8.6.1.0440 2VARIABLE two-variable DOUBLE
Skip leading space delimiters. Parse name delimited by a space. Create a definition for name with the execution semantics defined below. Reserve two consecutive cells of data space.
name is referred to as a "two-variable".
name Execution:
a-addr is the address of the first (lowest address) cell of two consecutive cells in data space reserved by 2VARIABLE when it defined name. A program is responsible for initializing the contents.
See:
Rationale:
Testing:
T{ 0. 2v1 2! -> }T
T{ 2v1 2@ -> 0. }T
T{ -1 -2 2v1 2! -> }T
T{ 2v1 2@ -> -1 -2 }T
T{ : cd2 2VARIABLE ; -> }T
T{ cd2 2v2 -> }T
T{ : cd3 2v2 2! ; -> }T
T{ -2 -1 cd3 -> }T
T{ 2v2 2@ -> -2 -1 }T
T{ 2VARIABLE 2v3 IMMEDIATE 5 6 2v3 2! -> }T
T{ 2v3 2@ -> 5 6 }T