CSV::Lexer
abstract class CSV::Lexer
Overview
A CSV lexer lets you consume a CSV token by token. You can use this to efficiently parse a CSV without the need to allocate intermediate arrays.
require "csv" lexer = CSV::Lexer.new "one,two\nthree" lexer.next_token # => CSV::Token(@kind=Cell, @value="one") lexer.next_token # => CSV::Token(@kind=Cell, @value="two") lexer.next_token # => CSV::Token(@kind=Newline, @value="two") lexer.next_token # => CSV::Token(@kind=Cell, @value="three") lexer.next_token # => CSV::Token(@kind=Eof, @value="three")
Defined in:
csv/lexer.crClass Method Summary
- .new(string : String, separator = DEFAULT_SEPARATOR, quote_char = DEFAULT_QUOTE_CHAR)
Creates a CSV lexer from a
String. - .new(io : IO, separator = DEFAULT_SEPARATOR, quote_char = DEFAULT_QUOTE_CHAR)
Creates a CSV lexer from an
IO.
Instance Method Summary
- #next_token
Returns the next
Tokenin this CSV. - #quote_char : Char
- #rewind
Rewinds this lexer to its beginning.
- #separator : Char
- #token : Token
Returns the current
Token.
Instance methods inherited from class Reference
==(other : self)==(other) ==, dup dup, hash hash, inspect(io : IO) : Nil inspect, object_id : UInt64 object_id, pretty_print(pp) : Nil pretty_print, same?(other : Reference)
same?(other : Nil) same?, to_s(io : IO) : Nil to_s
Class methods inherited from class Reference
new new Instance methods inherited from class Object
!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try
Class methods inherited from class Object
from_json(string_or_io, root : String) : selffrom_json(string_or_io) : self from_json, from_yaml(string_or_io) : self from_yaml
Class Method Detail
def self.new(string : String, separator = DEFAULT_SEPARATOR, quote_char = DEFAULT_QUOTE_CHAR)Source
Creates a CSV lexer from a String.
def self.new(io : IO, separator = DEFAULT_SEPARATOR, quote_char = DEFAULT_QUOTE_CHAR)Source
Creates a CSV lexer from an IO.
Instance Method Detail
abstract def rewindSource
Rewinds this lexer to its beginning.
© 2012–2017 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/0.22.0/CSV/Lexer.html
