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Comparison ops.

This commit is contained in:
sforman 2023-07-29 11:07:50 -07:00
parent 36dc5b619f
commit a69b988684
1 changed files with 28 additions and 0 deletions
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28
implementations/Elm/src/Joy.elm
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@ -46,6 +46,14 @@ joy_eval symbol stack expression =
"/" -> joy_binary_math_op (//) stack expression
"%" -> joy_binary_math_op (modBy) stack expression
"<" -> joy_comparison_op (<) stack expression
">" -> joy_comparison_op (>) stack expression
"<=" -> joy_comparison_op (<=) stack expression
">=" -> joy_comparison_op (>=) stack expression
"<>" -> joy_comparison_op (/=) stack expression
"!=" -> joy_comparison_op (/=) stack expression
"=" -> joy_comparison_op (==) stack expression
"and" -> joy_binary_math_op (Bitwise.and) stack expression
"or" -> joy_binary_math_op (Bitwise.or) stack expression
"xor" -> joy_binary_math_op (Bitwise.xor) stack expression
@ -122,6 +130,18 @@ joy_binary_math_op op stack expression =
Err msg -> Err msg
Err msg -> Err msg
joy_comparison_op : (Int -> Int -> Bool) -> JList -> JList -> Result String (JList, JList)
joy_comparison_op op stack expression =
case pop_int(stack) of
Ok (a, s0) ->
case pop_int(s0) of
Ok (b, s1) ->
Ok ((push_bool (op b a) s1), expression)
Err msg -> Err msg
Err msg -> Err msg
joy_concat : JList -> JList -> Result String (JList, JList)
joy_concat stack expression =
case pop_list(stack) of
@ -222,6 +242,14 @@ joy_truthy stack expression =
Err msg -> Err msg
push_bool : Bool -> JList -> JList
push_bool flag stack =
if flag then
JoyTrue :: stack
else
JoyFalse :: stack
push_int : Int -> JList -> JList
push_int i stack = (JoyInt i) :: stack