- Extend the GLR parser to allow conditional reduction based on the
guard functions;
- Implement two simple guards (contextual-override/final) for cxx.bnf;
- layering: clangPseudoCXX depends on clangPseudo (as the guard function need
to access the TokenStream);
Differential Revision: https://reviews.llvm.org/D127448
- define a common data structure Language which is a compiled result of the
bnf grammar. It is defined in Language.h;
- creates a clangPseudoCLI lib which defines a grammar commandline flag and
expose a function to get the Language. It supports --grammar=cxx,
--grammmar=/path/to/file.bnf;
- use the clangPseudoCLI in clang-pseudo, fuzzer, and benchmark tools (
simplify the code and use the prebuilt cxx grammar);
Split out from https://reviews.llvm.org/D127448.
Differential Revision: https://reviews.llvm.org/D128679
Error-tolerant bracket matching enables our error-tolerant parsing strategies.
The implementation here is *not* yet error tolerant: this patch sets up the APIs
and plumbing, and describes the planned approach.
Differential Revision: https://reviews.llvm.org/D125911
- add missing benchmark for lex/preprocess steps
- name benchmarks after the function they're benchmarking, when appropriate
- remove unergonomic "run" prefixes from benchmark names
- give a useful error message if --grammar or --source are missing
- Use realistic example of how to run, run all benchmarks by default.
(for someone who doesn't know the commands, this is the most useful action)
- Improve typos/wording in comment
- clean up unused vars
- avoid "parseable stream" name, which isn't a great name & not one I expected
to escape from ClangPseudoMain
Differential Revision: https://reviews.llvm.org/D125312
With this patch, we're able to parse smaller chunks of C++ code (statement,
declaration), rather than translation-unit.
The start symbol is listed in the grammar in a form of `_ :=
statement`, each start symbol has a dedicated state (`_ := • statement`).
We create and track all these separate states in the LRTable. When we
start parsing, we lookup the corresponding state to start the parser.
LR pasing table changes with this patch:
- number of states: 1467 -> 1471
- number of actions: 82891 -> 83578
- size of the table (bytes): 334248 -> 336996
Differential Revision: https://reviews.llvm.org/D125006
Haojian Wu