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Issue #10542: Document that identifiers use XID_Start XID_Continue*.

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Martin v. Löwis 2010-12-30 08:36:37 +00:00
parent 627284c67f
commit 0dbebc02ed
1 changed files with 5 additions and 1 deletions
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Doc/reference/lexical_analysis.rst
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@ -292,9 +292,11 @@ Unicode Character Database as included in the :mod:`unicodedata` module.
Identifiers are unlimited in length. Case is significant.
.. productionlist::
identifier: `id_start` `id_continue`*
identifier: `xid_start` `xid_continue`*
id_start: <all characters in general categories Lu, Ll, Lt, Lm, Lo, Nl, the underscore, and characters with the Other_ID_Start property>
id_continue: <all characters in `id_start`, plus characters in the categories Mn, Mc, Nd, Pc and others with the Other_ID_Continue property>
xid_start: <all characters in `id_start` whose NFKC normalization is in "id_start xid_continue*">
xid_continue: <all characters in `id_continue` whose NFKC normalization is in "id_continue*">
The Unicode category codes mentioned above stand for:
@ -308,6 +310,8 @@ The Unicode category codes mentioned above stand for:
* *Mc* - spacing combining marks
* *Nd* - decimal numbers
* *Pc* - connector punctuations
* *Other_ID_Start* - explicit list of characters in `PropList.txt <http://unicode.org/Public/UNIDATA/PropList.txt>`_ to support backwards compatibility
* *Other_ID_Continue* - likewise
All identifiers are converted into the normal form NFKC while parsing; comparison
of identifiers is based on NFKC.