fix: nil pointer

goast.go

@@ -10,6 +10,7 @@ import (
 
 type Parser struct {
 	source *os.File
+	debug  bool
 }
 
 type Defines struct {
@@ -39,7 +40,9 @@ func (ps *Parser) Parse() (*Defines, error) {
 		return nil, err
 	}
 
-	//ast.Print(tokenSet, astFile)
+	if ps.debug {
+		_ = ast.Print(tokenSet, astFile)
+	}
 
 	var defines = &Defines{
 		variable: make(map[string]struct{}),
@@ -86,6 +89,10 @@ func (ps *Parser) Parse() (*Defines, error) {
 	return defines, nil
 }
 
+func (ps *Parser) Debug() {
+	ps.debug = true
+}
+
 func (d *Defines) ExistVariable(name string) bool {
 	_, exist := d.variable[name]
 	return exist

goast_test.go

@@ -2,14 +2,15 @@ package goast_test
 
 import (
 	"fmt"
+	"gitter.top/coco/goast"
 	"testing"
 
 	"github.com/stretchr/testify/assert"
-	"gitter.top/coco/goast"
 )
 
 func TestParser_Parse(t *testing.T) {
 	parser, err := goast.NewParser("./testdata/main.go")
+	parser.Debug()
 	assert.NoError(t, err)
 	defines, err := parser.Parse()
 	assert.NoError(t, err)

testdata/main.go

@@ -1,19 +1,7 @@
 package goast
 
-import (
-	_ "github.com/stretchr/testify"
-)
-
-var a = 1
-
-const d = "world"
-
-func hello() {
-
-}
-
-type c int
-
-func (cc c) name() {
+import "os"
 
+type ExampleService struct {
+	os.File
 }

util.go

@@ -4,7 +4,10 @@ import "go/ast"
 
 // getKVFromImportSpec get import name and package path from *ast.ImportSpec
 func getKVFromImportSpec(impt *ast.ImportSpec) (string, string) {
-	name := impt.Name.Name
+	var name string
+	if impt.Name != nil {
+		name = impt.Name.Name
+	}
 	pkg := impt.Path.Value
 	return name, pkg
 }
@@ -19,7 +22,13 @@ func getKVFromValueSpec(spec *ast.ValueSpec) (string, string) {
 // getKVFromTypeSpec get type name and base type from *ast.TypeSpec
 func getKVFromTypeSpec(spec *ast.TypeSpec) (string, string) {
 	name := spec.Name.Name
-	value := spec.Type.(*ast.Ident).Name
+	var value string
+	switch spec.Type.(type) {
+	case *ast.Ident:
+		value = spec.Type.(*ast.Ident).Name
+	case *ast.StructType:
+		value = "raw"
+	}
 	return name, value
 }