17 Nov
2007
17 Nov
'07
11:10 a.m.
Stefan O'Rear wrote:
On Sat, Nov 17, 2007 at 04:01:34PM +0000, Andrew Coppin wrote:
Suppose I write something like this:
foo :: [Int] foo = concat (replicate 4 [4,7,2,9])
The value of "foo" is completely determined at compile-time. So, will the compiler generate calls to concat and replicate, or will it just insert a large list constant here?
The compiler will generate calls to concat and replicate.
OK. I presume this is due to the fact that the result of executing an expression at compile-time could be arbitrarily large? Are there any buttons that can be twiddled to control this behaviour? For that matter, when I say "[4,7,2,9]", what does that compile into? Some data structures in memory? Or code to actually build said structures?