added

vendor/github.com/shurcooL/go/parserutil/parserutil.go

@@ -0,0 +1,34 @@
+// Package parserutil offers convenience functions for parsing Go code to AST.
+package parserutil
+
+import (
+	"errors"
+	"go/ast"
+	"go/parser"
+	"go/token"
+)
+
+// ParseStmt is a convenience function for obtaining the AST of a statement x.
+// The position information recorded in the AST is undefined. The filename used
+// in error messages is the empty string.
+func ParseStmt(x string) (ast.Stmt, error) {
+	file, err := parser.ParseFile(token.NewFileSet(), "", "package p;func _(){\n//line :1\n"+x+"\n;}", 0)
+	if err != nil {
+		return nil, err
+	}
+	return file.Decls[0].(*ast.FuncDecl).Body.List[0], nil
+}
+
+// ParseDecl is a convenience function for obtaining the AST of a declaration x.
+// The position information recorded in the AST is undefined. The filename used
+// in error messages is the empty string.
+func ParseDecl(x string) (ast.Decl, error) {
+	file, err := parser.ParseFile(token.NewFileSet(), "", "package p\n//line :1\n"+x+"\n", 0)
+	if err != nil {
+		return nil, err
+	}
+	if len(file.Decls) == 0 {
+		return nil, errors.New("no declaration")
+	}
+	return file.Decls[0], nil
+}