Switch to add/remove instruction mutation

gen/instruction.go

@@ -2,13 +2,13 @@ package gen
 
 import "github.com/firestuff/subcoding/vm"
 
-func randInstruction(prog *vm.Program) *vm.Instruction {
+func RandInstruction(prog *vm.Program) *vm.Instruction {
 	instr := &vm.Instruction{
-		OpCode: randOpCode(),
+		OpCode: RandOpCode(),
 	}
 
 	for i, t := range vm.OperandsByOpCode[instr.OpCode] {
-		instr.Operands[i] = randOperand(prog, t)
+		instr.Operands[i] = RandOperand(prog, t)
 	}
 
 	return instr

gen/opcode.go

@@ -48,7 +48,7 @@ var opCodes = []vm.OpCodeType{
 	vm.OpSqrt,
 }
 
-func randOpCode() vm.OpCodeType {
+func RandOpCode() vm.OpCodeType {
 	// Uniform distribution
 	return opCodes[rand.Intn(len(opCodes))]
 }

gen/operand.go

@@ -4,7 +4,7 @@ import "math/rand"
 
 import "github.com/firestuff/subcoding/vm"
 
-func randOperand(prog *vm.Program, t vm.OperandNumericType) *vm.Operand {
+func RandOperand(prog *vm.Program, t vm.OperandNumericType) *vm.Operand {
 	for {
 		op := &vm.Operand{
 			Type: randOperandType(),

gen/program.go

@@ -1,19 +0,0 @@
-package gen
-
-import "github.com/firestuff/subcoding/vm"
-
-func RandProgram(globalMemorySize, functionMemorySize, instructionLimit uint64) *vm.Program {
-	prog := &vm.Program{
-		GlobalMemorySize:   globalMemorySize,
-		FunctionMemorySize: functionMemorySize,
-		InstructionLimit:   instructionLimit,
-	}
-
-	prog.Functions = append(prog.Functions, &vm.Function{
-		Instructions: []*vm.Instruction{
-			randInstruction(prog),
-		},
-	})
-
-	return prog
-}