document Grin generation process. remove code dealing with boxed literals. remove some irrelevant code paths that are never executed.
document Grin generation process. remove code dealing with boxed literals. remove some irrelevant code paths that are never executed.
hvr/jhc,shinnya/jhc-mirror,hvr/jhc,hvr/jhc,shinnya/jhc-mirror,shinnya/jhc-mirror,hvr/jhc,shinnya/jhc-mirror