Class Lisp::Format::Directives::Radix
In: lib/facet/lisp-format.rb
Parent: Directive

Represents the ~R (Radix) directive. This outputs numbers in a given radix, or using alternative forms, such as Roman numerals or cardinal/ordinal English numbers.

Methods

cardinal   cardinal_100s   execute   old_roman   ordinal   roman   roman_helper  

Public Instance methods

execute(state)

Output the given argument using one of a variety of methods. Either the argument is output using a specific radix, using cardinal or ordinal English numbers, or Roman numerals. The full form is 

  ~radix,mincol,padchar,commachar,commainterval:@R

with the same interpretation as for ~D (Decimal / Number), but using the given radix instead. An ArgumentError is raised if the argument is not an integer, or, in the case of Roman numerals, if the argument is not a Fixnum value.

If none of the parameters are given the output instead depends on the combination of modifiers:

no modifiers
the number is output as a cardinal English number,
:
the number is output as an ordinal English number,
@
the number is output as a Roman numeral,
:@
the number is output as an old Roman numeral.

An ArgumentError is raised if the argument is not an integer.

Private Instance methods

cardinal(n)

Convert the given number to a cardinal English number string.

cardinal_100s(n)

Deal with hundreds for cardinals.

old_roman(n)

Convert the given number to an old Roman numeral.

ordinal(n)

Convert the given number to an ordinal English number string.

roman(n)

Convert the given number to a Roman numeral.

roman_helper(n, table)

Helper method for roman numerals.

[Validate]