Add a parser struct.

include/libabacus.h

@@ -4,6 +4,7 @@
 #include "ht.h"
 #include "lexer.h"
 #include "table.h"
+#include "parser.h"
 #include "libabacus_result.h"
 
 /**
@@ -52,6 +53,11 @@ struct libab_s {
      * to tokens.
      */
     libab_lexer lexer;
+    /**
+     * The parser used to convert
+     * tokens to a tree.
+     */
+    libab_parser parser;
     /**
      * The table used to store top-level
      * things like functions and operators.

include/parser.h

@@ -5,12 +5,36 @@
 #include "ll.h"
 #include "tree.h"
 
+/**
+ * The parser that is used by libabacus
+ * to store information for converting
+ * tokens into trees.
+ */
+struct libab_parser_s {
+    libab_table* base_table;
+};
+
+typedef struct libab_parser_s libab_parser;
+
+/**
+ * Initializes the parser.
+ * @param parser the parser to intialize.
+ * @param table the table of "reserved" entries like operators.
+ */
+void libab_parser_init(libab_parser* parser, libab_table* table);
 /**
  * Parses the given list of tokens into the given tree pointer.
+ * @param parser the parser to use for parsing text.
  * @param tokens the tokens to use for parsing.
  * @param string the string to use for determining token values.
  * @param store_into tree pointer to store the new data into.
  */
-libab_result libab_parse_tokens(ll* tokens, const char* string, libab_tree** store_into);
+libab_result libab_parser_parse(libab_parser* parser, ll* tokens,
+        const char* string, libab_tree** store_into);
+/**
+ * Releases the resources allocated by the parser.
+ * @param parser the parser to release.
+ */
+void libab_parser_free(libab_parser* parser);
 
 #endif

include/tree.h

@@ -1,7 +1,7 @@
 #ifndef LIBABACUS_TREE_H
 #define LIBABACUS_TREE_H
 
-#include "libabacus.h"
+#include "libabacus_result.h"
 #include "vec.h"
 
 /**