feat: added error codes

.github/workflows/build.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        go-version: ["1.20"]
+        go-version: ["1.21"]
 
     steps:
       - uses: actions/setup-go@v5
@@ -29,9 +29,9 @@ jobs:
     strategy:
       matrix:
         go-version: 
-          - "1.20"
           - "1.21"
           - "1.22"
+          - "1.23"
 
     steps:
       - uses: actions/setup-go@v5

bench_test.go

@@ -10,7 +10,7 @@ var (
 		Lat: 37,
 		Lng: -122,
 	}
-	cell     = LatLngToCell(geo, 15)
+	cell, _  = LatLngToCell(geo, 15)
 	addr     = cell.String()
 	geoBndry CellBoundary
 	cells    []Cell
@@ -31,30 +31,30 @@ func BenchmarkFromString(b *testing.B) {
 
 func BenchmarkToGeoRes15(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		geo = CellToLatLng(cell)
+		geo, _ = CellToLatLng(cell)
 	}
 }
 
 func BenchmarkFromGeoRes15(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		cell = LatLngToCell(geo, 15)
+		cell, _ = LatLngToCell(geo, 15)
 	}
 }
 
 func BenchmarkToGeoBndryRes15(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		geoBndry = CellToBoundary(cell)
+		geoBndry, _ = CellToBoundary(cell)
 	}
 }
 
 func BenchmarkHexRange(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		cells = cell.GridDisk(10)
+		cells, _ = cell.GridDisk(10)
 	}
 }
 
 func BenchmarkPolyfill(b *testing.B) {
 	for n := 0; n < b.N; n++ {
-		cells = PolygonToCells(validGeoPolygonHoles, 15)
+		cells, _ = PolygonToCells(validGeoPolygonHoles, 15)
 	}
 }

example_test.go

@@ -9,8 +9,11 @@
 func ExampleLatLngToCell() {
 	latLng := h3.NewLatLng(37.775938728915946, -122.41795063018799)
 	resolution := 9
-	c := h3.LatLngToCell(latLng, resolution)
+	c, err := h3.LatLngToCell(latLng, resolution)
+	if err != nil {
+		panic(err)
+	}
 	fmt.Printf("%s", c)
 	// Output:
 	// 8928308280fffff
 }

go.mod

@@ -1,3 +1,3 @@
 module github.com/uber/h3-go/v4
 
-go 1.20
+go 1.21