Handle struct field name variations

internal/ast/ast.go

@@ -9,7 +9,8 @@ type Kind int
 
 const (
 	// meta
-	Comment Kind = iota
+	Invalid Kind = iota
+	Comment
 	Key
 
 	// top level structures
@@ -34,6 +35,8 @@ const (
 
 func (k Kind) String() string {
 	switch k {
+	case Invalid:
+		return "Invalid"
 	case Comment:
 		return "Comment"
 	case Key:

targets.go

@@ -3,6 +3,7 @@ package toml
 import (
 	"fmt"
 	"reflect"
+	"strings"
 )
 
 type target interface {
@@ -358,8 +359,11 @@ func scopeStruct(v reflect.Value, name string) (target, bool, error) {
 		if f.Anonymous {
 			// TODO: handle embedded structs
 		} else {
-			// TODO: handle names variations
-			if f.Name == name {
+			fieldName, ok := f.Tag.Lookup("toml")
+			if !ok {
+				fieldName = f.Name
+			}
+			if strings.EqualFold(fieldName, name) {
 				return valueTarget(v.Field(i)), true, nil
 			}
 		}