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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/interpreter/exec_program.cpp
+7 -5
View File
@@ -13,10 +13,11 @@
#include "executable_semantics/interpreter/resolve_control_flow.h"
#include "executable_semantics/interpreter/resolve_names.h"
#include "executable_semantics/interpreter/type_checker.h"
#include "llvm/Support/Error.h"
namespace Carbon {
void ExecProgram(Nonnull<Arena*> arena, AST ast, bool trace) {
auto ExecProgram(Nonnull<Arena*> arena, AST ast, bool trace) -> ErrorOr<int> {
if (trace) {
llvm::outs() << "********** source program **********\n";
for (const auto decl : ast.declarations) {
@@ -32,15 +33,15 @@ void ExecProgram(Nonnull<Arena*> arena, AST ast, bool trace) {
if (trace) {
llvm::outs() << "********** resolving names **********\n";
}
ResolveNames(ast);
RETURN_IF_ERROR(ResolveNames(ast));
if (trace) {
llvm::outs() << "********** resolving control flow **********\n";
}
ResolveControlFlow(ast);
RETURN_IF_ERROR(ResolveControlFlow(ast));
if (trace) {
llvm::outs() << "********** type checking **********\n";
}
TypeChecker(arena, trace).TypeCheck(ast);
RETURN_IF_ERROR(TypeChecker(arena, trace).TypeCheck(ast));
if (trace) {
llvm::outs() << "\n";
llvm::outs() << "********** type checking complete **********\n";
@@ -49,8 +50,9 @@ void ExecProgram(Nonnull<Arena*> arena, AST ast, bool trace) {
}
llvm::outs() << "********** starting execution **********\n";
}
int result = InterpProgram(ast, arena, trace);
ASSIGN_OR_RETURN(const int result, InterpProgram(ast, arena, trace));
llvm::outs() << "result: " << result << "\n";
return result;
}
} // namespace Carbon