[Go] Cleanup and fix ATN deserialization verification (#3574)

runtime/Go/antlr/atn_deserialization_options.go

@@ -4,22 +4,58 @@
 
 package antlr
 
-var ATNDeserializationOptionsdefaultOptions = &ATNDeserializationOptions{true, false, false}
+import "errors"
+
+var defaultATNDeserializationOptions = ATNDeserializationOptions{true, true, false}
 
 type ATNDeserializationOptions struct {
 	readOnly                      bool
 	verifyATN                     bool
 	generateRuleBypassTransitions bool
 }
 
-func NewATNDeserializationOptions(CopyFrom *ATNDeserializationOptions) *ATNDeserializationOptions {
-	o := new(ATNDeserializationOptions)
+func (opts *ATNDeserializationOptions) ReadOnly() bool {
+	return opts.readOnly
+}
+
+func (opts *ATNDeserializationOptions) SetReadOnly(readOnly bool) {
+	if opts.readOnly {
+		panic(errors.New("Cannot mutate read only ATNDeserializationOptions"))
+	}
+	opts.readOnly = readOnly
+}
+
+func (opts *ATNDeserializationOptions) VerifyATN() bool {
+	return opts.verifyATN
+}
+
+func (opts *ATNDeserializationOptions) SetVerifyATN(verifyATN bool) {
+	if opts.readOnly {
+		panic(errors.New("Cannot mutate read only ATNDeserializationOptions"))
+	}
+	opts.verifyATN = verifyATN
+}
 
-	if CopyFrom != nil {
-		o.readOnly = CopyFrom.readOnly
-		o.verifyATN = CopyFrom.verifyATN
-		o.generateRuleBypassTransitions = CopyFrom.generateRuleBypassTransitions
+func (opts *ATNDeserializationOptions) GenerateRuleBypassTransitions() bool {
+	return opts.generateRuleBypassTransitions
+}
+
+func (opts *ATNDeserializationOptions) SetGenerateRuleBypassTransitions(generateRuleBypassTransitions bool) {
+	if opts.readOnly {
+		panic(errors.New("Cannot mutate read only ATNDeserializationOptions"))
 	}
+	opts.generateRuleBypassTransitions = generateRuleBypassTransitions
+}
 
+func DefaultATNDeserializationOptions() *ATNDeserializationOptions {
+	return NewATNDeserializationOptions(&defaultATNDeserializationOptions)
+}
+
+func NewATNDeserializationOptions(other *ATNDeserializationOptions) *ATNDeserializationOptions {
+	o := new(ATNDeserializationOptions)
+	if other != nil {
+		*o = *other
+		o.readOnly = false
+	}
 	return o
 }