added

vendor/github.com/shurcooL/go/printerutil/printerutil.go

@@ -0,0 +1,36 @@
+// Package printerutil provides formatted printing of AST nodes.
+package printerutil
+
+import (
+	"bytes"
+	"fmt"
+	"go/printer"
+	"go/token"
+)
+
+// Consistent with the default gofmt behavior.
+var config = printer.Config{Mode: printer.UseSpaces | printer.TabIndent, Tabwidth: 8}
+
+// SprintAst prints node, using fset, and returns it as string.
+func SprintAst(fset *token.FileSet, node interface{}) string {
+	var buf bytes.Buffer
+	config.Fprint(&buf, fset, node)
+	return buf.String()
+}
+
+// SprintAstBare prints node and returns it as string.
+func SprintAstBare(node interface{}) string {
+	fset := token.NewFileSet()
+	return SprintAst(fset, node)
+}
+
+// PrintlnAst prints node, using fset, to stdout.
+func PrintlnAst(fset *token.FileSet, node interface{}) {
+	fmt.Println(SprintAst(fset, node))
+}
+
+// PrintlnAstBare prints node to stdout.
+func PrintlnAstBare(node interface{}) {
+	fset := token.NewFileSet()
+	PrintlnAst(fset, node)
+}