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Parse value
from an input stream.
Defined in header <boost/json/value.hpp>
friend std::istream& operator>>( std::istream& is, value& jv);
This function parses JSON from an input stream into a value.
If parsing fails, std::ios_base::failbit will be set for is and jv
will be left unchanged. Regardless of whether skipws
flag is set on is, consumes
whitespace before and after JSON, because whitespace is considered a part
of JSON. Behaves as FormattedInputFunction.
Note: this operator cannot assume that the stream only contains a single
JSON document, which may result in very underwhelming
performance, if the stream isn't cooperative. If you know that
your input consists of a single JSON document, consider using parse function instead.
Reference to is.
Linear in the size of JSON data.
Basic guarantee. Calls to memory_resource::allocate
may throw. The stream may throw as configured by std::ios::exceptions.
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Name |
Description |
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The input stream to parse from. |
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The value to parse into. |
Convenience header <boost/json.hpp>