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Replaced std::exit() with return Carbon::ErrorOr for expected errors like invalid syntax (#1120)

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* Replaced std::exit() with return llvm::Expected/llvm::Error<T> for expected errors like invalid syntax.

* Use llvm::formatv() for formatting lexer error messages.
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* Addresed merge errors.

* Fixed impl scope.

* Made ErrorBuilder::operator<< nodiscard, to catch code forgetting 'return' in 'return FATAL_COMPILATION_ERROR()'.

* FatalComplationError() -> ParseAndLexContext::RecordLexerError().
Other usages of ERROR_TOKEN in lexer.lpp were actually supposed to be END_OF_FILE.

* Update executable_semantics/syntax/parse_and_lex_context.h

Co-authored-by: Jon Meow <jperkins@google.com>

* Code review fixes.

* Update executable_semantics/syntax/parser.ypp

Co-authored-by: Jon Meow <jperkins@google.com>

* More code review fixes.

* Update executable_semantics/interpreter/type_checker.h

Co-authored-by: Jon Meow <jperkins@google.com>

* Yet more code review fixes...

* Update executable_semantics/syntax/lexer.lpp

Co-authored-by: Jon Meow <jperkins@google.com>

* code review comments

* Update executable_semantics/interpreter/interpreter.cpp

Co-authored-by: Geoff Romer <gromer@google.com>

* Apply suggestions from code review

Co-authored-by: Jon Meow <jperkins@google.com>

* Update executable_semantics/syntax/lexer.lpp

Co-authored-by: Jon Meow <jperkins@google.com>

* code review

* code review

* Apply suggestions from code review

Co-authored-by: Jon Meow <jperkins@google.com>

* formatted code

* review comments

* Switched to the new ErrorOr<V> error implementation

* code review comments

* fixed comment

* restored ostream.h as #976 makes the change unnecesary

* review comments

Co-authored-by: Jon Meow <jperkins@google.com>
Co-authored-by: Geoff Romer <gromer@google.com>
This commit is contained in:
pk19604014
2022-03-22 16:17:04 -04:00
committed by GitHub
co-authored by Jon Meow Geoff Romer
parent e5a87af6fe
commit aa8a5f174d
43 changed files with 1324 additions and 873 deletions
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executable_semantics/interpreter/value.h
+4 -2
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@@ -76,13 +76,15 @@ class Value {
// Returns the sub-Value specified by `path`, which must be a valid field
// path for *this.
auto GetField(Nonnull<Arena*> arena, const FieldPath& path,
SourceLocation source_loc) const -> Nonnull<const Value*>;
SourceLocation source_loc) const
-> ErrorOr<Nonnull<const Value*>>;
// Returns a copy of *this, but with the sub-Value specified by `path`
// set to `field_value`. `path` must be a valid field path for *this.
auto SetField(Nonnull<Arena*> arena, const FieldPath& path,
Nonnull<const Value*> field_value,
SourceLocation source_loc) const -> Nonnull<const Value*>;
SourceLocation source_loc) const
-> ErrorOr<Nonnull<const Value*>>;
// Returns the enumerator corresponding to the most-derived type of this
// object.