summaryrefslogtreecommitdiff
path: root/src/buildtool/build_engine/expression/evaluator.hpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/buildtool/build_engine/expression/evaluator.hpp')
-rw-r--r--src/buildtool/build_engine/expression/evaluator.hpp76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/buildtool/build_engine/expression/evaluator.hpp b/src/buildtool/build_engine/expression/evaluator.hpp
new file mode 100644
index 00000000..b4cd5979
--- /dev/null
+++ b/src/buildtool/build_engine/expression/evaluator.hpp
@@ -0,0 +1,76 @@
+#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