mainLoop <- function(io) {
while(TRUE) {
- tryCatch(dispatch(io, readPacket(io)),
- swankTopLevel=function(c) NULL)
+ withRestarts(tryCatch(dispatch(io, readPacket(io)),
+ swankTopLevel=function(c) NULL),
+ abort="return to SLIME's toplevel")
}
}
ok <- TRUE
}, error=function(c) {
newSldbState <- makeSldbState(c, if(is.null(sldbState)) 0 else sldbState$level+1, id)
- sldbLoop(io, newSldbState, id) })},
+ withRestarts(sldbLoop(io, newSldbState, id), abort=paste("return to sldb level", newSldbState$level)) })},
finally=sendToEmacs(io, list(quote(`:return`), if(ok) list(quote(`:ok`), value) else list(quote(`:abort`)), id)))
}
makeSldbState <- function(condition, level, id) {
- ret <- list(condition=condition, level=level, id=id)
+ calls <- rev(sys.calls())[-1]
+ frames <- rev(sys.frames())[-1]
+ restarts <- rev(computeRestarts(condition))[-1]
+ ret <- list(condition=condition, level=level, id=id, restarts=restarts, calls=calls, frames=frames)
class(ret) <- c("sldbState", class(ret))
ret
}
sldbLoop <- function(io, sldbState, id) {
- sendToEmacs(io, c(list(quote(`:debug`), id, sldbState$level), debuggerInfoForEmacs(sldbState)))
- sendToEmacs(io, list(quote(`:debug-activate`), id, sldbState$level, FALSE))
- while(TRUE) {
- dispatch(io, readPacket(io), sldbState)
- }
-}
-
-debuggerInfoForEmacs <- function(sldbState, from=0, to=NULL) {
- backtraceForEmacs <- function() {
- calls <- rev(sys.calls())
- if(is.null(to)) to <- length(calls)
- from <- from+1
- calls <- lapply(calls[from:to], { frameNumber <- from-1;
- function (x) { ret <- list(frameNumber, paste(format(x), sep="", collapse=" ")); frameNumber <<- 1+frameNumber; ret }})
- }
- computeRestartsForEmacs <- function () {
- lapply(computeRestarts(sldbState$condition),
- function(x) {
- ## this is all a little bit internalsy
- restartName <- x[[1]][[1]]
- description <- restartDescription(x)
- list(restartName, if(is.null(description)) restartName else description)
- })
- }
- list(list(as.character(sldbState$condition), sprintf(" [%s]", class(sldbState$condition)[[1]]), FALSE),
- computeRestartsForEmacs(),
- backtraceForEmacs(),
- list(sldbState$id))
+ tryCatch({
+ sendToEmacs(io, c(list(quote(`:debug`), id, sldbState$level), `swank:debugger-info-for-emacs`(io, sldbState)))
+ sendToEmacs(io, list(quote(`:debug-activate`), id, sldbState$level, FALSE))
+ while(TRUE) {
+ dispatch(io, readPacket(io), sldbState)
+ }
+ }, finally=sendToEmacs(io, c(list(quote(`:debug-return`), id, sldbState$level, FALSE))))
}
readPacket <- function(io) {
writeSexpToStringLoop(obj)
}
+printToString <- function(val) {
+ f <- fifo("")
+ tryCatch({ sink(f); print(val); sink(); readLines(f) },
+ finally=close(f))
+}
+
`swank:connection-info` <- function (io, sldbState) {
list(quote(`:pid`), Sys.getpid(),
quote(`:package`), list(quote(`:name`), "R", quote(`:prompt`), "R> "),
`swank:listener-eval` <- function(io, sldbState, string) {
val <- eval(parse(text=string), envir = globalenv())
- f <- fifo("")
- sink(f)
- print(val)
- sink()
- lines <- readLines(f)
- list(quote(`:values`), paste(lines, collapse="\n"))
+ string <- printToString(val)
+ list(quote(`:values`), paste(string, collapse="\n"))
}
`swank:autodoc` <- function(io, sldbState, rawForm, ...) {
"No Arglist Information"
}
+`swank:operator-arglist` <- function(io, sldbState, op, package) {
+ list()
+}
+
`swank:throw-to-toplevel` <- function(io, sldbState) {
condition <- simpleCondition("Throw to toplevel")
class(condition) <- c("swankTopLevel", class(condition))
signalCondition(condition)
}
-`swank:debugger-info-for-emacs` <- function(io, sldbState, from, to) {
- debuggerInfoForEmacs(sldbState, from=from, to=to)
+`swank:backtrace` <- function(io, sldbState, from=0, to=NULL) {
+ calls <- sldbState$calls
+ if(is.null(to)) to <- length(calls)
+ from <- from+1
+ calls <- lapply(calls[from:to],
+ { frameNumber <- from-1;
+ function (x) {
+ ret <- list(frameNumber, paste(format(x), sep="", collapse=" "))
+ frameNumber <<- 1+frameNumber
+ ret
+ }
+ })
+}
+
+computeRestartsForEmacs <- function (sldbState) {
+ lapply(sldbState$restarts,
+ function(x) {
+ ## this is all a little bit internalsy
+ restartName <- x[[1]][[1]]
+ description <- restartDescription(x)
+ list(restartName, if(is.null(description)) restartName else description)
+ })
+}
+
+`swank:debugger-info-for-emacs` <- function(io, sldbState, from=0, to=NULL) {
+ list(list(as.character(sldbState$condition), sprintf(" [%s]", class(sldbState$condition)[[1]]), FALSE),
+ computeRestartsForEmacs(sldbState),
+ `swank:backtrace`(io, sldbState, from, to),
+ list(sldbState$id))
}
`swank:invoke-nth-restart-for-emacs` <- function(io, sldbState, level, n) {
if(sldbState$level == level) {
- invokeRestart(computeRestarts()[[n+1]])
+ invokeRestart(sldbState$restarts[[n+1]])
+ }
+}
+
+`swank:frame-source-location` <- function(io, sldbState, n) {
+ call <- sldbState$calls[[n+1]]
+ srcref <- attr(call, "srcref")
+ srcfile <- attr(srcref, "srcfile")
+ if(is.null(srcfile)) {
+ list(quote(`:error`), "no srcfile")
+ } else {
+ filename <- get("filename", srcfile)
+ list(quote(`:location`),
+ list(quote(`:file`), filename),
+ list(quote(`:line`), srcref[[1]], srcref[[2]]-1),
+ FALSE)
}
}
+
+`swank:buffer-first-change` <- function(io, sldbState, filename) {
+ FALSE
+}
+
+`swank:frame-locals-and-catch-tags` <- function(io, sldbState, index) {
+ str(sldbState$frames)
+ frame <- sldbState$frames[[1+index]]
+ objs <- ls(envir=frame)
+ list(lapply(objs, function(name) { list(quote(`:name`), name,
+ quote(`:id`), 0,
+ quote(`:value`), paste(printToString(eval(parse(text=name), envir=frame)), sep="", collapse="\n")) }),
+ list())
+}
+
+`swank:simple-completions` <- function(io, sldbState, prefix, package) {
+ ## fails multiply if prefix contains regexp metacharacters
+ matches <- apropos(sprintf("^%s", prefix), ignore.case=FALSE)
+ nmatches <- length(matches)
+ if(nmatches == 0) {
+ list(list(), "")
+ } else {
+ longest <- matches[order(nchar(matches))][1]
+ while(length(grep(sprintf("^%s", longest), matches)) < nmatches) {
+ longest <- substr(longest, 1, nchar(longest)-1)
+ }
+ list(as.list(matches), longest)
+ }
+}
+
+`swank:compile-string-for-emacs` <- function(io, sldbState, string, buffer, position, filename, policy) {
+ # FIXME: I think in parse() here we can use srcref to associate
+ # buffer/filename/position to the objects. Or something.
+ withRestarts({ times <- system.time(eval(parse(text=string), envir = globalenv())) },
+ abort="abort compilation")
+ list(quote(`:compilation-result`), list(), TRUE, times[3])
+}
+
+`swank:interactive-eval` <- function(io, sldbState, string) {
+ retry <- TRUE
+ value <- ""
+ while(retry) {
+ retry <- FALSE
+ withRestarts(value <- eval(parse(text=string), envir = globalenv()),
+ retry=list(description="retry SLIME interactive evaluation request", handler=function() retry <<- TRUE))
+ }
+ printToString(value)
+}
+
+`swank:eval-and-grab-output` <- function(io, sldbState, string) {
+ retry <- TRUE
+ value <- ""
+ output <- NULL
+ f <- fifo("")
+ tryCatch({
+ sink(f)
+ while(retry) {
+ retry <- FALSE
+ withRestarts(value <- eval(parse(text=string), envir = globalenv()),
+ retry=list(description="retry SLIME interactive evaluation request", handler=function() retry <<- TRUE))}},
+ finally={sink(); output <- readLines(f); close(f)})
+ list(output, printToString(value))
+}