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add const access #20

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Merged
jart merged 1 commit into from
Apr 8, 2026
+60 −0
Merged

add const access #20

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55 changes: 55 additions & 0 deletions json.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -521,6 +521,17 @@ Json::getString()
}
}

const std::string&
Json::getString() const
{
switch (type_) {
case String:
return string_value;
default:
ON_LOGIC_ERROR("JSON value is not a string.");
}
}

std::vector<Json>&
Json::getArray()
{
Expand All @@ -532,6 +543,17 @@ Json::getArray()
}
}

const std::vector<Json>&
Json::getArray() const
{
switch (type_) {
case Array:
return array_value;
default:
ON_LOGIC_ERROR("JSON value is not an array.");
}
}

std::map<std::string, Json>&
Json::getObject()
{
Expand All @@ -543,6 +565,17 @@ Json::getObject()
}
}

const std::map<std::string, Json>&
Json::getObject() const
{
switch (type_) {
case Object:
return object_value;
default:
ON_LOGIC_ERROR("JSON value is not an object.");
}
}

void
Json::setArray()
{
Expand Down Expand Up @@ -580,6 +613,17 @@ Json::operator[](size_t index)
return array_value[index];
}

const Json&
Json::operator[](size_t index) const
{
if (!isArray())
ON_LOGIC_ERROR("JSON value is not an array.");
if (index >= array_value.size()) {
ON_LOGIC_ERROR("JSON index not in array.");
}
return array_value[index];
}

Json&
Json::operator[](const std::string& key)
{
Expand All @@ -588,6 +632,17 @@ Json::operator[](const std::string& key)
return object_value[key];
}

const Json&
Json::operator[](const std::string& key) const
{
if (!isObject())
ON_LOGIC_ERROR("JSON value is not an object.");
auto it = object_value.find(key);
if (it == object_value.end())
ON_LOGIC_ERROR("JSON object does not contain key.");
return it->second;
}

std::string
Json::toString() const
{
Expand Down
5 changes: 5 additions & 0 deletions json.h
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Original file line number Diff line number Diff line change
Expand Up @@ -190,8 +190,11 @@ class Json
double getDouble() const;
double getNumber() const;
long long getLong() const;
const std::string& getString() const;
std::string& getString();
const std::vector<Json>& getArray() const;
std::vector<Json>& getArray();
const std::map<std::string, Json>& getObject() const;
std::map<std::string, Json>& getObject();

bool contains(const std::string&) const;
Expand All @@ -206,7 +209,9 @@ class Json
Json& operator=(Json&&);

Json& operator[](size_t);
const Json& operator[](size_t) const;
Json& operator[](const std::string&);
const Json& operator[](const std::string&) const;

operator std::string() const
{
Expand Down
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