STATE

( -- a-addr )

a-addr is the address of a cell containing the compilation-state flag. STATE is true when in compilation state, false otherwise. The true value in STATE is non-zero, but is otherwise implementation-defined. Only the following standard words alter the value in STATE: : (colon), ; (semicolon), ABORT, QUIT, :NONAME, [ (left-bracket), ] (right-bracket).

Note:

A program shall not directly alter the contents of STATE.

See:

Rationale:

Although EVALUATE, LOAD, INCLUDE-FILE and INCLUDED are not listed as words which alter STATE, the text interpreted by any one of these words could include one or more words which explicitly alter STATE. EVALUATE, LOAD, INCLUDE-FILE and INCLUDED do not in themselves alter STATE.

STATE does not nest with text interpreter nesting. For example, the code sequence:

   : FOO S" ]" EVALUATE ;      FOO

will leave the system in compilation state. Similarly, after LOADing a block containing ], the system will be in compilation state.

Note that ] does not affect the parse area and that the only effect that : has on the parse area is to parse a word. This entitles a program to use these words to set the state with known side-effects on the parse area. For example:

   : NOP : POSTPONE ; IMMEDIATE ;

   NOP ALIGN
   NOP ALIGNED

Some non-compliant systems have ] invoke a compiler loop in addition to setting STATE. Such a system would inappropriately attempt to compile the second use of NOP.

Testing:

T{ : GT8 STATE @ ; IMMEDIATE -> }T
T{ GT8 -> 0 }T
T{ : GT9 GT8 LITERAL ; -> }T
T{ GT9 0= -> <FALSE> }T

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