Subject: [sv-bc] Hex escape codes in string literals
From: Rishiyur S. Nikhil (nikhil@bluespec.com)
Date: Wed Feb 04 2004 - 08:31:35 PST
Background from V2K:
The the V2K LRM, "Section 2.6.3 Special characters in strings" says
that the \ddd escape can have from 1-3 octal digits.
But what if we want a string where the escaped character is
followed immediately by a literal octal character? How to avoid
the literal octal character from being part of the escape code?
E.g., a string containing the following characters:
'a' 'b' '\o7' '1'
can't be written as: "ab\o71" (means 'a' 'b' '\o71' ?)
No problem: since the escape code has a maximum of 3 octal digits,
we can use 3 digits for the escape code to ``push out'' the
following literal octal digit beyond the code:
"ab\o0071"
Issue in SV:
In the SV LRM, "Section 2.6 String literals", says:
SystemVerilog adds the following special string characters:
...
\x02 hex number
but does not specify the number of hex digits required (exactly 2?
from 1-2? any number of hex digits?).
I suggest specifying that it must be 1 or 2 hex digits.
Nikhil
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