    indexing
    	description: "Code used by the DATE/TIME to STRING conversion"
    	legal: "See notice at end of class."
    	status: "See notice at end of class."
    	date: "$Date: 2006-01-22 18:25:44 -0800 (Sun, 22 Jan 2006) $"
    	revision: "$Revision: 56675 $"

    class interface
    	DATE_TIME_CODE

    create
    	make (v: STRING_8)
    			-- Create code.
    		require
    			v_exists: v /= Void
    			v_is_code: is_code (v)
    		ensure
    			value_set: value.is_equal (v)

    feature -- Access

    	generating_type: STRING_8
    			-- Name of current object's generating type
    			-- (type of which it is a direct instance)
    			-- (from ANY)

    	generator: STRING_8
    			-- Name of current object's generating class
    			-- (base class of the type of which it is a direct instance)
    			-- (from ANY)

    feature -- Comparison

    	frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void
    			-- or attached to isomorphic object structures?
    			-- (from ANY)
    		ensure -- from ANY
    			shallow_implies_deep: standard_equal (some, other) implies Result
    			both_or_none_void: (some = Void) implies (Result = (other = Void))
    			same_type: (Result and (some /= Void)) implies some.same_type (other)
    			symmetric: Result implies deep_equal (other, some)

    	frozen equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached
    			-- to objects considered equal?
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.is_equal (other))

    	is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object considered
    			-- equal to current object?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			symmetric: Result implies other.is_equal (Current)
    			consistent: standard_is_equal (other) implies Result

    	frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
    			-- Are `some' and `other' either both void or attached to
    			-- field-by-field identical objects of the same type?
    			-- Always uses default object comparison criterion.
    			-- (from ANY)
    		ensure -- from ANY
    			definition: Result = (some = Void and other = Void) or else ((some /= Void and other /= Void) and then some.standard_is_equal (other))

    	frozen standard_is_equal (other: like Current): BOOLEAN
    			-- Is `other' attached to an object of the same type
    			-- as current object, and field-by-field identical to it?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			same_type: Result implies same_type (other)
    			symmetric: Result implies other.standard_is_equal (Current)

    feature -- Status report

    	conforms_to (other: ANY): BOOLEAN
    			-- Does type of current object conform to type
    			-- of `other' (as per Eiffel: The Language, chapter 13)?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void

    	is_numeric: BOOLEAN
    			-- Has the code a numeric value?

    	is_text: BOOLEAN
    			-- Has the code a string value?

    	same_type (other: ANY): BOOLEAN
    			-- Is type of current object identical to type of `other'?
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			definition: Result = (conforms_to (other) and other.conforms_to (Current))

    feature -- Duplication

    	copy (other: like Current)
    			-- Update current object using fields of object attached
    			-- to `other', so as to yield equal objects.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_equal: is_equal (other)

    	frozen deep_copy (other: like Current)
    			-- Effect equivalent to that of:
    			--		copy (`other' . deep_twin)
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, other)

    	frozen deep_twin: like Current
    			-- New object structure recursively duplicated from Current.
    			-- (from ANY)
    		ensure -- from ANY
    			deep_equal: deep_equal (Current, Result)

    	frozen standard_copy (other: like Current)
    			-- Copy every field of `other' onto corresponding field
    			-- of current object.
    			-- (from ANY)
    		require -- from ANY
    			other_not_void: other /= Void
    			type_identity: same_type (other)
    		ensure -- from ANY
    			is_standard_equal: standard_is_equal (other)

    	frozen standard_twin: like Current
    			-- New object field-by-field identical to `other'.
    			-- Always uses default copying semantics.
    			-- (from ANY)
    		ensure -- from ANY
    			standard_twin_not_void: Result /= Void
    			equal: standard_equal (Result, Current)

    	frozen twin: like Current
    			-- New object equal to `Current'
    			-- twin calls copy; to change copying/twining semantics, redefine copy.
    			-- (from ANY)
    		ensure -- from ANY
    			twin_not_void: Result /= Void
    			is_equal: Result.is_equal (Current)

    feature -- Basic operations

    	frozen default: like Current
    			-- Default value of object's type
    			-- (from ANY)

    	frozen default_pointer: POINTER
    			-- Default value of type `POINTER'
    			-- (Avoid the need to write `p'.default for
    			-- some `p' of type `POINTER'.)
    			-- (from ANY)

    	default_rescue
    			-- Process exception for routines with no Rescue clause.
    			-- (Default: do nothing.)
    			-- (from ANY)

    	frozen do_nothing
    			-- Execute a null action.
    			-- (from ANY)

    feature -- Attributes

    	count_max: INTEGER_32
    			-- Count max of the real value

    	count_min: INTEGER_32
    			-- Count min of the real value

    	name: STRING_8
    			-- Name of the code

    	type: INTEGER_32
    			-- Type number.

    	value: STRING_8
    			-- String code

    	value_max: INTEGER_32
    			-- Max of the real value

    	value_min: INTEGER_32
    			-- Min of the real value

    feature -- Change

    	set_value (v: STRING_8)
    			-- Set all the attributes such as
    			-- Value, count_max, etc.
    		require
    			v_exists: v /= Void
    			v_is_code: is_code (v)
    		ensure
    			value_set: value.is_equal (v)

    feature -- Creation

    	make (v: STRING_8)
    			-- Create code.
    		require
    			v_exists: v /= Void
    			v_is_code: is_code (v)
    		ensure
    			value_set: value.is_equal (v)

    feature -- Output

    	io: STD_FILES
    			-- Handle to standard file setup
    			-- (from ANY)

    	out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of tagged_out.
    			-- (from ANY)

    	print (some: ANY)
    			-- Write terse external representation of `some'
    			-- on standard output.
    			-- (from ANY)

    	frozen tagged_out: STRING_8
    			-- New string containing terse printable representation
    			-- of current object
    			-- Was declared in ANY as synonym of out.
    			-- (from ANY)

    feature -- Platform

    	operating_environment: OPERATING_ENVIRONMENT
    			-- Objects available from the operating system
    			-- (from ANY)

    feature -- Preconditions

    	is_code (s: STRING_8): BOOLEAN
    			-- Is the string a code?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void

    	is_colon (s: STRING_8): BOOLEAN
    			-- Is the code a separator-colomn?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal (":")

    	is_comma (s: STRING_8): BOOLEAN
    			-- Is the code a separator-coma?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal (",")

    	is_day (s: STRING_8): BOOLEAN
    			-- Is the code a day-numeric?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("dd")

    	is_day0 (s: STRING_8): BOOLEAN
    			-- Is the code a day-numeric
    			-- Padded with zero?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("[0]dd")

    	is_day_text (s: STRING_8): BOOLEAN
    			-- Is the code a day-text?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("ddd")

    	is_dot (s: STRING_8): BOOLEAN
    			-- Is the code a separator-dot?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal (".")

    	is_fractional_second (s: STRING_8): BOOLEAN
    			-- Is the code a fractional-second
    			-- With precision to n figures?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = ((s.count > 2) and then (s.substring (1, 2).is_equal ("ff") and s.substring (3, s.count).is_integer))

    	is_hour (s: STRING_8): BOOLEAN
    			-- Is the code a 24-hour-clock-scale?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("hh")

    	is_hour0 (s: STRING_8): BOOLEAN
    			-- Is the code a 24-hour-clock-scale
    			-- Padded with zero?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("[0]hh")

    	is_hour12 (s: STRING_8): BOOLEAN
    			-- Is the code a 12-hour-clock-scale?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("hh12")

    	is_hour12_0 (s: STRING_8): BOOLEAN
    			-- Is the code a 12-hour-clock-scale padded with zero?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("[0]hh12")

    	is_meridiem (s: STRING_8): BOOLEAN
    			-- Is the code a meridiem notation?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.as_upper.is_equal ("AM") or s.as_upper.is_equal ("PM")

    	is_minus (s: STRING_8): BOOLEAN
    			-- Is the code a separator-minus?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("-")

    	is_minute (s: STRING_8): BOOLEAN
    			-- Is the code a minute-numeric?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("mi")

    	is_minute0 (s: STRING_8): BOOLEAN
    			-- Is the code a minute-numeric
    			-- Padded with zero?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("[0]mi")

    	is_month (s: STRING_8): BOOLEAN
    			-- Is the code a month-numeric?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("mm")

    	is_month0 (s: STRING_8): BOOLEAN
    			-- Is the code a month-numeric
    			-- Padded with zero?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("[0]mm")

    	is_month_text (s: STRING_8): BOOLEAN
    			-- Is the code a month-text?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("mmm")

    	is_second (s: STRING_8): BOOLEAN
    			-- Is the code a second-numeric?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("ss")

    	is_second0 (s: STRING_8): BOOLEAN
    			-- Is the code a second-numeric
    			-- Padded with zero?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("[0]ss")

    	is_separator (s: STRING_8): BOOLEAN
    			-- Is the code a seperator?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = is_slash (s) or else is_colon (s) or else is_minus (s) or else is_comma (s) or else is_space (s) or else is_dot (s)

    	is_slash (s: STRING_8): BOOLEAN
    			-- Is the code a separator-slash?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("/")

    	is_space (s: STRING_8): BOOLEAN
    			-- Is the code a separator-space?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal (" ")

    	is_year2 (s: STRING_8): BOOLEAN
    			-- Is the code a year-numeric
    			-- On 2 figures?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("yy")

    	is_year4 (s: STRING_8): BOOLEAN
    			-- Is the code a year-numeric
    			-- On 4 figures?
    			-- (from CODE_VALIDITY_CHECKER)
    		require -- from CODE_VALIDITY_CHECKER
    			s_exists: s /= Void
    		ensure -- from CODE_VALIDITY_CHECKER
    			definition: Result = s.is_equal ("yyyy")

    invariant
    		-- from ANY
    	reflexive_equality: standard_is_equal (Current)
    	reflexive_conformance: conforms_to (Current)

    indexing
    	copyright: "Copyright (c) 1984-2006, Eiffel Software and others"
    	license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)"
    	source: "[
    		Eiffel Software
    		356 Storke Road, Goleta, CA 93117 USA
    		Telephone 805-685-1006, Fax 805-685-6869
    		Website http://www.eiffel.com
    		Customer support http://support.eiffel.com
    	]"

    end -- class DATE_TIME_CODE