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e76aee7e10
Composing error messages for `llvm::Error` is either done by using
`llvm::createStringError()` with an appropriate format string and
arguments or by writing to a `std::string`-backed
`llvm::raw_string_ostream` and passing the result to
`llvm::make_error<llvm::StringError>()` verbatim.
The new class `StreamStringError` encapsulates the latter solution
into a class with an appropriate stream operator and implicit cast
operators to `llvm::Error` and `llvm::Expected`.
Example usage:
llvm::Error foo(int i, size_t s, ...) {
...
if(...) {
return StreamStringError()
<< "Some error message with an integer: "
<< i << " and a size_t: " << s;
}
...
}
13 lines
369 B
C++
13 lines
369 B
C++
#include <zamalang/Support/Error.h>
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namespace mlir {
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namespace zamalang {
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// Specialized `operator<<` for `llvm::Error` that marks the error
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// as checked through `std::move` and `llvm::toString`
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StreamStringError &operator<<(StreamStringError &se, llvm::Error &err) {
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se << llvm::toString(std::move(err));
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return se;
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}
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} // namespace zamalang
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} // namespace mlir
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