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#ifndef SRC_TINT_LANG_WGSL_SEM_FUNCTION_EXPRESSION_H_
#define SRC_TINT_LANG_WGSL_SEM_FUNCTION_EXPRESSION_H_

#include "src/tint/lang/wgsl/sem/expression.h"

// Forward declarations
namespace tint::ast {
class IdentifierExpression;
}  // namespace tint::ast
namespace tint::sem {
class Function;
}  // namespace tint::sem

namespace tint::sem {

/// FunctionExpression holds the semantic information for expression nodes that resolve to
/// functions.
class FunctionExpression : public Castable<FunctionExpression, Expression> {
  public:
    /// Constructor
    /// @param declaration the AST node
    /// @param statement the statement that owns this expression
    /// @param function the function that the expression resolved to
    FunctionExpression(const ast::IdentifierExpression* declaration,
                       const Statement* statement,
                       const sem::Function* function);

    /// Destructor
    ~FunctionExpression() override;

    /// @returns the AST node
    const ast::IdentifierExpression* Declaration() const;

    /// @return the function that the expression resolved to
    const sem::Function* Function() const { return function_; }

  private:
    sem::Function const* const function_;
};

}  // namespace tint::sem

#endif  // SRC_TINT_LANG_WGSL_SEM_FUNCTION_EXPRESSION_H_