action ( parser quot -- parser )

Vocabulary

peg

Inputs

parser	a parser
quot	a quotation with stack effect ( ast -- ast )

Outputs

parser

a parser

Word description

Returns a parser that calls the parser and applies the quotation to the AST resulting from that parse. The result of the quotation is then used as the final AST. This can be used for manipulating the parse tree to produce a AST better suited for the task at hand rather than the default AST. If the quotation returns fail then the parser fails.

CHAR: 0 CHAR: 9 range [ to-digit ] action

Definition

USING: kernel peg.private ;

IN: peg

: action ( parser quot -- parser ) action-parser boa wrap-peg ;