Integer

From Erights

(Difference between revisions)
Jump to: navigation, search
(mention guard, etc)
Line 1: Line 1:
-
[[Integer]] is one of the built-in numeric types in [[ELib]]. Integers may be literals in [[E language]] source.
+
[[Integer]] is one of the built-in numeric types in [[ELib]].  
-
 
+
-
In the [[universal environment]], the Integer guard is named <code>int</code>.
+
==Maker protocol==
==Maker protocol==
Line 14: Line 12:
<var>string</var> must contain only an optional leading minus sign "-" (U+002D), followed by at least one digit of the specified base ("0"-"9" for bases up to 10, then "a"-"z" or "A"-"Z" for additional digits up to base 36).
<var>string</var> must contain only an optional leading minus sign "-" (U+002D), followed by at least one digit of the specified base ("0"-"9" for bases up to 10, then "a"-"z" or "A"-"Z" for additional digits up to base 36).
-
 
-
==Tests==
 
-
 
-
Many E implementations have multiple representations of Integers for different size ranges. These implementations ''must'' be indistinguishable, or there must be exactly one representation for any given integer.
 
-
 
-
? def a := 4
 
-
# value: 4
 
-
 
-
? def b := (400000000000000000000 // 100000000000000000000)
 
-
# value: 4
 
-
 
-
? a == b
 
-
# value: true
 
-
 
-
? a.__getAllegedType()
 
-
# value: int
 
-
 
-
? b.__getAllegedType()
 
-
# value: int
 
-
 
-
? 400000000000000000000.__getAllegedType()
 
-
# value: int
 
[[Category:ELib specification]]
[[Category:ELib specification]]
{{stub}}
{{stub}}

Revision as of 17:25, 18 March 2009

Integer is one of the built-in numeric types in ELib.

Maker protocol

run/1

run(string :String) :Integer

Equivalent to thisInteger.run(string, 10).

run/2

run(string :String, base :(0..36)) :Integer

Convert string to an integer. If it does not match the following syntax then an exception is thrown. XXX If sealed throw is accepted, then there must be a way to supply an ejector to handle failure here.


string must contain only an optional leading minus sign "-" (U+002D), followed by at least one digit of the specified base ("0"-"9" for bases up to 10, then "a"-"z" or "A"-"Z" for additional digits up to base 36).

This page is a stub; it should be expanded with more information. If doing so, check the original E web site and the mailing list archives for content which could be moved into this page.
Personal tools
more tools