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// 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.
#ifndef SRC_TINT_RESOLVER_RESOLVER_TEST_HELPER_H_
#define SRC_TINT_RESOLVER_RESOLVER_TEST_HELPER_H_
#include <functional>
#include <memory>
#include <ostream>
#include <string>
#include <tuple>
#include <utility>
#include <variant>
#include "gtest/gtest.h"
#include "src/tint/program_builder.h"
#include "src/tint/resolver/resolver.h"
#include "src/tint/sem/abstract_float.h"
#include "src/tint/sem/abstract_int.h"
#include "src/tint/sem/expression.h"
#include "src/tint/sem/statement.h"
#include "src/tint/sem/variable.h"
#include "src/tint/utils/vector.h"
namespace tint::resolver {
/// Helper class for testing
class TestHelper : public ProgramBuilder {
public:
/// Constructor
TestHelper();
/// Destructor
~TestHelper() override;
/// @return a pointer to the Resolver
Resolver* r() const { return resolver_.get(); }
/// @return a pointer to the validator
const Validator* v() const { return resolver_->GetValidatorForTesting(); }
/// Returns the statement that holds the given expression.
/// @param expr the ast::Expression
/// @return the ast::Statement of the ast::Expression, or nullptr if the
/// expression is not owned by a statement.
const ast::Statement* StmtOf(const ast::Expression* expr) {
auto* sem_stmt = Sem().Get(expr)->Stmt();
return sem_stmt ? sem_stmt->Declaration() : nullptr;
}
/// Returns the BlockStatement that holds the given statement.
/// @param stmt the ast::Statement
/// @return the ast::BlockStatement that holds the ast::Statement, or nullptr
/// if the statement is not owned by a BlockStatement.
const ast::BlockStatement* BlockOf(const ast::Statement* stmt) {
auto* sem_stmt = Sem().Get(stmt);
return sem_stmt ? sem_stmt->Block()->Declaration() : nullptr;
}
/// Returns the BlockStatement that holds the given expression.
/// @param expr the ast::Expression
/// @return the ast::Statement of the ast::Expression, or nullptr if the
/// expression is not indirectly owned by a BlockStatement.
const ast::BlockStatement* BlockOf(const ast::Expression* expr) {
auto* sem_stmt = Sem().Get(expr)->Stmt();
return sem_stmt ? sem_stmt->Block()->Declaration() : nullptr;
}
/// Returns the semantic variable for the given identifier expression.
/// @param expr the identifier expression
/// @return the resolved sem::Variable of the identifier, or nullptr if
/// the expression did not resolve to a variable.
const sem::Variable* VarOf(const ast::Expression* expr) {
auto* sem_ident = Sem().Get(expr);
auto* var_user = sem_ident ? sem_ident->As<sem::VariableUser>() : nullptr;
return var_user ? var_user->Variable() : nullptr;
}
/// Checks that all the users of the given variable are as expected
/// @param var the variable to check
/// @param expected_users the expected users of the variable
/// @return true if all users are as expected
bool CheckVarUsers(const ast::Variable* var,
utils::VectorRef<const ast::Expression*> expected_users) {
auto& var_users = Sem().Get(var)->Users();
if (var_users.size() != expected_users.Length()) {
return false;
}
for (size_t i = 0; i < var_users.size(); i++) {
if (var_users[i]->Declaration() != expected_users[i]) {
return false;
}
}
return true;
}
/// @param type a type
/// @returns the name for `type` that closely resembles how it would be
/// declared in WGSL.
std::string FriendlyName(const ast::Type* type) { return type->FriendlyName(Symbols()); }
/// @param type a type
/// @returns the name for `type` that closely resembles how it would be
/// declared in WGSL.
std::string FriendlyName(const sem::Type* type) { return type->FriendlyName(Symbols()); }
private:
std::unique_ptr<Resolver> resolver_;
};
class ResolverTest : public TestHelper, public testing::Test {};
template <typename T>
class ResolverTestWithParam : public TestHelper, public testing::TestWithParam<T> {};
namespace builder {
template <uint32_t N, typename T>
struct vec {};
template <typename T>
using vec2 = vec<2, T>;
template <typename T>
using vec3 = vec<3, T>;
template <typename T>
using vec4 = vec<4, T>;
template <uint32_t N, uint32_t M, typename T>
struct mat {};
template <typename T>
using mat2x2 = mat<2, 2, T>;
template <typename T>
using mat2x3 = mat<2, 3, T>;
template <typename T>
using mat3x2 = mat<3, 2, T>;
template <typename T>
using mat3x3 = mat<3, 3, T>;
template <typename T>
using mat4x4 = mat<4, 4, T>;
template <uint32_t N, typename T>
struct array {};
template <typename TO, int ID = 0>
struct alias {};
template <typename TO>
using alias1 = alias<TO, 1>;
template <typename TO>
using alias2 = alias<TO, 2>;
template <typename TO>
using alias3 = alias<TO, 3>;
template <typename TO>
struct ptr {};
/// Type used to accept scalars as arguments. Can be either a single value that gets splatted for
/// composite types, or all values required by the composite type.
struct ScalarArgs {
/// Constructor
ScalarArgs() = default;
/// Constructor
/// @param single_value single value to initialize with
template <typename T>
explicit ScalarArgs(T single_value) : values(utils::Vector<Storage, 1>{single_value}) {}
/// Constructor
/// @param all_values all values to initialize the composite type with
template <typename T>
ScalarArgs(utils::VectorRef<T> all_values) // NOLINT: implicit on purpose
{
for (auto& v : all_values) {
values.Push(v);
}
}
/// @param other the other ScalarArgs to compare against
/// @returns true if all values are equal to the values in @p other
bool operator==(const ScalarArgs& other) const { return values == other.values; }
/// Valid scalar types for args
using Storage = std::variant<i32, u32, f32, f16, AInt, AFloat, bool>;
/// The vector of values
utils::Vector<Storage, 16> values;
};
/// Returns current variant value in `s` cast to type `T`
template <typename T>
T As(ScalarArgs::Storage& s) {
return std::visit([](auto&& v) { return static_cast<T>(v); }, s);
}
/// @param o the std::ostream to write to
/// @param args the ScalarArgs
/// @return the std::ostream so calls can be chained
inline std::ostream& operator<<(std::ostream& o, const ScalarArgs& args) {
o << "[";
bool first = true;
for (auto& val : args.values) {
if (!first) {
o << ", ";
}
first = false;
std::visit([&](auto&& v) { o << v; }, val);
}
o << "]";
return o;
}
using ast_type_func_ptr = const ast::Type* (*)(ProgramBuilder& b);
using ast_expr_func_ptr = const ast::Expression* (*)(ProgramBuilder& b, ScalarArgs args);
using ast_expr_from_double_func_ptr = const ast::Expression* (*)(ProgramBuilder& b, double v);
using sem_type_func_ptr = const sem::Type* (*)(ProgramBuilder& b);
using type_name_func_ptr = std::string (*)();
template <typename T>
struct DataType {};
/// Helper that represents no-type. Returns nullptr for all static methods.
template <>
struct DataType<void> {
/// @return nullptr
static inline const ast::Type* AST(ProgramBuilder&) { return nullptr; }
/// @return nullptr
static inline const sem::Type* Sem(ProgramBuilder&) { return nullptr; }
};
/// Helper for building bool types and expressions
template <>
struct DataType<bool> {
/// The element type
using ElementType = bool;
/// false as bool is not a composite type
static constexpr bool is_composite = false;
/// @param b the ProgramBuilder
/// @return a new AST bool type
static inline const ast::Type* AST(ProgramBuilder& b) { return b.ty.bool_(); }
/// @param b the ProgramBuilder
/// @return the semantic bool type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::Bool>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the boolean value to init with
/// @return a new AST expression of the bool type
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<bool>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to bool.
/// @return a new AST expression of the bool type
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "bool"; }
};
/// Helper for building i32 types and expressions
template <>
struct DataType<i32> {
/// The element type
using ElementType = i32;
/// false as i32 is not a composite type
static constexpr bool is_composite = false;
/// @param b the ProgramBuilder
/// @return a new AST i32 type
static inline const ast::Type* AST(ProgramBuilder& b) { return b.ty.i32(); }
/// @param b the ProgramBuilder
/// @return the semantic i32 type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::I32>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the i32 value to init with
/// @return a new AST i32 literal value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<i32>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to i32.
/// @return a new AST i32 literal value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "i32"; }
};
/// Helper for building u32 types and expressions
template <>
struct DataType<u32> {
/// The element type
using ElementType = u32;
/// false as u32 is not a composite type
static constexpr bool is_composite = false;
/// @param b the ProgramBuilder
/// @return a new AST u32 type
static inline const ast::Type* AST(ProgramBuilder& b) { return b.ty.u32(); }
/// @param b the ProgramBuilder
/// @return the semantic u32 type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::U32>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the u32 value to init with
/// @return a new AST u32 literal value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<u32>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to u32.
/// @return a new AST u32 literal value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "u32"; }
};
/// Helper for building f32 types and expressions
template <>
struct DataType<f32> {
/// The element type
using ElementType = f32;
/// false as f32 is not a composite type
static constexpr bool is_composite = false;
/// @param b the ProgramBuilder
/// @return a new AST f32 type
static inline const ast::Type* AST(ProgramBuilder& b) { return b.ty.f32(); }
/// @param b the ProgramBuilder
/// @return the semantic f32 type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::F32>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the f32 value to init with
/// @return a new AST f32 literal value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<f32>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to f32.
/// @return a new AST f32 literal value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<f32>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "f32"; }
};
/// Helper for building f16 types and expressions
template <>
struct DataType<f16> {
/// The element type
using ElementType = f16;
/// false as f16 is not a composite type
static constexpr bool is_composite = false;
/// @param b the ProgramBuilder
/// @return a new AST f16 type
static inline const ast::Type* AST(ProgramBuilder& b) { return b.ty.f16(); }
/// @param b the ProgramBuilder
/// @return the semantic f16 type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::F16>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the f16 value to init with
/// @return a new AST f16 literal value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<f16>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to f16.
/// @return a new AST f16 literal value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "f16"; }
};
/// Helper for building abstract float types and expressions
template <>
struct DataType<AFloat> {
/// The element type
using ElementType = AFloat;
/// false as AFloat is not a composite type
static constexpr bool is_composite = false;
/// @returns nullptr, as abstract floats are un-typeable
static inline const ast::Type* AST(ProgramBuilder&) { return nullptr; }
/// @param b the ProgramBuilder
/// @return the semantic abstract-float type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::AbstractFloat>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the abstract-float value to init with
/// @return a new AST abstract-float literal value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<AFloat>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to AFloat.
/// @return a new AST abstract-float literal value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "abstract-float"; }
};
/// Helper for building abstract integer types and expressions
template <>
struct DataType<AInt> {
/// The element type
using ElementType = AInt;
/// false as AFloat is not a composite type
static constexpr bool is_composite = false;
/// @returns nullptr, as abstract integers are un-typeable
static inline const ast::Type* AST(ProgramBuilder&) { return nullptr; }
/// @param b the ProgramBuilder
/// @return the semantic abstract-int type
static inline const sem::Type* Sem(ProgramBuilder& b) { return b.create<sem::AbstractInt>(); }
/// @param b the ProgramBuilder
/// @param args args of size 1 with the abstract-int value to init with
/// @return a new AST abstract-int literal value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Expr(std::get<AInt>(args.values[0]));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to AInt.
/// @return a new AST abstract-int literal value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "abstract-int"; }
};
/// Helper for building vector types and expressions
template <uint32_t N, typename T>
struct DataType<vec<N, T>> {
/// The element type
using ElementType = T;
/// true as vectors are a composite type
static constexpr bool is_composite = true;
/// @param b the ProgramBuilder
/// @return a new AST vector type
static inline const ast::Type* AST(ProgramBuilder& b) {
return b.ty.vec(DataType<T>::AST(b), N);
}
/// @param b the ProgramBuilder
/// @return the semantic vector type
static inline const sem::Type* Sem(ProgramBuilder& b) {
return b.create<sem::Vector>(DataType<T>::Sem(b), N);
}
/// @param b the ProgramBuilder
/// @param args args of size 1 or N with values of type T to initialize with
/// @return a new AST vector value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Construct(AST(b), ExprArgs(b, std::move(args)));
}
/// @param b the ProgramBuilder
/// @param args args of size 1 or N with values of type T to initialize with
/// @return the list of expressions that are used to construct the vector
static inline auto ExprArgs(ProgramBuilder& b, ScalarArgs args) {
const bool one_value = args.values.Length() == 1;
utils::Vector<const ast::Expression*, N> r;
for (size_t i = 0; i < N; ++i) {
r.Push(DataType<T>::Expr(b, ScalarArgs{one_value ? args.values[0] : args.values[i]}));
}
return r;
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to ElementType
/// @return a new AST vector value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() {
return "vec" + std::to_string(N) + "<" + DataType<T>::Name() + ">";
}
};
/// Helper for building matrix types and expressions
template <uint32_t N, uint32_t M, typename T>
struct DataType<mat<N, M, T>> {
/// The element type
using ElementType = T;
/// true as matrices are a composite type
static constexpr bool is_composite = true;
/// @param b the ProgramBuilder
/// @return a new AST matrix type
static inline const ast::Type* AST(ProgramBuilder& b) {
return b.ty.mat(DataType<T>::AST(b), N, M);
}
/// @param b the ProgramBuilder
/// @return the semantic matrix type
static inline const sem::Type* Sem(ProgramBuilder& b) {
auto* column_type = b.create<sem::Vector>(DataType<T>::Sem(b), M);
return b.create<sem::Matrix>(column_type, N);
}
/// @param b the ProgramBuilder
/// @param args args of size 1 or N*M with values of type T to initialize with
/// @return a new AST matrix value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Construct(AST(b), ExprArgs(b, std::move(args)));
}
/// @param b the ProgramBuilder
/// @param args args of size 1 or N*M with values of type T to initialize with
/// @return a new AST matrix value expression
static inline auto ExprArgs(ProgramBuilder& b, ScalarArgs args) {
const bool one_value = args.values.Length() == 1;
size_t next = 0;
utils::Vector<const ast::Expression*, N> r;
for (uint32_t i = 0; i < N; ++i) {
if (one_value) {
r.Push(DataType<vec<M, T>>::Expr(b, ScalarArgs{args.values[0]}));
} else {
utils::Vector<T, M> v;
for (size_t j = 0; j < M; ++j) {
v.Push(std::get<T>(args.values[next++]));
}
r.Push(DataType<vec<M, T>>::Expr(b, utils::VectorRef<T>{v}));
}
}
return r;
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to ElementType
/// @return a new AST matrix value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() {
return "mat" + std::to_string(N) + "x" + std::to_string(M) + "<" + DataType<T>::Name() +
">";
}
};
/// Helper for building alias types and expressions
template <typename T, int ID>
struct DataType<alias<T, ID>> {
/// The element type
using ElementType = typename DataType<T>::ElementType;
/// true if the aliased type is a composite type
static constexpr bool is_composite = DataType<T>::is_composite;
/// @param b the ProgramBuilder
/// @return a new AST alias type
static inline const ast::Type* AST(ProgramBuilder& b) {
auto name = b.Symbols().Register("alias_" + std::to_string(ID));
if (!b.AST().LookupType(name)) {
auto* type = DataType<T>::AST(b);
b.AST().AddTypeDecl(b.ty.alias(name, type));
}
return b.create<ast::TypeName>(name);
}
/// @param b the ProgramBuilder
/// @return the semantic aliased type
static inline const sem::Type* Sem(ProgramBuilder& b) { return DataType<T>::Sem(b); }
/// @param b the ProgramBuilder
/// @param args the value nested elements will be initialized with
/// @return a new AST expression of the alias type
template <bool IS_COMPOSITE = is_composite>
static inline traits::EnableIf<!IS_COMPOSITE, const ast::Expression*> Expr(ProgramBuilder& b,
ScalarArgs args) {
// Cast
return b.Construct(AST(b), DataType<T>::Expr(b, std::move(args)));
}
/// @param b the ProgramBuilder
/// @param args the value nested elements will be initialized with
/// @return a new AST expression of the alias type
template <bool IS_COMPOSITE = is_composite>
static inline traits::EnableIf<IS_COMPOSITE, const ast::Expression*> Expr(ProgramBuilder& b,
ScalarArgs args) {
// Construct
return b.Construct(AST(b), DataType<T>::ExprArgs(b, std::move(args)));
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to ElementType
/// @return a new AST expression of the alias type
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "alias_" + std::to_string(ID); }
};
/// Helper for building pointer types and expressions
template <typename T>
struct DataType<ptr<T>> {
/// The element type
using ElementType = typename DataType<T>::ElementType;
/// true if the pointer type is a composite type
static constexpr bool is_composite = false;
/// @param b the ProgramBuilder
/// @return a new AST alias type
static inline const ast::Type* AST(ProgramBuilder& b) {
return b.create<ast::Pointer>(DataType<T>::AST(b), ast::AddressSpace::kPrivate,
ast::Access::kReadWrite);
}
/// @param b the ProgramBuilder
/// @return the semantic aliased type
static inline const sem::Type* Sem(ProgramBuilder& b) {
return b.create<sem::Pointer>(DataType<T>::Sem(b), ast::AddressSpace::kPrivate,
ast::Access::kReadWrite);
}
/// @param b the ProgramBuilder
/// @return a new AST expression of the pointer type
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs /*unused*/) {
auto sym = b.Symbols().New("global_for_ptr");
b.GlobalVar(sym, DataType<T>::AST(b), ast::AddressSpace::kPrivate);
return b.AddressOf(sym);
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to ElementType
/// @return a new AST expression of the pointer type
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() { return "ptr<" + DataType<T>::Name() + ">"; }
};
/// Helper for building array types and expressions
template <uint32_t N, typename T>
struct DataType<array<N, T>> {
/// The element type
using ElementType = typename DataType<T>::ElementType;
/// true as arrays are a composite type
static constexpr bool is_composite = true;
/// @param b the ProgramBuilder
/// @return a new AST array type
static inline const ast::Type* AST(ProgramBuilder& b) {
if (auto* ast = DataType<T>::AST(b)) {
return b.ty.array(ast, u32(N));
}
return b.ty.array(nullptr, nullptr);
}
/// @param b the ProgramBuilder
/// @return the semantic array type
static inline const sem::Type* Sem(ProgramBuilder& b) {
auto* el = DataType<T>::Sem(b);
sem::ArrayCount count = sem::ConstantArrayCount{N};
if (N == 0) {
count = sem::RuntimeArrayCount{};
}
return b.create<sem::Array>(
/* element */ el,
/* count */ count,
/* align */ el->Align(),
/* size */ N * el->Size(),
/* stride */ el->Align(),
/* implicit_stride */ el->Align());
}
/// @param b the ProgramBuilder
/// @param args args of size 1 or N with values of type T to initialize with
/// with
/// @return a new AST array value expression
static inline const ast::Expression* Expr(ProgramBuilder& b, ScalarArgs args) {
return b.Construct(AST(b), ExprArgs(b, std::move(args)));
}
/// @param b the ProgramBuilder
/// @param args args of size 1 or N with values of type T to initialize with
/// @return the list of expressions that are used to construct the array
static inline auto ExprArgs(ProgramBuilder& b, ScalarArgs args) {
const bool one_value = args.values.Length() == 1;
utils::Vector<const ast::Expression*, N> r;
for (uint32_t i = 0; i < N; i++) {
r.Push(DataType<T>::Expr(b, ScalarArgs{one_value ? args.values[0] : args.values[i]}));
}
return r;
}
/// @param b the ProgramBuilder
/// @param v arg of type double that will be cast to ElementType
/// @return a new AST array value expression
static inline const ast::Expression* ExprFromDouble(ProgramBuilder& b, double v) {
return Expr(b, ScalarArgs{static_cast<ElementType>(v)});
}
/// @returns the WGSL name for the type
static inline std::string Name() {
return "array<" + DataType<T>::Name() + ", " + std::to_string(N) + ">";
}
};
/// Struct of all creation pointer types
struct CreatePtrs {
/// ast node type create function
ast_type_func_ptr ast;
/// ast expression type create function
ast_expr_func_ptr expr;
/// ast expression type create function from double arg
ast_expr_from_double_func_ptr expr_from_double;
/// sem type create function
sem_type_func_ptr sem;
/// type name function
type_name_func_ptr name;
};
/// @param o the std::ostream to write to
/// @param ptrs the CreatePtrs
/// @return the std::ostream so calls can be chained
inline std::ostream& operator<<(std::ostream& o, const CreatePtrs& ptrs) {
return o << (ptrs.name ? ptrs.name() : "<unknown>");
}
/// Returns a CreatePtrs struct instance with all creation pointer types for
/// type `T`
template <typename T>
constexpr CreatePtrs CreatePtrsFor() {
return {DataType<T>::AST, DataType<T>::Expr, DataType<T>::ExprFromDouble, DataType<T>::Sem,
DataType<T>::Name};
}
/// Base class for Value<T>
struct ValueBase {
/// Constructor
ValueBase() = default;
/// Destructor
virtual ~ValueBase() = default;
/// Move constructor
ValueBase(ValueBase&&) = default;
/// Copy constructor
ValueBase(const ValueBase&) = default;
/// Copy assignment operator
/// @returns this instance
ValueBase& operator=(const ValueBase&) = default;
/// Creates an `ast::Expression` for the type T passing in previously stored args
/// @param b the ProgramBuilder
/// @returns an expression node
virtual const ast::Expression* Expr(ProgramBuilder& b) const = 0;
/// @returns args used to create expression via `Expr`
virtual const ScalarArgs& Args() const = 0;
/// @returns true if element type is abstract
virtual bool IsAbstract() const = 0;
/// @returns true if element type is an integral
virtual bool IsIntegral() const = 0;
/// @returns element type name
virtual std::string TypeName() const = 0;
/// Prints this value to the output stream
/// @param o the output stream
/// @returns input argument `o`
virtual std::ostream& Print(std::ostream& o) const = 0;
};
/// Value<T> is an instance of a value of type DataType<T>. Useful for storing values to create
/// expressions with.
template <typename T>
struct Value : ValueBase {
/// Constructor
/// @param a the scalar args
explicit Value(ScalarArgs a) : args(std::move(a)) {}
/// Alias to T
using Type = T;
/// Alias to DataType<T>
using DataType = builder::DataType<T>;
/// Alias to DataType::ElementType
using ElementType = typename DataType::ElementType;
/// Creates a Value<T> with `args`
/// @param args the args that will be passed to the expression
/// @returns a Value<T>
static Value Create(ScalarArgs args) { return Value{std::move(args)}; }
/// Creates an `ast::Expression` for the type T passing in previously stored args
/// @param b the ProgramBuilder
/// @returns an expression node
const ast::Expression* Expr(ProgramBuilder& b) const override {
auto create = CreatePtrsFor<T>();
return (*create.expr)(b, args);
}
/// @returns args used to create expression via `Expr`
const ScalarArgs& Args() const override { return args; }
/// @returns true if element type is abstract
bool IsAbstract() const override { return tint::IsAbstract<ElementType>; }
/// @returns true if element type is an integral
bool IsIntegral() const override { return tint::IsIntegral<ElementType>; }
/// @returns element type name
std::string TypeName() const override { return tint::FriendlyName<ElementType>(); }
/// Prints this value to the output stream
/// @param o the output stream
/// @returns input argument `o`
std::ostream& Print(std::ostream& o) const override {
o << TypeName() << "(";
for (auto& a : args.values) {
o << std::get<ElementType>(a);
if (&a != &args.values.Back()) {
o << ", ";
}
}
o << ")";
return o;
}
/// args to create expression with
ScalarArgs args;
};
namespace detail {
/// Base template for IsValue
template <typename T>
struct IsValue : std::false_type {};
/// Specialization for IsValue
template <typename T>
struct IsValue<Value<T>> : std::true_type {};
} // namespace detail
/// True if T is of type Value
template <typename T>
constexpr bool IsValue = detail::IsValue<T>::value;
/// Returns the friendly name of ValueT
template <typename ValueT, typename = traits::EnableIf<IsValue<ValueT>>>
const char* FriendlyName() {
return tint::FriendlyName<typename ValueT::ElementType>();
}
/// Creates a `Value<T>` from a scalar `v`
template <typename T>
auto Val(T v) {
return Value<T>::Create(ScalarArgs{v});
}
/// Creates a `Value<vec<N, T>>` from N scalar `args`
template <typename... T>
auto Vec(T... args) {
constexpr size_t N = sizeof...(args);
using FirstT = std::tuple_element_t<0, std::tuple<T...>>;
utils::Vector v{args...};
using VT = vec<N, FirstT>;
return Value<VT>::Create(utils::VectorRef<FirstT>{v});
}
/// Creates a `Value<mat<C,R,T>` from C*R scalar `args`
template <size_t C, size_t R, typename T>
auto Mat(const T (&m_in)[C][R]) {
utils::Vector<T, C * R> m;
for (uint32_t i = 0; i < C; ++i) {
for (size_t j = 0; j < R; ++j) {
m.Push(m_in[i][j]);
}
}
return Value<mat<C, R, T>>::Create(utils::VectorRef<T>{m});
}
/// Creates a `Value<mat<2,R,T>` from column vectors `c0` and `c1`
template <typename T, size_t R>
auto Mat(const T (&c0)[R], const T (&c1)[R]) {
constexpr size_t C = 2;
utils::Vector<T, C * R> m;
for (auto v : c0) {
m.Push(v);
}
for (auto v : c1) {
m.Push(v);
}
return Value<mat<C, R, T>>::Create(utils::VectorRef<T>{m});
}
/// Creates a `Value<mat<3,R,T>` from column vectors `c0`, `c1`, and `c2`
template <typename T, size_t R>
auto Mat(const T (&c0)[R], const T (&c1)[R], const T (&c2)[R]) {
constexpr size_t C = 3;
utils::Vector<T, C * R> m;
for (auto v : c0) {
m.Push(v);
}
for (auto v : c1) {
m.Push(v);
}
for (auto v : c2) {
m.Push(v);
}
return Value<mat<C, R, T>>::Create(utils::VectorRef<T>{m});
}
/// Creates a `Value<mat<4,R,T>` from column vectors `c0`, `c1`, `c2`, and `c3`
template <typename T, size_t R>
auto Mat(const T (&c0)[R], const T (&c1)[R], const T (&c2)[R], const T (&c3)[R]) {
constexpr size_t C = 4;
utils::Vector<T, C * R> m;
for (auto v : c0) {
m.Push(v);
}
for (auto v : c1) {
m.Push(v);
}
for (auto v : c2) {
m.Push(v);
}
for (auto v : c3) {
m.Push(v);
}
return Value<mat<C, R, T>>::Create(utils::VectorRef<T>{m});
}
} // namespace builder
} // namespace tint::resolver
#endif // SRC_TINT_RESOLVER_RESOLVER_TEST_HELPER_H_