blob: 63f73d2ccb70417dd5e4ff14cb986a9f072f2f5d (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
{-# LANGUAGE ImplicitParams, RankNTypes #-}
{-# OPTIONS_GHC -dcore-lint #-}
module Main where
import GHC.Exception
import GHC.Types
f0 = putStrLn $ showCallStack ?loc
-- should just show the location of ?loc
f1 :: (?loc :: CallStack) => IO ()
f1 = putStrLn $ showCallStack ?loc
-- should show the location of ?loc *and* f1's call-site
f2 :: (?loc :: CallStack) => IO ()
f2 = do putStrLn $ showCallStack ?loc
putStrLn $ showCallStack ?loc
-- each ?loc should refer to a different location, but they should
-- share f2's call-site
f3 :: ((?loc :: CallStack) => () -> IO ()) -> IO ()
f3 x = x ()
-- the call-site for the functional argument should be added to the
-- stack..
f4 :: (?loc :: CallStack) => ((?loc :: CallStack) => () -> IO ()) -> IO ()
f4 x = x ()
-- as should the call-site for f4 itself
f5 :: (?loc1 :: CallStack) => ((?loc2 :: CallStack) => () -> IO ()) -> IO ()
f5 x = x ()
-- we only push new call-sites onto CallStacks with the name IP name
f6 :: (?loc :: CallStack) => Int -> IO ()
f6 0 = putStrLn $ showCallStack ?loc
f6 n = f6 (n-1)
-- recursive functions add a SrcLoc for each recursive call
main = do f0
f1
f2
f3 (\ () -> putStrLn $ showCallStack ?loc)
f4 (\ () -> putStrLn $ showCallStack ?loc)
f5 (\ () -> putStrLn $ showCallStack ?loc3)
f6 5
|
