src/codegen-proto.lisp: Fix printing of `if`/`else if' ladders.

Should be in a nice column, rather than marching across to the right
margin like a mad thing.

diff --git a/src/codegen-proto.lisp b/src/codegen-proto.lisp
index c1156716fefff6c01f1228cd92b903eacab669f4..7a6be338cc20662292c2d8341ee82102bf5c1641 100644 (file)
--- a/src/codegen-proto.lisp
+++ b/src/codegen-proto.lisp
@@ -255,11 +255,18 @@ (definst block (stream :export t) (decls body)
          decls body))
 
 (definst if (stream :export t) (#1=#:cond conseq &optional alt)
-  (format-compound-statement (stream conseq alt)
-    (format stream "if (~A)" #1#))
-  (when alt
-    (format-compound-statement (stream alt)
-      (write-string "else" stream))))
+  (let ((stmt "if"))
+    (loop (format-compound-statement (stream conseq (if alt t nil))
+           (format stream "~A (~A)" stmt #1#))
+         (typecase alt
+           (null (return))
+           (if-inst (setf stmt "else if"
+                          #1# (inst-cond alt)
+                          conseq (inst-conseq alt)
+                          alt (inst-alt alt)))
+           (t (format-compound-statement (stream alt)
+                (format stream "else"))
+              (return))))))
 
 (definst while (stream :export t) (#1=#:cond body)
   (format-compound-statement (stream body)