note
	description: "[
		The ASCII character set.
		This class may be used as ancestor by classes needing its facilities.
	]"
	library: "Free implementation of ELKS library"
	status: "See notice at end of class."
	legal: "See notice at end of class."
	date: "$Date: 2018-04-28 20:47:11 +0000 (Sat, 28 Apr 2018) $"
	revision: "$Revision: 101695 $"

class 
	ASCII

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

	Ack: INTEGER_32 = 6

	Ampersand: INTEGER_32 = 38

	Back_space: INTEGER_32 = 8

	Backslash: INTEGER_32 = 92

	Bar: INTEGER_32 = 124

	Bel: INTEGER_32 = 7

	Blank: INTEGER_32 = 32

	Break: INTEGER_32 = -7

	Bs: INTEGER_32 = 8

	Buf_overflow: INTEGER_32 = -9

	Can: INTEGER_32 = 24

	Carriage_return: INTEGER_32 = 13

	Case_diff: INTEGER_32 = 32
			-- Lower_a - Upper_a

	Character_set_size: INTEGER_32 = 128

	Circumflex: INTEGER_32 = 94

	Closing_brace: INTEGER_32 = 125

	Colon: INTEGER_32 = 58

	Comma: INTEGER_32 = 44

	Commercial_at: INTEGER_32 = 64

	Cr: INTEGER_32 = 13

	Ctrl_a: INTEGER_32 = 1

	Ctrl_b: INTEGER_32 = 2

	Ctrl_backslash: INTEGER_32 = 28

	Ctrl_c: INTEGER_32 = 3

	Ctrl_circumflex: INTEGER_32 = 30

	Ctrl_d: INTEGER_32 = 4

	Ctrl_e: INTEGER_32 = 5

	Ctrl_f: INTEGER_32 = 6

	Ctrl_g: INTEGER_32 = 7

	Ctrl_h: INTEGER_32 = 8

	Ctrl_i: INTEGER_32 = 9

	Ctrl_j: INTEGER_32 = 10

	Ctrl_k: INTEGER_32 = 11

	Ctrl_l: INTEGER_32 = 12

	Ctrl_lbracket: INTEGER_32 = 27

	Ctrl_m: INTEGER_32 = 13

	Ctrl_n: INTEGER_32 = 14

	Ctrl_o: INTEGER_32 = 15

	Ctrl_p: INTEGER_32 = 16

	Ctrl_q: INTEGER_32 = 17

	Ctrl_questmark: INTEGER_32 = 127

	Ctrl_r: INTEGER_32 = 18

	Ctrl_rbracket: INTEGER_32 = 29

	Ctrl_s: INTEGER_32 = 19

	Ctrl_t: INTEGER_32 = 20

	Ctrl_u: INTEGER_32 = 21

	Ctrl_underlined: INTEGER_32 = 31

	Ctrl_v: INTEGER_32 = 22

	Ctrl_w: INTEGER_32 = 23

	Ctrl_x: INTEGER_32 = 24

	Ctrl_y: INTEGER_32 = 25

	Ctrl_z: INTEGER_32 = 26

	Dc1: INTEGER_32 = 17

	Dc2: INTEGER_32 = 18

	Dc3: INTEGER_32 = 19

	Dc4: INTEGER_32 = 20

	Del: INTEGER_32 = 127

	Dle: INTEGER_32 = 16

	Dollar: INTEGER_32 = 36

	Dot: INTEGER_32 = 46

	Doublequote: INTEGER_32 = 34

	Down_arrow: INTEGER_32 = -3

	Eight: INTEGER_32 = 56

	Em: INTEGER_32 = 25

	Enq: INTEGER_32 = 5

	Eot: INTEGER_32 = 4

	Equal_sign: INTEGER_32 = 61

	Esc: INTEGER_32 = 27

	Etb: INTEGER_32 = 23

	Etx: INTEGER_32 = 3

	Exclamation: INTEGER_32 = 33

	First_printable: INTEGER_32 = 32

	Five: INTEGER_32 = 53

	Four: INTEGER_32 = 52

	Fs: INTEGER_32 = 28

	generating_type: TYPE [detachable ASCII]
			-- 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

	Grave_accent: INTEGER_32 = 96

	Greaterthan: INTEGER_32 = 62

	Gs: INTEGER_32 = 29

	Home_arrow: INTEGER_32 = -6

	Ht: INTEGER_32 = 9

	Last_ascii: INTEGER_32 = 127

	Last_printable: INTEGER_32 = 126

	Lbracket: INTEGER_32 = 91

	Lcurly: INTEGER_32 = 40

	Left_arrow: INTEGER_32 = -4

	Lessthan: INTEGER_32 = 60

	Letter_layout: INTEGER_32 = 70

	Line_feed: INTEGER_32 = 10

	Lower_a: INTEGER_32 = 97

	Lower_b: INTEGER_32 = 98

	Lower_c: INTEGER_32 = 99

	Lower_d: INTEGER_32 = 100

	Lower_e: INTEGER_32 = 101

	Lower_f: INTEGER_32 = 102

	Lower_g: INTEGER_32 = 103

	Lower_h: INTEGER_32 = 104

	Lower_i: INTEGER_32 = 105

	Lower_j: INTEGER_32 = 106

	Lower_k: INTEGER_32 = 107

	Lower_l: INTEGER_32 = 108

	Lower_m: INTEGER_32 = 109

	Lower_n: INTEGER_32 = 110

	Lower_o: INTEGER_32 = 111

	Lower_p: INTEGER_32 = 112

	Lower_q: INTEGER_32 = 113

	Lower_r: INTEGER_32 = 114

	Lower_s: INTEGER_32 = 115

	Lower_t: INTEGER_32 = 116

	Lower_u: INTEGER_32 = 117

	Lower_v: INTEGER_32 = 118

	Lower_w: INTEGER_32 = 119

	Lower_x: INTEGER_32 = 120

	Lower_y: INTEGER_32 = 121

	Lower_z: INTEGER_32 = 122

	Minus: INTEGER_32 = 45

	Nak: INTEGER_32 = 21

	Nine: INTEGER_32 = 57

	Nl: INTEGER_32 = 10

	Np: INTEGER_32 = 12

	Nul: INTEGER_32 = 0

	Number_sign: INTEGER_32 = 35

	One: INTEGER_32 = 49

	Opening_brace: INTEGER_32 = 123

	Overflow: INTEGER_32 = -8

	Percent: INTEGER_32 = 37

	Plus: INTEGER_32 = 43

	Questmark: INTEGER_32 = 63

	Rbracket: INTEGER_32 = 93

	Rcurly: INTEGER_32 = 41

	Right_arrow: INTEGER_32 = -5

	Rs: INTEGER_32 = 30

	Semicolon: INTEGER_32 = 59

	Seven: INTEGER_32 = 55

	Si: INTEGER_32 = 15

	Singlequote: INTEGER_32 = 39

	Six: INTEGER_32 = 54

	Slash: INTEGER_32 = 47

	So: INTEGER_32 = 14

	Soh: INTEGER_32 = 1

	Sp: INTEGER_32 = 32

	Star: INTEGER_32 = 42

	Stx: INTEGER_32 = 2

	Sub: INTEGER_32 = 26

	Syn: INTEGER_32 = 22

	Tabulation: INTEGER_32 = 9

	Three: INTEGER_32 = 51

	Tilde: INTEGER_32 = 126

	Two: INTEGER_32 = 50

	Underlined: INTEGER_32 = 95

	Up_arrow: INTEGER_32 = -2

	Upper_a: INTEGER_32 = 65

	Upper_b: INTEGER_32 = 66

	Upper_c: INTEGER_32 = 67

	Upper_d: INTEGER_32 = 68

	Upper_e: INTEGER_32 = 69

	Upper_f: INTEGER_32 = 70

	Upper_g: INTEGER_32 = 71

	Upper_h: INTEGER_32 = 72

	Upper_i: INTEGER_32 = 73

	Upper_j: INTEGER_32 = 74

	Upper_k: INTEGER_32 = 75

	Upper_l: INTEGER_32 = 76

	Upper_m: INTEGER_32 = 77

	Upper_n: INTEGER_32 = 78

	Upper_o: INTEGER_32 = 79

	Upper_p: INTEGER_32 = 80

	Upper_q: INTEGER_32 = 81

	Upper_r: INTEGER_32 = 82

	Upper_s: INTEGER_32 = 83

	Upper_t: INTEGER_32 = 84

	Upper_u: INTEGER_32 = 85

	Upper_v: INTEGER_32 = 86

	Upper_w: INTEGER_32 = 87

	Upper_x: INTEGER_32 = 88

	Upper_y: INTEGER_32 = 89

	Upper_z: INTEGER_32 = 90

	Us: INTEGER_32 = 31

	Vt: INTEGER_32 = 11

	Zero: INTEGER_32 = 48
	
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 alias "≡≡≡" (other: ASCII): 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: ASCII): 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 alias "" (other: ASCII): 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: ASCII)
			-- 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: ASCII)
			-- 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: ASCII
			-- 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: ASCII)
			-- 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: ASCII
			-- 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: ASCII
			-- 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 ASCII
		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 ASCII
			-- 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)
		local
			s: READABLE_STRING_8
		do
			if attached o then
				s := o.out
				if attached {READABLE_STRING_32} s as s32 then
					Io.put_string_32 (s32)
				elseif attached {READABLE_STRING_8} s as s8 then
					Io.put_string (s8)
				else
					Io.put_string_32 (s.as_string_32)
				end
			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 {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_32
			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: ".as_string_32)
				create l_exc;
				l_msg.append (generating_type.name_32);
				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) 1984-2018, 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 ASCII

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