74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
#ifndef _VALIDATE_H
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#define _VALIDATE_H
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#include <functional>
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#include <stdexcept>
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#include <string>
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#include <typeinfo>
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#include <typeindex>
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#include <unordered_map>
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namespace pgv {
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using std::string;
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class UnimplementedException : public std::runtime_error {
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public:
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UnimplementedException() : std::runtime_error("not yet implemented") {}
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// Thrown by C++ validation code that is not yet implemented.
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};
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using ValidationMsg = std::string;
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class BaseValidator {
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protected:
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static std::unordered_map<std::type_index, BaseValidator*>& validators() {
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static auto* validator_map = new std::unordered_map<std::type_index, BaseValidator*>();
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return *validator_map;
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}
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};
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template <typename T>
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class Validator : public BaseValidator {
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public:
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Validator(std::function<bool(const T&, ValidationMsg*)> check) : check_(check)
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{
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validators()[std::type_index(typeid(T))] = this;
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}
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static bool CheckMessage(const T& m, ValidationMsg* err)
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{
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auto val = static_cast<Validator<T>*>(validators()[std::type_index(typeid(T))]);
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if (val) {
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return val->check_(m, err);
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}
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return true;
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}
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private:
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std::function<bool(const T&, ValidationMsg*)> check_;
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};
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static inline std::string String(const ValidationMsg& msg)
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{
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return std::string(msg);
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}
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static inline bool IsPrefix(const string& maybe_prefix, const string& search_in)
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{
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return search_in.compare(0, maybe_prefix.size(), maybe_prefix) == 0;
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}
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static inline bool IsSuffix(const string& maybe_suffix, const string& search_in)
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{
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return maybe_suffix.size() <= search_in.size() && search_in.compare(search_in.size() - maybe_suffix.size(), maybe_suffix.size(), maybe_suffix) == 0;
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}
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static inline bool Contains(const string& search_in, const string& to_find)
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{
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return search_in.find(to_find) != string::npos;
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}
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} // namespace pgv
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#endif // _VALIDATE_H
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