2.3 Identifiers
1
Syntax
2/2
3/2
identifier_start ::=
letter_uppercase
|
letter_lowercase
|
letter_titlecase
|
letter_modifier
|
letter_other
|
number_letter
3.1/3
identifier_extend ::=
mark_non_spacing
|
mark_spacing_combining
|
number_decimal
|
punctuation_connector
4/3
An
identifier
shall not contain two consecutive characters in category
punctuation_connector,
or end with a character in that category.
Static Semantics
5/3
Two
identifiers
are considered the same if they consist of the same sequence of characters
after applying locale-independent simple case folding, as defined by
documents referenced in the note in section 1 of ISO/IEC 10646:2011.
5.3/3
After applying simple case folding, an
identifier
shall not be identical to a reserved word.
Implementation Permissions
6
In a nonstandard mode, an implementation may support
other upper/lower case equivalence rules for
identifiers,
to accommodate local conventions.
6.1/2
2
Identifiers
differing only in the use of corresponding upper and lower case letters
are considered the same.
Examples
7
Examples of identifiers:
8/2
Count X Get_Symbol Ethelyn Marion
Snobol_4 X1 Page_Count Store_Next_Item
Πλάτων -- Plato
Чайковский -- Tchaikovsky
θ φ -- Angles
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