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Major refactoring - new API for genthat and decorator
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,181 @@ | ||
| create_decorated_function <- function(fun, name, package, | ||
| onentry=NULL, onexit=NULL, onerror=NULL) { | ||
|
|
||
| stopifnot(is.function(fun)) | ||
| stopifnot(is_chr_scalar(name)) | ||
| stopifnot(is.null(package) || is_chr_scalar(package)) | ||
| stopifnot(is.null(onentry) || is.function(onentry)) | ||
| stopifnot(is.null(onexit) || is.function(onexit)) | ||
| stopifnot(is.null(onerror) || is.function(onerror)) | ||
| stopifnot(!all(is.null(onentry), is.null(onexit), is.null(onerror))) | ||
|
|
||
| prologue <- if (!is.null(onentry)) { | ||
| substitute( | ||
| ONENTRY( | ||
| list( | ||
| name=NAME, | ||
| package=PACKAGE, | ||
| seed=`__genthat_captured_seed`, | ||
| env=parent.frame(), | ||
| decorator="onentry" | ||
| ) | ||
| ), | ||
| list(ONENTRY=onentry, NAME=name, PACKAGE=package) | ||
| ) | ||
| } else { | ||
| NULL | ||
| } | ||
|
|
||
| onexit_call <- if (!is.null(onexit)) { | ||
| substitute( | ||
| ONEXIT( | ||
| list( | ||
| name=NAME, | ||
| package=PACKAGE, | ||
| seed=`__genthat_captured_seed`, | ||
| env=parent.frame(), | ||
| args=args, | ||
| retv=retv, | ||
| decorator="onexit" | ||
| ) | ||
| ), | ||
| list(ONEXIT=onexit, NAME=name, PACKAGE=package) | ||
| ) | ||
| } else { | ||
| NULL | ||
| } | ||
|
|
||
| onerror_call <- if (!is.null(onerror)) { | ||
| substitute( | ||
| ONERROR( | ||
| list( | ||
| name=NAME, | ||
| package=PACKAGE, | ||
| seed=`__genthat_captured_seed`, | ||
| env=parent.frame(), | ||
| args=args, | ||
| message=geterrmessage(), | ||
| decorator="onerror" | ||
| ) | ||
| ), | ||
| list(ONERROR=onerror, NAME=name, PACKAGE=package) | ||
| ) | ||
| } else { | ||
| NULL | ||
| } | ||
|
|
||
| epilogue <- if (!is.null(onexit_call) || !is.null(onerror_call)) { | ||
|
|
||
| expr <- if (!is.null(onexit_call) && !is.null(onerror_call)) { | ||
| substitute( | ||
| if (!identical(retv, default)) { | ||
| onexit_call | ||
| } else { | ||
| onerror_call | ||
| } | ||
| ) | ||
| } else if (!is.null(onexit_call)) { | ||
| substitute( | ||
| if (!identical(retv, default)) { | ||
| onexit_call | ||
| } | ||
| ) | ||
| } else { | ||
| substitute( | ||
| if (identical(retv, default)) { | ||
| onerror_call | ||
| } | ||
| ) | ||
| } | ||
|
|
||
| substitute( | ||
| on.exit({ | ||
| if (.Internal(getOption("genthat.tracing"))) { | ||
| .Internal(options(genthat.tracing=FALSE)) | ||
|
|
||
| default <- genthat:::.genthat_default_retv | ||
| retv <- returnValue(default=default) | ||
| args <- as.list(match.call())[-1] | ||
|
|
||
| expr | ||
|
|
||
| .Internal(options(genthat.tracing=TRUE)) | ||
| } | ||
| }) | ||
| ) | ||
| } else { | ||
| NULL | ||
| } | ||
|
|
||
| # this one will capture the first argument passed to `fun<-` | ||
| genthat_tmp <- if (endsWith(name, "<-")) { | ||
| substitute(`__genthat_tmp` <- ARG_NAME, list(ARG_NAME=as.name(names(formals(fun))[1]))) | ||
| } else { | ||
| NULL | ||
| } | ||
|
|
||
| obody <- body(fun) | ||
|
|
||
| # the epilogue is above the body since it will be run in the on.exit handler | ||
| nbody <- if (!is.null(prologue) && !is.null(epilogue)) { | ||
| if (is.null(genthat_tmp)) { | ||
| substitute({ | ||
| `__genthat_captured_seed` <- get(".Random.seed", envir=globalenv()) | ||
|
|
||
| prologue | ||
| epilogue | ||
| obody | ||
| }) | ||
| } else { | ||
| substitute({ | ||
| `__genthat_captured_seed` <- get(".Random.seed", envir=globalenv()) | ||
| genthat_tmp | ||
|
|
||
| prologue | ||
| epilogue | ||
| obody | ||
| }) | ||
| } | ||
| } else if (!is.null(prologue)) { | ||
| if (is.null(genthat_tmp)) { | ||
| substitute({ | ||
| `__genthat_captured_seed` <- get(".Random.seed", envir=globalenv()) | ||
|
|
||
| prologue | ||
| obody | ||
| }) | ||
| } else { | ||
| substitute({ | ||
| `__genthat_captured_seed` <- get(".Random.seed", envir=globalenv()) | ||
| genthat_tmp | ||
|
|
||
| prologue | ||
| obody | ||
| }) | ||
| } | ||
| } else if (!is.null(epilogue)) { | ||
| if (is.null(genthat_tmp)) { | ||
| substitute({ | ||
| `__genthat_captured_seed` <- get(".Random.seed", envir=globalenv()) | ||
| genthat_tmp | ||
|
|
||
| epilogue | ||
| obody | ||
| }) | ||
| } else { | ||
| substitute({ | ||
| `__genthat_captured_seed` <- get(".Random.seed", envir=globalenv()) | ||
| genthat_tmp | ||
|
|
||
| epilogue | ||
| obody | ||
| }) | ||
| } | ||
| } else { | ||
| stop("Not possible") | ||
| } | ||
|
|
||
| # we do not copy attributes since we are only interested in | ||
| # the body of the function | ||
| create_function(params=formals(fun), body=nbody, env=environment(fun)) | ||
| } |
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