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.

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.cr

Class Method Summary

Instance Method Summary

Instance methods inherited from class Reference

! !, ==(other)
==(other : self)
==
, hash hash, inspect(io : IO) : Nil inspect, nil? nil?, object_id object_id, same?(other : Nil)
same?(other : Reference)
same?
, to_s(io : IO) : Nil to_s

Instance methods inherited from class Object

! !, !=(other) !=, !~(other) !~, ==(other) ==, ===(other) ===, =~(other) =~, class class, clone clone, crystal_type_id crystal_type_id, dup dup, hash hash, inspect
inspect(io : IO)
inspect
, itself itself, not_nil! not_nil!, tap(&block) tap, to_json to_json, to_pretty_json(io : IO)
to_pretty_json
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

==(other : Class) ==, ===(other) ===, cast(other) : self cast, from_json(string_or_io) from_json, from_yaml(string : String) from_yaml, hash hash, inspect(io) inspect, name : String name, to_s(io) to_s

Class Method Detail

def self.new(io : IO) #

Creates a CSV lexer from an IO.


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def self.new(string : String) #

Creates a CSV lexer from a string.


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Instance Method Detail

def next_token #

Returns the next Token in this CSV.


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abstract def rewind #

Rewinds this lexer to its beginning.


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def token #

Returns the current Token.


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