ensure that the fifo is closed in printToString()

[swankr.git] / swank.R

diff --git a/swank.R b/swank.R
index f3a85ccc6a8b0d770b9273180bb179e717fc736d..05b1c784f6aca534b4361349ba05adb9cc732529 100644 (file)
--- a/swank.R
+++ b/swank.R
@@ -230,10 +230,8 @@ writeSexpToString <- function(obj) {
 
 printToString <- function(val) {
   f <- fifo("")
-  sink(f)
-  print(val)
-  sink()
-  readLines(f)
+  tryCatch({ sink(f); print(val); sink(); readLines(f) },
+           finally=close(f))
 }
 
 `swank:connection-info` <- function (io, sldbState) {
@@ -262,6 +260,10 @@ printToString <- function(val) {
   "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))
@@ -291,3 +293,26 @@ printToString <- function(val) {
                                           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])
+}