note description: "Facility routines to check the validity of a DATE_TIME_CODE" legal: "See notice at end of class." status: "See notice at end of class." date: "$Date: 2017-03-29 12:26:46 +0000 (Wed, 29 Mar 2017) $" revision: "$Revision: 100065 $" class CODE_VALIDITY_CHECKER create default_create feature {NONE} -- Initialization default_create -- Process instances of classes with no creation clause. -- (Default: do nothing.) -- (from ANY) do end feature -- Access generating_type: TYPE [detachable CODE_VALIDITY_CHECKER] -- Type of current object -- (type of which it is a direct instance) -- (from ANY) external "built_in" ensure -- from ANY generating_type_not_void: Result /= Void end generator: STRING_8 -- Name of current object's generating class -- (base class of the type of which it is a direct instance) -- (from ANY) external "built_in" ensure -- from ANY generator_not_void: Result /= Void generator_not_empty: not Result.is_empty end feature -- Comparison frozen deep_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void -- or attached to isomorphic object structures? -- (from ANY) do if a = Void then Result := b = Void else Result := b /= Void and then a.is_deep_equal (b) end ensure -- from ANY instance_free: class shallow_implies_deep: standard_equal (a, b) implies Result both_or_none_void: (a = Void) implies (Result = (b = Void)) same_type: (Result and (a /= Void)) implies (b /= Void and then a.same_type (b)) symmetric: Result implies deep_equal (b, a) end frozen equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached -- to objects considered equal? -- (from ANY) do if a = Void then Result := b = Void else Result := b /= Void and then a.is_equal (b) end ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.is_equal (b)) end frozen is_deep_equal (other: CODE_VALIDITY_CHECKER): BOOLEAN -- Are Current and other attached to isomorphic object structures? -- (from ANY) require -- from ANY other_not_void: other /= Void external "built_in" ensure -- from ANY shallow_implies_deep: standard_is_equal (other) implies Result same_type: Result implies same_type (other) symmetric: Result implies other.is_deep_equal (Current) end is_equal (other: CODE_VALIDITY_CHECKER): BOOLEAN -- Is other attached to an object considered -- equal to current object? -- (from ANY) require -- from ANY other_not_void: other /= Void external "built_in" ensure -- from ANY symmetric: Result implies other ~ Current consistent: standard_is_equal (other) implies Result end frozen standard_equal (a: detachable ANY; b: like arg #1): BOOLEAN -- Are a and b either both void or attached to -- field-by-field identical objects of the same type? -- Always uses default object comparison criterion. -- (from ANY) do if a = Void then Result := b = Void else Result := b /= Void and then a.standard_is_equal (b) end ensure -- from ANY instance_free: class definition: Result = (a = Void and b = Void) or else ((a /= Void and b /= Void) and then a.standard_is_equal (b)) end frozen standard_is_equal (other: CODE_VALIDITY_CHECKER): 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 external "built_in" ensure -- from ANY same_type: Result implies same_type (other) symmetric: Result implies other.standard_is_equal (Current) end 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 external "built_in" end 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 external "built_in" ensure -- from ANY definition: Result = (conforms_to (other) and other.conforms_to (Current)) end feature -- Duplication frozen clone (other: detachable ANY): like other obsolete "Use `twin' instead. [2017-05-31]" -- Void if other is void; otherwise new object -- equal to other -- -- For non-void other, clone calls copy; -- to change copying/cloning semantics, redefine copy. -- (from ANY) do if other /= Void then Result := other.twin end ensure -- from ANY instance_free: class equal: Result ~ other end copy (other: CODE_VALIDITY_CHECKER) -- 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) external "built_in" ensure -- from ANY is_equal: Current ~ other end frozen deep_clone (other: detachable ANY): like other obsolete "Use `deep_twin' instead. [2017-05-31]" -- Void if other is void: otherwise, new object structure -- recursively duplicated from the one attached to other -- (from ANY) do if other /= Void then Result := other.deep_twin end ensure -- from ANY instance_free: class deep_equal: deep_equal (other, Result) end frozen deep_copy (other: CODE_VALIDITY_CHECKER) -- Effect equivalent to that of: -- copy (other . deep_twin) -- (from ANY) require -- from ANY other_not_void: other /= Void do copy (other.deep_twin) ensure -- from ANY deep_equal: deep_equal (Current, other) end frozen deep_twin: CODE_VALIDITY_CHECKER -- New object structure recursively duplicated from Current. -- (from ANY) external "built_in" ensure -- from ANY deep_twin_not_void: Result /= Void deep_equal: deep_equal (Current, Result) end frozen standard_clone (other: detachable ANY): like other obsolete "Use `standard_twin' instead. [2017-05-31]" -- Void if other is void; otherwise new object -- field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) do if other /= Void then Result := other.standard_twin end ensure -- from ANY instance_free: class equal: standard_equal (Result, other) end frozen standard_copy (other: CODE_VALIDITY_CHECKER) -- 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) external "built_in" ensure -- from ANY is_standard_equal: standard_is_equal (other) end frozen standard_twin: CODE_VALIDITY_CHECKER -- New object field-by-field identical to other. -- Always uses default copying semantics. -- (from ANY) external "built_in" ensure -- from ANY standard_twin_not_void: Result /= Void equal: standard_equal (Result, Current) end frozen twin: CODE_VALIDITY_CHECKER -- New object equal to Current -- twin calls copy; to change copying/twinning semantics, redefine copy. -- (from ANY) external "built_in" ensure -- from ANY twin_not_void: Result /= Void is_equal: Result ~ Current end feature -- Basic operations frozen as_attached: attached CODE_VALIDITY_CHECKER obsolete "Remove calls to this feature. [2017-05-31]" -- Attached version of Current. -- (Can be used during transitional period to convert -- non-void-safe classes to void-safe ones.) -- (from ANY) do Result := Current end frozen default: detachable CODE_VALIDITY_CHECKER -- Default value of object's type -- (from ANY) do end frozen default_pointer: POINTER -- Default value of type POINTER -- (Avoid the need to write p.default for -- some p of type POINTER.) -- (from ANY) do ensure -- from ANY instance_free: class end default_rescue -- Process exception for routines with no Rescue clause. -- (Default: do nothing.) -- (from ANY) do end frozen do_nothing -- Execute a null action. -- (from ANY) do ensure -- from ANY instance_free: class end feature -- Output Io: STD_FILES -- Handle to standard file setup -- (from ANY) once create Result Result.set_output_default ensure -- from ANY instance_free: class io_not_void: Result /= Void end out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) do Result := tagged_out ensure -- from ANY out_not_void: Result /= Void end print (o: detachable ANY) -- Write terse external representation of o -- on standard output. -- (from ANY) do if o /= Void then Io.put_string (o.out) end ensure -- from ANY instance_free: class end frozen tagged_out: STRING_8 -- New string containing terse printable representation -- of current object -- (from ANY) external "built_in" ensure -- from ANY tagged_out_not_void: Result /= Void end feature -- Platform Operating_environment: OPERATING_ENVIRONMENT -- Objects available from the operating system -- (from ANY) once create Result ensure -- from ANY instance_free: class operating_environment_not_void: Result /= Void end feature -- Preconditions is_code (s: STRING_8): BOOLEAN -- Is the string a code? require s_exists: s /= Void do Result := is_colon (s) or is_comma (s) or is_day (s) or is_day0 (s) or is_day_text (s) or is_dot (s) or is_fractional_second (s) or is_hour (s) or is_hour0 (s) or is_hour12 (s) or is_hour12_0 (s) or is_meridiem (s) or is_minus (s) or is_minute (s) or is_minute0 (s) or is_month (s) or is_month0 (s) or is_month_text (s) or is_second (s) or is_second0 (s) or is_slash (s) or is_space (s) or is_year2 (s) or is_year4 (s) end is_colon (s: STRING_8): BOOLEAN -- Is the code a separator-colomn? require s_exists: s /= Void do Result := s.same_string (":") ensure definition: Result = s.same_string (":") end is_comma (s: STRING_8): BOOLEAN -- Is the code a separator-coma? require s_exists: s /= Void do Result := s.same_string (",") ensure definition: Result = s.same_string (",") end is_day (s: STRING_8): BOOLEAN -- Is the code a day-numeric? require s_exists: s /= Void do Result := s.same_string ("dd") ensure definition: Result = s.same_string ("dd") end is_day0 (s: STRING_8): BOOLEAN -- Is the code a day-numeric -- Padded with zero? require s_exists: s /= Void do Result := s.same_string ("[0]dd") ensure definition: Result = s.same_string ("[0]dd") end is_day_text (s: STRING_8): BOOLEAN -- Is the code a day-text? require s_exists: s /= Void do Result := s.same_string ("ddd") ensure definition: Result = s.same_string ("ddd") end is_dot (s: STRING_8): BOOLEAN -- Is the code a separator-dot? require s_exists: s /= Void do Result := s.same_string (".") ensure definition: Result = s.same_string (".") end is_fractional_second (s: STRING_8): BOOLEAN -- Is the code a fractional-second -- With precision to n figures? require s_exists: s /= Void do if s.count > 2 then Result := s.substring (1, 2).same_string ("ff") and s.substring (3, s.count).is_integer end ensure definition: Result = (s.count > 2 and then (s.substring (1, 2).same_string ("ff") and s.substring (3, s.count).is_integer)) end is_hour (s: STRING_8): BOOLEAN -- Is the code a 24-hour-clock-scale? require s_exists: s /= Void do Result := s.same_string ("hh") ensure definition: Result = s.same_string ("hh") end is_hour0 (s: STRING_8): BOOLEAN -- Is the code a 24-hour-clock-scale -- Padded with zero? require s_exists: s /= Void do Result := s.same_string ("[0]hh") ensure definition: Result = s.same_string ("[0]hh") end is_hour12 (s: STRING_8): BOOLEAN -- Is the code a 12-hour-clock-scale? require s_exists: s /= Void do Result := s.same_string ("hh12") ensure definition: Result = s.same_string ("hh12") end is_hour12_0 (s: STRING_8): BOOLEAN -- Is the code a 12-hour-clock-scale padded with zero? require s_exists: s /= Void do Result := s.same_string ("[0]hh12") ensure definition: Result = s.same_string ("[0]hh12") end is_meridiem (s: STRING_8): BOOLEAN -- Is the code a meridiem notation? require s_exists: s /= Void local tmp: STRING_8 do tmp := s.as_upper Result := tmp.same_string ("AM") or tmp.same_string ("PM") ensure definition: Result = s.as_upper.same_string ("AM") or s.as_upper.same_string ("PM") end is_minus (s: STRING_8): BOOLEAN -- Is the code a separator-minus? require s_exists: s /= Void do Result := s.same_string ("-") ensure definition: Result = s.same_string ("-") end is_minute (s: STRING_8): BOOLEAN -- Is the code a minute-numeric? require s_exists: s /= Void do Result := s.same_string ("mi") ensure definition: Result = s.same_string ("mi") end is_minute0 (s: STRING_8): BOOLEAN -- Is the code a minute-numeric -- Padded with zero? require s_exists: s /= Void do Result := s.same_string ("[0]mi") ensure definition: Result = s.same_string ("[0]mi") end is_month (s: STRING_8): BOOLEAN -- Is the code a month-numeric? require s_exists: s /= Void do Result := s.same_string ("mm") ensure definition: Result = s.same_string ("mm") end is_month0 (s: STRING_8): BOOLEAN -- Is the code a month-numeric -- Padded with zero? require s_exists: s /= Void do Result := s.same_string ("[0]mm") ensure definition: Result = s.same_string ("[0]mm") end is_month_text (s: STRING_8): BOOLEAN -- Is the code a month-text? require s_exists: s /= Void do Result := s.same_string ("mmm") ensure definition: Result = s.same_string ("mmm") end is_second (s: STRING_8): BOOLEAN -- Is the code a second-numeric? require s_exists: s /= Void do Result := s.same_string ("ss") ensure definition: Result = s.same_string ("ss") end is_second0 (s: STRING_8): BOOLEAN -- Is the code a second-numeric -- Padded with zero? require s_exists: s /= Void do Result := s.same_string ("[0]ss") ensure definition: Result = s.same_string ("[0]ss") end is_separator (s: STRING_8): BOOLEAN -- Is the code a separator? require s_exists: s /= Void do 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) ensure 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) end is_slash (s: STRING_8): BOOLEAN -- Is the code a separator-slash? require s_exists: s /= Void do Result := s.same_string ("/") ensure definition: Result = s.same_string ("/") end is_space (s: STRING_8): BOOLEAN -- Is the code a separator-space? require s_exists: s /= Void do Result := s.same_string (" ") ensure definition: Result = s.same_string (" ") end is_year2 (s: STRING_8): BOOLEAN -- Is the code a year-numeric -- On 2 figures? require s_exists: s /= Void do Result := s.same_string ("yy") ensure definition: Result = s.same_string ("yy") end is_year4 (s: STRING_8): BOOLEAN -- Is the code a year-numeric -- On 4 figures? require s_exists: s /= Void do Result := s.same_string ("yyyy") ensure definition: Result = s.same_string ("yyyy") end feature {NONE} -- Retrieval frozen internal_correct_mismatch -- Called from runtime to perform a proper dynamic dispatch on correct_mismatch -- from MISMATCH_CORRECTOR. -- (from ANY) local l_msg: STRING_8 l_exc: EXCEPTIONS do if attached {MISMATCH_CORRECTOR} Current as l_corrector then l_corrector.correct_mismatch else create l_msg.make_from_string ("Mismatch: ") create l_exc l_msg.append (generating_type.name) l_exc.raise_retrieval_exception (l_msg) end end invariant -- from ANY reflexive_equality: standard_is_equal (Current) reflexive_conformance: conforms_to (Current) note copyright: "Copyright (c) 1984-2017, Eiffel Software and others" license: "Eiffel Forum License v2 (see http://www.eiffel.com/licensing/forum.txt)" source: "[ Eiffel Software 5949 Hollister Ave., 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 CODE_VALIDITY_CHECKER
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