expr: Replace expression engine

Rework the expression engine to use recursive descent evaluation rather than
a shunting yard algorithm. Among other things, it is easier to make lazy operators
and the ternary operator work correctly.

In particular, the following expression no longer crashes: $(99?9,99?9:*9:999)?9)

And the code is now smaller.

Signed-off-by: Steve Bennett <steveb@workware.net.au>

1 files changed, 1 insertions, 1 deletions

diff --git a/jim.h b/jim.h
index 58e6e56..9338f86 100644
--- a/jim.h
+++ b/jim.h
@@ -816,7 +816,7 @@ JIM_EXPORT int Jim_GetReturnCode (Jim_Interp *interp, Jim_Obj *objPtr,
 
 /* expression object */
 JIM_EXPORT int Jim_EvalExpression (Jim_Interp *interp,
-        Jim_Obj *exprObjPtr, Jim_Obj **exprResultPtrPtr);
+        Jim_Obj *exprObjPtr);
 JIM_EXPORT int Jim_GetBoolFromExpr (Jim_Interp *interp,
         Jim_Obj *exprObjPtr, int *boolPtr);