indexing
description: "Durations of date"
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 $"
access: date
class interface
DATE_DURATION
create
make (y, m, d: INTEGER_32)
yearmonthday`y'`m'`d'
ensure
year_set: year = y
month_set: month = m
day_set: day = d
make_by_days (d: INTEGER_32)
day`d'
ensure
day_set: day = d
definite_duration: definite
feature
make (y, m, d: INTEGER_32)
yearmonthday`y'`m'`d'
ensure
year_set: year = y
month_set: month = m
day_set: day = d
make_by_days (d: INTEGER_32)
day`d'
ensure
day_set: day = d
definite_duration: definite
feature
date_default_format_string: STRING_8
DATE_CONSTANTS
date_time_tools: DATE_TIME_TOOLS
TIME_UTILITY
days_in_i_th_month (i, y: INTEGER_32): INTEGER_32
`i'`y'
DATE_CONSTANTS
require DATE_CONSTANTS
i_large_enough: i >= 1
i_small_enough: i <= months_in_year
days_in_leap_year: INTEGER_32 is 366
DATE_CONSTANTS
days_in_non_leap_year: INTEGER_32 is 365
DATE_CONSTANTS
days_in_week: INTEGER_32 is 7
DATE_CONSTANTS
days_text: ARRAY [STRING_8]
DATE_CONSTANTS
default_format_string: STRING_8
TIME_UTILITY
generating_type: STRING_8
ANY
generator: STRING_8
ANY
long_days_text: ARRAY [STRING_8]
DATE_CONSTANTS
long_months_text: ARRAY [STRING_8]
DATE_CONSTANTS
max_weeks_in_year: INTEGER_32 is 53
DATE_CONSTANTS
months_in_year: INTEGER_32 is 12
DATE_CONSTANTS
months_text: ARRAY [STRING_8]
DATE_CONSTANTS
zero: DATE_DURATION
require GROUP_ELEMENT
True
ensure GROUP_ELEMENT
result_exists: Result /= Void
ensure then
definite: Result.definite
feature
frozen deep_equal (some: ANY; other: like arg #1): BOOLEAN
`some'`other'
ANY
ensure 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
`some'`other'
ANY
ensure 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
`other'
require ANY
other_not_void: other /= Void
ensure ANY
symmetric: Result implies other.is_equal (Current)
consistent: standard_is_equal (other) implies Result
ensure then
result_definition: Result = (year = other.year and then month = other.month and then day = other.day)
frozen standard_equal (some: ANY; other: like arg #1): BOOLEAN
`some'`other'
ANY
ensure 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
`other'
ANY
require ANY
other_not_void: other /= Void
ensure ANY
same_type: Result implies same_type (other)
symmetric: Result implies other.standard_is_equal (Current)
infix "<" (other: like Current): BOOLEAN
`other'
require PART_COMPARABLE
other_exists: other /= Void
ensure then
definite_duration: (definite and then other.definite) implies Result = (day < other.day)
non_definite_duration: (not definite or else not other.definite) implies Result = False
infix "<=" (other: like Current): BOOLEAN
`other'
PART_COMPARABLE
require PART_COMPARABLE
other_exists: other /= Void
infix ">" (other: like Current): BOOLEAN
`other'
PART_COMPARABLE
require PART_COMPARABLE
other_exists: other /= Void
infix ">=" (other: like Current): BOOLEAN
`other'
PART_COMPARABLE
require PART_COMPARABLE
other_exists: other /= Void
feature
canonical (date: DATE): BOOLEAN
`date'
`date'
year
month`Months_in_year - 1'
day
`date'
year
month`1 - Months_in_year'
day
require
date_exist: date /= Void
conforms_to (other: ANY): BOOLEAN
`other'
ANY
require ANY
other_not_void: other /= Void
definite: BOOLEAN
day
yearmonthday
ensure
result_definition: Result = ((year = 0) and then (month = 0))
has_origin_date: BOOLEAN
`origin date'
is_leap_year (y: INTEGER_32): BOOLEAN
`y'
DATE_CONSTANTS
is_negative: BOOLEAN
DURATION
is_positive: BOOLEAN
is_zero: BOOLEAN
DURATION
same_type (other: ANY): BOOLEAN
`other'
ANY
require ANY
other_not_void: other /= Void
ensure ANY
definition: Result = (conforms_to (other) and other.conforms_to (Current))
feature
set_origin_date (d: DATE)
origin_date`d'
ensure
origin_date_set: origin_date = d
feature
prefix "+": like Current
DURATION
ensure GROUP_ELEMENT
result_exists: Result /= Void
result_definition: Result.is_equal (Current)
infix "-" (other: like Current): like Current
`other'
DURATION
require GROUP_ELEMENT
other_exists: other /= Void
ensure GROUP_ELEMENT
result_exists: Result /= Void
feature
to_canonical (start_date: DATE): like Current
`date'
require
start_date_not_void: start_date /= Void
ensure
canonical_result: Result.canonical (start_date)
duration_not_changed: equal (start_date + Current, start_date + Result)
to_date_time: DATE_TIME_DURATION
ensure
result_exists: Result /= Void
year_set: Result.year = year
month_set: Result.month = month
day_set: Result.day = day
to_definite (date: DATE)
require
date_exists: date /= Void
ensure
definite_result: definite
feature
copy (other: like Current)
`other'
ANY
require ANY
other_not_void: other /= Void
type_identity: same_type (other)
ensure ANY
is_equal: is_equal (other)
frozen deep_copy (other: like Current)
copy`other'deep_twin
ANY
require ANY
other_not_void: other /= Void
ensure ANY
deep_equal: deep_equal (Current, other)
frozen deep_twin: like Current
ANY
ensure ANY
deep_equal: deep_equal (Current, Result)
frozen standard_copy (other: like Current)
`other'
ANY
require ANY
other_not_void: other /= Void
type_identity: same_type (other)
ensure ANY
is_standard_equal: standard_is_equal (other)
frozen standard_twin: like Current
`other'
ANY
ensure ANY
standard_twin_not_void: Result /= Void
equal: standard_equal (Result, Current)
frozen twin: like Current
`Current'
twincopycopy
ANY
ensure ANY
twin_not_void: Result /= Void
is_equal: Result.is_equal (Current)
feature
frozen default: like Current
ANY
frozen default_pointer: POINTER
`POINTER'
`p'default
`p'`POINTER'
ANY
default_rescue
ANY
frozen do_nothing
ANY
infix "+" (other: like Current): like Current
`other'
require GROUP_ELEMENT
other_exists: other /= Void
ensure GROUP_ELEMENT
result_exists: Result /= Void
commutative: Result.is_equal (other + Current)
ensure then
origin_equal: equal (origin_date, Result.origin_date)
prefix "-": like Current
require GROUP_ELEMENT
True
ensure GROUP_ELEMENT
result_exists: Result /= Void
result_definition: (Result + Current).is_equal (zero)
ensure then
origin_equal: equal (origin_date, Result.origin_date)
feature
day: INTEGER_32
days_count: INTEGER_32
require
origin_date_set: has_origin_date
month: INTEGER_32
origin_date: DATE
year: INTEGER_32
feature
day_add (d: INTEGER_32)
`d'`Current'
ensure
day_set: day = old day + d
month_add (m: INTEGER_32)
`m'`Current'
ensure
month_set: month = old month + m
set_date (y, m, d: INTEGER_32)
year`y'month`m'day`d'
require DATE_MEASUREMENT
d_large_enough: d >= 1
m_large_enough: m >= 1
m_small_enough: m <= months_in_year
d_small_enough: d <= days_in_i_th_month (m, y)
ensure DATE_MEASUREMENT
day_set: day = d
month_set: month = m
year_set: year = y
set_day (d: INTEGER_32)
day`d'
require DATE_MEASUREMENT
d_large_enough: d >= 1
d_small_enough: d <= days_in_month
ensure DATE_MEASUREMENT
day_set: day = d
set_month (m: INTEGER_32)
month`m'
require DATE_MEASUREMENT
m_large_enough: m >= 1
m_small_enough: m <= months_in_year
d_small_enough: day <= days_in_i_th_month (m, year)
ensure DATE_MEASUREMENT
month_set: month = m
set_year (y: INTEGER_32)
year`y'
require DATE_MEASUREMENT
can_not_cut_29th_feb: day <= days_in_i_th_month (month, y)
ensure DATE_MEASUREMENT
year_set: year = y
year_add (y: INTEGER_32)
`y'`Current'
ensure
year_set: year = old year + y
feature
io: STD_FILES
ANY
out: STRING_8
ANYtagged_out
ANY
print (some: ANY)
`some'
ANY
frozen tagged_out: STRING_8
ANYout
ANY
feature
operating_environment: OPERATING_ENVIRONMENT
ANY
feature
days_in_month: INTEGER_32
DATE_MEASUREMENT
ensure DATE_MEASUREMENT
positive_result: Result > 0
invariant
equal_signs: (has_origin_date and then canonical (origin_date)) implies (day >= 0 and month >= 0 and year >= 0) or (day <= 0 and month <= 0 and year <= 0)
DURATION
sign_correctness: is_positive xor is_negative xor is_zero
ANY
reflexive_equality: standard_is_equal (Current)
reflexive_conformance: conforms_to (Current)
GROUP_ELEMENT
neutral_addition: Current.is_equal (Current + zero)
self_subtraction: zero.is_equal (Current - 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 DATE_DURATION