diff options
| -rw-r--r-- | src/parcom.cr | 10 | ||||
| -rw-r--r-- | src/parcom/any_token.cr | 18 |
2 files changed, 18 insertions, 10 deletions
diff --git a/src/parcom.cr b/src/parcom.cr index 5ce8ebe..f6d1e05 100644 --- a/src/parcom.cr +++ b/src/parcom.cr @@ -81,16 +81,6 @@ module Parcom end end - class AnyToken(T) < Parser(T, T) - def parse(tokens : Tokens(T)) : Result(T, T) - if tokens.empty? - raise ParserFail.new("AnyToken: input was empty") - else - Result.new(tokens[1..], tokens[0]) - end - end - end - class Eof(T) < Parser(T, Nil) def parse(tokens : Tokens(T)) : Result(T, Nil) if tokens.empty? diff --git a/src/parcom/any_token.cr b/src/parcom/any_token.cr new file mode 100644 index 0000000..1f65bfc --- /dev/null +++ b/src/parcom/any_token.cr @@ -0,0 +1,18 @@ +require "./parser.cr" + +module Parcom + # `AnyToken` is a `Parser` that consumes exactly one token from + # the input stream and returns it. + # It fails if the input stream is empty. + class AnyToken(T) < Parser(T, T) + # Parses the first token in the input, fails if the input is empty. + def parse(tokens : Tokens(T)) : Result(T, T) + if tokens.empty? + raise ParserFail.new("AnyToken: input was empty") + else + Result.new(tokens[1..], tokens[0]) + end + end + end +end + |