JSON/NULL?

Tests binary if it contains a valid JSON null expression

Input stack: a

Output stack: b

JSON/NULL? will push 1 if supplied binary contains a valid JSON null expression, 0 otherwise

PumpkinDB> "null" JSON/NULL?
0x01
PumpkinDB> "1" JSON/NULL?
0x00

Allocation

Allocates for parsing JSON

Errors

EmptyStack error if there are less than one item on the stack

Tests

works : "null" JSON/NULL?.
works_negative : "1" JSON/NULL? NOT.
non_json : "z" JSON/NULL? NOT.
empty_stack : [JSON/NULL?] TRY UNWRAP 0x04 EQUAL?.

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