1 files changed, 45 insertions, 0 deletions
diff --git a/prv.h b/prv.h
new file mode 100644
index 0000000..2f59ec4
--- /dev/null
+++ b/prv.h
@@ -0,0 +1,45 @@
+#ifndef PRV_H
+#define PRV_H
+
+#include "lex.h"
+#include <stddef.h>
+
+struct step
+{
+    enum tktype type;
+    const char *id;
+    int chain;
+};
+
+struct pos
+{
+    const struct seq *seq, *stseq;
+    const struct step *step;
+};
+
+struct prv
+{
+    const struct tk *tk, *stk;
+    struct storage *st;
+    struct tdlevel *levels;
+    struct pos *pos;
+    struct ast *ast;
+    struct type *nest;
+    size_t n, i, block;
+};
+
+struct seq
+{
+    const struct step *steps;
+    int (*fn)(const struct lex *l, struct prv *p);
+    int (*end)(const struct lex *l, struct prv *p);
+    const char *chain;
+};
+
+int kw(const char *s);
+int prev(const struct prv *p);
+int push(const struct pos *pos, struct prv *p);
+int pop(const struct lex *l, struct prv *p);
+char *sdup(const char *s);
+
+#endif