class Rattler::Parsers::Assert
Assert
decorates a parser and succeeds or fails like the decorated parser but never consumes any input (zero-width positive lookahead).
Public Instance Methods
parse(scanner, rules, scope = ParserScope.empty)
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Succeed or fail like the decorated parser but do not consume any input and return true
on success.
@param (see Match#parse
)
@return [Boolean] true
if the decorated parser succeeds
# File lib/rattler/parsers/assert.rb, line 15 def parse(scanner, rules, scope = ParserScope.empty) pos = scanner.pos result = (child.parse(scanner, rules, scope) && true) scanner.pos = pos result end