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string.md

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String

Class Napi::String inherits from class Napi::Name.

Constructor

Napi::String::String();

Returns a new empty Napi::String instance.

If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

Napi::String::String(napi_env env, napi_value value); ///< Wraps a N-API value primitive.
  • [in] env - The environment in which to create the string.
  • [in] value - The primitive to wrap.

Returns a Napi::String wrapping a napi_value.

If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

Operators

operator std::string

Napi::String::operator std::string() const;

Returns a UTF-8 encoded C++ string.

operator std::u16string

Napi::String::operator std::u16string() const;

Returns a UTF-16 encoded C++ string.

Methods

New

Napi::String::New();

Returns a new empty Napi::String.

New

Napi::String::New(napi_env env, const std::string& value);
Napi::String::New(napi_env env, const std::u16::string& value);
Napi::String::New(napi_env env, const char* value);
Napi::String::New(napi_env env, const char16_t* value);
Napi::String::New(napi_env env, const char* value, size_t length);
Napi::String::New(napi_env env, const char16_t* value, size_t length);
  • [in] env: The napi_env environment in which to construct the Napi::Value object.
  • [in] value: The C++ primitive from which to instantiate the Napi::Value. value may be any of:
    • std::string& - represents a UTF8 string.
    • std::u16string& - represents a UTF16-LE string.
    • const char* - represents a UTF8 string.
    • const char16_t* - represents a UTF16-LE string.
  • [in] length: The length of the string (not necessarily null-terminated) in code units.

Returns a new Napi::String that represents the passed in C++ string.

If an error occurs, a Napi::Error will get thrown. If C++ exceptions are not being used, callers should check the result of Env::IsExceptionPending before attempting to use the returned value.

Utf8Value

std::string Napi::String::Utf8Value() const;

Returns a UTF-8 encoded C++ string.

Utf16Value

std::u16string Napi::String::Utf16Value() const;

Returns a UTF-16 encoded C++ string.