2.6 String Literals
1
A
string_literal is formed
by a sequence of graphic characters (possibly none) enclosed between
two quotation marks used as string brackets. They are used to represent
operator_symbols (see
6.1),
values of a string type (see
4.2), and array
subaggregates (see
4.3.3).
Syntax
2
string_literal ::= "{
string_element}"
3
string_element ::= "" |
non_quotation_mark_graphic_character
4
A string_element
is either a pair of quotation marks (""), or a single graphic_character
other than a quotation mark.
Static Semantics
5
The
sequence of characters
of a
string_literal is formed from the sequence
of
string_elements between the bracketing
quotation marks, in the given order, with a
string_element
that is "" becoming a single quotation mark in the sequence
of characters, and any other
string_element
being reproduced in the sequence.
6
A
null string literal
is a
string_literal with no
string_elements
between the quotation marks.
7
6 An end of line cannot appear in a string_literal.
7.1/2
7 No transformation is performed on the
sequence of characters of a string_literal.
Examples
8
Examples of string
literals:
9/2
"Message of the day:"
"" -- a null string literal
" " "A" """" -- three string literals of length 1
"Characters such as $, %, and } are allowed in string literals"
"Archimedes said ""Εύρηκα"""
"Volume of cylinder (πr²h) = "
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