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LibIPC+IPCCompiler: Templatize encoding/decoding of Optional<T>

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This was the last one! IPCCompiler no longer has any type-specific
encoding/decoding logic! :^)
This commit is contained in:
Andreas Kling 2020-05-12 19:02:44 +02:00
parent 6800f6eff5
commit 413ab652c8
3 changed files with 29 additions and 21 deletions
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24
DevTools/IPCCompiler/main.cpp
View file

@ -310,20 +310,8 @@ int main(int argc, char** argv)
if (parameter.type == "bool")
initial_value = "false";
out() << " " << parameter.type << " " << parameter.name << " = " << initial_value << ";";
if (parameter.type.starts_with("Optional<")) {
out() << " bool has_value = false;";
out() << " stream >> has_value;";
out() << " if (has_value) {";
out() << " " << parameter.type.substring_view(9, parameter.type.length() - 10) << " value;";
out() << " if (!decoder.decode(value))";
out() << " return nullptr;";
out() << " " << parameter.name << " = value;";
out() << " }";
} else {
out() << " if (!decoder.decode(" << parameter.name << "))";
out() << " return nullptr;";
}
out() << " if (!decoder.decode(" << parameter.name << "))";
out() << " return nullptr;";
}
StringBuilder builder;
@ -343,13 +331,7 @@ int main(int argc, char** argv)
out() << " stream << endpoint_magic();";
out() << " stream << (int)MessageID::" << name << ";";
for (auto& parameter : parameters) {
if (parameter.type.starts_with("Optional<")) {
out() << " stream << m_" << parameter.name << ".has_value();";
out() << " if (m_" << parameter.name << ".has_value())";
out() << " stream << m_" << parameter.name << ".value();";
} else {
out() << " stream << m_" << parameter.name << ";";
}
out() << " stream << m_" << parameter.name << ";";
}
out() << " return buffer;";
out() << " }";

17
Libraries/LibIPC/Decoder.h
View file

@ -83,6 +83,23 @@ public:
return true;
}
template<typename T>
bool decode(Optional<T>& optional)
{
bool has_value;
if (!decode(has_value))
return false;
if (!has_value) {
optional = {};
return true;
}
T value;
if (!decode(value))
return false;
optional = move(value);
return true;
}
private:
BufferStream& m_stream;
};

9
Libraries/LibIPC/Encoder.h
View file

@ -76,6 +76,15 @@ public:
return *this;
}
template<typename T>
Encoder& operator<<(const Optional<T>& optional)
{
*this << optional.has_value();
if (optional.has_value())
*this << optional.value();
return *this;
}
template<typename T>
void encode(const T& value)
{