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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/parser.ypp
+29 -7
View File
@@ -62,6 +62,7 @@
#include "common/check.h"
#include "executable_semantics/syntax/parse_and_lex_context.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/raw_ostream.h"
} // %code top
%code requires {
@@ -86,13 +87,13 @@
%code {
void Carbon::Parser::error(const location_type&, const std::string& message) {
context.PrintDiagnostic(message);
context.RecordSyntaxError(message);
}
} // %code
%token <int> integer_literal
%token <std::string> identifier
%token <std::string> intrinsic_identifier
%token <IntrinsicExpression::Intrinsic> intrinsic_identifier
%token <std::string> sized_type_literal
%token <std::string> string_literal
%type <std::string> designator
@@ -582,7 +583,16 @@ non_expression_pattern:
| paren_pattern
{ $$ = $1; }
| postfix_expression tuple_pattern
{ $$ = arena->New<AlternativePattern>(context.source_loc(), $1, $2); }
{
ErrorOr<Nonnull<AlternativePattern*>> alternative_pattern =
AlternativePattern::Create(arena, context.source_loc(), $1, $2);
if (alternative_pattern.ok()) {
$$ = *alternative_pattern;
} else {
context.RecordSyntaxError(alternative_pattern.error().message());
YYERROR;
}
}
| VAR non_expression_pattern
{ $$ = arena->New<VarPattern>(context.source_loc(), $2); }
;
@@ -804,13 +814,25 @@ receiver:
function_declaration:
FN identifier deduced_params receiver maybe_empty_tuple_pattern return_term block
{
$$ = arena->New<FunctionDeclaration>(context.source_loc(), $2, $3, $4, $5,
$6, $7);
ErrorOr<FunctionDeclaration*> fn = FunctionDeclaration::Create(
arena, context.source_loc(), $2, $3, $4, $5, $6, $7);
if (fn.ok()) {
$$ = *fn;
} else {
context.RecordSyntaxError(fn.error().message());
YYERROR;
}
}
| FN identifier deduced_params receiver maybe_empty_tuple_pattern return_term SEMICOLON
{
$$ = arena->New<FunctionDeclaration>(context.source_loc(), $2, $3, $4, $5,
$6, std::nullopt);
ErrorOr<FunctionDeclaration*> fn = FunctionDeclaration::Create(
arena, context.source_loc(), $2, $3, $4, $5, $6, std::nullopt);
if (fn.ok()) {
$$ = *fn;
} else {
context.RecordSyntaxError(fn.error().message());
YYERROR;
}
}
;
variable_declaration: identifier COLON pattern