Switch to add/remove instruction mutation

grow/definition.go

@@ -4,7 +4,6 @@ import "io"
 
 import "gopkg.in/yaml.v2"
 
-import "github.com/firestuff/subcoding/gen"
 import "github.com/firestuff/subcoding/vm"
 
 type Definition struct {
@@ -37,10 +36,19 @@ func (def *Definition) Grow(statusChan chan<- Status) (*vm.Program, error) {
 		statusChan <- status
 	}
 
+	prog := &vm.Program{
+		GlobalMemorySize:   def.GlobalMemorySize,
+		FunctionMemorySize: def.FunctionMemorySize,
+		InstructionLimit:   def.InstructionLimit,
+		Functions: []*vm.Function{
+			&vm.Function{},
+		},
+	}
+
 	for {
 		status.Attempts++
 
-		prog := gen.RandProgram(def.GlobalMemorySize, def.FunctionMemorySize, def.InstructionLimit)
+		Mutate(prog)
 
 		score, err := def.score(prog)
 		if err != nil {