READ

Evaluates code in a context of a new read transaction

Input stack: code

Output stack: result of code evaluation

This instruction is one of two ways one can read from the database. Instructions like RETR are only possible in the context of a READ or a WRITE.

PumpkinDB> ["hi" RETR] READ

Allocation

Will allocate for code appended with an internal transaction end marker instruction.

Errors

EmptyStack error if stack is less than one item on the stack.

DatabaseError error if there's a problem with underlying storage.

Decoding error error if the code is undecodable.

Tests

evals : [1] READ.
invalid_code : [1 READ] TRY UNWRAP 0x05 EQUAL?.
empty_stack : [READ] TRY UNWRAP 0x04 EQUAL?.

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