Add basic `defer` implementation.

We don't have any closures yet, so it's essentially the same as just
moving the statement after the `defer` keyword to the end of the block/
right before returning from the function.

1 files changed, 1 insertions, 0 deletions

diff --git a/src/ast.h b/src/ast.h
index 39d1a4e..09d15d1 100644
--- a/src/ast.h
+++ b/src/ast.h
@@ -28,6 +28,7 @@
   F(AST_CONDITIONAL, "conditional expression")                                 \
   F(AST_IF, "if statement")                                                    \
   F(AST_WHILE, "while statement")                                              \
+  F(AST_DEFER, "defer statement")                                              \
   F(AST_FOR, "for statement")                                                  \
   F(AST_VARDECL, "variable decl")                                              \
   F(AST_LOCAL_VAR, "local variable")                                           \