contrib/objcwrapper: print clang style parsing errors

Signed-off-by: Alexis Laferrière <alexis.laf@xymus.net>

diff --git a/contrib/objcwrapper/src/objcwrapper.nit b/contrib/objcwrapper/src/objcwrapper.nit
index 6ec6b6b..71e86ed 100644 (file)
--- a/contrib/objcwrapper/src/objcwrapper.nit
+++ b/contrib/objcwrapper/src/objcwrapper.nit
@@ -58,7 +58,18 @@ for src in opts.rest do
 
        # Check for errors
        if root isa NError then
-               print_error "Syntax Error: {root.message}: {root.position or else ""}"
+               var pos = root.position
+               print_error "Syntax Error: {root.message}, at {pos or else ""}"
+               print_error "in {src}"
+               if pos != null then
+                       var lines = content.split("\n")
+                       for line in [pos.line_start..pos.line_end] do
+                               print_error lines[line-1]
+                       end
+
+                       var ptr = " "*(pos.col_start-1).max(0) + "^"*(pos.col_end-pos.col_start)
+                       print_error ptr
+               end
                continue
        end