Add erlang functions used in Kernel

bryanjos · bryanjos · commit 634cc0510e2d · 2017-07-01T22:42:04.000-05:00
diff --git a/lib/elixir_script/passes/translate/function.ex b/lib/elixir_script/passes/translate/function.ex
@@ -68,23 +68,23 @@ defmodule ElixirScript.Translate.Function do
     )
 
     function_dec = J.function_declaration(
-                ElixirScript.Translate.Identifier.make_function_name(name),
-                [J.rest_element(J.identifier("__function_args__"))],
-                [],
-                J.block_statement([
-                  arg_matches_declaration,
-                  clauses,
-                  J.throw_statement(
-                    J.new_expression(
-                      J.member_expression(
-                        patterns_ast(),
-                        J.identifier("MatchError")
-                      ),
-                      [J.identifier("__function_args__")]
-                    )
-                  )
-                ])
-              )
+      ElixirScript.Translate.Identifier.make_function_name(name),
+      [J.rest_element(J.identifier("__function_args__"))],
+      [],
+      J.block_statement([
+        arg_matches_declaration,
+        clauses,
+        J.throw_statement(
+          J.new_expression(
+            J.member_expression(
+              patterns_ast(),
+              J.identifier("MatchError")
+            ),
+            [J.identifier("__function_args__")]
+          )
+        )
+      ])
+    )
 
     { function_dec, state }
   end
diff --git a/src/javascript/lib/core/erlang_compat/erlang.js b/src/javascript/lib/core/erlang_compat/erlang.js
@@ -245,6 +245,70 @@ function tuple_to_list(tuple) {
   return list;
 }
 
+function abs(number) {
+  return Math.abs(number);
+}
+
+function apply(...args) {
+  if (args.length === 2) {
+    return args[0].apply(this, ...args[1]);
+  }
+
+  return args[0][atom_to_binary(args[1])].apply(this, ...args[2]);
+}
+
+function binary_part(binary, start, length) {
+  return binary.substring(start, start + length);
+}
+
+function bit_size(bitstring) {
+  return bitstring.bit_size;
+}
+
+function byte_size(bitstring) {
+  return bitstring.byte_size;
+}
+
+function hd(list) {
+  return list[0];
+}
+
+function length(list) {
+  return list.length;
+}
+
+function make_ref() {
+  return new ErlangTypes.Reference();
+}
+
+function map_size(map) {
+  return Object.keys(map).length;
+}
+
+function max(first, second) {
+  return Math.max(first, second);
+}
+
+function min(first, second) {
+  return Math.min(first, second);
+}
+
+function round(number) {
+  return Math.round(number);
+}
+
+function tl(list) {
+  return list.slice(1);
+}
+
+function trunc(number) {
+  return Math.trunc(number);
+}
+
+function tuple_size(tuple) {
+  return tuple.length;
+}
+
 export default {
   atom_to_binary,
   binary_to_atom,
@@ -294,4 +358,19 @@ export default {
   append_element,
   delete_element,
   tuple_to_list,
+  abs,
+  apply,
+  binary_part,
+  bit_size,
+  byte_size,
+  hd,
+  length,
+  make_ref,
+  map_size,
+  max,
+  min,
+  round,
+  tl,
+  trunc,
+  tuple_size
 };
