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core: added char::is_digit (matching Nd, Nl, No)

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This commit is contained in:
Kevin Cantu 2012-02-08 01:52:09 -08:00
parent b3444db161
commit 5c58dde2f8
1 changed files with 19 additions and 1 deletions
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20
src/libcore/char.rs
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@ -85,10 +85,18 @@ pure fn is_alphanumeric(c: char) -> bool {
unicode::general_category::No(c);
}
#[doc( brief = "Indicates whether the character is an ASCII character" )]
pure fn is_ascii(c: char) -> bool {
c - ('\x7F' & c) == '\x00'
}
#[doc( brief = "Indicates whether the character is numeric (Nd, Nl, or No)" )]
pure fn is_digit(c: char) -> bool {
ret unicode::general_category::Nd(c) ||
unicode::general_category::Nl(c) ||
unicode::general_category::No(c);
}
#[doc(
brief = "Convert a char to the corresponding digit. \
Safety note: This function fails if `c` is not a valid char",
@ -227,8 +235,18 @@ fn test_to_upper() {
}
#[test]
fn test_ascii() unsafe {
fn test_is_ascii() unsafe {
assert str::all("banana", char::is_ascii);
assert ! str::all("ประเทศไทย中华Việt Nam", char::is_ascii);
}
#[test]
fn test_is_digit() {
assert is_digit('2');
assert is_digit('7');
assert ! is_digit('c');
assert ! is_digit('i');
assert ! is_digit('z');
assert ! is_digit('Q');
}