Article View: comp.std.c
Article #3907Re: Placement of string literals
From: Tanmoy Bhattacharya
Date: Sun, 03 Sep 1995 15:42
Date: Sun, 03 Sep 1995 15:42
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1837 bytes
In article <42c4uu$9e5@sparcserver.lrz-muenchen.de>, ua302aa@sun2.lrz-muenchen.de (Kurt Watzka) writes: <snip> |> In other words, what is wrong with the statement: "String literals |> are arrays of const char, and hence may be placed in a read only |> region of storage, even if they are used to initialize a non const |> char *"? String literals are not arrays of const char. They are arrays of char, unambiguously (6.1.4). They decay to `pointer to char' (and _not_ `pointer to const char') whereby they can be assigned to both (char*) and to (const char*) objects without _requiring_ any diagnostics. They may however be placed in read only memory because (6.1.4) an attempt to modify a string literal results in undefined behaviour. By the very nature of undefined behaviour(3.16), they _need not_ be placed in read only memory: or be so placed only if used in a context where a `const char[]' is allowed. Cheers Tanmoy -- tanmoy@qcd.lanl.gov(128.165.23.46) DECNET: BETA::"tanmoy@lanl.gov"(1.218=1242) Tanmoy Bhattacharya O:T-8(MS B285)LANL,NM87544-0285,USA H:#3,802,9 St,NM87545 Others see <gopher://yaleinfo.yale.edu:7700/00/Internet-People/internet-mail>, <http://alpha.acast.nova.edu/cgi-bin/inmgq.pl>or<ftp://csd4.csd.uwm.edu/pub/ internetwork-mail-guide>. -- <http://nqcd.lanl.gov/people/tanmoy/tanmoy.html> fax: 1 (505) 665 3003 voice: 1 (505) 665 4733 [ Home: 1 (505) 662 5596 ]
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Path: arc1-ca.pugleaf.net!qcd.lanl.gov!tanmoy From: tanmoy@qcd.lanl.gov (Tanmoy Bhattacharya) Newsgroups: comp.std.c Subject: Re: Placement of string literals Date: 3 Sep 1995 15:42:17 GMT Organization: Los Alamos National Laboratory Distribution: world Message-ID: <42cicp$aoa@newshost.lanl.gov> References: <42c4uu$9e5@sparcserver.lrz-muenchen.de> NNTP-Posting-Host: qcd.lanl.gov Keywords: string literals, const