c006db93d4
parse(ptr, len) compiled: len converted to allow_exceptions, and ptr was read as a C string, past the end of a buffer without a terminating NUL. Delete the overloads of parse, parse_copy, accept, and read that take an integer other than bool where the flags are expected. Signed-off-by: Niels Lohmann <mail@nlohmann.me>
2.6 KiB
nlohmann::basic_json_document::parse_copy
template<typename InputType>
static basic_json_document parse_copy(InputType&& input,
const bool allow_exceptions = true,
const bool ignore_comments = false,
const bool ignore_trailing_commas = false);
Deserialize from a compatible input, always taking the document's own copy of it, regardless of the value category or
type of input. Unlike parse(), the returned document never depends on input staying alive.
Template parameters
InputType- A compatible input; see
parse.
Parameters
input(in)- Input to parse from.
allow_exceptions(in)- whether to throw exceptions in case of a parse error (optional,
#!cpp trueby default) ignore_comments(in)- whether comments should be ignored and treated like whitespace (
#!cpp true) or yield a parse error (#!cpp false); (optional,#!cpp falseby default) ignore_trailing_commas(in)- whether trailing commas in arrays or objects should be ignored and treated like whitespace (
#!cpp true) or yield a parse error (#!cpp false); (optional,#!cpp falseby default)
Return value
The parsed document, with owns_source() #!cpp true. If allow_exceptions is #!cpp false and
the input is not valid JSON, the returned document is discarded; see is_discarded.
Exceptions
Same as parse.
Complexity
Linear in the length of the input.
Notes
parse_copy() accepts and rejects exactly what parse() does, and classifies numbers the same way; it
only differs in that the input is always copied rather than sometimes borrowed. Prefer parse() when the
input's lifetime already covers the document's, since it avoids the copy for borrowed inputs.
An integer argument that is not a #!cpp bool where the flags are expected, such as #!cpp parse_copy(ptr, len), does not
compile; see parse.
Examples
??? example
The example below returns a document from a function whose local buffer would otherwise not outlive it.
```cpp
--8<-- "examples/basic_json_document__parse_copy.cpp"
```
Output:
```json
--8<-- "examples/basic_json_document__parse_copy.output"
```
See also
- parse - deserialize from a compatible input, borrowing it where possible
- owns_source - return whether the document holds its own copy of the text
Version history
- Added in version 3.13.0.