Sha256: 15d2e2d297dffd85b73a0106027eb1c939984810de83a9f10137937e6c0ce8e6
Contents?: true
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Versions: 8
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Stored size: 1.41 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 'true'
true
when 'false'
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 :uri do |obj|
require 'uri'
::URI.parse obj.to_s
end
cast :list do |*objs|
[*objs].flatten.join(',').split(/,/)
end
List.dup.each do |type|
next if type.to_s == '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
8 entries across 8 versions & 1 rubygems