Identifiers
Lexer:
IDENTIFIER_OR_KEYWORD :
XID_start XID_continue*
|_
XID_continue+RAW_IDENTIFIER :
r#
IDENTIFIER_OR_KEYWORD Exceptcrate
,self
,super
,Self
NON_KEYWORD_IDENTIFIER : IDENTIFIER_OR_KEYWORD Except a strict or reserved keyword
IDENTIFIER :
NON_KEYWORD_IDENTIFIER | RAW_IDENTIFIER
An identifier is any nonempty Unicode string of the following form:
Either
- The first character has property
XID_start
. - The remaining characters have property
XID_continue
.
Or
- The first character is
_
. - The identifier is more than one character.
_
alone is not an identifier. - The remaining characters have property
XID_continue
.
Note:
XID_start
andXID_continue
as character properties cover the character ranges used to form the more familiar C and Java language-family identifiers.
A raw identifier is like a normal identifier, but prefixed by r#
. (Note that
the r#
prefix is not included as part of the actual identifier.)
Unlike a normal identifier, a raw identifier may be any strict or reserved
keyword except the ones listed above for RAW_IDENTIFIER
.