Fix FILE_PATTERNS of Doxyfile and some of the issues it was hiding (#2446)

`FILE_PATTERNS` is a space-separated list, in contrary to what is
suggested by its documentation. The pattern `*.h, *.c` does not
match header files but files with `.h,` extension only. Rewriting
the current comma-separated pattern makes Doxygen actually process
header files. However, it also reveals several hitherto hidden
issues (mostly missing documentation) in the code. This patch fixes
some of these documentation problems (and lists the files with
outstanding issues in a 'backlog').

JerryScript-DCO-1.0-Signed-off-by: Akos Kiss akiss@inf.u-szeged.hu

Doxyfile

@@ -778,7 +778,7 @@ INPUT_ENCODING         = UTF-8
 # *.md, *.mm, *.dox, *.py, *.f90, *.f, *.for, *.tcl, *.vhd, *.vhdl, *.ucf,
 # *.qsf, *.as and *.js.
 
-FILE_PATTERNS          = *.h, *.c
+FILE_PATTERNS          = *.h *.c
 
 # The RECURSIVE tag can be used to specify whether or not subdirectories should
 # be searched for input files as well.
@@ -793,7 +793,21 @@ RECURSIVE              = YES
 # Note that relative paths are relative to the directory from which doxygen is
 # run.
 
-EXCLUDE                =
+# FIXME: None of these files are excluded light-heartedly. They should be
+# removed one-by-one and warnings reported by doxygen should be fixed by those
+# who are familiar with the undocumented parts.
+EXCLUDE                = \
+        jerry-core/ecma/base/ecma-globals.h \
+        jerry-core/ecma/base/ecma-helpers.h \
+        jerry-core/ecma/operations/ecma-exceptions.h \
+        jerry-core/include/jerryscript-debugger-transport.h \
+        jerry-core/jcontext/jcontext.h \
+        jerry-core/parser/js/byte-code.h \
+        jerry-core/parser/js/common.h \
+        jerry-core/parser/js/js-lexer.h \
+        jerry-core/parser/js/js-parser-internal.h \
+        jerry-core/parser/regexp/re-parser.h \
+        jerry-core/vm/vm-stack.h
 
 # The EXCLUDE_SYMLINKS tag can be used to select whether or not files or
 # directories that are symbolic links (a Unix file system feature) are excluded
@@ -809,7 +823,7 @@ EXCLUDE_SYMLINKS       = NO
 # Note that the wildcards are matched against the file with absolute path, so to
 # exclude all test directories for example use the pattern */test/*
 
-EXCLUDE_PATTERNS       =
+EXCLUDE_PATTERNS       = *.inc.h
 
 # The EXCLUDE_SYMBOLS tag can be used to specify one or more symbol names
 # (namespaces, classes, functions, etc.) that should be excluded from the
@@ -2000,7 +2014,7 @@ INCLUDE_FILE_PATTERNS  =
 # recursively expanded use the := operator instead of the = operator.
 # This tag requires that the tag ENABLE_PREPROCESSING is set to YES.
 
-PREDEFINED             = JERRY_STATIC_ASSERT(x,y)=
+PREDEFINED             = JERRY_STATIC_ASSERT(x,y)= JERRY_ATTR_FORMAT(x,y,z)=
 
 # If the MACRO_EXPANSION and EXPAND_ONLY_PREDEF tags are set to YES then this
 # tag can be used to specify a list of macro names that should be expanded. The