compile: Check the validity of module filename before parsing.

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

diff --git a/src/syntax/syntax.nit b/src/syntax/syntax.nit
index 4ec5516..06c3bcb 100644 (file)
--- a/src/syntax/syntax.nit
+++ b/src/syntax/syntax.nit
@@ -32,6 +32,16 @@ special ModuleLoader
 
        redef fun parse_file(context, file, filename, name, dir)
        do
+               var name_is_valid = name.to_s.length > 0 and name.to_s[0].is_lower
+               for char in name.to_s do        if not char.is_digit and not char.is_letter and not char == '_'
+               then
+                       name_is_valid = false
+                       break
+               end
+               if not name_is_valid then
+                       context.error( null, "{filename}: Error package name \"{name}\", must start with a lower case letter and contain only letters, digits and '_'." )
+               end
+
                var lexer = new Lexer(file, filename)
                var parser = new Parser(lexer)
                var node_tree = parser.parse