Instead of interleaving typechecking and parsing
for SIL files, first parse the file for Swift
decls by skipping over any intermixed SIL decls.
Then we can perform type checking, and finally SIL
parsing where we now skip over Swift decls.
This is an intermediate step to requestifying the
parsing of a source file for its Swift decls.
- Introduce ide::CompletionInstance to manage CompilerInstance
- `CompletionInstance` vends the cached CompilerInstance when:
-- The compiler arguments (i.e. CompilerInvocation) has has not changed
-- The primary file is the same
-- The completion happens inside function bodies in both previous and
current completion
-- The interface hash of the primary file has not changed
- Otherwise, it vends a fresh CompilerInstance and cache it for the next
completion
rdar://problem/20787086
This type wraps a DeclName, indicating that it is a reference to a declaration that exists somewhere else and it requires slightly “fuzzy” comparison (i.e. if it’s not compound, only the base names should be compared). DeclName::matchesRef() and MemberLookupTable::find() both now take a DeclNameRef instead of a DeclName.
This commit temporarily allows implicit conversion from DeclName; I’ll flip the switch on that in a later commit.
Since we only call one parsing function (i.e. parseAbstructFunctionBody,
parseDecl, or parseStmtOrExpr), the parser stops at the end of the node.
It's not necessary to limit the Lexer to set an ArtificialEOF.
To minimize the parsing range, modify the Parser to *not* parse the body
if the completion happens in the signature.
Name binding can trigger swiftinterface compilation, which creates
a new ASTContext and runs a compilation job. If the compiler was
run with -stats-output-dir, this could trigger an assertion because
SharedTimer is not re-entrant.
Fix this by replacing all direct uses of SharedTimer in the frontend
with FrontendStatsTracer. SharedTimer is still used to _implement_
FrontendStatsTracer, however we can collapse some of the layers in
the implementation later. Many of the usages should also become
redundant over time once more code is converted over to requests.
- Rename code completion related names in 'PersistentParserState' so
it's clear when you are using.
- Refactor 'performCodeCompletionSecondPass()': Inline and consolidate
'parse*Delayed()' because they used to share many code.
rdar://problem/56926367
This PR introduces `@differentiable` attribute to mark functions as differentiable. This PR only contains changes related to parsing the attribute. Type checking and other changes will be added in subsequent patches.
See https://github.com/apple/swift/pull/27506/files#diff-f3216f4188fd5ed34e1007e5a9c2490f for examples and tests for the new attribute.
Previously delayed parsing was performed by AST walker
'ParseDelayedFunctionBodies' by finding "delayed" function decl from the AST
of the whole module. This is not necessary. Optimize it by remembering the
"delayed" function decl in 'PersistentParserState'.
NOTE: 'SourceLoader' stopped using this delayed parsing mechanism in
d8b745db77
rdar://problem/56819166
Optimize for libSyntax parsing.
The new 'parseListSyntax()' receives a vector storage, passes element
builder to the callback for populating the elements, then automatically
parses trailing commas. Also, it performs automatic recovery if the
element has an error (e.g. Skip until ',' or ')').
Like the last commit, SourceFile is used a lot by Parse and Sema, but
less so by the ClangImporter and (de)Serialization. Split it out to
cut down on recompilation times when something changes.
This commit does /not/ split the implementation of SourceFile out of
Module.cpp, which is where most of it lives. That might also be a
reasonable change, but the reason I was reluctant to is because a
number of SourceFile members correspond to the entry points in
ModuleDecl. Someone else can pick this up later if they decide it's a
good idea.
No functionality change.
Most of AST, Parse, and Sema deal with FileUnits regularly, but SIL
and IRGen certainly don't. Split FileUnit out into its own header to
cut down on recompilation times when something changes.
No functionality change.
So that we can easily detect 'ParsedSyntaxNode' leaking. When it's
moved, the original node become "null" node. In the destructor of
'ParsedSyntaxNode', assert the node is not "recorded" node.
- Stop producing 'backtick' trivia for escaping identifier token. '`'s
are now parts of the token text
- Adjust and simplify C++ libSyntax APIs
- Add 'is_deprecated' property to Trivia.py to attribute SwiftSyntax
APIs
rdar://problem/54810608
DelayedParsingCallbacks only had one implementation, for code
completion, which is only used to determine which bodies to skip and
which to delay. Inline that logic into the parser's delay logic and
remove DelayedParsingCallbacks entirely.
Rework the lazy function body parsing mechanism to use the
request-evaluator, so that asking for the body of a function will
initiate parsing. Clean up a number of callers to
AbstractFunctionDecl::getBody() that don't actually need the body, so
we don't perform unnecessary parsing.
This change does not delay parsing of function bodies in the general
case; rather, it sets up the infrastructure to always delay parsing of
function bodies.
