master > master: codego - iff

2021-05-15 00:05:03 +02:00
parent 9b225b0551
commit 79bfcf57bb
5 changed files with 24 additions and 4 deletions
--- a/codego/aussagenlogik/schema/schema.go
+++ b/codego/aussagenlogik/schema/schema.go
@@ -139,6 +139,11 @@ func (ant antlrTree) toFormula() formulae.Formula {
 		if nChildren == 3 {
 			return formulae.Implies(subants[0].toFormula(), subants[2].toFormula())
 		}
+	case "iff":
+		// NOTE: expr = expr <=> expr
+		if nChildren == 3 {
+			return formulae.DoubleImplication(subants[0].toFormula(), subants[2].toFormula())
+		}
 	case "and", "or":
 		// NOTE: expr = expr op expr op ... op expr
 		var n int = int((len(subants) + 1) / 2)