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add composite, add bool error handling

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This commit is contained in:
ado
2020-12-12 23:32:06 +01:00
parent 0c25efd353
commit a06121ff92
2 changed files with 177 additions and 37 deletions
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63
include/ss/converter.hpp
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@@ -99,16 +99,20 @@ struct tied_class {
template <typename... Ts>
constexpr bool tied_class_v = tied_class<Ts...>::value;
// the error can be set inside a string, or a bool
enum class error_mode { String, Bool };
////////////////
// converter
////////////////
class converter {
using string_range = std::pair<const char*, const char*>;
using split_input = std::vector<string_range>;
constexpr static auto default_delimiter = ',';
public:
using split_input = std::vector<string_range>;
// parses line with given delimiter, returns a 'T' object created with
// extracted values of type 'Ts'
template <typename T, typename... Ts>
@@ -154,11 +158,17 @@ class converter {
}
bool valid() const {
return error_.empty();
return (error_mode_ == error_mode::String)
? string_error_.empty()
: bool_error_ == false;
}
const std::string& error() const {
return error_;
const std::string& error_msg() const {
return string_error_;
}
void set_error_mode(error_mode mode) {
error_mode_ = mode;
}
// 'splits' string by given delimiter, returns vector of pairs which
@@ -185,6 +195,11 @@ class converter {
// error
////////////////
void clear_error() {
string_error_.clear();
bool_error_ = false;
}
std::string error_sufix(const string_range msg, size_t pos) const {
std::string error;
error.reserve(32);
@@ -197,22 +212,38 @@ class converter {
}
void set_error_invalid_conversion(const string_range msg, size_t pos) {
error_.clear();
error_.append("invalid conversion for parameter ")
.append(error_sufix(msg, pos));
if (error_mode_ == error_mode::String) {
string_error_.clear();
string_error_
.append("invalid conversion for parameter ")
.append(error_sufix(msg, pos));
} else {
bool_error_ = true;
}
}
void set_error_validate(const char* const error, const string_range msg,
size_t pos) {
error_.clear();
error_.append(error).append(" ").append(error_sufix(msg, pos));
if (error_mode_ == error_mode::String) {
string_error_.clear();
string_error_.append(error).append(" ").append(
error_sufix(msg, pos));
} else {
bool_error_ = true;
}
}
void set_error_number_of_colums(size_t expected_pos, size_t pos) {
error_.append("invalid number of columns, expected: ")
.append(std::to_string(expected_pos))
.append(", got: ")
.append(std::to_string(pos));
if (error_mode_ == error_mode::String) {
string_error_.clear();
string_error_
.append("invalid number of columns, expected: ")
.append(std::to_string(expected_pos))
.append(", got: ")
.append(std::to_string(pos));
} else {
bool_error_ = true;
}
}
////////////////
@@ -221,7 +252,7 @@ class converter {
template <typename... Ts>
no_void_validator_tup_t<Ts...> convert_impl(const split_input& elems) {
error_.clear();
clear_error();
no_void_validator_tup_t<Ts...> ret{};
if (sizeof...(Ts) != elems.size()) {
set_error_number_of_colums(sizeof...(Ts), elems.size());
@@ -339,7 +370,9 @@ class converter {
////////////////
std::vector<string_range> input_;
std::string error_;
std::string string_error_;
bool bool_error_;
enum error_mode error_mode_ { error_mode::String };
};
template <>