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std.utf8.valid_scalar?

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fn pub valid_scalar?(value: Int) -> Bool {
  value >= 0 and value <= MAX_CODEPOINT and (value < 0xD800 or value > 0xDFFF)
}
fn pub static valid_scalar?(value: Int) -> Bool

Returns true if the given Int is a valid Unicode scalar value.

Examples

import std.utf8

utf8.valid_scalar?(0x5C) # => true
utf8.valid_scalar?(0xDFFF) # => false