Merge pull request #146 from projectdiscovery/maint-ptr

Adding safe dereferencing helper

.gitignore

@@ -0,0 +1,4 @@
+.idea
+.vscode
+*.exe
+

ptr/ptr.go

@@ -0,0 +1,11 @@
+package ptr
+
+// Safe dereferences safely a pointer
+// - if the pointer is nil => returns the zero value of the type of the pointer if nil
+// - if the pointer is not nil => returns the dereferenced pointer
+func Safe[T any](v *T) T {
+	if v == nil {
+		return *new(T)
+	}
+	return *v
+}

ptr/ptr_test.go

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+package ptr
+
+import (
+	"github.com/stretchr/testify/require"
+	"testing"
+)
+
+func TestSafe(t *testing.T) {
+	type args[T any] struct {
+		v *T
+	}
+	type testCase[T any] struct {
+		name string
+		args args[T]
+		want T
+	}
+	tests := []testCase[int]{
+		{
+			name: "struct=>int - NilPointer",
+			args: args[int]{v: nil},
+			want: 0,
+		},
+		{
+			name: "struct=>int - NonNilPointer",
+			args: args[int]{v: new(int)},
+			want: 0,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			got := Safe(tt.args.v)
+			require.Equal(t, tt.want, got, "Safe() = %v, want %v", got, tt.want)
+		})
+	}
+}