Making type of registered events configurable

api.go

@@ -19,6 +19,7 @@ type Config struct {
 	ParseNumbers       bool
 	NumberMin          int
 	NumberMax          int
+	ExcludeTypes       map[Type]bool
 }
 
 func Run(files []*ast.File, fset *token.FileSet, cfg *Config) ([]Issue, error) {
@@ -32,6 +33,7 @@ func Run(files []*ast.File, fset *token.FileSet, cfg *Config) ([]Issue, error) {
 		cfg.NumberMax,
 		cfg.MinStringLength,
 		cfg.MinOccurrences,
+		cfg.ExcludeTypes,
 	)
 	var issues []Issue
 	for _, f := range files {

cmd/goconst/main.go

@@ -94,6 +94,7 @@ func run(path string) (bool, error) {
 		*flagMax,
 		*flagMinLength,
 		*flagMinOccurrences,
+		map[goconst.Type]bool{},
 	)
 	strs, consts, err := gco.ParseTree()
 	if err != nil {

parser.go

@@ -28,6 +28,7 @@ type Parser struct {
 	ignoreTests, matchConstant bool
 	minLength, minOccurrences  int
 	numberMin, numberMax       int
+	excludeTypes               map[Type]bool
 
 	supportedTokens []token.Token
 
@@ -38,7 +39,7 @@ type Parser struct {
 
 // New creates a new instance of the parser.
 // This is your entry point if you'd like to use goconst as an API.
-func New(path, ignore string, ignoreTests, matchConstant, numbers bool, numberMin, numberMax, minLength, minOccurrences int) *Parser {
+func New(path, ignore string, ignoreTests, matchConstant, numbers bool, numberMin, numberMax, minLength, minOccurrences int, excludeTypes map[Type]bool) *Parser {
 	supportedTokens := []token.Token{token.STRING}
 	if numbers {
 		supportedTokens = append(supportedTokens, token.INT, token.FLOAT)
@@ -54,6 +55,7 @@ func New(path, ignore string, ignoreTests, matchConstant, numbers bool, numberMi
 		numberMin:       numberMin,
 		numberMax:       numberMax,
 		supportedTokens: supportedTokens,
+		excludeTypes:    excludeTypes,
 
 		// Initialize the maps
 		strs:   Strings{},
@@ -162,3 +164,13 @@ type ExtendedPos struct {
 	token.Position
 	packageName string
 }
+
+type Type int
+
+const (
+	Assignment Type = iota
+	Binary
+	Case
+	Return
+	Call
+)

visitor.go

@@ -57,7 +57,7 @@ func (v *treeVisitor) Visit(node ast.Node) ast.Visitor {
 				continue
 			}
 
-			v.addString(lit.Value, rhs.(*ast.BasicLit).Pos())
+			v.addString(lit.Value, rhs.(*ast.BasicLit).Pos(), Assignment)
 		}
 
 	// if foo == "moo"
@@ -71,20 +71,20 @@ func (v *treeVisitor) Visit(node ast.Node) ast.Visitor {
 
 		lit, ok = t.X.(*ast.BasicLit)
 		if ok && v.isSupported(lit.Kind) {
-			v.addString(lit.Value, lit.Pos())
+			v.addString(lit.Value, lit.Pos(), Binary)
 		}
 
 		lit, ok = t.Y.(*ast.BasicLit)
 		if ok && v.isSupported(lit.Kind) {
-			v.addString(lit.Value, lit.Pos())
+			v.addString(lit.Value, lit.Pos(), Binary)
 		}
 
 	// case "foo":
 	case *ast.CaseClause:
 		for _, item := range t.List {
 			lit, ok := item.(*ast.BasicLit)
 			if ok && v.isSupported(lit.Kind) {
-				v.addString(lit.Value, lit.Pos())
+				v.addString(lit.Value, lit.Pos(), Case)
 			}
 		}
 
@@ -93,7 +93,7 @@ func (v *treeVisitor) Visit(node ast.Node) ast.Visitor {
 		for _, item := range t.Results {
 			lit, ok := item.(*ast.BasicLit)
 			if ok && v.isSupported(lit.Kind) {
-				v.addString(lit.Value, lit.Pos())
+				v.addString(lit.Value, lit.Pos(), Return)
 			}
 		}
 
@@ -102,7 +102,7 @@ func (v *treeVisitor) Visit(node ast.Node) ast.Visitor {
 		for _, item := range t.Args {
 			lit, ok := item.(*ast.BasicLit)
 			if ok && v.isSupported(lit.Kind) {
-				v.addString(lit.Value, lit.Pos())
+				v.addString(lit.Value, lit.Pos(), Call)
 			}
 		}
 	}
@@ -111,7 +111,11 @@ func (v *treeVisitor) Visit(node ast.Node) ast.Visitor {
 }
 
 // addString adds a string in the map along with its position in the tree.
-func (v *treeVisitor) addString(str string, pos token.Pos) {
+func (v *treeVisitor) addString(str string, pos token.Pos, typ Type) {
+	ok, excluded := v.p.excludeTypes[typ]
+	if ok && excluded {
+		return
+	}
 	// Drop quotes if any
 	if strings.HasPrefix(str, `"`) || strings.HasPrefix(str, "`") {
 		str, _ = strconv.Unquote(str)
@@ -126,7 +130,7 @@ func (v *treeVisitor) addString(str string, pos token.Pos) {
 		return
 	}
 
-	_, ok := v.p.strs[str]
+	_, ok = v.p.strs[str]
 	if !ok {
 		v.p.strs[str] = make([]ExtendedPos, 0)
 	}