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Diffstat (limited to 'src/__OLD_parcom/at_most.cr')
| -rw-r--r-- | src/__OLD_parcom/at_most.cr | 29 |
1 files changed, 0 insertions, 29 deletions
diff --git a/src/__OLD_parcom/at_most.cr b/src/__OLD_parcom/at_most.cr deleted file mode 100644 index b70164f..0000000 --- a/src/__OLD_parcom/at_most.cr +++ /dev/null @@ -1,29 +0,0 @@ -require "./parser.cr" -require "./map.cr" -require "./exactly.cr" -require "./optional.cr" - -module Parcom - # `AtMost` is a `Parser` that tries to parse with another parser a specific - # number of times. The results of each successful parse are returned in an - # array. If the specific number of parses succeed, the parsing stops, even - # if it is possible to keep parsing. If the parser is never successful, it - # succeeds with an empty array. - class AtMost(T, V) < Parser(T, Array(V)) - @p : Map(T, Array(V?), Array(V)) - - # Accepts the number of parsing attempts, and the parser to use. - def initialize(i : Int, p : Parser(T, V)) - @p = Exactly.new(i, Optional.new(p)).map(&.compact) - end - - # Tries to parse up to the given number of times. - # If the parser never succeeds, returns an empty array. - def parse(tokens : Tokens(T)) : Result(T, Array(V)) - @p.parse(tokens) - rescue ex : ParserFail - raise ParserFail.new("AtMost: #{ex.message}") - end - end -end - |
