src/tint/lang/wgsl/resolver/array_accessor_test.cc - tint - Git at Google

 // Copyright 2021 The Dawn & Tint Authors
 //
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are met:
 //
 // 1. Redistributions of source code must retain the above copyright notice, this
 //    list of conditions and the following disclaimer.
 //
 // 2. Redistributions in binary form must reproduce the above copyright notice,
 //    this list of conditions and the following disclaimer in the documentation
 //    and/or other materials provided with the distribution.
 //
 // 3. Neither the name of the copyright holder nor the names of its
 //    contributors may be used to endorse or promote products derived from
 //    this software without specific prior written permission.
 //
 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

 #include "gtest/gtest.h"
 #include "src/tint/lang/core/fluent_types.h"
 #include "src/tint/lang/wgsl/resolver/resolver_helper_test.h"
 #include "src/tint/lang/wgsl/sem/index_accessor_expression.h"

 using namespace tint::core::fluent_types;     // NOLINT
 using namespace tint::core::number_suffixes;  // NOLINT

 namespace tint::resolver {
 namespace {

 using ResolverIndexAccessorTest = ResolverTest;

 TEST_F(ResolverIndexAccessorTest, Matrix_F32) {
     GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);
     auto* acc = IndexAccessor("my_var", Expr(Source{{12, 34}}, 1_f));
     WrapInFunction(acc);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(), "12:34 error: index must be of type 'i32' or 'u32', found: 'f32'");
 }

 TEST_F(ResolverIndexAccessorTest, Matrix_Dynamic_Ref) {
     GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);
     auto* idx = Var("idx", ty.i32(), Call<i32>());
     auto* acc = IndexAccessor("my_var", idx);
     WrapInFunction(Decl(idx), acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Matrix_BothDimensions_Dynamic_Ref) {
     GlobalVar("my_var", ty.mat4x4<f32>(), core::AddressSpace::kPrivate);
     auto* idx = Var("idx", ty.u32(), Expr(3_u));
     auto* idy = Var("idy", ty.u32(), Expr(2_u));
     auto* acc = IndexAccessor(IndexAccessor("my_var", idx), idy);
     WrapInFunction(Decl(idx), Decl(idy), acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Matrix_Dynamic) {
     GlobalConst("my_const", ty.mat2x3<f32>(), Call<mat2x3<f32>>());
     auto* idx = Var("idx", ty.i32(), Call<i32>());
     auto* acc = IndexAccessor("my_const", idx);
     WrapInFunction(Decl(idx), acc);

     EXPECT_TRUE(r()->Resolve());
     EXPECT_EQ(r()->error(), "");

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Matrix_XDimension_Dynamic) {
     GlobalConst("my_const", ty.mat4x4<f32>(), Call<mat4x4<f32>>());
     auto* idx = Var("idx", ty.u32(), Expr(3_u));
     auto* acc = IndexAccessor("my_const", idx);
     WrapInFunction(Decl(idx), acc);

     EXPECT_TRUE(r()->Resolve());
     EXPECT_EQ(r()->error(), "");
 }

 TEST_F(ResolverIndexAccessorTest, Matrix_BothDimension_Dynamic) {
     GlobalConst("my_const", ty.mat4x4<f32>(), Call<mat4x4<f32>>());
     auto* idx = Var("idx", ty.u32(), Expr(3_u));
     auto* idy = Var("idy", ty.u32(), Expr(2_u));
     auto* acc = IndexAccessor(IndexAccessor("my_const", idx), idy);
     WrapInFunction(Decl(idx), Decl(idy), acc);

     EXPECT_TRUE(r()->Resolve());
     EXPECT_EQ(r()->error(), "");
 }

 TEST_F(ResolverIndexAccessorTest, Matrix) {
     GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);

     auto* acc = IndexAccessor("my_var", 1_i);
     WrapInFunction(acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     ASSERT_NE(TypeOf(acc), nullptr);
     ASSERT_TRUE(TypeOf(acc)->Is<core::type::Vector>());
     EXPECT_EQ(TypeOf(acc)->As<core::type::Vector>()->Width(), 3u);

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Matrix_BothDimensions) {
     GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);

     auto* acc = IndexAccessor(IndexAccessor("my_var", 0_i), 1_i);
     WrapInFunction(acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     ASSERT_NE(TypeOf(acc), nullptr);
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Vector_F32) {
     GlobalVar("my_var", ty.vec3<f32>(), core::AddressSpace::kPrivate);
     auto* acc = IndexAccessor("my_var", Expr(Source{{12, 34}}, 2_f));
     WrapInFunction(acc);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(), "12:34 error: index must be of type 'i32' or 'u32', found: 'f32'");
 }

 TEST_F(ResolverIndexAccessorTest, Vector_Dynamic_Ref) {
     GlobalVar("my_var", ty.vec3<f32>(), core::AddressSpace::kPrivate);
     auto* idx = Var("idx", ty.i32(), Expr(2_i));
     auto* acc = IndexAccessor("my_var", idx);
     WrapInFunction(Decl(idx), acc);

     EXPECT_TRUE(r()->Resolve());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Vector_Dynamic) {
     GlobalConst("my_const", ty.vec3<f32>(), Call<vec3<f32>>());
     auto* idx = Var("idx", ty.i32(), Expr(2_i));
     auto* acc = IndexAccessor("my_const", idx);
     WrapInFunction(Decl(idx), acc);

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

 TEST_F(ResolverIndexAccessorTest, Vector) {
     GlobalConst("my_const", ty.vec3<f32>(), Call<vec3<f32>>());

     auto* acc = IndexAccessor("my_const", 2_i);
     WrapInFunction(acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     ASSERT_NE(TypeOf(acc), nullptr);
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Array_Literal_i32) {
     GlobalVar("my_var", ty.array<f32, 3>(), core::AddressSpace::kPrivate);
     auto* acc = IndexAccessor("my_var", 2_i);
     WrapInFunction(acc);
     EXPECT_TRUE(r()->Resolve()) << r()->error();
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Array_Literal_u32) {
     GlobalVar("my_var", ty.array<f32, 3>(), core::AddressSpace::kPrivate);
     auto* acc = IndexAccessor("my_var", 2_u);
     WrapInFunction(acc);
     EXPECT_TRUE(r()->Resolve()) << r()->error();
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Array_Literal_AInt) {
     GlobalVar("my_var", ty.array<f32, 3>(), core::AddressSpace::kPrivate);
     auto* acc = IndexAccessor("my_var", 2_a);
     WrapInFunction(acc);
     EXPECT_TRUE(r()->Resolve()) << r()->error();
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Alias_Array) {
     auto* aary = Alias("myarrty", ty.array<f32, 3>());

     GlobalVar("my_var", ty.Of(aary), core::AddressSpace::kPrivate);

     auto* acc = IndexAccessor("my_var", 2_i);
     WrapInFunction(acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     ASSERT_NE(TypeOf(acc), nullptr);
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Array_Constant) {
     GlobalConst("my_const", ty.array<f32, 3>(), Call<array<f32, 3>>());

     auto* acc = IndexAccessor("my_const", 2_i);
     WrapInFunction(acc);

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     ASSERT_NE(TypeOf(acc), nullptr);
     EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());
 }

 TEST_F(ResolverIndexAccessorTest, Array_Dynamic_I32) {
     // let a : array<f32, 3> = 0;
     // var idx : i32 = 0;
     // var f : f32 = a[idx];
     auto* a = Let("a", ty.array<f32, 3>(), Call<array<f32, 3>>());
     auto* idx = Var("idx", ty.i32(), Call<i32>());
     auto* acc = IndexAccessor("a", Expr(Source{{12, 34}}, idx));
     auto* f = Var("f", ty.f32(), acc);
     Func("my_func", tint::Empty, ty.void_(),
          Vector{
              Decl(a),
              Decl(idx),
              Decl(f),
          });

     EXPECT_TRUE(r()->Resolve());
     EXPECT_EQ(r()->error(), "");

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Array_Literal_F32) {
     // let a : array<f32, 3>;
     // var f : f32 = a[2.0f];
     auto* a = Let("a", ty.array<f32, 3>(), Call<array<f32, 3>>());
     auto* f = Var("a_2", ty.f32(), IndexAccessor("a", Expr(Source{{12, 34}}, 2_f)));
     Func("my_func", tint::Empty, ty.void_(),
          Vector{
              Decl(a),
              Decl(f),
          });
     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(), "12:34 error: index must be of type 'i32' or 'u32', found: 'f32'");
 }

 TEST_F(ResolverIndexAccessorTest, Array_Literal_I32) {
     // let a : array<f32, 3>;
     // var f : f32 = a[2i];
     auto* a = Let("a", ty.array<f32, 3>(), Call<array<f32, 3>>());
     auto* acc = IndexAccessor("a", 2_i);
     auto* f = Var("a_2", ty.f32(), acc);
     Func("my_func", tint::Empty, ty.void_(),
          Vector{
              Decl(a),
              Decl(f),
          });
     EXPECT_TRUE(r()->Resolve()) << r()->error();

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Expr_Deref_FuncGoodParent) {
     // fn func(p: ptr<function, vec4<f32>>) -> f32 {
     //     let idx: u32 = u32();
     //     let x: f32 = (*p)[idx];
     //     return x;
     // }
     auto* p = Param("p", ty.ptr<function, vec4<f32>>());
     auto* idx = Let("idx", ty.u32(), Call<u32>());
     auto* star_p = Deref(p);
     auto* acc = IndexAccessor(Source{{12, 34}}, star_p, idx);
     auto* x = Var("x", ty.f32(), acc);
     Func("func", Vector{p}, ty.f32(), Vector{Decl(idx), Decl(x), Return(x)});

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Expr_ImplicitDeref_FuncGoodParent) {
     // fn func(p: ptr<function, vec4<f32>>) -> f32 {
     //     let idx: u32 = u32();
     //     let x: f32 = p[idx];
     //     return x;
     // }
     auto* p = Param("p", ty.ptr<function, vec4<f32>>());
     auto* idx = Let("idx", ty.u32(), Call<u32>());
     auto* acc = IndexAccessor(Source{{12, 34}}, p, idx);
     auto* x = Var("x", ty.f32(), acc);
     Func("func", Vector{p}, ty.f32(), Vector{Decl(idx), Decl(x), Return(x)});

     EXPECT_TRUE(r()->Resolve()) << r()->error();

     auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
     ASSERT_NE(idx_sem, nullptr);
     EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
     EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
 }

 TEST_F(ResolverIndexAccessorTest, Expr_Deref_FuncBadParent) {
     // fn func(p: ptr<function, vec4<f32>>) -> f32 {
     //     let idx: u32 = u32();
     //     let x: f32 = *p[idx];
     //     return x;
     // }
     auto* p = Param("p", ty.ptr<function, vec4<f32>>());
     auto* idx = Let("idx", ty.u32(), Call<u32>());
     auto* accessor_expr = IndexAccessor(Source{{12, 34}}, p, idx);
     auto* star_p = Deref(accessor_expr);
     auto* x = Var("x", ty.f32(), star_p);
     Func("func", Vector{p}, ty.f32(), Vector{Decl(idx), Decl(x), Return(x)});

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(), "12:34 error: cannot dereference expression of type 'f32'");
 }

 TEST_F(ResolverIndexAccessorTest, Expr_Deref_BadParent) {
     // var param: vec4<f32>
     // let x: f32 = *(&param)[0];
     auto* param = Var("param", ty.vec4<f32>());
     auto* idx = Var("idx", ty.u32(), Call<u32>());
     auto* addressOf_expr = AddressOf(param);
     auto* accessor_expr = IndexAccessor(Source{{12, 34}}, addressOf_expr, idx);
     auto* star_p = Deref(accessor_expr);
     auto* x = Var("x", ty.f32(), star_p);
     WrapInFunction(param, idx, x);

     EXPECT_FALSE(r()->Resolve());
     EXPECT_EQ(r()->error(), "12:34 error: cannot dereference expression of type 'f32'");
 }

 }  // namespace
 }  // namespace tint::resolver
	// Copyright 2021 The Dawn & Tint Authors
	//
	// Redistribution and use in source and binary forms, with or without
	// modification, are permitted provided that the following conditions are met:
	//
	// 1. Redistributions of source code must retain the above copyright notice, this
	// list of conditions and the following disclaimer.
	//
	// 2. Redistributions in binary form must reproduce the above copyright notice,
	// this list of conditions and the following disclaimer in the documentation
	// and/or other materials provided with the distribution.
	//
	// 3. Neither the name of the copyright holder nor the names of its
	// contributors may be used to endorse or promote products derived from
	// this software without specific prior written permission.
	//
	// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
	// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
	// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	// OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

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

	#include "gtest/gtest.h"
	#include "src/tint/lang/core/fluent_types.h"
	#include "src/tint/lang/wgsl/resolver/resolver_helper_test.h"
	#include "src/tint/lang/wgsl/sem/index_accessor_expression.h"

	using namespace tint::core::fluent_types; // NOLINT
	using namespace tint::core::number_suffixes; // NOLINT

	namespace tint::resolver {
	namespace {

	using ResolverIndexAccessorTest = ResolverTest;

	TEST_F(ResolverIndexAccessorTest, Matrix_F32) {
	GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);
	auto* acc = IndexAccessor("my_var", Expr(Source{{12, 34}}, 1_f));
	WrapInFunction(acc);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(), "12:34 error: index must be of type 'i32' or 'u32', found: 'f32'");
	}

	TEST_F(ResolverIndexAccessorTest, Matrix_Dynamic_Ref) {
	GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);
	auto* idx = Var("idx", ty.i32(), Call<i32>());
	auto* acc = IndexAccessor("my_var", idx);
	WrapInFunction(Decl(idx), acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Matrix_BothDimensions_Dynamic_Ref) {
	GlobalVar("my_var", ty.mat4x4<f32>(), core::AddressSpace::kPrivate);
	auto* idx = Var("idx", ty.u32(), Expr(3_u));
	auto* idy = Var("idy", ty.u32(), Expr(2_u));
	auto* acc = IndexAccessor(IndexAccessor("my_var", idx), idy);
	WrapInFunction(Decl(idx), Decl(idy), acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Matrix_Dynamic) {
	GlobalConst("my_const", ty.mat2x3<f32>(), Call<mat2x3<f32>>());
	auto* idx = Var("idx", ty.i32(), Call<i32>());
	auto* acc = IndexAccessor("my_const", idx);
	WrapInFunction(Decl(idx), acc);

	EXPECT_TRUE(r()->Resolve());
	EXPECT_EQ(r()->error(), "");

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Matrix_XDimension_Dynamic) {
	GlobalConst("my_const", ty.mat4x4<f32>(), Call<mat4x4<f32>>());
	auto* idx = Var("idx", ty.u32(), Expr(3_u));
	auto* acc = IndexAccessor("my_const", idx);
	WrapInFunction(Decl(idx), acc);

	EXPECT_TRUE(r()->Resolve());
	EXPECT_EQ(r()->error(), "");
	}

	TEST_F(ResolverIndexAccessorTest, Matrix_BothDimension_Dynamic) {
	GlobalConst("my_const", ty.mat4x4<f32>(), Call<mat4x4<f32>>());
	auto* idx = Var("idx", ty.u32(), Expr(3_u));
	auto* idy = Var("idy", ty.u32(), Expr(2_u));
	auto* acc = IndexAccessor(IndexAccessor("my_const", idx), idy);
	WrapInFunction(Decl(idx), Decl(idy), acc);

	EXPECT_TRUE(r()->Resolve());
	EXPECT_EQ(r()->error(), "");
	}

	TEST_F(ResolverIndexAccessorTest, Matrix) {
	GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);

	auto* acc = IndexAccessor("my_var", 1_i);
	WrapInFunction(acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	ASSERT_NE(TypeOf(acc), nullptr);
	ASSERT_TRUE(TypeOf(acc)->Is<core::type::Vector>());
	EXPECT_EQ(TypeOf(acc)->As<core::type::Vector>()->Width(), 3u);

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Matrix_BothDimensions) {
	GlobalVar("my_var", ty.mat2x3<f32>(), core::AddressSpace::kPrivate);

	auto* acc = IndexAccessor(IndexAccessor("my_var", 0_i), 1_i);
	WrapInFunction(acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	ASSERT_NE(TypeOf(acc), nullptr);
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Vector_F32) {
	GlobalVar("my_var", ty.vec3<f32>(), core::AddressSpace::kPrivate);
	auto* acc = IndexAccessor("my_var", Expr(Source{{12, 34}}, 2_f));
	WrapInFunction(acc);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(), "12:34 error: index must be of type 'i32' or 'u32', found: 'f32'");
	}

	TEST_F(ResolverIndexAccessorTest, Vector_Dynamic_Ref) {
	GlobalVar("my_var", ty.vec3<f32>(), core::AddressSpace::kPrivate);
	auto* idx = Var("idx", ty.i32(), Expr(2_i));
	auto* acc = IndexAccessor("my_var", idx);
	WrapInFunction(Decl(idx), acc);

	EXPECT_TRUE(r()->Resolve());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Vector_Dynamic) {
	GlobalConst("my_const", ty.vec3<f32>(), Call<vec3<f32>>());
	auto* idx = Var("idx", ty.i32(), Expr(2_i));
	auto* acc = IndexAccessor("my_const", idx);
	WrapInFunction(Decl(idx), acc);

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

	TEST_F(ResolverIndexAccessorTest, Vector) {
	GlobalConst("my_const", ty.vec3<f32>(), Call<vec3<f32>>());

	auto* acc = IndexAccessor("my_const", 2_i);
	WrapInFunction(acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	ASSERT_NE(TypeOf(acc), nullptr);
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Array_Literal_i32) {
	GlobalVar("my_var", ty.array<f32, 3>(), core::AddressSpace::kPrivate);
	auto* acc = IndexAccessor("my_var", 2_i);
	WrapInFunction(acc);
	EXPECT_TRUE(r()->Resolve()) << r()->error();
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Array_Literal_u32) {
	GlobalVar("my_var", ty.array<f32, 3>(), core::AddressSpace::kPrivate);
	auto* acc = IndexAccessor("my_var", 2_u);
	WrapInFunction(acc);
	EXPECT_TRUE(r()->Resolve()) << r()->error();
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Array_Literal_AInt) {
	GlobalVar("my_var", ty.array<f32, 3>(), core::AddressSpace::kPrivate);
	auto* acc = IndexAccessor("my_var", 2_a);
	WrapInFunction(acc);
	EXPECT_TRUE(r()->Resolve()) << r()->error();
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Alias_Array) {
	auto* aary = Alias("myarrty", ty.array<f32, 3>());

	GlobalVar("my_var", ty.Of(aary), core::AddressSpace::kPrivate);

	auto* acc = IndexAccessor("my_var", 2_i);
	WrapInFunction(acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	ASSERT_NE(TypeOf(acc), nullptr);
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Array_Constant) {
	GlobalConst("my_const", ty.array<f32, 3>(), Call<array<f32, 3>>());

	auto* acc = IndexAccessor("my_const", 2_i);
	WrapInFunction(acc);

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	ASSERT_NE(TypeOf(acc), nullptr);
	EXPECT_TRUE(TypeOf(acc)->Is<core::type::F32>());
	}

	TEST_F(ResolverIndexAccessorTest, Array_Dynamic_I32) {
	// let a : array<f32, 3> = 0;
	// var idx : i32 = 0;
	// var f : f32 = a[idx];
	auto* a = Let("a", ty.array<f32, 3>(), Call<array<f32, 3>>());
	auto* idx = Var("idx", ty.i32(), Call<i32>());
	auto* acc = IndexAccessor("a", Expr(Source{{12, 34}}, idx));
	auto* f = Var("f", ty.f32(), acc);
	Func("my_func", tint::Empty, ty.void_(),
	Vector{
	Decl(a),
	Decl(idx),
	Decl(f),
	});

	EXPECT_TRUE(r()->Resolve());
	EXPECT_EQ(r()->error(), "");

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Array_Literal_F32) {
	// let a : array<f32, 3>;
	// var f : f32 = a[2.0f];
	auto* a = Let("a", ty.array<f32, 3>(), Call<array<f32, 3>>());
	auto* f = Var("a_2", ty.f32(), IndexAccessor("a", Expr(Source{{12, 34}}, 2_f)));
	Func("my_func", tint::Empty, ty.void_(),
	Vector{
	Decl(a),
	Decl(f),
	});
	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(), "12:34 error: index must be of type 'i32' or 'u32', found: 'f32'");
	}

	TEST_F(ResolverIndexAccessorTest, Array_Literal_I32) {
	// let a : array<f32, 3>;
	// var f : f32 = a[2i];
	auto* a = Let("a", ty.array<f32, 3>(), Call<array<f32, 3>>());
	auto* acc = IndexAccessor("a", 2_i);
	auto* f = Var("a_2", ty.f32(), acc);
	Func("my_func", tint::Empty, ty.void_(),
	Vector{
	Decl(a),
	Decl(f),
	});
	EXPECT_TRUE(r()->Resolve()) << r()->error();

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Expr_Deref_FuncGoodParent) {
	// fn func(p: ptr<function, vec4<f32>>) -> f32 {
	// let idx: u32 = u32();
	// let x: f32 = (*p)[idx];
	// return x;
	// }
	auto* p = Param("p", ty.ptr<function, vec4<f32>>());
	auto* idx = Let("idx", ty.u32(), Call<u32>());
	auto* star_p = Deref(p);
	auto* acc = IndexAccessor(Source{{12, 34}}, star_p, idx);
	auto* x = Var("x", ty.f32(), acc);
	Func("func", Vector{p}, ty.f32(), Vector{Decl(idx), Decl(x), Return(x)});

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Expr_ImplicitDeref_FuncGoodParent) {
	// fn func(p: ptr<function, vec4<f32>>) -> f32 {
	// let idx: u32 = u32();
	// let x: f32 = p[idx];
	// return x;
	// }
	auto* p = Param("p", ty.ptr<function, vec4<f32>>());
	auto* idx = Let("idx", ty.u32(), Call<u32>());
	auto* acc = IndexAccessor(Source{{12, 34}}, p, idx);
	auto* x = Var("x", ty.f32(), acc);
	Func("func", Vector{p}, ty.f32(), Vector{Decl(idx), Decl(x), Return(x)});

	EXPECT_TRUE(r()->Resolve()) << r()->error();

	auto idx_sem = Sem().Get(acc)->UnwrapLoad()->As<sem::IndexAccessorExpression>();
	ASSERT_NE(idx_sem, nullptr);
	EXPECT_EQ(idx_sem->Index()->Declaration(), acc->index);
	EXPECT_EQ(idx_sem->Object()->Declaration(), acc->object);
	}

	TEST_F(ResolverIndexAccessorTest, Expr_Deref_FuncBadParent) {
	// fn func(p: ptr<function, vec4<f32>>) -> f32 {
	// let idx: u32 = u32();
	// let x: f32 = *p[idx];
	// return x;
	// }
	auto* p = Param("p", ty.ptr<function, vec4<f32>>());
	auto* idx = Let("idx", ty.u32(), Call<u32>());
	auto* accessor_expr = IndexAccessor(Source{{12, 34}}, p, idx);
	auto* star_p = Deref(accessor_expr);
	auto* x = Var("x", ty.f32(), star_p);
	Func("func", Vector{p}, ty.f32(), Vector{Decl(idx), Decl(x), Return(x)});

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(), "12:34 error: cannot dereference expression of type 'f32'");
	}

	TEST_F(ResolverIndexAccessorTest, Expr_Deref_BadParent) {
	// var param: vec4<f32>
	// let x: f32 = *(&param)[0];
	auto* param = Var("param", ty.vec4<f32>());
	auto* idx = Var("idx", ty.u32(), Call<u32>());
	auto* addressOf_expr = AddressOf(param);
	auto* accessor_expr = IndexAccessor(Source{{12, 34}}, addressOf_expr, idx);
	auto* star_p = Deref(accessor_expr);
	auto* x = Var("x", ty.f32(), star_p);
	WrapInFunction(param, idx, x);

	EXPECT_FALSE(r()->Resolve());
	EXPECT_EQ(r()->error(), "12:34 error: cannot dereference expression of type 'f32'");
	}

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