text: // Copyright 2020 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_SEM_SAMPLER_TYPE_H_
  #define SRC_TINT_SEM_SAMPLER_TYPE_H_
  
  #include <string>
  
  #include "src/tint/ast/sampler.h"
  #include "src/tint/sem/type.h"
  
  namespace tint::sem {
  
  /// A sampler type.
  class Sampler final : public Castable<Sampler, Type> {
   public:
    /// Constructor
    /// @param kind the kind of sampler
    explicit Sampler(ast::SamplerKind kind);
    /// Move constructor
    Sampler(Sampler&&);
    ~Sampler() override;
  
    /// @returns a hash of the type.
    size_t Hash() const override;
  
    /// @param other the other type to compare against
    /// @returns true if the this type is equal to the given type
    bool Equals(const Type& other) const override;
  
    /// @returns the sampler type
    ast::SamplerKind kind() const { return kind_; }
  
    /// @returns true if this is a comparison sampler
    bool IsComparison() const {
      return kind_ == ast::SamplerKind::kComparisonSampler;
    }
  
    /// @param symbols the program's symbol table
    /// @returns the name for this type that closely resembles how it would be
    /// declared in WGSL.
    std::string FriendlyName(const SymbolTable& symbols) const override;
  
   private:
    ast::SamplerKind const kind_;
  };
  
  }  // namespace tint::sem
  
  #endif  // SRC_TINT_SEM_SAMPLER_TYPE_H_
  