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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.
x

* 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/syntax/parse_and_lex_context.h
+11 -2
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@@ -20,8 +20,11 @@ class ParseAndLexContext {
ParseAndLexContext(Nonnull<const std::string*> input_file_name, bool trace)
: input_file_name_(input_file_name), trace_(trace) {}
// Writes a syntax error diagnostic containing message to standard error.
auto PrintDiagnostic(const std::string& message) -> void;
// Formats ands records a lexer error. Returns an error token as a
// convenience.
auto RecordSyntaxError(const std::string& message,
bool prefix_with_newline = false)
-> Parser::symbol_type;
auto source_loc() const -> SourceLocation {
return SourceLocation(input_file_name_,
@@ -33,12 +36,18 @@ class ParseAndLexContext {
// The source range of the token being (or just) lex'd.
location current_token_position;
auto error_messages() const -> const std::vector<std::string> {
return error_messages_;
}
private:
// A path to the file processed, relative to the current working directory
// when *this is called.
Nonnull<const std::string*> input_file_name_;
bool trace_;
std::vector<std::string> error_messages_;
};
} // namespace Carbon