1 files changed, 60 insertions, 0 deletions

diff --git a/source/fajr_parser/fajr_parser.h b/source/fajr_parser/fajr_parser.h
new file mode 100644
index 0000000..d83dde2
--- /dev/null
+++ b/source/fajr_parser/fajr_parser.h
@@ -0,0 +1,60 @@
+#ifndef EDITOR_PARSER_H
+#define EDITOR_PARSER_H
+
+typedef enum syntax_node_type syntax_node_type;
+enum syntax_node_type
+{
+    SyntaxNodeLiteral,
+    SyntaxNodeIdentifier,
+    SyntaxNodeBinary,
+
+    SyntaxNodeAssignment,
+    SyntaxNodeReturn,
+    SyntaxNodeFunction,
+    SyntaxNodeUnwanted,
+};
+
+typedef struct syntax_node syntax_node;
+struct syntax_node
+{
+    syntax_node *First;
+    syntax_node *Last;
+    syntax_node *Parent;
+    syntax_node *Next;
+
+    token *Token;
+
+    syntax_node_type Type;
+};
+
+typedef struct concrete_syntax_tree concrete_syntax_tree;
+struct concrete_syntax_tree
+{
+    syntax_node *Root;
+    syntax_node *Current;
+};
+
+// TODO(nasr): implement this later together with file handling
+read_only global_variable
+syntax_node nil_syntax_node =
+{
+.First  = &nil_syntax_node,
+.Last   = &nil_syntax_node,
+.Parent = &nil_syntax_node,
+.Next   = &nil_syntax_node,
+.Token  = &nil_token,
+};
+
+read_only global_variable
+concrete_syntax_tree nil_concrete_syntax_tree =
+{
+.Root    = &nil_syntax_node,
+.Current = &nil_syntax_node,
+};
+
+#define PeekForward(Node, Type, NilNode) \
+    for(; (Node) && (Node) != &(NilNode); (Node) = (Node)->Next) \
+        if((Node)->Token->Type == (Type)) \
+            break;
+
+#endif // EDITOR_PARSER_H