From c7a3c7b7d606b00fa1c676e244c39002b8fc1609 Mon Sep 17 00:00:00 2001
From: Ganesh Viswanathan <dev@genotrance.com>
Date: Thu, 27 Dec 2018 00:38:29 -0600
Subject: Fix typedef struct bug

---
 nimterop/grammar.nim | 42 +++++++++++++++++++++++++-----------------
 toast.nim            | 13 ++++++++++---
 2 files changed, 35 insertions(+), 20 deletions(-)

diff --git a/nimterop/grammar.nim b/nimterop/grammar.nim
index aa364b1..bb789bc 100644
--- a/nimterop/grammar.nim
+++ b/nimterop/grammar.nim
@@ -100,27 +100,32 @@ proc initGrammar() =
           gStateRT.typeStr &= &"    {fname}*: {ftyp}\n"
           i += 2
 
-  let fieldGrammar = """
-    (field_identifier?)
-    (array_declarator?
-     (field_identifier)
-     (identifier|number_literal)
-    )
-  """
+  let
+    fieldGrammar = """
+      (field_identifier?)
+      (array_declarator?
+       (field_identifier)
+       (identifier|number_literal)
+      )
+    """
+
+    fieldListGrammar = &"""
+      (field_declaration_list
+       (field_declaration+
+        {typeGrammar}
+        {fieldGrammar}
+        (pointer_declarator?
+         {fieldGrammar}
+        )
+       )
+      )
+    """
 
   # struct X {}
   gStateRT.grammar.add((&"""
    (struct_specifier|union_specifier
     (type_identifier)
-    (field_declaration_list
-     (field_declaration+
-      {typeGrammar}
-      {fieldGrammar}
-      (pointer_declarator?
-        {fieldGrammar}
-      )
-     )
-    )
+    {fieldListGrammar}
    )
   """,
     proc (ast: ref Ast, node: TSNode) =
@@ -130,7 +135,10 @@ proc initGrammar() =
   # typedef struct X {}
   gStateRT.grammar.add((&"""
    (type_definition
-    {gStateRT.grammar[^1].grammar}
+    (struct_specifier|union_specifier
+     (type_identifier?)
+     {fieldListGrammar}
+    )
     (type_identifier)
    )
   """,
diff --git a/toast.nim b/toast.nim
index ced3047..f9edd89 100644
--- a/toast.nim
+++ b/toast.nim
@@ -4,7 +4,7 @@ import treesitter/runtime
 import treesitter_c/c
 import treesitter_cpp/cpp
 
-import nimterop/[ast, globals, getters]
+import nimterop/[ast, globals, getters, grammar]
 
 proc printLisp(root: TSNode) =
   var
@@ -112,6 +112,7 @@ proc main(
     pnim = false,
     pretty = true,
     preprocess = false,
+    pgrammar = false,
     defines: seq[string] = @[],
     includeDirs: seq[string] = @[],
     source: seq[string],
@@ -126,7 +127,11 @@ proc main(
     defines: defines,
     includeDirs: includeDirs,
   )
-  if source.len != 0:
+
+  if pgrammar:
+    parseGrammar()
+    printGrammar()
+  elif source.len != 0:
     process(source[0])
 
 when isMainModule:
@@ -138,11 +143,13 @@ when isMainModule:
     "defines": "definitions to pass to preprocessor",
     "includeDirs": "include directory to pass to preprocessor",
     "preprocess": "run preprocessor on header",
+    "pgrammar": "print grammar",
     "source" : "C/C++ source/header",
   }, short = {
     "past": 'a',
     "pnim": 'n',
     "defines": 'D',
     "includeDirs": 'I',
-    "preprocess": 'p'
+    "preprocess": 'p',
+    "pgrammar": 'g'
   })
-- 
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