14 lines
655 B
Factor
14 lines
655 B
Factor
USING: peg.ebnf help.syntax help.markup strings ;
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IN: peg-lexer
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HELP: ON-BNF:
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{ $syntax "ON-BNF: word ... ;ON-BNF" }
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{ $description "Creates a parsing word using a parser for lexer control, adding the resulting ast to the stack. Parser syntax is as in " { $link POSTPONE: EBNF: } } ;
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HELP: create-bnf
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{ $values { "name" string } { "parser" parser } }
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{ $description "Runtime equivalent of " { $link POSTPONE: ON-BNF: } " also useful with manually constructed parsers." } ;
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HELP: factor
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{ $values { "input" string } { "ast" "a sequence of tokens" } }
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{ $description "Tokenizer that acts like standard factor lexer, separating tokens by whitespace." } ; |