is Ascii Alnum Code(cp: int) - > bool- 수신자
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Declaration and parameters
링크사용 조건
기본 포함 · 미정
Import std.parser in language mode 5.21.
The current compiler selects std/parser.tpz for this language mode. Availability in other released editions and inclusion in each installed distribution are Pending.
수신자
매개변수 제약
is returns true for integers from 48 through 57, inclusive. These are the ASCII digits from 0 through 9.
is returns true for integers from 65 through 90 or from 97 through 122, inclusive. These are ASCII uppercase and lowercase letters.
is returns true when the digit predicate or the letter predicate returns true.
is returns true for 9, 10, 11, 12, 13, and 32. These represent tab, line feed, vertical tab, form feed, carriage return, and space.
Every other int returns false. Negative values, surrogate code values, non ASCII characters, and integers above the Unicode range do not cause a diagnostic.
Each call evaluates its input once. Classification has no side effects and does not consult a locale, normalize text, or fold case.
관련 규칙 · Classify integer ASCII codes →결과
효과
실패
Result and effects
링크Classify the integer with the exact ASCII set in the integer classification contract. Values outside that set return false.
Related entries
링크Classify integer ASCII codes
링크Classify integer ASCII codes
is returns true for integers from 48 through 57, inclusive. These are the ASCII digits from 0 through 9.
is returns true for integers from 65 through 90 or from 97 through 122, inclusive. These are ASCII uppercase and lowercase letters.
is returns true when the digit predicate or the letter predicate returns true.
is returns true for 9, 10, 11, 12, 13, and 32. These represent tab, line feed, vertical tab, form feed, carriage return, and space.
Every other int returns false. Negative values, surrogate code values, non ASCII characters, and integers above the Unicode range do not cause a diagnostic.
Each call evaluates its input once. Classification has no side effects and does not consult a locale, normalize text, or fold case.
이유
Exact integer sets make ASCII parsing independent of host text rules. A false result handles a value outside the class without introducing an error channel.
Include each ASCII endpoint and exclude its neighbors
링크import std.parserimport std.iofor cp in ([47, 48, 57, 58, 64, 65, 90, 91, 96, 97, 122, 123, 8, 9, 10, 11, 12, 13, 14, 31, 32, 33]) {let digit = parser.isAsciiDigitCode(cp)let alpha = parser.isAsciiAlphaCode(cp)let alnum = parser.isAsciiAlnumCode(cp)let space = parser.isAsciiWhitespaceCode(cp)io.writeLine("{digit}/{alpha}/{alnum}/{space}")}
false/false/false/false
true/false/true/false
true/false/true/false
false/false/false/false
false/false/false/false
false/true/true/false
false/true/true/false
false/false/false/false
false/false/false/false
false/true/true/false
false/true/true/false
false/false/false/false
false/false/false/false
false/false/false/true
false/false/false/true
false/false/false/true
false/false/false/true
false/false/false/true
false/false/false/false
false/false/false/false
false/false/false/true
false/false/false/false
기대 결과
기대 결과
실행을 마칩니다. 종료 코드 0.
false/false/false/falsetrue/false/true/falsetrue/false/true/falsefalse/false/false/falsefalse/false/false/falsefalse/true/true/falsefalse/true/true/falsefalse/false/false/falsefalse/false/false/falsefalse/true/true/falsefalse/true/true/falsefalse/false/false/falsefalse/false/false/falsefalse/false/false/truefalse/false/false/truefalse/false/false/truefalse/false/false/truefalse/false/false/truefalse/false/false/falsefalse/false/false/falsefalse/false/false/truefalse/false/false/false
Return false for invalid code points and non ASCII values
링크import std.parserimport std.iofor cp in ([-1, 128, 233, 55296, 1114112, 9223372036854775807]) {let digit = parser.isAsciiDigitCode(cp)let alpha = parser.isAsciiAlphaCode(cp)let alnum = parser.isAsciiAlnumCode(cp)let space = parser.isAsciiWhitespaceCode(cp)io.writeLine("{digit}/{alpha}/{alnum}/{space}")}
false/false/false/false
false/false/false/false
false/false/false/false
false/false/false/false
false/false/false/false
false/false/false/false
기대 결과
기대 결과
실행을 마칩니다. 종료 코드 0.
false/false/false/falsefalse/false/false/falsefalse/false/false/falsefalse/false/false/falsefalse/false/false/falsefalse/false/false/false