On Fri, 06 Apr 2012 06:22:13 -0700, rusi wrote:
> But are not such cases rare?
They exist, therefore they have to be supported somehow.
> For example code such as:
> print '"'
> print str(something)
> print '"'
>
> could better be written as
> print '"%s"' % str(something)
Not if the text between the delimiters is large.
Consider:
print 'static const char * const data[] = {'
for line in infile:
print '\t"%s",' % line.rstrip()
print '};'
Versus:
text = '\n'.join('\t"%s",' % line.rstrip() for line in infile)
print 'static const char * const data[] = {\n%s\n};' % text
C++11 solves the problem to an extent by providing raw strings with
user-defined delimiters (up to 16 printable characters excluding
parentheses and backslash), e.g.:
R"delim(quote: " backslash: \ rparen: ))delim"
evaluates to the string:
quote: " backslash: \ rparen: )
The only sequence which cannot appear in such a string is )delim" (i.e. a
right parenthesis followed by the chosen delimiter string followed by a
double quote). The delimiter can be chosen either by analysing the string
or by choosing something a string at random and relying upon a collision
being statistically improbable.
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