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Factor handbook » The language » Syntax » Literals » Stack effect syntax

Vocabulary
syntax

Syntax

( inputs -- outputs )

Inputs
None

Outputs
None

Word description
Literal stack effect syntax. Also used by syntax words (such as :), typically declaring the stack effect of the word definition which follows.

Notes
Useful for meta-programming with define-declared.

Examples

USING: compiler.units kernel math prettyprint random words ; IN: scratchpad SYMBOL: my-dynamic-word [ my-dynamic-word 2 { [ + ] [ * ] } random curry ( x -- y ) define-declared ] with-compilation-unit 2 my-dynamic-word .
4

See also
Stack effect declarations

Definition

USING: effects.parser sequences ;

IN: syntax

SYNTAX: ( ")" parse-effect suffix! ;