Parse very basic declarations

1 files changed, 26 insertions, 4 deletions

diff --git a/src/parser.h b/src/parser.h
index 8da762d..ba5aa58 100644
--- a/src/parser.h
+++ b/src/parser.h
@@ -1,19 +1,38 @@
 #ifndef ORYX_PARSER_H
 #define ORYX_PARSER_H
 
+#include <stdbool.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include "lexer.h"
 
 enum {
-	PRSBINADD = '+',
-	PRSBINSUB = '-',
+	PRSDECL,         /* Declaration */
+	PRSNUMERIC,      /* Numeric constant */
+	PRSTYPE,         /* Type */
+
+	PRSBINADD = '+', /* Addition */
 };
 
 typedef uint8_t ast_kind;
 
-#define AST_SOA_BLKSZ (sizeof(ast_kind) + sizeof(size_t) * 3)
+#define AST_SOA_BLKSZ (sizeof(ast_kind) + sizeof(size_t) * 4)
+
+/*
+ * AST Notes:
+ *
+ * Declarations have .lhs set to the type of the symbol being declared and .rhs
+ * set to the value of the declaration if it is an assignment declaration.  They
+ * also have aux.constdecl set to true if it’s a declaration of a constant.
+ */
+
+struct auxilliary {
+	union extra {
+		bool constdecl;
+	} *buf;
+	size_t len, cap;
+};
 
 struct ast_soa {
 	ast_kind *kinds;
@@ -21,10 +40,13 @@ struct ast_soa {
 	struct {
 		size_t lhs, rhs;
 	} *kids;
+	size_t *extra;
 	size_t len, cap;
+
+	struct auxilliary aux;
 };
 
-#define ast_free(x) free((x).kinds)
+#define ast_free(x) do { free((x).kinds); free((x).aux.buf); } while (0)
 
 /* Parse the tokens in TOKS into an abstract syntax tree */
 struct ast_soa parsetoks(struct lexemes_soa toks);