ToSnakeCase = strutil.ToSnakeCase

Author: ungerik

go.mod

@@ -4,7 +4,7 @@ go 1.21
 
 require (
 	github.com/domonda/go-errs v0.0.0-20230810132956-1b6272f9fc8f
-	github.com/domonda/go-types v0.0.0-20230810134814-bd15ee23faf5
+	github.com/domonda/go-types v0.0.0-20230829145420-30f9974e0bc7
 	github.com/go-sql-driver/mysql v1.7.1
 	github.com/lib/pq v1.10.9
 	github.com/stretchr/testify v1.8.4

go.sum

@@ -4,10 +4,8 @@ github.com/domonda/go-errs v0.0.0-20230810132956-1b6272f9fc8f h1:OQaXlKXZc52Vsz7
 github.com/domonda/go-errs v0.0.0-20230810132956-1b6272f9fc8f/go.mod h1:DYkFE3rxUGhTCMmR5MpQ2NTtoCPiORdjBATGkIEeGKM=
 github.com/domonda/go-pretty v0.0.0-20230810130018-8920f571470a h1:b3a6MwwMrHR9dw6585e3Ky51T50OKuD3fRuLyh8ziEw=
 github.com/domonda/go-pretty v0.0.0-20230810130018-8920f571470a/go.mod h1:3QkM8UJdyJMeKZiIo7hYzSkQBpRS3k0gOHw4ysyEIB4=
-github.com/domonda/go-types v0.0.0-20230810133443-7fcb0a5a218b h1:owt4+9DbUZvPYKjUfUnE+unOlVmJ35CItJTM2Sr8iwk=
-github.com/domonda/go-types v0.0.0-20230810133443-7fcb0a5a218b/go.mod h1:qMSeU/23ZUopt+1kY0pJ27iqNRtsY1jATQklyCyLRAU=
-github.com/domonda/go-types v0.0.0-20230810134814-bd15ee23faf5 h1:hILmOg7w0+ozEd/AXCiGlCt0MsnD7cp5drmrq2D3xtc=
-github.com/domonda/go-types v0.0.0-20230810134814-bd15ee23faf5/go.mod h1:qMSeU/23ZUopt+1kY0pJ27iqNRtsY1jATQklyCyLRAU=
+github.com/domonda/go-types v0.0.0-20230829145420-30f9974e0bc7 h1:riEK9SQ1O0ADGI66P1Rz2zqB+g3qlREm/wF7DINj7RI=
+github.com/domonda/go-types v0.0.0-20230829145420-30f9974e0bc7/go.mod h1:qMSeU/23ZUopt+1kY0pJ27iqNRtsY1jATQklyCyLRAU=
 github.com/go-sql-driver/mysql v1.7.1 h1:lUIinVbN1DY0xBg0eMOzmmtGoHwWBbvnWubQUrtU8EI=
 github.com/go-sql-driver/mysql v1.7.1/go.mod h1:OXbVy3sEdcQ2Doequ6Z5BW6fXNQTmx+9S1MCJN5yJMI=
 github.com/jinzhu/now v1.1.5 h1:/o9tlHleP7gOFmsnYNz3RGnqzefHA47wQpKrrdTIwXQ=
@@ -23,8 +21,6 @@ github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZb
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
 github.com/stretchr/testify v1.8.4 h1:CcVxjf3Q8PM0mHUKJCdn+eZZtm5yQwehR5yeSVQQcUk=
 github.com/stretchr/testify v1.8.4/go.mod h1:sz/lmYIOXD/1dqDmKjjqLyZ2RngseejIcXlSw2iwfAo=
-github.com/ungerik/go-reflection v0.0.0-20220113085621-6c5fc1f2694a h1:9vfYtqoyrPw08TbSLxkSXEflp6iXa3RL86Qjs+DrVas=
-github.com/ungerik/go-reflection v0.0.0-20220113085621-6c5fc1f2694a/go.mod h1:6Hnd2/4g3Tpt6TjvxHx8wXOZziwApVxRdIGkr7vNpXs=
 github.com/ungerik/go-reflection v0.0.0-20230810134712-a63435f6bc7e h1:BPksMeVdgSD8L4yXHYSY3HpdJ/5z2Ok5lF6PxHIVgEQ=
 github.com/ungerik/go-reflection v0.0.0-20230810134712-a63435f6bc7e/go.mod h1:1Q14POg/xa/P6/hWKfnUexqUhW1X6jgw+6gG7lOne1E=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=

structfieldmapping.go

@@ -4,7 +4,8 @@ import (
 	"fmt"
 	"reflect"
 	"strings"
-	"unicode"
+
+	"github.com/domonda/go-types/strutil"
 )
 
 // FieldFlag is a bitmask for special properties
@@ -59,6 +60,9 @@ func NewTaggedStructFieldMapping() *TaggedStructFieldMapping {
 // Implements StructFieldMapper.
 var DefaultStructFieldMapping = NewTaggedStructFieldMapping()
 
+// TaggedStructFieldMapping implements StructFieldMapper
+var _ StructFieldMapper = new(TaggedStructFieldMapping)
+
 // TaggedStructFieldMapping implements StructFieldMapper with a struct field NameTag
 // to be used for naming and a UntaggedNameFunc in case the NameTag is not set.
 type TaggedStructFieldMapping struct {
@@ -141,18 +145,6 @@ func IgnoreStructField(string) string { return "" }
 // ToSnakeCase converts s to snake case
 // by lower casing everything and inserting '_'
 // before every new upper case character in s.
-func ToSnakeCase(s string) string {
-	var b strings.Builder
-	b.Grow(len(s) + 2)
-	lastWasUpper := true
-	for _, r := range s {
-		lr := unicode.ToLower(r)
-		isUpper := lr != r
-		if isUpper && !lastWasUpper {
-			b.WriteByte('_')
-		}
-		b.WriteRune(lr)
-		lastWasUpper = isUpper
-	}
-	return b.String()
-}
+// Whitespace, symbol, and punctuation characters
+// will be replace by '_'.
+var ToSnakeCase = strutil.ToSnakeCase