ghc - Continuation versus call stack in Haskell -


how haskell (ghc) runtime know code should executed next after evaluation of thunk?

on conceptual level, how different call stack in other programming languages (other storing closed variables on heap , having tail recursion)?

ghc (or rather, ghc rts) has normal call stack, things.

what's different contents of stack. doesn't match might expect.

suppose function foo calls function bar calls function baz. might expecting call stack like

foo bar baz

at point. actually, when foo calls bar, "call" create thunk , return instantly. bar doesn't appear on stack @ point. when foo returns data caller, , caller decides it, @ point bar may appear on call stack, though foo seen.

in short, order of stuff on call stack unrelated calls who. it's determined looks @ what.


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