#ifndef SYMBOL_VALUE_HPP
|
#define SYMBOL_VALUE_HPP
|
|
#include <algorithm>
|
#include <stdexcept>
|
#include <string>
|
#include <variant>
|
|
#include "VariableTypes.hpp"
|
|
namespace Symbols {
|
|
class Value {
|
public:
|
using Variant = std::variant<int, double, float, std::string, bool>;
|
|
Value() = default;
|
|
Value(int v) : value_(v) { type_ = Symbols::Variables::Type::INTEGER; }
|
|
Value(double v) : value_(v) { type_ = Symbols::Variables::Type::DOUBLE; }
|
|
Value(float v) : value_(v) { type_ = Symbols::Variables::Type::FLOAT; }
|
|
Value(const std::string & v) : value_(v) { type_ = Symbols::Variables::Type::STRING; }
|
|
Value(const char * v) : value_(std::string(v)) { type_ = Symbols::Variables::Type::STRING; }
|
|
Value(bool v) : value_(v) { type_ = Symbols::Variables::Type::BOOLEAN; }
|
|
Value(const std::string & str, bool autoDetectType) { *this = fromString(str, autoDetectType); }
|
|
const Variant & get() const { return value_; }
|
|
Symbols::Variables::Type getType() const { return type_; }
|
|
Variant & get() { return value_; }
|
|
template <typename T> T get() const { return std::get<T>(value_); }
|
|
static Symbols::Value makeNull() {
|
auto v = Value("null");
|
return v;
|
}
|
|
// operator+
|
friend Value operator+(const Value & lhs, const Value & rhs) {
|
return std::visit(
|
[](auto && a, auto && b) -> Value {
|
using A = std::decay_t<decltype(a)>;
|
using B = std::decay_t<decltype(b)>;
|
if constexpr ((std::is_arithmetic_v<A> && std::is_arithmetic_v<B>) ) {
|
return Value{ a + b };
|
} else {
|
throw std::runtime_error("Invalid types for operator+");
|
}
|
},
|
lhs.value_, rhs.value_);
|
}
|
|
// operator==
|
friend bool operator==(const Value & lhs, const Value & rhs) { return lhs.value_ == rhs.value_; }
|
|
// to_string helper (needed for string + int, etc.)
|
static std::string to_string(const Variant & v) {
|
return std::visit(
|
[](auto && val) -> std::string {
|
using T = std::decay_t<decltype(val)>;
|
if constexpr (std::is_same_v<T, bool>) {
|
return val ? "true" : "false";
|
} else if constexpr (std::is_same_v<T, std::string>) {
|
return val;
|
} else {
|
return std::to_string(val);
|
}
|
},
|
v);
|
}
|
|
static std::string to_string(const Value & val) { return to_string(val.value_); }
|
|
static Value fromString(const std::string & str, bool autoDetectType) {
|
if (!autoDetectType) {
|
return fromStringToString(str);
|
}
|
|
std::string trimmed = str;
|
trimmed.erase(0, trimmed.find_first_not_of(" \t\n\r"));
|
trimmed.erase(trimmed.find_last_not_of(" \t\n\r") + 1);
|
|
// Check bool literals
|
std::string lower = trimmed;
|
std::transform(lower.begin(), lower.end(), lower.begin(), ::tolower);
|
if (lower == "true" || lower == "false") {
|
try {
|
return fromStringToBool(trimmed);
|
} catch (...) {
|
}
|
}
|
|
// Check int
|
try {
|
size_t idx;
|
int i = std::stoi(trimmed, &idx);
|
if (idx == trimmed.size()) {
|
return fromStringToInt(trimmed);
|
}
|
} catch (...) {
|
}
|
|
// Check double
|
try {
|
size_t idx;
|
double d = std::stod(trimmed, &idx);
|
if (idx == trimmed.size()) {
|
return fromStringToDouble(trimmed);
|
}
|
} catch (...) {
|
}
|
|
// Fallback
|
return fromStringToString(str);
|
}
|
|
static Value fromString(const std::string & str, Symbols::Variables::Type type) {
|
switch (type) {
|
case Symbols::Variables::Type::INTEGER:
|
return fromStringToInt(str);
|
case Symbols::Variables::Type::DOUBLE:
|
return fromStringToDouble(str);
|
case Symbols::Variables::Type::FLOAT:
|
return fromStringToFloat(str);
|
case Symbols::Variables::Type::BOOLEAN:
|
return fromStringToBool(str);
|
case Symbols::Variables::Type::STRING:
|
default:
|
return fromStringToString(str);
|
}
|
}
|
private:
|
Variant value_;
|
Symbols::Variables::Type type_;
|
|
static Value fromStringToInt(const std::string & str) { return Value(std::stoi(str)); }
|
|
static Value fromStringToDouble(const std::string & str) { return Value(std::stod(str)); }
|
|
static Value fromStringToFloat(const std::string & str) { return Value(std::stof(str)); }
|
|
static Value fromStringToBool(const std::string & str) {
|
std::string s = str;
|
std::transform(s.begin(), s.end(), s.begin(), ::tolower);
|
if (s == "true" || s == "1") {
|
return Value(true);
|
}
|
if (s == "false" || s == "0") {
|
return Value(false);
|
}
|
throw std::invalid_argument("Invalid bool string: " + str);
|
}
|
|
static Value fromStringToString(const std::string & str) { return Value(str); }
|
};
|
|
} // namespace Symbols
|
|
#endif // SYMBOL_VALUE_HPP
|
