refactor: start to refactor project

src/yycc/constraint/builder.hpp

@@ -0,0 +1,67 @@
+#pragma once
+#include "../constraint.hpp"
+#include "../string.hpp"
+#include <set>
+
+#define NS_YYCC_STRING ::yycc::string
+
+/// @brief The namespace containing convenient function building common used Constraint instance.
+namespace yycc::constraint::builder {
+
+    /**
+     * @brief Build Constraint for arithmetic values by minimum and maximum value range.
+     * @tparam T An arithmetic or enum type (except bool) of underlying stored value.
+     * @param[in] min_value The minimum value of range (inclusive).
+     * @param[in] max_value The maximum value of range (inclusive).
+     * @return The generated constraint instance which can be directly applied.
+    */
+    template<typename T,
+             std::enable_if_t<std::is_arithmetic_v<T> && !std::is_same_v<T, bool>, int> = 0>
+    Constraint<T> min_max_constraint(T min_value, T max_value) {
+        if (min_value > max_value)
+            throw std::invalid_argument("the max value must be equal or greater than min value");
+
+        auto fn_check = [min_value, max_value](const T& val) -> bool {
+            return (val <= max_value) && (val >= min_value);
+        };
+        auto fn_clamp = [min_value, max_value](const T& val) -> T {
+            return std::clamp(val, min_value, max_value);
+        };
+        return Constraint<T>(std::move(fn_check), std::move(fn_clamp));
+    }
+
+    /**
+     * @brief Get constraint for enum values by enumerating all possible values.
+     * @tparam T An enum type (except bool) of underlying stored value.
+     * @param[in] il An initializer list storing all possible values.
+     * @return The generated constraint instance which can be directly applied.
+    */
+    template<typename T, std::enable_if_t<std::is_enum_v<T>, int> = 0>
+    Constraint<T> enum_constraint(const std::initializer_list<T>& il) {
+        std::set<T> data(il);
+
+        auto fn_check = [data](const T& val) -> bool { return data.find(val) != data.end(); };
+        return Constraint<T>(std::move(fn_check), nullptr);
+    }
+
+    /**
+     * @brief Get constraint for string values by enumerating all possible values.
+     * @param[in] il An initializer list storing all possible values.
+     * @return The generated constraint instance which can be directly applied.
+     * @remarks
+     * Caller must make sure that the string view passed in initializer list is valid until this Constraint life time gone.
+     * Becasue this generator will not copy your given string view into string.
+    */
+    inline Constraint<NS_YYCC_STRING::u8string> GetStringEnumerationConstraint(
+        const std::initializer_list<NS_YYCC_STRING::u8string_view>& il) {
+        std::set<NS_YYCC_STRING::u8string_view> data(il);
+
+        auto fn_check = [data](const NS_YYCC_STRING::u8string& val) -> bool {
+            return data.find(NS_YYCC_STRING::u8string_view(val)) != data.end();
+        };
+        return Constraint<NS_YYCC_STRING::u8string>(std::move(fn_check), nullptr);
+    }
+
+} // namespace yycc::constraint::builder
+
+#undef NS_YYCC_STRING