summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
-rw-r--r--doc/manual.tex2
-rw-r--r--src/jscomp.sig4
-rw-r--r--src/jscomp.sml12
-rw-r--r--src/main.mlton.sml3
4 files changed, 20 insertions, 1 deletions
diff --git a/doc/manual.tex b/doc/manual.tex
index 457df39b..144c2017 100644
--- a/doc/manual.tex
+++ b/doc/manual.tex
@@ -266,6 +266,8 @@ sqlite3 path/to/database/file <app.sql
\item \texttt{-dumpSource}: When compilation fails, output to stderr the complete source code of the last intermediate program before the compilation phase that signaled the error. (Warning: these outputs can be very long and aren't especially optimized for readability!)
+\item \texttt{-explainEmbed}: Trigger more verbose error messages about inability to embed server-side values in client-side code.
+
\item \texttt{-limit class num}: Equivalent to the \texttt{limit} directive from \texttt{.urp} files
\item \texttt{-moduleOf FILENAME}: Prints the Ur/Web module name corresponding to source file \texttt{FILENAME}, exiting immediately afterward.
diff --git a/src/jscomp.sig b/src/jscomp.sig
index 929c507d..5b8723b4 100644
--- a/src/jscomp.sig
+++ b/src/jscomp.sig
@@ -29,4 +29,8 @@ signature JSCOMP = sig
val process : Mono.file -> Mono.file
+ val explainEmbed : bool ref
+ (* Output verbose error messages about inability to embed server-side
+ * values in client-side code? *)
+
end
diff --git a/src/jscomp.sml b/src/jscomp.sml
index 4a2c0365..bcabed0b 100644
--- a/src/jscomp.sml
+++ b/src/jscomp.sml
@@ -41,6 +41,8 @@ structure TM = BinaryMapFn(struct
val compare = U.Typ.compare
end)
+val explainEmbed = ref false
+
type state = {
decls : (string * int * (string * int * typ option) list) list,
script : string list,
@@ -267,7 +269,12 @@ fun process (file : file) =
((EApp ((ENamed n', loc), e), loc), st)
end)
- | _ => ((*Print.prefaces "Can't embed" [("t", MonoPrint.p_typ MonoEnv.empty t)];*)
+ | _ => (if !explainEmbed then
+ Print.prefaces "Can't embed" [("loc", Print.PD.string (ErrorMsg.spanToString loc)),
+ ("e", MonoPrint.p_exp MonoEnv.empty e),
+ ("t", MonoPrint.p_typ MonoEnv.empty t)]
+ else
+ ();
raise CantEmbed t)
fun unurlifyExp loc (t : typ, st) =
@@ -400,6 +407,9 @@ fun process (file : file) =
fun jsE inner (e as (_, loc), st) =
let
+ (*val () = Print.prefaces "jsExp" [("e", MonoPrint.p_exp MonoEnv.empty e),
+ ("loc", Print.PD.string (ErrorMsg.spanToString loc))]*)
+
val str = str loc
fun patCon pc =
diff --git a/src/main.mlton.sml b/src/main.mlton.sml
index 71fefc48..bfc18e59 100644
--- a/src/main.mlton.sml
+++ b/src/main.mlton.sml
@@ -174,6 +174,9 @@ fun oneRun args =
else
Settings.addLimit (class, n);
doArgs rest)
+ | "-explainEmbed" :: rest =>
+ (JsComp.explainEmbed := true;
+ doArgs rest)
| arg :: rest =>
(if size arg > 0 andalso String.sub (arg, 0) = #"-" then
raise Fail ("Unknown flag " ^ arg)