Support file name and line argument in Kernel.eval .

Only a nil binding will be supported.

mrbgems/mruby-eval/src/eval.c

 #include "mruby.h"
 #include "mruby/compile.h"
 
+static struct RProc*
+create_proc_from_string(mrb_state *mrb, char *s, int len, mrb_value binding, char *file, mrb_int line)
+{
+  mrbc_context *cxt;
+  struct mrb_parser_state *p;
+  struct RProc *proc;
+
+  if (!mrb_nil_p(binding)) {
+    mrb_raise(mrb, E_ARGUMENT_ERROR, "Binding of eval must be nil.");
+  }
+
+  cxt = mrbc_context_new(mrb);
+  cxt->lineno = line;
+  if (file) {
+    mrbc_filename(mrb, cxt, file);
+  }
+
+  p = mrb_parser_new(mrb);
+  p->s = s;
+  p->send = s + len;
+  mrb_parser_parse(p, cxt);
+
+  if (0 < p->nerr) {
+    /* parse error */
+    char buf[256];
+    int n;
+    n = snprintf(buf, sizeof(buf), "line %d: %s\n", p->error_buffer[0].lineno, p->error_buffer[0].message);
+    mrb_parser_free(p);
+    mrbc_context_free(mrb, cxt);
+    mrb_exc_raise(mrb, mrb_exc_new(mrb, E_SYNTAX_ERROR, buf, n));
+  }
+
+  proc = mrb_generate_code(mrb, p);
+
+  mrb_parser_free(p);
+  mrbc_context_free(mrb, cxt);
+
+  if (proc == NULL) {
+    /* codegen error */
+    mrb_raise(mrb, E_SCRIPT_ERROR, "codegen error");
+  }
+
+  return proc;
+}
+
 static mrb_value
 f_eval(mrb_state *mrb, mrb_value self)
 {
   char *s;
-  int len;
+  mrb_int len;
+  mrb_value binding = mrb_nil_value();
+  char *file = NULL;
+  mrb_int line = 1;
+  mrb_value ret;
+
+  mrb_get_args(mrb, "s|ozi", &s, &len, &binding, &file, &line);
+
+  ret = mrb_toplevel_run(mrb, create_proc_from_string(mrb, s, len, binding, file, line));
+  if (mrb->exc) {
+    mrb_exc_raise(mrb, mrb_obj_value(mrb->exc));
+  }
 
-  mrb_get_args(mrb, "s", &s, &len);
-  return mrb_load_nstring(mrb, s, len);
+  return ret;
 }
 
 void
 mrb_mruby_eval_gem_init(mrb_state* mrb)
 {
-  mrb_define_class_method(mrb, mrb->kernel_module, "eval", f_eval, MRB_ARGS_REQ(1));
+  mrb_define_class_method(mrb, mrb->kernel_module, "eval", f_eval, MRB_ARGS_REQ(1) | MRB_ARGS_OPT(3));
 }
 
 void

mrbgems/mruby-eval/test/eval.rb

@@ -6,3 +6,10 @@ end
 assert('eval') do
   assert_equal(10) { eval '1 * 10' }
 end
+
+assert('rest arguments of eval') do
+  assert_raise(ArgumentError) { Kernel.eval('0', 0, 'test', 0) }
+  assert_equal ['test', 'test.rb', 10] do
+    Kernel.eval('[\'test\', __FILE__, __LINE__]', nil, 'test.rb', 10)
+  end
+end