A Haskell tracer, designed with readability in mind.
For instance given the definition of the sum function:
sum :: [Int] -> Int
sum (x:xs) = x + (sum xs)
sum [] = 0
And an expression to evaluate:
sum [1,2,3,4]
A trace of the execution can be shown by the Stupid Computer as follows:
sum [1, 2, 3, 4]
= 1 + sum [2,3,4]
= 1 + 2 + sum [3,4]
= 1 + 2 + 3 + sum [4]
= 1 + 2 + 3 + 4 + sum []
= 1 + 2 + 3 + 4 + 0
= 1 + 2 + 3 + 4
= 1 + 2 + 7
= 1 + 9
= 10
To download and install run the following commands in your terminal.
git clone https://github.com/alexanderwasey/stupid-computer.git
cd stupid-computer
stack install
And then run the sum examples with
stupid-computer examples/sum.hs , followed by sum [1, 2, 3, 4]
For help run stupid-computer --help
Source can be found at https://github.com/alexanderwasey/stupid-computer