support loading of modules from files specified at the command line

src/prolog/machine/compile.rs

@@ -81,6 +81,7 @@ fn load_module<R: Read>(wam: &mut Machine, name: &str, stream: ParsingStream<R>)
     }    
 }
 
+pub(super)
 fn load_module_from_file(wam: &mut Machine, filename: &str) -> Result<ClauseName, SessionError>
 {
     let path = fix_filename(wam.indices.atom_tbl.clone(), filename)?;

src/prolog/machine/mod.rs

@@ -217,6 +217,13 @@ impl Machine {
     }
 
     pub fn run_toplevel(&mut self) {
+	use std::env;
+	use prolog::machine::compile::load_module_from_file;
+
+	for filename in env::args() {
+	    load_module_from_file(self, &filename);
+	}
+	
         self.machine_st.p = CodePtr::Local(LocalCodePtr::DirEntry(self.toplevel_idx));
         self.run_query(&AllocVarDict::new());
     }