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-rw-r--r--internal/num/signed.go12
1 files changed, 12 insertions, 0 deletions
diff --git a/internal/num/signed.go b/internal/num/signed.go
new file mode 100644
index 0000000..d0c88f0
--- /dev/null
+++ b/internal/num/signed.go
@@ -0,0 +1,12 @@
+package num
+
+import "fmt"
+
+type Signed int
+
+func (s Signed) String() string {
+ if s == 0 {
+ return ""
+ }
+ return fmt.Sprintf("%+d", int(s))
+}