style: remove duplicate nil checking procedures

engine/vm.go

@@ -76,73 +76,46 @@ type VM struct {
 
 // Register0 registers a predicate of arity 0.
 func (vm *VM) Register0(name Atom, p Predicate0) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 0}, p)
 }
 
 // Register1 registers a predicate of arity 1.
 func (vm *VM) Register1(name Atom, p Predicate1) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 1}, p)
 }
 
 // Register2 registers a predicate of arity 2.
 func (vm *VM) Register2(name Atom, p Predicate2) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 2}, p)
 }
 
 // Register3 registers a predicate of arity 3.
 func (vm *VM) Register3(name Atom, p Predicate3) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 3}, p)
 }
 
 // Register4 registers a predicate of arity 4.
 func (vm *VM) Register4(name Atom, p Predicate4) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 4}, p)
 }
 
 // Register5 registers a predicate of arity 5.
 func (vm *VM) Register5(name Atom, p Predicate5) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 5}, p)
 }
 
 // Register6 registers a predicate of arity 6.
 func (vm *VM) Register6(name Atom, p Predicate6) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 6}, p)
 }
 
 // Register7 registers a predicate of arity 7.
 func (vm *VM) Register7(name Atom, p Predicate7) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 7}, p)
 }
 
 // Register8 registers a predicate of arity 8.
 func (vm *VM) Register8(name Atom, p Predicate8) {
-	if vm.procedures == nil {
-		vm.procedures = orderedmap.New[procedureIndicator, procedure]()
-	}
 	vm.setProcedure(procedureIndicator{name: name, arity: 8}, p)
 }