diff --git a/chore/llcppg/ast/ast.go b/chore/llcppg/ast/ast.go
index 33a43181..27566722 100644
--- a/chore/llcppg/ast/ast.go
+++ b/chore/llcppg/ast/ast.go
@@ -16,6 +16,10 @@
 
 package ast
 
+import (
+	"github.com/goplus/llgo/chore/llcppg/token"
+)
+
 // =============================================================================
 
 type Node interface {
@@ -44,6 +48,11 @@ type PPD interface { // preprocessing directive
 // =============================================================================
 // Expressions (Types are also expressions)
 
+type Token struct {
+	Token token.Token
+	Lit   string
+}
+
 type BasicLitKind uint
 
 const (
@@ -293,6 +302,8 @@ func (*Include) ppdNode() {}
 // ------------------------------------------------
 
 type Macro struct {
+	Name string
+	Info []*Token
 }
 
 func (*Macro) ppdNode() {}
diff --git a/chore/llcppg/token/token.go b/chore/llcppg/token/token.go
new file mode 100644
index 00000000..398919cc
--- /dev/null
+++ b/chore/llcppg/token/token.go
@@ -0,0 +1,27 @@
+package token
+
+type Token uint
+
+const (
+	/**
+	 * A token that contains some kind of punctuation.
+	 */
+	PunctuationToken Token = iota
+	/**
+	 * A language keyword.
+	 */
+	KeywordToken
+
+	/**
+	 * An identifier (that is not a keyword).
+	 */
+	IdentifierToken
+	/**
+	 * A numeric, string, or character literal.
+	 */
+	LiteralToken
+	/**
+	 * A comment.
+	 */
+	CommentToken
+)