savepoint

f.go

@@ -17,8 +17,9 @@ const GENERAL_ERR_MSG = "Valid inputs: 2 || * 2 || / 2 || 2 20 || * 2 20 || / 2
 // Distribution interface
 // https://go.dev/tour/methods/9
 
-type Distribution interface {
+type Dist interface {
 	Samples() []float64
+	Type() string
 }
 
 // Lognormal implementing Distribution
@@ -31,6 +32,9 @@ func (ln Lognormal) Samples() []float64 {
 	sampler := func(r sample.Src) float64 { return sample.Sample_to(ln.low, ln.high, r) }
 	return sample.Sample_parallel(sampler, 1_000_000)
 }
+func (ln Lognormal) Type() string {
+	return "Lognormal"
+}
 
 // Beta implementing Distribution
 type Beta struct {
@@ -41,7 +45,9 @@ type Beta struct {
 func (beta Beta) Samples() []float64 {
 	sampler := func(r sample.Src) float64 { return sample.Sample_beta(beta.a, beta.b, r) }
 	return sample.Sample_parallel(sampler, 1_000_000)
-
+}
+func (beta Beta) Type() string {
+	return "Beta"
 }
 
 // FilledSamples implementing Distribution
@@ -52,6 +58,9 @@ type FilledSamples struct {
 func (fs FilledSamples) Samples() []float64 {
 	return fs.xs
 }
+func (beta FilledSamples) Type() string {
+	return "FilledSamples"
+}
 
 // Actually, I should look up how do do a) enums in go, b) union types
 /*type Lognormal struct {
@@ -60,17 +69,20 @@ func (fs FilledSamples) Samples() []float64 {
 }
 */
 
+/*
 type Dist struct {
 	Type      string
 	Lognormal Lognormal
 	Samples   []float64
 }
+*/
 
 // Parse line into Distribution
 func parseLineErr(err_msg string) (string, Dist, error) {
 	fmt.Println(GENERAL_ERR_MSG)
 	fmt.Println(err_msg)
-	return "", Dist{}, errors.New(err_msg)
+	var errorDist Dist
+	return "", errorDist, errors.New(err_msg)
 }
 func parseLine(line string, vars map[string]Dist) (string, Dist, error) {
 
@@ -103,7 +115,7 @@ func parseLine(line string, vars map[string]Dist) (string, Dist, error) {
 		case var_word_exists:
 			dist = var_word
 		case err1 == nil:
-			dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: single_float, high: single_float}, Samples: nil}
+			dist = Lognormal{low: single_float, high: single_float}
 		case err1 != nil && !var_word_exists:
 			return parseLineErr("Trying to operate on a scalar, but scalar is neither a float nor an assigned variable")
 		}
@@ -113,7 +125,7 @@ func parseLine(line string, vars map[string]Dist) (string, Dist, error) {
 		if err1 != nil || err2 != nil {
 			return parseLineErr("Trying to operate by a distribution, but distribution is not specified as two floats")
 		}
-		dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: new_low, high: new_high}, Samples: nil}
+		dist = Lognormal{low: new_low, high: new_high}
 	default:
 		return parseLineErr("Other input methods not implemented yet")
 	}
@@ -146,6 +158,10 @@ func multiplyBetaDists(beta1 Beta, beta2 Beta) Beta {
 }
 
 func joinDists(old_dist Dist, new_dist Dist, op string) (Dist, error) {
+	switch {
+	}
+
+	/*
 		switch {
 		case old_dist.Type == "Lognormal" && new_dist.Type == "Lognormal" && op == "*":
 			return Dist{Type: "Lognormal", Lognormal: multiplyLogDists(old_dist.Lognormal, new_dist.Lognormal), Samples: nil}, nil
@@ -155,6 +171,7 @@ func joinDists(old_dist Dist, new_dist Dist, op string) (Dist, error) {
 		default:
 			fmt.Printf("For now, can't do anything besides multiplying lognormals\n")
 		}
+	*/
 	return old_dist, errors.New("Can't combine distributions in this way")
 }
 
@@ -196,8 +213,8 @@ func prettyPrintLognormal(low float64, high float64) {
 }
 
 func prettyPrintDist(dist Dist) {
-	if dist.Type == "Lognormal" {
-		prettyPrintLognormal(dist.Lognormal.low, dist.Lognormal.high)
+	if dist.Type() == "Lognormal" {
+		prettyPrintLognormal(dist.low, dist.high)
 	} else {
 		fmt.Printf("%v", dist)
 	}