rishi/scryer-prolog
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add sign/1 (#216) and gcd/2 (#217) as evaluable functors, update the README

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This commit is contained in:
Mark Thom
2019-10-27 13:05:05 -06:00
parent 0fdf0d8d06
commit e656e7fbae
5 changed files with 59 additions and 2 deletions
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src/prolog/arithmetic.rs
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@@ -159,6 +159,7 @@ impl<'a> ArithmeticEvaluator<'a> {
"round" => Ok(ArithmeticInstruction::Round(a1, t)),
"ceiling" => Ok(ArithmeticInstruction::Ceiling(a1, t)),
"floor" => Ok(ArithmeticInstruction::Floor(a1, t)),
"sign" => Ok(ArithmeticInstruction::Sign(a1, t)),
"\\" => Ok(ArithmeticInstruction::BitwiseComplement(a1, t)),
_ => Err(ArithmeticError::NonEvaluableFunctor(
Constant::Atom(name, None),
@@ -192,6 +193,7 @@ impl<'a> ArithmeticEvaluator<'a> {
"xor" => Ok(ArithmeticInstruction::Xor(a1, a2, t)),
"mod" => Ok(ArithmeticInstruction::Mod(a1, a2, t)),
"rem" => Ok(ArithmeticInstruction::Rem(a1, a2, t)),
"gcd" => Ok(ArithmeticInstruction::Gcd(a1, a2, t)),
"atan2" => Ok(ArithmeticInstruction::ATan2(a1, a2, t)),
_ => Err(ArithmeticError::NonEvaluableFunctor(
Constant::Atom(name, None),