continue with new parser
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parent
de72432c53
commit
29ea338112
44
f2.go
44
f2.go
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@ -4,10 +4,9 @@ import (
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"bufio"
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"errors"
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"fmt"
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// "math"
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"math"
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"os"
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// "strconv"
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"strconv"
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"strings"
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)
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@ -25,40 +24,51 @@ type Dist struct {
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Samples []float64
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}
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// Parse line into Distribution,
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// Parse line into Distribution
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func parseLineErr(err_msg string) (string, Dist, error) {
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return "", Dist{}, errors.New(err_msg)
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}
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func parseLine(line string) (string, Dist, error) {
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words := strings.Split(strings.TrimSpace(line), " ")
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op = ""
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op := ""
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var dist Dist
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switch words[0] {
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case "*":
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op = "*"
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words = words[1:]
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case "/":
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op = "/"
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words = words[1:]
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case "+":
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return "", Dist{}, error.New("+ operation not implemented yet")
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return parseLineErr("+ operation not implemented yet")
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case "-":
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return "", Dist{}, error.New("- operation not implemented yet")
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return parseLineErr("- operation not implemented yet")
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default:
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return "", Dist{}, error.New("operation not recognized")
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op = "*" // later, change the below to
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}
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switch len(words) {
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case 0:
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return parseLineErr("Can't operate on nothing")
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case 1:
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return "", Dist{}, error.New("Can't operate on nothing")
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case 2:
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single_float, err1 := strconv.ParseFloat(words[1], 64)
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single_float, err1 := strconv.ParseFloat(words[0], 64)
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if err1 != nil {
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fmt.Println("Trying to operate on a scalar, but scalar is not a float")
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fmt.Println(error_msg_cont)
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continue EventForLoop
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}
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new_low = single_float
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new_high = single_float
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dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: single_float, high: single_float}, Samples: nil}
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case 2:
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new_low, err1 := strconv.ParseFloat(words[0], 64)
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new_high, err2 := strconv.ParseFloat(words[1], 64)
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if err1 != nil || err2 != nil {
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return parseLineErr("Trying to operate by a distribution, but distribution is not specified as two floats")
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}
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dist = Dist{Type: "Lognormal", Lognormal: Lognormal{low: new_low, high: new_high}, Samples: nil}
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default:
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return parseLineErr("Other input methods not implemented yet")
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}
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return op, dist, nil
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}
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@ -94,7 +104,7 @@ func joinDists(old_dist Dist, new_dist Dist, op string) (Dist, error) {
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switch {
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case old_dist.Type == "Lognormal" && new_dist.Type == "Lognormal" && op == "*":
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low, high := multiplyLogBounds(old_dist.Lognormal.low, old_dist.Lognormal.high, new_dist.Lognormal.low, new_dist.Lognormal.high)
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return Dist{Type: "Lognormal", Lognormal: Lognormal{low: low, high: high}, Samples: nil}
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return Dist{Type: "Lognormal", Lognormal: Lognormal{low: low, high: high}, Samples: nil}, nil
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default:
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fmt.Printf("For now, can't do anything besides multiplying lognormals")
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}
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