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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/ast/declaration.cpp
+20 -11
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@@ -112,29 +112,38 @@ void ReturnTerm::Print(llvm::raw_ostream& out) const {
}
}
// Look for the `me` parameter in the `deduced_parameters_`
// and put it in the `me_pattern_`.
void FunctionDeclaration::ResolveDeducedAndReceiver(
const std::vector<Nonnull<AstNode*>>& deduced_params) {
auto FunctionDeclaration::Create(
Nonnull<Arena*> arena, SourceLocation source_loc, std::string name,
std::vector<Nonnull<AstNode*>> deduced_params,
std::optional<Nonnull<BindingPattern*>> me_pattern,
Nonnull<TuplePattern*> param_pattern, ReturnTerm return_term,
std::optional<Nonnull<Block*>> body)
-> ErrorOr<Nonnull<FunctionDeclaration*>> {
std::vector<Nonnull<GenericBinding*>> resolved_params;
// Look for the `me` parameter in the `deduced_parameters`
// and put it in the `me_pattern`.
for (Nonnull<AstNode*> param : deduced_params) {
switch (param->kind()) {
case AstNodeKind::GenericBinding:
deduced_parameters_.push_back(&cast<GenericBinding>(*param));
resolved_params.push_back(&cast<GenericBinding>(*param));
break;
case AstNodeKind::BindingPattern: {
Nonnull<BindingPattern*> bp = &cast<BindingPattern>(*param);
if (me_pattern_.has_value() || bp->name() != "me") {
FATAL_COMPILATION_ERROR(source_loc())
<< "illegal binding pattern in implicit parameter list";
if (me_pattern.has_value() || bp->name() != "me") {
return FATAL_COMPILATION_ERROR(source_loc)
<< "illegal binding pattern in implicit parameter list";
}
me_pattern_ = bp;
me_pattern = bp;
break;
}
default:
FATAL_COMPILATION_ERROR(source_loc())
<< "illegal AST node in implicit parameter list";
return FATAL_COMPILATION_ERROR(source_loc)
<< "illegal AST node in implicit parameter list";
}
}
return arena->New<FunctionDeclaration>(source_loc, name, resolved_params,
me_pattern, param_pattern, return_term,
body);
}
void FunctionDeclaration::PrintDepth(int depth, llvm::raw_ostream& out) const {