np: parse: Create proc AST, handle end/begin, ...

This commit introduces AST object types and AST integer type
definitions. We also now keep track of how deep we are in begin/end
tags.

- Introduce parsing for TT_BEGIN
- Introduce parsing for TT_END

Signed-off-by: Ian Moffett <ian@osmora.org>

2 files changed, 16 insertions, 2 deletions

diff --git a/src/sys/include/np/ast.h b/src/sys/include/np/ast.h
index 8e516d7..9232226 100644
--- a/src/sys/include/np/ast.h
+++ b/src/sys/include/np/ast.h
@@ -52,16 +52,26 @@ typedef enum {
 } ast_itype_t;
 
 /*
+ * AST node type
+ */
+typedef enum {
+    AT_BAD_OBJTYPE, /* Bad */
+    AST_PROC,       /* Procedure */
+} ast_type_t;
+
+/*
  * Represents an AST node
  *
  * @ident: Identifier
- * @token: Token type
+ * @num_type: Integer type
+ * @type: Object type
  * @left: Left node
  * @right: Right node
  */
 struct ast_node {
     char *ident;
-    tt_t token;
+    ast_itype_t num_type;
+    ast_type_t type;
     struct ast_node *left;
     struct ast_node *right;
 };
diff --git a/src/sys/include/os/np.h b/src/sys/include/os/np.h
index c3921cb..9b04f0e 100644
--- a/src/sys/include/os/np.h
+++ b/src/sys/include/os/np.h
@@ -49,6 +49,8 @@
  * @lex_st: Lexer state
  * @ast_root: Parse tree
  * @ccache: Character cache (temporary store for lexer)
+ * @in_func: Is set if we are inside a function
+ * @begin_depth: How deep in "begin" we are
  */
 struct np_work {
     char *source;
@@ -58,6 +60,8 @@ struct np_work {
     struct ptrbox *work_mem;
     struct ast_node *ast_root;
     char ccache;
+    uint8_t in_func : 1;
+    uint8_t begin_depth;
 };
 
 /*