diff --git a/codegen/src/gen.rs b/codegen/src/gen.rs
index c954961..1186ff9 100644
--- a/codegen/src/gen.rs
+++ b/codegen/src/gen.rs
@@ -116,7 +116,7 @@
     fn box_visit(
         elem: &types::Type,
         features: &types::Features,
-        types: &[types::TypeDef],
+        types: &[types::Node],
         kind: Kind,
         name: &Operand,
     ) -> Option<TokenStream> {
@@ -133,7 +133,7 @@
     fn vec_visit(
         elem: &types::Type,
         features: &types::Features,
-        types: &[types::TypeDef],
+        types: &[types::Node],
         kind: Kind,
         name: &Operand,
     ) -> Option<TokenStream> {
@@ -171,7 +171,7 @@
     fn punctuated_visit(
         elem: &types::Type,
         features: &types::Features,
-        types: &[types::TypeDef],
+        types: &[types::Node],
         kind: Kind,
         name: &Operand,
     ) -> Option<TokenStream> {
@@ -211,7 +211,7 @@
     fn option_visit(
         elem: &types::Type,
         features: &types::Features,
-        types: &[types::TypeDef],
+        types: &[types::Node],
         kind: Kind,
         name: &Operand,
     ) -> Option<TokenStream> {
@@ -241,7 +241,7 @@
     fn tuple_visit(
         elems: &[types::Type],
         features: &types::Features,
-        types: &[types::TypeDef],
+        types: &[types::Node],
         kind: Kind,
         name: &Operand,
     ) -> Option<TokenStream> {
@@ -333,7 +333,7 @@
     fn visit(
         ty: &types::Type,
         features: &types::Features,
-        types: &[types::TypeDef],
+        types: &[types::Node],
         kind: Kind,
         name: &Operand,
     ) -> Option<TokenStream> {
@@ -391,7 +391,7 @@
         }
     }
 
-    pub fn generate(state: &mut State, s: &types::TypeDef, types: &[types::TypeDef]) {
+    pub fn generate(state: &mut State, s: &types::Node, types: &[types::Node]) {
         let features = visit_features(s.features());
         let under_name = under_name(s.ident());
         let ty = Ident::new(s.ident(), Span::call_site());
@@ -404,7 +404,7 @@
         let mut fold_impl = TokenStream::new();
 
         match s {
-            types::TypeDef::Enum(ref e) => {
+            types::Node::Enum(ref e) => {
                 let mut visit_variants = TokenStream::new();
                 let mut visit_mut_variants = TokenStream::new();
                 let mut fold_variants = TokenStream::new();
@@ -508,7 +508,7 @@
                     }
                 });
             }
-            types::TypeDef::Struct(ref v) => {
+            types::Node::Struct(ref v) => {
                 let mut fold_fields = TokenStream::new();
 
                 for field in v.fields() {
@@ -555,7 +555,7 @@
         }
 
         let mut include_fold_impl = true;
-        if let types::TypeDef::Struct(ref data) = s {
+        if let types::Node::Struct(ref data) = s {
             if !data.all_fields_pub() {
                 include_fold_impl = false;
             }
@@ -631,10 +631,10 @@
         .unwrap();
 }
 
-pub fn generate(types: &[types::TypeDef]) {
+pub fn generate(defs: &types::Definitions) {
     let mut state = codegen::State::default();
-    for s in types {
-        codegen::generate(&mut state, s, types);
+    for s in &defs.types {
+        codegen::generate(&mut state, s, &defs.types);
     }
 
     let full_macro = quote! {
diff --git a/codegen/src/json.rs b/codegen/src/json.rs
index e1b641d..3bcf7b2 100644
--- a/codegen/src/json.rs
+++ b/codegen/src/json.rs
@@ -1,10 +1,11 @@
 use crate::types;
 
+use std::collections::BTreeMap;
 use std::fs::File;
 use std::io::prelude::*;
 use std::path::Path;
 
-pub fn generate(types: &[types::TypeDef]) {
+pub fn generate(defs: &types::Definitions) {
     let codegen_root = Path::new(env!("CARGO_MANIFEST_DIR"));
 
     let mut f = File::open(codegen_root.join("../Cargo.toml")).unwrap();
@@ -17,7 +18,8 @@
 
     serde_json::to_writer_pretty(f, &Introspect {
         version: &manifest.package.version,
-        types,
+        types: &defs.types,
+        tokens: &defs.tokens,
     }).unwrap();
 }
 
@@ -35,5 +37,6 @@
 struct Introspect<'a> {
     /// The `syn` version used to generate the introspection file
     version: &'a str,
-    types: &'a [types::TypeDef],
+    types: &'a [types::Node],
+    tokens: &'a BTreeMap<String, String>,
 }
diff --git a/codegen/src/parse.rs b/codegen/src/parse.rs
index 25b8ac1..cd43d60 100644
--- a/codegen/src/parse.rs
+++ b/codegen/src/parse.rs
@@ -19,7 +19,7 @@
 type TokenLookup = BTreeMap<String, String>;
 
 /// Parse the contents of `src` and return a list of AST types.
-pub fn parse() -> Vec<types::TypeDef> {
+pub fn parse() -> types::Definitions {
     let mut item_lookup = BTreeMap::new();
     load_file(SYN_CRATE_ROOT, &[], &mut item_lookup).unwrap();
 
@@ -49,10 +49,14 @@
         );
     }
 
-    item_lookup
+    let types = item_lookup
         .values()
         .map(|item| introspect_item(item, &item_lookup, &token_lookup))
-        .collect()
+        .collect();
+
+    let tokens = token_lookup.into_iter().map(|(name, ty)| (ty, name)).collect();
+
+    types::Definitions { types, tokens }
 }
 
 /// Data extracted from syn source
@@ -62,18 +66,18 @@
     features: Vec<syn::Attribute>,
 }
 
-fn introspect_item(item: &AstItem, items: &ItemLookup, tokens: &TokenLookup) -> types::TypeDef {
+fn introspect_item(item: &AstItem, items: &ItemLookup, tokens: &TokenLookup) -> types::Node {
     let features = introspect_features(&item.features);
 
     match &item.ast.data {
-        Data::Enum(ref data) => types::TypeDef::Enum(introspect_enum(
+        Data::Enum(ref data) => types::Node::Enum(introspect_enum(
             &item.ast.ident,
             features,
             data,
             items,
             tokens,
         )),
-        Data::Struct(ref data) => types::TypeDef::Struct(introspect_struct(
+        Data::Struct(ref data) => types::Node::Struct(introspect_struct(
             &item.ast.ident,
             features,
             data,
diff --git a/codegen/src/types.rs b/codegen/src/types.rs
index 679b72e..1eea214 100644
--- a/codegen/src/types.rs
+++ b/codegen/src/types.rs
@@ -1,8 +1,14 @@
+use std::collections::BTreeMap;
 use std::ops;
 
+pub struct Definitions {
+    pub types: Vec<Node>,
+    pub tokens: BTreeMap<String, String>,
+}
+
 #[derive(Debug, Serialize)]
 #[serde(tag = "node", rename_all = "lowercase")]
-pub enum TypeDef {
+pub enum Node {
     Struct(Struct),
     Enum(Enum),
 }
@@ -80,18 +86,18 @@
     any: Vec<String>,
 }
 
-impl TypeDef {
+impl Node {
     pub fn ident(&self) -> &str {
         match self {
-            TypeDef::Struct(i) => &i.ident,
-            TypeDef::Enum(i) => &i.ident,
+            Node::Struct(i) => &i.ident,
+            Node::Enum(i) => &i.ident,
         }
     }
 
     pub fn features(&self) -> &Features {
         match self {
-            TypeDef::Struct(i) => &i.features,
-            TypeDef::Enum(i) => &i.features,
+            Node::Struct(i) => &i.features,
+            Node::Enum(i) => &i.features,
         }
     }
 }
diff --git a/syn.json b/syn.json
index 597cc1f..80dcb73 100644
--- a/syn.json
+++ b/syn.json
@@ -9490,5 +9490,105 @@
         }
       ]
     }
-  ]
+  ],
+  "tokens": {
+    "Abstract": "abstract",
+    "Add": "+",
+    "AddEq": "+=",
+    "And": "&",
+    "AndAnd": "&&",
+    "AndEq": "&=",
+    "As": "as",
+    "Async": "async",
+    "At": "@",
+    "Auto": "auto",
+    "Bang": "!",
+    "Become": "become",
+    "Box": "box",
+    "Break": "break",
+    "Caret": "^",
+    "CaretEq": "^=",
+    "Colon": ":",
+    "Colon2": "::",
+    "Comma": ",",
+    "Const": "const",
+    "Continue": "continue",
+    "Crate": "crate",
+    "Default": "default",
+    "Div": "/",
+    "DivEq": "/=",
+    "Do": "do",
+    "Dot": ".",
+    "Dot2": "..",
+    "Dot3": "...",
+    "DotDotEq": "..=",
+    "Dyn": "dyn",
+    "Else": "else",
+    "Enum": "enum",
+    "Eq": "=",
+    "EqEq": "==",
+    "Existential": "existential",
+    "Extern": "extern",
+    "FatArrow": "=>",
+    "Final": "final",
+    "Fn": "fn",
+    "For": "for",
+    "Ge": ">=",
+    "Gt": ">",
+    "If": "if",
+    "Impl": "impl",
+    "In": "in",
+    "LArrow": "<-",
+    "Le": "<=",
+    "Let": "let",
+    "Loop": "loop",
+    "Lt": "<",
+    "Macro": "macro",
+    "Match": "match",
+    "Mod": "mod",
+    "Move": "move",
+    "MulEq": "*=",
+    "Mut": "mut",
+    "Ne": "!=",
+    "Or": "|",
+    "OrEq": "|=",
+    "OrOr": "||",
+    "Override": "override",
+    "Pound": "#",
+    "Priv": "priv",
+    "Pub": "pub",
+    "Question": "?",
+    "RArrow": "->",
+    "Ref": "ref",
+    "Rem": "%",
+    "RemEq": "%=",
+    "Return": "return",
+    "SelfType": "Self",
+    "SelfValue": "self",
+    "Semi": ";",
+    "Shl": "<<",
+    "ShlEq": "<<=",
+    "Shr": ">>",
+    "ShrEq": ">>=",
+    "Star": "*",
+    "Static": "static",
+    "Struct": "struct",
+    "Sub": "-",
+    "SubEq": "-=",
+    "Super": "super",
+    "Tilde": "~",
+    "Trait": "trait",
+    "Try": "try",
+    "Type": "type",
+    "Typeof": "typeof",
+    "Underscore": "_",
+    "Union": "union",
+    "Unsafe": "unsafe",
+    "Unsized": "unsized",
+    "Use": "use",
+    "Virtual": "virtual",
+    "Where": "where",
+    "While": "while",
+    "Yield": "yield"
+  }
 }
\ No newline at end of file