Add protoscope language, assembler, disassembler#734
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Adds `protoscope`, a human-readable text format for raw Protobuf binary wire payloads, to `protocompile`. It enables writing, parsing, compiling (assembly), and decompiling (disassembly) without requiring a schema. It supports multi-frame documents (separated by `---`) and transport framing (gRPC, ConnectRPC, and Varint delimited). - **Parser & AST (`internal/protoscope/parser`, `internal/protoscope/ast`)**: Parses tokens into an AST of fields, blocks (groups/length-delimited), values, and options. - **Assembler (`internal/protoscope/assembler`)**: Compiles AST nodes into raw Protobuf wire format. - **Disassembler (`internal/protoscope/disassembler`)**: Decompiles binary Protobuf payloads back to protoscope text format using heuristics. - **Public API (`protoscope`)**: Exposes public endpoints (`Assemble`, `Disassemble`, `Diagnostics`, `Hover`, and `Possibilities`) for integrations (e.g. Buf LSP). Handles frame splitting/joining, flags parsing, and context-aware hover info. - `Fuzz tests` and a few related fixes as a result of the fuzz testing. Changes in `experimental/internal/lexer/number.go` is an example of changes made to avoid a DoS vector that was revealed with this testing.
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Description
Adds
protoscope, a human-readable text format for raw Protobuf binary wire payloads, toprotocompile. It enables writing, parsing, compiling (assembly), and decompiling (disassembly) without requiring a schema. It supports multi-frame documents (separated by---) and transport framing (gRPC, ConnectRPC, and Varint delimited).Key Changes
internal/protoscope/parser,internal/protoscope/ast): Parses tokens into an AST of fields, blocks (groups/length-delimited), values, and options.internal/protoscope/assembler): Compiles AST nodes into raw Protobuf wire format.internal/protoscope/disassembler): Decompiles binary Protobuf payloads back to protoscope text format using heuristics.protoscope): Exposes public endpoints (Assemble,Disassemble,Diagnostics,Hover, andPossibilities) for integrations (e.g. Buf LSP). Handles frame splitting/joining, flags parsing, and context-aware hover info.Fuzz testsand a few related fixes as a result of the fuzz testing. Changes inexperimental/internal/lexer/number.gois an example of changes made to avoid a DoS vector that was revealed with this testing.