_ReadWriteAccessMode) {
     // @group(0) @binding(0) var<storage, read_write> a : i32;
     GlobalVar(Source{{56, 78}}, "a", ty.i32(), ast::StorageClass::kStorage, ast::Access::kReadWrite,
               Group(0_a), Binding(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, Storage_WriteAccessMode) {
     // @group(0) @binding(0) var<storage, read_write> a : i32;
     GlobalVar(Source{{56, 78}}, "a", ty.i32(), ast::StorageClass::kStorage, ast::Access::kWrite,
               Group(0_a), Binding(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(r()->error(),
               R"(56:78 error: access mode 'write' is not valid for the 'storage' address space)");
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferStructI32) {
     // struct S { x : i32 };
     // var<storage, read> g : S;
     auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
     GlobalVar(Source{{56, 78}}, "g", ty.Of(s), ast::StorageClass::kStorage, ast::Access::kRead,
               Binding(0_a), Group(0_a));

     ASSERT_TRUE(r()->Resolve());
 }

 TEST_F(ResolverStorageClassValidationTest, StorageBufferNoErrorStructI32Aliases) {
     // struct S { x : i32 };
     // type a1 = S;
     // var<storage, read> g : a1;
     auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
     auto* a1 = Alias("a1", ty.Of(s));
     auto* a2 = Alias("a2", ty.Of(a1));
     GlobalVar(Source{{56, 78}}, "g", ty.Of(a2), ast::StorageClass::kStorage, ast::Access::kRead,
               Binding(0_a), Group(0_a));

     ASSERT_TRUE(r()->Resolve());
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBuffer_Struct_Runtime) {
     // struct S { m:  array<f32>; };
     // @group(0) @binding(0) var<uniform, > svar : S;

     auto* s = Structure(Source{{12, 34}}, "S", utils::Vector{Member("m", ty.array<i32>())});

     GlobalVar(Source{{56, 78}}, "svar", ty.Of(s), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               R"(56:78 error: runtime-sized arrays can only be used in the <storage> storage class
 note: while analysing structure member S.m
 56:78 note: while instantiating 'var' svar)");
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferBool) {
     // var<uniform> g : bool;
     GlobalVar(Source{{56, 78}}, "g", ty.bool_(), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'bool' cannot be used in storage class 'uniform' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferBoolAlias) {
     // type a = bool;
     // var<uniform> g : a;
     auto* a = Alias("a", ty.bool_());
     GlobalVar(Source{{56, 78}}, "g", ty.Of(a), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'bool' cannot be used in storage class 'uniform' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 // F16 types in storage and uniform buffer is not implemented yet.
 // TODO(tint:1473, tint:1502): make these testcases valid after f16 is supported.
 TEST_F(ResolverStorageClassValidationTest, UniformBufferF16_TemporallyBan) {
     // var<uniform> g : f16;
     Enable(ast::Extension::kF16);

     GlobalVar("g", ty.f16(Source{{56, 78}}), ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(r()->error(),
               "56:78 error: using f16 types in 'uniform' storage class is not "
               "implemented yet");
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferF16Alias_TemporallyBan) {
     // type a = f16;
     // var<uniform> g : a;
     Enable(ast::Extension::kF16);

     auto* a = Alias("a", ty.f16());
     GlobalVar("g", ty.type_name(Source{{56, 78}}, a->name), ast::StorageClass::kUniform,
               Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(r()->error(),
               "56:78 error: using f16 types in 'uniform' storage class is not "
               "implemented yet");
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferVectorF16_TemporallyBan) {
     // var<uniform> g : vec4<f16>;
     Enable(ast::Extension::kF16);
     GlobalVar("g", ty.vec(Source{{56, 78}}, ty.Of<f16>(), 4u), ast::StorageClass::kUniform,
               Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("56:78 error: using f16 types in 'uniform' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferArrayF16_TemporallyBan) {
     // struct S {
     //   @size(16) f : f16;
     // }
     // var<uniform> g : array<S, 3u>;
     Enable(ast::Extension::kF16);

     auto* s = Structure(
         "S", utils::Vector{Member("a", ty.f16(Source{{56, 78}}), utils::Vector{MemberSize(16_a)})});
     auto* a = ty.array(ty.Of(s), 3_u);
     GlobalVar("g", a, ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("56:78 error: using f16 types in 'uniform' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferStructF16_TemporallyBan) {
     // struct S { x : f16 };
     // var<uniform> g :  S;
     Enable(ast::Extension::kF16);

     auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
     GlobalVar("g", ty.Of(s), ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'uniform' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferStructF16Aliases_TemporallyBan) {
     // struct S { x : f16 };
     // type a1 = S;
     // var<uniform> g : a1;
     Enable(ast::Extension::kF16);

     auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
     auto* a1 = Alias("a1", ty.Of(s));
     GlobalVar("g", ty.Of(a1), ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'uniform' storage "
                                         "class is not implemented yet"));
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferPointer) {
     // var<uniform> g : ptr<private, f32>;
     GlobalVar(Source{{56, 78}}, "g", ty.pointer(ty.f32(), ast::StorageClass::kPrivate),
               ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

     ASSERT_FALSE(r()->Resolve());

     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'ptr<private, f32, read_write>' cannot be used in storage class 'uniform' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferIntScalar) {
     // var<uniform> g : i32;
     GlobalVar(Source{{56, 78}}, "g", ty.i32(), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferVectorF32) {
     // var<uniform> g : vec4<f32>;
     GlobalVar(Source{{56, 78}}, "g", ty.vec4<f32>(), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferArrayF32) {
     // struct S {
     //   @size(16) f : f32;
     // }
     // var<uniform> g : array<S, 3u>;
     auto* s = Structure("S", utils::Vector{Member("a", ty.f32(), utils::Vector{MemberSize(16_a)})});
     auto* a = ty.array(ty.Of(s), 3_u);
     GlobalVar(Source{{56, 78}}, "g", a, ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferStructI32) {
     // struct S { x : i32 };
     // var<uniform> g :  S;
     auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
     GlobalVar(Source{{56, 78}}, "g", ty.Of(s), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, UniformBufferStructI32Aliases) {
     // struct S { x : i32 };
     // type a1 = S;
     // var<uniform> g : a1;
     auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
     auto* a1 = Alias("a1", ty.Of(s));
     GlobalVar(Source{{56, 78}}, "g", ty.Of(a1), ast::StorageClass::kUniform, Binding(0_a),
               Group(0_a));

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantBool) {
     // enable chromium_experimental_push_constant;
     // var<push_constant> g : bool;
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     GlobalVar(Source{{56, 78}}, "g", ty.bool_(), ast::StorageClass::kPushConstant);

     ASSERT_FALSE(r()->Resolve());
     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'bool' cannot be used in storage class 'push_constant' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantF16) {
     // enable chromium_experimental_push_constant;
     // enable f16;
     // var<push_constant> g : f16;
     Enable(ast::Extension::kF16);
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     GlobalVar("g", ty.f16(Source{{56, 78}}), ast::StorageClass::kPushConstant);

     ASSERT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(),
               "56:78 error: using f16 types in 'push_constant' storage class is not "
               "implemented yet");
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantPointer) {
     // enable chromium_experimental_push_constant;
     // var<push_constant> g : ptr<private, f32>;
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     GlobalVar(Source{{56, 78}}, "g", ty.pointer(ty.f32(), ast::StorageClass::kPrivate),
               ast::StorageClass::kPushConstant);

     ASSERT_FALSE(r()->Resolve());
     EXPECT_EQ(
         r()->error(),
         R"(56:78 error: Type 'ptr<private, f32, read_write>' cannot be used in storage class 'push_constant' as it is non-host-shareable
 56:78 note: while instantiating 'var' g)");
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantIntScalar) {
     // enable chromium_experimental_push_constant;
     // var<push_constant> g : i32;
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     GlobalVar("g", ty.i32(), ast::StorageClass::kPushConstant);

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantVectorF32) {
     // enable chromium_experimental_push_constant;
     // var<push_constant> g : vec4<f32>;
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     GlobalVar("g", ty.vec4<f32>(), ast::StorageClass::kPushConstant);

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantArrayF32) {
     // enable chromium_experimental_push_constant;
     // struct S { a : f32}
     // var<push_constant> g : array<S, 3u>;
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     auto* s = Structure("S", utils::Vector{Member("a", ty.f32())});
     auto* a = ty.array(ty.Of(s), 3_u);
     GlobalVar("g", a, ast::StorageClass::kPushConstant);

     ASSERT_TRUE(r()->Resolve()) << r()->error();
 }

 TEST_F(ResolverStorageClassValidationTest, PushConstantWithInitializer) {
     // enable chromium_experimental_push_constant;
     // var<push_constant> a : u32 = 0u;
     Enable(ast::Extension::kChromiumExperimentalPushConstant);
     GlobalVar(Source{{1u, 2u}}, "a", ty.u32(), ast::StorageClass::kPushConstant,
               Expr(Source{{3u, 4u}}, u32(0)));

     ASSERT_FALSE(r()->Resolve());
     EXPECT_EQ(
         r()->error(),
         R"(1:2 error: var of storage class 'push_constant' cannot have an initializer. var initializers are only supported for the storage classes 'private' and 'function')");
 }

 }  // namespace
 }  // namespace tint::resolver
	// Copyright 2021 The Tint Authors.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	#include "src/tint/resolver/resolver.h"

	#include "gmock/gmock.h"
	#include "src/tint/resolver/resolver_test_helper.h"
	#include "src/tint/sem/struct.h"

	using namespace tint::number_suffixes; // NOLINT

	namespace tint::resolver {
	namespace {

	using ::testing::HasSubstr;

	using ResolverStorageClassValidationTest = ResolverTest;

	TEST_F(ResolverStorageClassValidationTest, GlobalVariableNoStorageClass_Fail) {
	// var g : f32;
	GlobalVar(Source{{12, 34}}, "g", ty.f32());

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	"12:34 error: module-scope 'var' declaration must have a storage class");
	}

	TEST_F(ResolverStorageClassValidationTest, GlobalVariableFunctionStorageClass_Fail) {
	// var<function> g : f32;
	GlobalVar(Source{{12, 34}}, "g", ty.f32(), ast::StorageClass::kFunction);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	"12:34 error: module-scope 'var' must not use storage class 'function'");
	}

	TEST_F(ResolverStorageClassValidationTest, Private_RuntimeArray) {
	GlobalVar(Source{{12, 34}}, "v", ty.array(ty.i32()), ast::StorageClass::kPrivate);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
	12:34 note: while instantiating 'var' v)");
	}

	TEST_F(ResolverStorageClassValidationTest, Private_RuntimeArrayInStruct) {
	auto* s = Structure("S", utils::Vector{Member("m", ty.array(ty.i32()))});
	GlobalVar(Source{{12, 34}}, "v", ty.Of(s), ast::StorageClass::kPrivate);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
	note: while analysing structure member S.m
	12:34 note: while instantiating 'var' v)");
	}

	TEST_F(ResolverStorageClassValidationTest, Workgroup_RuntimeArray) {
	GlobalVar(Source{{12, 34}}, "v", ty.array(ty.i32()), ast::StorageClass::kWorkgroup);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
	12:34 note: while instantiating 'var' v)");
	}

	TEST_F(ResolverStorageClassValidationTest, Workgroup_RuntimeArrayInStruct) {
	auto* s = Structure("S", utils::Vector{Member("m", ty.array(ty.i32()))});
	GlobalVar(Source{{12, 34}}, "v", ty.Of(s), ast::StorageClass::kWorkgroup);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	R"(12:34 error: runtime-sized arrays can only be used in the <storage> storage class
	note: while analysing structure member S.m
	12:34 note: while instantiating 'var' v)");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferBool) {
	// var<storage> g : bool;
	GlobalVar(Source{{56, 78}}, "g", ty.bool_(), ast::StorageClass::kStorage, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'bool' cannot be used in storage class 'storage' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferBoolAlias) {
	// type a = bool;
	// var<storage, read> g : a;
	auto* a = Alias("a", ty.bool_());
	GlobalVar(Source{{56, 78}}, "g", ty.Of(a), ast::StorageClass::kStorage, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'bool' cannot be used in storage class 'storage' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	// F16 types in storage and uniform buffer is not implemented yet.
	// TODO(tint:1473, tint:1502): make these testcases valid after f16 is supported.
	TEST_F(ResolverStorageClassValidationTest, StorageBufferF16_TemporallyBan) {
	// var<storage> g : f16;
	Enable(ast::Extension::kF16);

	GlobalVar("g", ty.f16(Source{{56, 78}}), ast::StorageClass::kStorage, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(r()->error(),
	"56:78 error: using f16 types in 'storage' storage class is not "
	"implemented yet");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferF16Alias_TemporallyBan) {
	// type a = f16;
	// var<storage, read> g : a;
	Enable(ast::Extension::kF16);

	auto* a = Alias("a", ty.f16());
	GlobalVar("g", ty.type_name(Source{{56, 78}}, a->name), ast::StorageClass::kStorage,
	Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(r()->error(),
	"56:78 error: using f16 types in 'storage' storage class is not "
	"implemented yet");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferVectorF16_TemporallyBan) {
	// var<storage> g : vec4<f16>;
	Enable(ast::Extension::kF16);
	GlobalVar("g", ty.vec(Source{{56, 78}}, ty.Of<f16>(), 4u), ast::StorageClass::kStorage,
	Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(r()->error(),
	"56:78 error: using f16 types in 'storage' storage class is not "
	"implemented yet");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferArrayF16_TemporallyBan) {
	// struct S { a : f16 };
	// var<storage, read> g : array<S, 3u>;
	Enable(ast::Extension::kF16);

	auto* s = Structure("S", utils::Vector{Member("a", ty.f16(Source{{56, 78}}))});
	auto* a = ty.array(ty.Of(s), 3_u);
	GlobalVar("g", a, ast::StorageClass::kStorage, ast::Access::kRead, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("56:78 error: using f16 types in 'storage' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferStructF16_TemporallyBan) {
	// struct S { x : f16 };
	// var<storage, read> g : S;
	Enable(ast::Extension::kF16);

	auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
	GlobalVar("g", ty.Of(s), ast::StorageClass::kStorage, ast::Access::kRead, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'storage' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferNoErrorStructF16Aliases_TemporallyBan) {
	// struct S { x : f16 };
	// type a1 = S;
	// var<storage, read> g : a1;
	Enable(ast::Extension::kF16);

	auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
	auto* a1 = Alias("a1", ty.Of(s));
	auto* a2 = Alias("a2", ty.Of(a1));
	GlobalVar("g", ty.Of(a2), ast::StorageClass::kStorage, ast::Access::kRead, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'storage' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferPointer) {
	// var<storage> g : ptr<private, f32>;
	GlobalVar(Source{{56, 78}}, "g", ty.pointer(ty.f32(), ast::StorageClass::kPrivate),
	ast::StorageClass::kStorage, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'ptr<private, f32, read_write>' cannot be used in storage class 'storage' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferIntScalar) {
	// var<storage> g : i32;
	GlobalVar(Source{{56, 78}}, "g", ty.i32(), ast::StorageClass::kStorage, Binding(0_a),
	Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferVectorF32) {
	// var<storage> g : vec4<f32>;
	GlobalVar(Source{{56, 78}}, "g", ty.vec4<f32>(), ast::StorageClass::kStorage, Binding(0_a),
	Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferArrayF32) {
	// var<storage, read> g : array<S, 3u>;
	auto* s = Structure("S", utils::Vector{Member("a", ty.f32())});
	auto* a = ty.array(ty.Of(s), 3_u);
	GlobalVar(Source{{56, 78}}, "g", a, ast::StorageClass::kStorage, ast::Access::kRead,
	Binding(0_a), Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, NotStorage_AccessMode) {
	// var<private, read> g : a;
	GlobalVar(Source{{56, 78}}, "g", ty.i32(), ast::StorageClass::kPrivate, ast::Access::kRead);

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: only variables in <storage> storage class may declare an access mode)");
	}

	TEST_F(ResolverStorageClassValidationTest, Storage_ReadAccessMode) {
	// @group(0) @binding(0) var<storage, read> a : i32;
	GlobalVar(Source{{56, 78}}, "a", ty.i32(), ast::StorageClass::kStorage, ast::Access::kRead,
	Group(0_a), Binding(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, Storage_ReadWriteAccessMode) {
	// @group(0) @binding(0) var<storage, read_write> a : i32;
	GlobalVar(Source{{56, 78}}, "a", ty.i32(), ast::StorageClass::kStorage, ast::Access::kReadWrite,
	Group(0_a), Binding(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, Storage_WriteAccessMode) {
	// @group(0) @binding(0) var<storage, read_write> a : i32;
	GlobalVar(Source{{56, 78}}, "a", ty.i32(), ast::StorageClass::kStorage, ast::Access::kWrite,
	Group(0_a), Binding(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(r()->error(),
	R"(56:78 error: access mode 'write' is not valid for the 'storage' address space)");
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferStructI32) {
	// struct S { x : i32 };
	// var<storage, read> g : S;
	auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
	GlobalVar(Source{{56, 78}}, "g", ty.Of(s), ast::StorageClass::kStorage, ast::Access::kRead,
	Binding(0_a), Group(0_a));

	ASSERT_TRUE(r()->Resolve());
	}

	TEST_F(ResolverStorageClassValidationTest, StorageBufferNoErrorStructI32Aliases) {
	// struct S { x : i32 };
	// type a1 = S;
	// var<storage, read> g : a1;
	auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
	auto* a1 = Alias("a1", ty.Of(s));
	auto* a2 = Alias("a2", ty.Of(a1));
	GlobalVar(Source{{56, 78}}, "g", ty.Of(a2), ast::StorageClass::kStorage, ast::Access::kRead,
	Binding(0_a), Group(0_a));

	ASSERT_TRUE(r()->Resolve());
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBuffer_Struct_Runtime) {
	// struct S { m: array<f32>; };
	// @group(0) @binding(0) var<uniform, > svar : S;

	auto* s = Structure(Source{{12, 34}}, "S", utils::Vector{Member("m", ty.array<i32>())});

	GlobalVar(Source{{56, 78}}, "svar", ty.Of(s), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	R"(56:78 error: runtime-sized arrays can only be used in the <storage> storage class
	note: while analysing structure member S.m
	56:78 note: while instantiating 'var' svar)");
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferBool) {
	// var<uniform> g : bool;
	GlobalVar(Source{{56, 78}}, "g", ty.bool_(), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'bool' cannot be used in storage class 'uniform' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferBoolAlias) {
	// type a = bool;
	// var<uniform> g : a;
	auto* a = Alias("a", ty.bool_());
	GlobalVar(Source{{56, 78}}, "g", ty.Of(a), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'bool' cannot be used in storage class 'uniform' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	// F16 types in storage and uniform buffer is not implemented yet.
	// TODO(tint:1473, tint:1502): make these testcases valid after f16 is supported.
	TEST_F(ResolverStorageClassValidationTest, UniformBufferF16_TemporallyBan) {
	// var<uniform> g : f16;
	Enable(ast::Extension::kF16);

	GlobalVar("g", ty.f16(Source{{56, 78}}), ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(r()->error(),
	"56:78 error: using f16 types in 'uniform' storage class is not "
	"implemented yet");
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferF16Alias_TemporallyBan) {
	// type a = f16;
	// var<uniform> g : a;
	Enable(ast::Extension::kF16);

	auto* a = Alias("a", ty.f16());
	GlobalVar("g", ty.type_name(Source{{56, 78}}, a->name), ast::StorageClass::kUniform,
	Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(r()->error(),
	"56:78 error: using f16 types in 'uniform' storage class is not "
	"implemented yet");
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferVectorF16_TemporallyBan) {
	// var<uniform> g : vec4<f16>;
	Enable(ast::Extension::kF16);
	GlobalVar("g", ty.vec(Source{{56, 78}}, ty.Of<f16>(), 4u), ast::StorageClass::kUniform,
	Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("56:78 error: using f16 types in 'uniform' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferArrayF16_TemporallyBan) {
	// struct S {
	// @size(16) f : f16;
	// }
	// var<uniform> g : array<S, 3u>;
	Enable(ast::Extension::kF16);

	auto* s = Structure(
	"S", utils::Vector{Member("a", ty.f16(Source{{56, 78}}), utils::Vector{MemberSize(16_a)})});
	auto* a = ty.array(ty.Of(s), 3_u);
	GlobalVar("g", a, ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("56:78 error: using f16 types in 'uniform' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferStructF16_TemporallyBan) {
	// struct S { x : f16 };
	// var<uniform> g : S;
	Enable(ast::Extension::kF16);

	auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
	GlobalVar("g", ty.Of(s), ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'uniform' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferStructF16Aliases_TemporallyBan) {
	// struct S { x : f16 };
	// type a1 = S;
	// var<uniform> g : a1;
	Enable(ast::Extension::kF16);

	auto* s = Structure("S", utils::Vector{Member("x", ty.f16(Source{{12, 34}}))});
	auto* a1 = Alias("a1", ty.Of(s));
	GlobalVar("g", ty.Of(a1), ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_THAT(r()->error(), HasSubstr("12:34 error: using f16 types in 'uniform' storage "
	"class is not implemented yet"));
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferPointer) {
	// var<uniform> g : ptr<private, f32>;
	GlobalVar(Source{{56, 78}}, "g", ty.pointer(ty.f32(), ast::StorageClass::kPrivate),
	ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

	ASSERT_FALSE(r()->Resolve());

	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'ptr<private, f32, read_write>' cannot be used in storage class 'uniform' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferIntScalar) {
	// var<uniform> g : i32;
	GlobalVar(Source{{56, 78}}, "g", ty.i32(), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferVectorF32) {
	// var<uniform> g : vec4<f32>;
	GlobalVar(Source{{56, 78}}, "g", ty.vec4<f32>(), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferArrayF32) {
	// struct S {
	// @size(16) f : f32;
	// }
	// var<uniform> g : array<S, 3u>;
	auto* s = Structure("S", utils::Vector{Member("a", ty.f32(), utils::Vector{MemberSize(16_a)})});
	auto* a = ty.array(ty.Of(s), 3_u);
	GlobalVar(Source{{56, 78}}, "g", a, ast::StorageClass::kUniform, Binding(0_a), Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferStructI32) {
	// struct S { x : i32 };
	// var<uniform> g : S;
	auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
	GlobalVar(Source{{56, 78}}, "g", ty.Of(s), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, UniformBufferStructI32Aliases) {
	// struct S { x : i32 };
	// type a1 = S;
	// var<uniform> g : a1;
	auto* s = Structure("S", utils::Vector{Member(Source{{12, 34}}, "x", ty.i32())});
	auto* a1 = Alias("a1", ty.Of(s));
	GlobalVar(Source{{56, 78}}, "g", ty.Of(a1), ast::StorageClass::kUniform, Binding(0_a),
	Group(0_a));

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantBool) {
	// enable chromium_experimental_push_constant;
	// var<push_constant> g : bool;
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	GlobalVar(Source{{56, 78}}, "g", ty.bool_(), ast::StorageClass::kPushConstant);

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'bool' cannot be used in storage class 'push_constant' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantF16) {
	// enable chromium_experimental_push_constant;
	// enable f16;
	// var<push_constant> g : f16;
	Enable(ast::Extension::kF16);
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	GlobalVar("g", ty.f16(Source{{56, 78}}), ast::StorageClass::kPushConstant);

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(),
	"56:78 error: using f16 types in 'push_constant' storage class is not "
	"implemented yet");
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantPointer) {
	// enable chromium_experimental_push_constant;
	// var<push_constant> g : ptr<private, f32>;
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	GlobalVar(Source{{56, 78}}, "g", ty.pointer(ty.f32(), ast::StorageClass::kPrivate),
	ast::StorageClass::kPushConstant);

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(56:78 error: Type 'ptr<private, f32, read_write>' cannot be used in storage class 'push_constant' as it is non-host-shareable
	56:78 note: while instantiating 'var' g)");
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantIntScalar) {
	// enable chromium_experimental_push_constant;
	// var<push_constant> g : i32;
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	GlobalVar("g", ty.i32(), ast::StorageClass::kPushConstant);

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantVectorF32) {
	// enable chromium_experimental_push_constant;
	// var<push_constant> g : vec4<f32>;
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	GlobalVar("g", ty.vec4<f32>(), ast::StorageClass::kPushConstant);

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantArrayF32) {
	// enable chromium_experimental_push_constant;
	// struct S { a : f32}
	// var<push_constant> g : array<S, 3u>;
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	auto* s = Structure("S", utils::Vector{Member("a", ty.f32())});
	auto* a = ty.array(ty.Of(s), 3_u);
	GlobalVar("g", a, ast::StorageClass::kPushConstant);

	ASSERT_TRUE(r()->Resolve()) << r()->error();
	}

	TEST_F(ResolverStorageClassValidationTest, PushConstantWithInitializer) {
	// enable chromium_experimental_push_constant;
	// var<push_constant> a : u32 = 0u;
	Enable(ast::Extension::kChromiumExperimentalPushConstant);
	GlobalVar(Source{{1u, 2u}}, "a", ty.u32(), ast::StorageClass::kPushConstant,
	Expr(Source{{3u, 4u}}, u32(0)));

	ASSERT_FALSE(r()->Resolve());
	EXPECT_EQ(
	r()->error(),
	R"(1:2 error: var of storage class 'push_constant' cannot have an initializer. var initializers are only supported for the storage classes 'private' and 'function')");
	}

	} // namespace
	} // namespace tint::resolver