PEG:

Vocabulary

peg

Syntax

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

Word description

Defines a word that when called will parse-fully 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. If the input is not fully consumed, the word throws an exception.

See also

PARTIAL-PEG:

Definition

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

IN: peg

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