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Merge pull request #1211 from facebook/staticAssert

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updated DEBUG_STATIC_ASSERT()
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Yann Collet 2018-06-27 12:19:17 -07:00 committed by GitHub
commit 121aa2c388
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1 changed files with 7 additions and 5 deletions
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12
lib/common/debug.h
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@ -35,9 +35,10 @@
/*
* The purpose of this header is to enable debug functions.
* They regroup assert(), DEBUGLOG() and RAWLOG().
* They regroup assert(), DEBUGLOG() and RAWLOG() for run-time,
* and DEBUG_STATIC_ASSERT() for compile-time.
*
* By default, DEBUGLEVEL==0, which means debug is disabled.
* By default, DEBUGLEVEL==0, which means run-time debug is disabled.
*
* Level 1 enables assert() only.
* Starting level 2, traces can be generated and pushed to stderr.
@ -57,8 +58,9 @@ extern "C" {
/* static assert is triggered at compile time, leaving no runtime artefact,
* but can only work with compile-time constants */
#define DEBUG_STATIC_ASSERT(c) { enum { DEBUG_static_assert = 1/(int)(!!(c)) }; }
* but can only work with compile-time constants.
* This variant can only be used inside a function. */
#define DEBUG_STATIC_ASSERT(c) (void)sizeof(char[(c) ? 1 : -1])
/* DEBUGLEVEL is expected to be defined externally,
@ -69,7 +71,7 @@ extern "C" {
#endif
/* recommended values for DEBUGLEVEL :
* 0 : no debug, all functions disabled (except DEBUG_STATIC_ASSERT)
* 0 : no debug, all run-time functions disabled
* 1 : no display, enables assert() only
* 2 : reserved, for currently active debug path
* 3 : events once per object lifetime (CCtx, CDict, etc.)