+#ifndef PSI_CONTEXT_H
+#define PSI_CONTEXT_H
+
+#include <stdbool.h>
+#include "token.h"
+
+/* zend_function_entry */
+#include "Zend/zend_API.h"
+
+struct psi_context;
+struct psi_token;
+struct psi_parser;
+struct psi_call_frame;
+struct psi_decl;
+struct psi_impl;
+struct psi_decl_arg;
+struct psi_decl_extvar;
+struct psi_let_exp;
+
+struct psi_context_ops {
+ /* library */
+ const char *name;
+ /* called once */
+ bool (*load)(void);
+ void (*free)(void);
+ /* called for each new context */
+ bool (*init)(struct psi_context *C);
+ void (*dtor)(struct psi_context *C);
+ /* compiler */
+ bool (*composite_init)(struct psi_context *C, struct psi_decl_arg *darg);
+ void (*composite_dtor)(struct psi_context *C, struct psi_decl_arg *darg);
+ bool (*extvar_init)(struct psi_context *C, struct psi_decl_extvar *evar);
+ void (*extvar_dtor)(struct psi_context *C, struct psi_decl_extvar *evar);
+ bool (*decl_init)(struct psi_context *C, struct psi_decl *decl);
+ void (*decl_dtor)(struct psi_context *C, struct psi_decl *decl);
+ bool (*impl_init)(struct psi_context *C, struct psi_impl *impl, zif_handler *zh);
+ void (*impl_dtor)(struct psi_context *C, struct psi_impl *impl);
+ bool (*cb_init)(struct psi_context *C, struct psi_let_exp *cb, struct psi_impl *impl);
+ void (*cb_dtor)(struct psi_context *C, struct psi_let_exp *cb, struct psi_impl *impl);
+ /* calls */
+ void (*call)(struct psi_call_frame *frame);
+ void (*call_va)(struct psi_call_frame *frame);
+ /* types */
+ void *(*typeof_impl)(struct psi_context *C, token_t impl_type);
+ void *(*typeof_decl)(struct psi_context *C, token_t decl_type);
+ void *(*copyof_type)(struct psi_context *C, void *orig_type);
+ void (*layoutof_type)(struct psi_context *C, void *orig_type, struct psi_layout *l);