gcc-parser: handle Clang's "NNN errors generated." messages

... without reporting syntax errors

Reported-By: Lukas Zaoral

Author: kdudka

gcc-parser.cc

@@ -174,11 +174,15 @@ EToken Tokenizer::readNext(DefEvent *pEvt) {
     return tok;
 }
 
+#define RE_CLANG_EVT "(?:error|warning)"
+#define RE_CLANG_CNT_EVTS "(?:(?:1 " RE_CLANG_EVT \
+    ")|(?:[0-9]+ " RE_CLANG_EVT "s))"
+
 class NoiseFilter: public AbstractTokenFilter {
     public:
         NoiseFilter(ITokenizer *slave):
             AbstractTokenFilter(slave),
-            reClangWarnCnt_("^((1 warning)|([0-9]+ warnings)) generated\\.$")
+            reClangWarnCnt_("^" RE_CLANG_CNT_EVTS " generated\\.$")
         {
         }
 

tests/CMakeLists.txt

@@ -172,6 +172,7 @@ test_csgrep(csgrep      "52-gcc-parser-clang-nss"     )
 test_csgrep(csgrep      "53-csparser-note-events"     )
 test_csgrep(csgrep      "54-csparser-unknown-lineno"  )
 test_csgrep(csgrep      "55-csparser-pylint-copr"     )
+test_csgrep(csgrep      "56-gcc-sparser-clang-error"  )
 test_csparser(csparser-5.8                          00)
 test_csparser(csparser-5.8                          01)
 test_csparser(csparser-5.8                          02)

tests/csgrep/56-gcc-sparser-clang-error-args.txt

@@ -0,0 +1 @@
+2>&1

tests/csgrep/56-gcc-sparser-clang-error-stdin.txt

@@ -0,0 +1,4 @@
+test.c:3:5: error: use of undeclared identifier 'test'
+    test;
+    ^
+1 error generated.

tests/csgrep/56-gcc-sparser-clang-error-stdout.txt

@@ -0,0 +1,4 @@
+Error: COMPILER_WARNING:
+test.c:3:5: error: use of undeclared identifier 'test'
+#    test;
+#    ^