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authorTom Sepez <tsepez@chromium.org>2015-02-05 10:03:18 -0800
committerTom Sepez <tsepez@chromium.org>2015-02-05 10:03:18 -0800
commit35425896b07b5124651c249d6ce29285cf71ea3b (patch)
tree0cd30ec338fffdebb3aee6a899beeb3835c6f194 /third_party/base/macros.h
parent53476d6956781ceb252e1ae5e01f83a48bcb4908 (diff)
downloadpdfium-35425896b07b5124651c249d6ce29285cf71ea3b.tar.xz
Merge to XFA: Add namespace and-re-arrange PDFium's local copy of /base.
Original revieww URL: https://codereview.chromium.org/900753002 TBR=jam@chromium.org Review URL: https://codereview.chromium.org/880603004
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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// This file contains macros and macro-like constructs (e.g., templates) that
+// are commonly used throughout Chromium source. (It may also contain things
+// that are closely related to things that are commonly used that belong in this
+// file.)
+
+#ifndef PDFIUM_THIRD_PARTY_BASE_MACROS_H_
+#define PDFIUM_THIRD_PARTY_BASE_MACROS_H_
+
+// The COMPILE_ASSERT macro can be used to verify that a compile time
+// expression is true. For example, you could use it to verify the
+// size of a static array:
+//
+// COMPILE_ASSERT(ARRAYSIZE_UNSAFE(content_type_names) == CONTENT_NUM_TYPES,
+// content_type_names_incorrect_size);
+//
+// or to make sure a struct is smaller than a certain size:
+//
+// COMPILE_ASSERT(sizeof(foo) < 128, foo_too_large);
+//
+// The second argument to the macro is the name of the variable. If
+// the expression is false, most compilers will issue a warning/error
+// containing the name of the variable.
+
+#undef COMPILE_ASSERT
+#define COMPILE_ASSERT(expr, msg) static_assert(expr, #msg)
+
+#endif // PDFIUM_THIRD_PARTY_BASE_MACROS_H_