1 files changed, 16 insertions, 0 deletions
diff --git a/src/macros.py b/src/macros.py
new file mode 100644
index 0000000000..39d05c9a42
--- /dev/null
+++ b/src/macros.py
@@ -0,0 +1,16 @@
+macro IS_BOOLEAN(arg)           = (typeof(arg) === 'boolean');
+macro IS_NULL(arg)              = (arg === null);
+macro IS_NULL_OR_UNDEFINED(arg) = (arg == null);
+macro IS_NUMBER(arg)            = (typeof(arg) === 'number');
+macro IS_STRING(arg)            = (typeof(arg) === 'string');
+macro IS_SYMBOL(arg)            = (typeof(arg) === 'symbol');
+macro IS_UNDEFINED(arg)         = (typeof(arg) === 'undefined');
+
+# These macros follow the semantics of V8's %_Is*() functions.
+macro IS_ARRAY(arg)             = (Array.isArray(arg));
+macro IS_DATE(arg)              = ((arg) instanceof Date);
+macro IS_FUNCTION(arg)          = (typeof(arg) === 'function');
+macro IS_OBJECT(arg)            = (typeof(arg) === 'object');
+macro IS_REGEXP(arg)            = ((arg) instanceof RegExp);
+
+macro IS_BUFFER(arg)            = ((arg) instanceof Buffer);