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1 | package pge
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2 |
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3 | import (
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4 | // "fmt"
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5 | "sort"
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6 |
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7 | expr "github.com/verdverm/go-symexpr"
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8 | )
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9 |
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10 | func (PS *PgeSearch) ExpandMethod3(O expr.Expr) (ret []expr.Expr) {
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11 | O.Sort()
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12 | ret = make([]expr.Expr, 0)
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13 | // fmt.Printf("Expanding expression: %v\n", O)
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14 |
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15 | add := O.(*expr.Add)
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16 |
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17 | // adding term to addition
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18 | for _, B := range PS.ffxBases {
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19 | found := false
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20 | for _, C := range add.CS {
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21 | // fmt.Printf("checking %v in %v\n", B, add)
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22 | if C.AmISame(B) {
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23 | // fmt.Println("found\n\n")
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24 | found = true
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25 | break
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26 | }
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27 | }
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28 | if !found {
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29 | e := O.Clone()
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30 | a := e.(*expr.Add)
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31 | a.Insert(B.Clone())
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32 | sort.Sort(a)
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33 | a.CalcExprStats()
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34 | good := PS.cnfg.treecfg.CheckExpr(a)
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35 | if good {
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36 | ret = append(ret, a)
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37 | }
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38 | // fmt.Printf("grew %v\n\n", a)
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39 | // ret = append(ret, a)
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40 | }
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41 | }
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42 |
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43 | // extending terms in addition
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44 | for _, B := range PS.ffxBases {
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45 | for i, C := range add.CS {
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46 | if C.ExprType() == expr.MUL {
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47 | m := C.(*expr.Mul)
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48 | if len(m.CS) > 3 {
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49 | continue
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50 | }
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51 | }
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52 | e := O.Clone()
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53 | a := e.(*expr.Add)
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54 | mul := expr.NewMul()
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55 | mul.Insert(a.CS[i])
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56 | mul.Insert(B.Clone())
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57 | a.CS[i] = mul
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58 | sort.Sort(a)
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59 | a.CalcExprStats()
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60 | good := PS.cnfg.treecfg.CheckExpr(a)
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61 | if good {
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62 | ret = append(ret, a)
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63 | }
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64 | // fmt.Printf("grew %v\n\n", a)
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65 | ret = append(ret, a)
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66 | }
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67 | }
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68 |
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69 | // fmt.Println("Len of ret = ", len(ret))
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70 | return ret
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71 | }
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