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c343298b8f
A return statement needs something to return, so implement
integer-literal-expression too. This necessarily also forced
UnknownExprSyntax, UnknownStmtSyntax, and UnknownDeclSyntax,
which are stand-in token buckets for when we don't know
how to transform/migrate an AST.
This commit also contains the core function for caching
SyntaxData children. This is highly tricky code, with some
detailed comments in SyntaxData.{h,cpp}. The gist is that
we have to atomically swap in a SyntaxData pointer into the
child field, so we can maintain pointer identity of SyntaxData
nodes, while still being able to cache them internally.
To prove that this works, there is a multithreaded test that
checks that two threads can ask for a child that hasn't been
cached yet without crashing or violating pointer identity.
https://bugs.swift.org/browse/SR-4010
12 lines
243 B
C++
12 lines
243 B
C++
#include "swift/Syntax/ExprSyntax.h"
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#include "swift/Syntax/SyntaxFactory.h"
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#include "llvm/ADT/SmallString.h"
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#include "gtest/gtest.h"
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using namespace swift;
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using namespace swift::syntax;
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#pragma mark - integer-literal-expression
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// TODO
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