PARTIAL-PEG:

Vocabulary

peg

Syntax

PARTIAL-PEG: word ( stack -- effect ) definition... ;

Word description

Defines a word that when called will parse a string using the syntax defined by the parser created by the definition.The definition should have stack effect ( -- parser ) and the created word ( string -- ast ). The parser is compiled when first used and then reused for each subsequent invocation.

Notes

If the parsing fails, the word throws an exception.

See also

PEG:

Definition

USING: accessors combinators compiler.units effects.parser
kernel peg.private sequences words ;

IN: peg

SYNTAX: PARTIAL-PEG:
    (:) [
        [
            ( -- parser ) call-effect compile-parser
            [ perform-parse ast>> ] curry
        ] 2curry
    ] dip [ define-declared ] curry compose
    [ with-compilation-unit ] curry append! ;