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Add safe bool idiom in JsonString

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This commit is contained in:
Benoit Blanchon
2021-10-22 17:19:14 +02:00
parent 8418845c8d
commit acfa174333
5 changed files with 55 additions and 7 deletions
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9
src/ArduinoJson/Deserialization/DeserializationError.hpp
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@@ -4,6 +4,7 @@
#pragma once
#include <ArduinoJson/Misc/SafeBoolIdiom.hpp>
#include <ArduinoJson/Namespace.hpp>
#include <ArduinoJson/Polyfills/preprocessor.hpp>
#include <ArduinoJson/Polyfills/static_array.hpp>
@@ -14,11 +15,7 @@
namespace ARDUINOJSON_NAMESPACE {
class DeserializationError {
// safe bool idiom
typedef void (DeserializationError::*bool_type)() const;
void safeBoolHelper() const {}
class DeserializationError : public SafeBoolIdom<DeserializationError> {
public:
enum Code {
Ok,
@@ -58,7 +55,7 @@ class DeserializationError {
// Behaves like a bool
operator bool_type() const {
return _code != Ok ? &DeserializationError::safeBoolHelper : 0;
return _code != Ok ? safe_true() : safe_false();
}
friend bool operator==(bool value, const DeserializationError& err) {
return static_cast<bool>(err) == value;