Add hack for skipping types as root nodes

nimterop/ast2.nim

@@ -4,9 +4,9 @@ import options as opts
 
 import compiler/[ast, idents, lineinfos, modulegraphs, msgs, options, renderer]
 
-import "."/treesitter/api
+import "."/treesitter/[api, c, cpp]
 
-import "."/[globals, getters, exprparser, comphelp]
+import "."/[globals, getters, exprparser, comphelp, tshelp]
 
 proc getPtrType*(str: string): string =
   result = case str:
@@ -99,8 +99,30 @@ proc newConstDef(gState: State, node: TSNode, fname = "", fval = ""): PNode =
         fval
       else:
         gState.getNodeVal(node[1])
-    valident =
-      gState.parseCExpression(val)
+  var valident = newNode(nkNone)
+
+  withCodeAst(val, gState.mode):
+    # This section is a hack for determining that the first
+    # node is a type, which shouldn't be accepted by a const
+    # def section. Need to replace this with some other mechanism
+    # to handle type aliases
+    var maybeTyNode: TSNode
+    # Take the very first node, which may be 2 levels
+    # down if there is an error node
+    if root.len > 0 and root[0].getName() == "ERROR":
+      maybeTyNode = root[0][0]
+    elif root.len > 0:
+      maybeTyNode = root[0]
+
+    if not maybeTyNode.isNil:
+      let name = maybeTyNode.getName()
+      case name
+      of "type_descriptor", "sized_type_specifier":
+        discard
+      else:
+        # Can't do gState.parseCExpression(root) here for some reason?
+        # get a SEGFAULT if we use root
+        valident = gState.parseCExpression(val)
 
   if name.Bl:
     # Name skipped or overridden since blank

nimterop/exprparser.nim

@@ -547,18 +547,15 @@ proc processTSNode(gState: State, node: TSNode, typeofNode: var PNode): PNode =
 
   decho "NODE RESULT: ", result
 
-proc parseCExpression*(gState: State, code: string, name = ""): PNode =
-  ## Convert the C string to a nim PNode tree
-  gState.currentExpr = code
-  gState.currentTyCastName = name
+proc parseCExpression*(gState: State, codeRoot: TSNode, name = ""): PNode =
+  ## Parse a c expression from a root ts node
 
-  result = newNode(nkNone)
-  # This is used for keeping track of the type of the first
+  # This var is used for keeping track of the type of the first
   # symbol used for type casting
   var tnode: PNode = nil
+  result = newNode(nkNone)
   try:
-    withCodeAst(gState.currentExpr, gState.mode):
-      result = gState.processTSNode(root, tnode)
+    result = gState.processTSNode(codeRoot, tnode)
   except ExprParseError as e:
     decho e.msg
     result = newNode(nkNone)
@@ -566,6 +563,14 @@ proc parseCExpression*(gState: State, code: string, name = ""): PNode =
     decho "UNEXPECTED EXCEPTION: ", e.msg
     result = newNode(nkNone)
 
+proc parseCExpression*(gState: State, code: string, name = ""): PNode =
+  ## Convert the C string to a nim PNode tree
+  gState.currentExpr = code
+  gState.currentTyCastName = name
+
+  withCodeAst(gState.currentExpr, gState.mode):
+    result = gState.parseCExpression(root, name)
+
   # Clear the state
   gState.currentExpr = ""
   gState.currentTyCastName = ""