node: implement *expr.Ternary (a hoisting pass would be better)

node.go

@@ -1090,6 +1090,25 @@ func (this *conversionState) convertNoFreeFloating(n_ node.Node) (string, error)
 
 		return "!(" + rhs + ")", nil
 
+	case *expr.Ternary:
+		cond, err := this.convert(n.Condition)
+		if err != nil {
+			return "", parseErr{n, err}
+		}
+
+		iftrue, err := this.convert(n.IfTrue)
+		if err != nil {
+			return "", parseErr{n, err}
+		}
+
+		iffalse, err := this.convert(n.IfFalse)
+		if err != nil {
+			return "", parseErr{n, err}
+		}
+
+		// FIXME this is (A) not idiomatic, and (B) doesn't work in assignment expressions
+		return "(func() unknown {\nif (" + cond + ") {\nreturn (" + iftrue + ")\n} else {\nreturn (" + iffalse + ")\n } })()", nil
+
 	case *expr.ArrayDimFetch:
 		// Might be x[foo], might be x[] (i.e. append() call)
 		// In order to make the append() transformation, we need to lookahead