Here is a list of all files with brief descriptions:

[detail level 12]

build
doc_internal
doc_internal
libxml
xml.h
xml.l
src
aliases.cpp
aliases.h
anchor.cpp
anchor.h
arguments.cpp
arguments.h
cache.h
caseconvert.h
cite.cpp
cite.h
clangparser.cpp
clangparser.h
classdef.cpp
classdef.h
classlist.cpp
classlist.h
cmdmapper.cpp
cmdmapper.h
code.h
code.l
codefragment.cpp
codefragment.h
commentcnv.h	First pass comment processing
commentcnv.l
commentscan.h	Interface for the comment block scanner
commentscan.l
conceptdef.cpp
conceptdef.h
condparser.cpp
condparser.h
config.h
configimpl.h
configimpl.l
configoptions.h
constexp.h
constexp.l
constexp_p.h	Private interface between Parser (constexp.y) and Lexer (constexp.l)
construct.h
containers.h
cppvalue.cpp
cppvalue.h
datetime.cpp
datetime.h
debug.cpp
debug.h
declinfo.h
declinfo.l
defargs.h
defargs.l
defgen.cpp
defgen.h
define.h
definition.cpp
definition.h
definitionimpl.h
devnullgen.h
dia.cpp
dia.h
diagram.cpp
diagram.h
dir.cpp
dir.h
dirdef.cpp
dirdef.h
docbookgen.cpp
docbookgen.h
docbookvisitor.cpp
docbookvisitor.h
docgroup.cpp
docgroup.h
docnode.cpp
docnode.h
docparser.cpp
docparser.h
docparser_p.h	Private header shared between docparser.cpp and docnode.cpp
docsets.cpp
docsets.h
doctokenizer.h
doctokenizer.l
docvisitor.cpp
docvisitor.h
dot.cpp
dot.h
dotattributes.h
dotcallgraph.cpp
dotcallgraph.h
dotclassgraph.cpp
dotclassgraph.h
dotdirdeps.cpp
dotdirdeps.h
dotfilepatcher.cpp
dotfilepatcher.h
dotgfxhierarchytable.cpp
dotgfxhierarchytable.h
dotgraph.cpp
dotgraph.h
dotgroupcollaboration.cpp
dotgroupcollaboration.h
dotincldepgraph.cpp
dotincldepgraph.h
dotlegendgraph.cpp
dotlegendgraph.h
dotnode.cpp
dotnode.h
dotrunner.cpp
dotrunner.h
doxygen.cpp
doxygen.h
doxygen_lex.h
eclipsehelp.cpp
eclipsehelp.h
emoji.cpp
emoji.h
entry.cpp
entry.h
example.h
filedef.cpp
filedef.h
fileinfo.cpp
fileinfo.h
filename.h
fileparser.cpp
fileparser.h
formula.cpp
formula.h
fortrancode.h
fortrancode.l
fortranscanner.h
fortranscanner.l
ftvhelp.cpp
ftvhelp.h
groupdef.cpp
groupdef.h
growbuf.h
growvector.h
htags.cpp
htags.h
htmlattrib.h
htmldocvisitor.cpp
htmldocvisitor.h
htmlentity.cpp
htmlentity.h
htmlgen.cpp
htmlgen.h
htmlhelp.cpp
htmlhelp.h
image.cpp
image.h
index.cpp	This file contains functions for the various index pages
index.h
indexlist.h
language.cpp
language.h
latexdocvisitor.cpp
latexdocvisitor.h
latexgen.cpp
latexgen.h
layout.cpp
layout.h
lexcode.h
lexcode.l
lexscanner.h
lexscanner.l
linkedmap.h
main.cpp	Main entry point for doxygen
mandocvisitor.cpp
mandocvisitor.h
mangen.cpp
mangen.h
markdown.cpp
markdown.h
memberdef.cpp
memberdef.h
membergroup.cpp
membergroup.h
memberlist.cpp
memberlist.h
membername.h
message.cpp
message.h
moduledef.cpp
moduledef.h
msc.cpp
msc.h
namespacedef.cpp
namespacedef.h
outputgen.cpp
outputgen.h
outputlist.cpp
outputlist.h
pagedef.cpp
pagedef.h
parserintf.h
perlmodgen.cpp
perlmodgen.h
plantuml.cpp
plantuml.h
portable.cpp
portable.h	Portable versions of functions that are platform dependent
pre.h
pre.l
printdocvisitor.h
pycode.h
pycode.l
pyscanner.h
pyscanner.l
qcstring.cpp
qcstring.h
qhp.cpp
qhp.h
reflist.cpp
reflist.h
regex.cpp
regex.h
resourcemgr.cpp
resourcemgr.h
rtfdocvisitor.cpp
rtfdocvisitor.h
rtfgen.cpp
rtfgen.h
rtfstyle.cpp
rtfstyle.h
scanner.h
scanner.l
scopedtypevariant.h
searchindex.cpp
searchindex.h	Web server based search engine
searchindex_js.cpp
searchindex_js.h	Javascript based search engine
section.h
singlecomment.cpp
singlecomment.h
sitemap.cpp
sitemap.h
sqlcode.h
sqlcode.l
sqlite3gen.cpp
sqlite3gen.h
stlsupport.cpp
stlsupport.h
stringutil.h	Some helper functions for std::string
symbolmap.h
symbolresolver.cpp
symbolresolver.h
tagreader.cpp
tagreader.h
textdocvisitor.cpp
textdocvisitor.h
textstream.h
threadpool.h
tooltip.cpp
tooltip.h
trace.cpp
trace.h
translator.h
translator_adapter.h
translator_am.h
translator_ar.h
translator_bg.h
translator_br.h
translator_ca.h
translator_cn.h
translator_cz.h
translator_de.h
translator_dk.h	Danish translation
translator_en.h
translator_eo.h
translator_es.h
translator_fa.h
translator_fi.h
translator_fr.h
translator_gr.h
translator_hi.h
translator_hr.h
translator_hu.h
translator_id.h
translator_it.h
translator_je.h
translator_jp.h
translator_ke.h
translator_kr.h
translator_lt.h
translator_lv.h
translator_mk.h
translator_nl.h
translator_no.h
translator_pl.h
translator_pt.h
translator_ro.h
translator_ru.h
translator_sc.h
translator_si.h
translator_sk.h
translator_sr.h
translator_sv.h
translator_tr.h
translator_tw.h
translator_ua.h
translator_vi.h
translator_za.h
types.h	This file contains a number of basic enums and types
utf8.cpp
utf8.h	Various UTF8 related helper functions
util.cpp
util.h	A bunch of utility functions
vhdlcode.h
vhdlcode.l
vhdldocgen.cpp
vhdldocgen.h
vhdljjparser.cpp
vhdljjparser.h
xmlcode.h
xmlcode.l
xmldocvisitor.cpp
xmldocvisitor.h
xmlgen.cpp
xmlgen.h
vhdlparser
CharStream.h
ErrorHandler.h
JavaCC.h
ParseException.h
Token.h
TokenManager.h
TokenMgrError.h
VhdlParser.h
VhdlParserConstants.h
VhdlParserErrorHandler.hpp
VhdlParserTokenManager.h
vhdlstring.h