Would you consider the ICU4J method com.ibm.icu.text.UTF16.charAt [1] to be in violation of C1 because it can return surrogate code points?
Or the ICU4J method com.ibm.icu.lang.UCharacter.isUUppercase [2] because it's a predicate that tells you that surrogate code points do not represent upper case characters? Or the ICU4J method com.ibm.icu.lang.UCharacter.toUpperCase [3] because it's a transform that maps surrogate code points to themselves as their upper case form? Norbert [1] http://icu-project.org/apiref/icu4j/com/ibm/icu/text/UTF16.html#charAt(java.lang.CharSequence,%20int) [2] http://icu-project.org/apiref/icu4j/com/ibm/icu/lang/UCharacter.html#isUUppercase(int) [3] http://icu-project.org/apiref/icu4j/com/ibm/icu/lang/UCharacter.html#toUpperCase(int) On Mar 26, 2012, at 23:11 , Glenn Adams wrote: > > On Mon, Mar 26, 2012 at 10:37 PM, Norbert Lindenberg > <[email protected]> wrote: > The conformance clause doesn't say anything about the interpretation of > (UTF-16) code units as code points. To check conformance with C1, you have to > look at how the resulting code points are actually further interpreted. > > True, but if the proposed language > > "A code unit that is in the range 0xD800 to 0xDFFF, but is not part of a > surrogate pair, is interpreted as a code point with the same value." > > is adopted, then will not this have an effect of creating unpaired surrogates > as code points? If so, then by my estimation, this will increase the > likelihood of their being interpreted as abstract characters... e.g., if the > unpaired code unit is interpreted as a unpaired surrogate code point, and > some process/function performs any predicate or transform on that code point, > then that amounts to interpreting it as an abstract character. > > I would rather see such unpaired code unit either (1) be mapped to U+00FFFD, > or (2) an exception raised when performing an operation that requires > conversion of the UTF-16 code unit sequence. _______________________________________________ es-discuss mailing list [email protected] https://mail.mozilla.org/listinfo/es-discuss
