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#ifndef INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_EXPRESSION_EVALUATOR_HPP
#define INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_EXPRESSION_EVALUATOR_HPP
#include <exception>
#include <string>
#include "src/buildtool/build_engine/expression/expression.hpp"
#include "src/buildtool/build_engine/expression/function_map.hpp"
class Configuration;
class Evaluator {
public:
class EvaluationError : public std::exception {
public:
explicit EvaluationError(std::string const& msg,
bool while_eval = false,
bool user_context = false) noexcept
: msg_{(while_eval ? ""
: (user_context ? "UserError: "
: "EvaluationError: ")) +
msg},
while_eval_{while_eval},
user_context_{user_context} {}
[[nodiscard]] auto what() const noexcept -> char const* final {
return msg_.c_str();
}
[[nodiscard]] auto WhileEvaluation() const -> bool {
return while_eval_;
}
[[nodiscard]] auto UserContext() const -> bool { return user_context_; }
[[nodiscard]] static auto WhileEvaluating(ExpressionPtr const& expr,
Configuration const& env,
std::exception const& ex)
-> EvaluationError;
[[nodiscard]] static auto WhileEval(ExpressionPtr const& expr,
Configuration const& env,
EvaluationError const& ex)
-> EvaluationError;
[[nodiscard]] static auto WhileEvaluating(const std::string& where,
std::exception const& ex)
-> Evaluator::EvaluationError;
[[nodiscard]] static auto WhileEval(const std::string& where,
EvaluationError const& ex)
-> Evaluator::EvaluationError;
private:
std::string msg_;
bool while_eval_;
bool user_context_;
};
// Exception-free evaluation of expression
[[nodiscard]] static auto EvaluateExpression(
ExpressionPtr const& expr,
Configuration const& env,
FunctionMapPtr const& provider_functions,
std::function<void(std::string const&)> const& logger,
std::function<void(void)> const& note_user_context = []() {}) noexcept
-> ExpressionPtr;
private:
constexpr static std::size_t kLineWidth = 80;
[[nodiscard]] static auto Evaluate(ExpressionPtr const& expr,
Configuration const& env,
FunctionMapPtr const& functions)
-> ExpressionPtr;
};
#endif // INCLUDED_SRC_BUILDTOOL_BUILD_ENGINE_EXPRESSION_EVALUATOR_HPP
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