f
Factor handbook » The language » Booleans

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Vocabulary
syntax

Syntax
f


Inputs
None

Outputs
None

Word description
The f parsing word adds the f object to the parse tree, and is also the class whose sole instance is the f object. The f object is the singleton false value, the only object that is not true. The f object is not equal to the f class word, which can be pushed on the stack using word wrapper syntax:
f ! the singleton f object denoting falsity \ f ! the f class word


Definition


Methods













































































































































































































M: f editor-command
"Select an editor" editor-restarts throw-restarts
[ set-editor ] [
"Note:" print [
[
"To make this editor permanent, in your "
".factor-boot-rc" home-path " or " ".factor-rc"
home-path " add:\n" "USE: editors EDITOR: "
]
] dip [ append ] curry compose output>array pprint-line
] bi editor-command ;









M: f expected>string drop "end of input" ;


















M: f get-tftp-host drop "127.0.0.1" 69 <inet4> ;






















































M: f pdf-value drop "false" ;