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Remove global_arena (#814)

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With this, only main.cpp instantiates an arena. Maybe we'll want to split that up more later (e.g., so that the runtime interpreter uses its own arena), but given the intent to have type-checking update the AST, I thought this was a reasonable approach for now in order to avoid ownership complexities.

Fixes #769
This commit is contained in:
Jon Meow
2021-09-09 11:00:57 -07:00
committed by GitHub
parent 3610325c38
commit 90f04700e2
27 changed files with 568 additions and 581 deletions
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executable_semantics/interpreter/exec_program.cpp
+19 -20
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@@ -15,30 +15,29 @@ namespace Carbon {
// Adds builtins, currently only Print(). Note Print() is experimental, not
// standardized, but is made available for printing state in tests.
static void AddIntrinsics(std::vector<Ptr<const Declaration>>* declarations) {
static void AddIntrinsics(Ptr<Arena> arena,
std::vector<Ptr<const Declaration>>* declarations) {
SourceLocation loc("<intrinsic>", 0);
std::vector<TuplePattern::Field> print_fields = {TuplePattern::Field(
"0", global_arena->New<BindingPattern>(
loc, "format_str",
global_arena->New<ExpressionPattern>(
global_arena->New<StringTypeLiteral>(loc))))};
"0",
arena->New<BindingPattern>(
loc, "format_str",
arena->New<ExpressionPattern>(arena->New<StringTypeLiteral>(loc))))};
auto print_return =
global_arena->New<Return>(loc,
global_arena->New<IntrinsicExpression>(
IntrinsicExpression::IntrinsicKind::Print),
false);
auto print = global_arena->New<FunctionDeclaration>(
global_arena->New<FunctionDefinition>(
loc, "Print", std::vector<GenericBinding>(),
global_arena->New<TuplePattern>(loc, print_fields),
global_arena->New<ExpressionPattern>(
global_arena->New<TupleLiteral>(loc)),
/*is_omitted_return_type=*/false, print_return));
arena->New<Return>(loc,
arena->New<IntrinsicExpression>(
IntrinsicExpression::IntrinsicKind::Print),
false);
auto print = arena->New<FunctionDeclaration>(arena->New<FunctionDefinition>(
loc, "Print", std::vector<GenericBinding>(),
arena->New<TuplePattern>(loc, print_fields),
arena->New<ExpressionPattern>(arena->New<TupleLiteral>(loc)),
/*is_omitted_return_type=*/false, print_return));
declarations->insert(declarations->begin(), print);
}
void ExecProgram(AST ast) {
AddIntrinsics(&ast.declarations);
void ExecProgram(Ptr<Arena> arena, AST ast) {
AddIntrinsics(arena, &ast.declarations);
if (tracing_output) {
llvm::outs() << "********** source program **********\n";
for (const auto decl : ast.declarations) {
@@ -46,7 +45,7 @@ void ExecProgram(AST ast) {
}
llvm::outs() << "********** type checking **********\n";
}
TypeChecker type_checker;
TypeChecker type_checker(arena);
TypeChecker::TypeCheckContext p = type_checker.TopLevel(ast.declarations);
TypeEnv top = p.types;
Env ct_top = p.values;
@@ -62,7 +61,7 @@ void ExecProgram(AST ast) {
}
llvm::outs() << "********** starting execution **********\n";
}
int result = Interpreter().InterpProgram(new_decls);
int result = Interpreter(arena).InterpProgram(new_decls);
llvm::outs() << "result: " << result << "\n";
}