fast.json

A fast JSON parser implementing RFC 7159.

The most prominent change compared to the initial revision is the allowance of all data types as root values, not just objects and arrays.

Members

DataType enum DataType: JSON data types returned by peek.
trustedSource anonymousenum trustedSource: Validation strength of JSON parser

parseJSON auto parseJSON(T text): Loads a JSON string and validates the used parts. This includes a UTF-8 validation on strings.
parseJSONFile auto parseJSONFile(char[] fname)
auto parseJSONFile(Filename fname): Loads a file as JSON text and validates the used parts. This includes a UTF-8 validation on strings.
parseTrustedJSON auto parseTrustedJSON(T text): Load a JSON string that is considered 100% correct. No checks will be performed, not even if you try to read a number as a string.
parseTrustedJSONFile Json!trustedSource.File parseTrustedJSONFile(char[] fname)
Json!trustedSource.File parseTrustedJSONFile(Filename fname): Load a file as JSON text that is considered 100% correct. No checks will be performed, not even if you try to read a number as a string.
validateJSON void validateJSON(T text): Validates a JSON string.
validateJSONFile void validateJSONFile(char[] fname)
void validateJSONFile(Filename fname): Validates a JSON text file.

Json struct Json(uint vl = validateUsed, bool validateUtf8 = vl > trustedSource): This is a forward JSON parser for picking off items of interest on the go. It neither produces a node structure, nor does it produce events. Instead you can peek at the value type that lies ahead and/or directly consume a JSON value from the parser. Objects and arrays can be iterated over via foreach, while you can also directly ask for one or multiple keys of an object.
JsonMapping struct JsonMapping: A UDA used to remap enum members or struct field names to JSON strings.
JsonParserState struct JsonParserState: JSON parser state returned by the state property.

This parser only supports UTF-8 without BOM.
When a JSON object has duplicate keys, the last one in the set will determine the value of associative-array entries or struct fields.
BigInt and large number parsing are not implemented currently, but all integral types as well as minimal exact representations of many double values are supported.