Joseph F. Ryan writes:

 > 
 > The base form for a non-interpolating string is the single-quoted
 > string: 'string'.  However, non-interpolating strings can also be formed
 > with the q[] operator.  The q[] operator allows strings to be made with

Ithink it's actually opposite:

The basic ( user extensible ) form of quoting is  q[ ] or qq[ ] and so 
on with the sintactic sugar of freedom to choose delimiters AND
special syntacric sugar for q//='' qq//="" qw//=<> ( and qx//=`` )




 > any non-space, non-letter, non-digit character as the delimeter instead
 > of '.  In addition, if the starting delimeter is a part of a paired
 > set, such as [, <, or {, then the closing delimeter may be the

.....

 > 
 > =head2 Interpolating Constructs
 > 
 > Interpolating constructs are another form of string in which certain
 > expressions that are embedded into the string are expanded into their
 > value at runtime.  Interpolated strings are formed using the double

I think runtime/compile time is decided not by interpolating construct 
but by the surrounding expression .
probably I can force interpolation at compile time by something
like 

BEGIN{
my $line = "aaa" ;
my $a = "$line\n" ;
}

or 

my $line ::= "aaa" ;
my $a ::= "$line\n" ;


by the way , what happens here ???

my $line = "aaa" ;
my $a ::= "$line\n" ;


in other words , what happens if the interpolation is forced at
compile time while not all variables inside are defined at compile
time ? 


 > quote: "string".  In addition, qq[] is a synonym for "", similarly to
 > q[] being a synoynm for ''.  The rules for interpolation are as
 > follows:
 > 
 > =head3 Interpolation Rules

....


arcadi 

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