cproc: Implement defer statement.defer

implemented by keeping a list of deferred blocks in a function, and
emitting them before scope exits (return, lbracket, break, continue)

TODO: error checking, the compiler should error should a compile time
jump (goto) would go over a defer statement.

1 files changed, 4 insertions, 0 deletions

diff --git a/cc.h b/cc.h
index cb53b0d..fabc460 100644
--- a/cc.h
+++ b/cc.h
@@ -26,6 +26,7 @@ enum tokenkind {
 	TCONSTEXPR,
 	TCONTINUE,
 	TDEFAULT,
+	TDEFER,
 	TDO,
 	TDOUBLE,
 	TELSE,
@@ -558,6 +559,9 @@ struct value *mkintconst(unsigned long long);
 struct func *mkfunc(struct decl *, char *, struct type *, struct scope *);
 void delfunc(struct func *);
 struct type *functype(struct func *);
+void funcstartdefer(struct func *);
+void funcenddefer(struct func *);
+void funcdefer(struct func *);
 void funclabel(struct func *, struct block *);
 struct value *funcexpr(struct func *, struct expr *);
 void funcjmp(struct func *, struct block *);