1 files changed, 15 insertions, 0 deletions
diff --git a/internal/intconv/i64_i32.go b/internal/intconv/i64_i32.go
new file mode 100644
index 00000000..485e7895
--- /dev/null
+++ b/internal/intconv/i64_i32.go
@@ -0,0 +1,15 @@
+package intconv
+
+import (
+	"fmt"
+	"math"
+)
+
+// Int64ToInt32 converts v to int32, returning an error if it overflows.
+func Int64ToInt32(v int64) (int32, error) {
+	if v < math.MinInt32 || v > math.MaxInt32 {
+		return 0, fmt.Errorf("intconv: int64 %d overflows int32", v)
+	}
+
+	return int32(v), nil
+}