Sha256: 927826c917ccb57764d12da3f722d8a3eb52db61857514ac7610b40f20081619
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Versions: 20
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Stored size: 1.92 KB
Contents
module Main
module Cast
def self.export m
module_function m
public m
end
List = []
def self.cast m, &b
define_method m, &b
export m
List << m.to_s
end
cast :boolean do |obj|
case obj.to_s
when %r/^(true|t|1)$/
true
when %r/^(false|f|0)$/
false
else
!!obj
end
end
cast :integer do |obj|
Integer obj
end
cast :float do |obj|
Float obj
end
cast :number do |obj|
Float obj rescue Integer obj
end
cast :string do |obj|
String obj
end
cast :symbol do |obj|
String(obj).to_sym
end
cast :uri do |obj|
require 'uri'
::URI.parse obj.to_s
end
cast :time do |obj|
require 'time'
::Time.parse obj.to_s
end
cast :date do |obj|
require 'date'
::Date.parse obj.to_s
end
cast :list do |*objs|
[*objs].flatten.join(',').split(/,/)
end
# add list_of_xxx methods
List.dup.each do |type|
next if type.to_s =~ %r/list/
m = "list_of_#{ type }"
define_method m do |*objs|
list(*objs).map{|obj| send type, obj}
end
export m
List << m
end
# add list_of_xxx_from_file
List.dup.each do |type|
next if type.to_s =~ %r/list/
m = "list_of_#{ type }"
define_method m do |*objs|
list(*objs).map{|obj| send type, obj}
end
export m
List << m
end
def self.[] sym
prefix = sym.to_s.downcase.to_sym
candidates = List.select{|m| m =~ %r/^#{ prefix }/i}
m = candidates.shift
raise ArgumentError, "unsupported cast: #{ sym.inspect } (#{ List.join ',' })" unless
m
raise ArgumentError, "ambiguous cast: #{ sym.inspect } (#{ List.join ',' })" unless
candidates.empty? or m.to_s == sym.to_s
this = self
lambda{|obj| method(m).call obj}
end
end
end
Version data entries
20 entries across 20 versions & 4 rubygems