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Type check the return statement

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This commit is contained in:
Eugen Wissner 2025-03-25 11:29:29 +01:00
parent c022805c53
commit d359056354
Signed by: belka
GPG Key ID: A27FDC1E8EE902C0
13 changed files with 483 additions and 477 deletions
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191
boot/ast.cc
View File

@ -33,14 +33,6 @@ namespace elna::boot
return this->source_position;
}
statement::statement()
{
}
statement::~statement()
{
}
assign_statement *statement::is_assign()
{
return nullptr;
@ -71,14 +63,6 @@ namespace elna::boot
return nullptr;
}
expression::expression()
{
}
expression::~expression()
{
}
cast_expression *expression::is_cast()
{
return nullptr;
@ -114,39 +98,6 @@ namespace elna::boot
return nullptr;
}
void expression::accept(parser_visitor *visitor)
{
if (cast_expression *node = is_cast())
{
return node->accept(visitor);
}
else if (traits_expression *node = is_traits())
{
return node->accept(visitor);
}
else if (binary_expression *node = is_binary())
{
return node->accept(visitor);
}
else if (unary_expression *node = is_unary())
{
return node->accept(visitor);
}
else if (designator_expression *node = is_designator())
{
return node->accept(visitor);
}
else if (procedure_call *node = is_call_expression())
{
return node->accept(visitor);
}
else if (literal_expression *node = is_literal())
{
return node->accept(visitor);
}
__builtin_unreachable();
}
type_expression::type_expression(const struct position position)
: node(position)
{
@ -182,35 +133,6 @@ namespace elna::boot
return nullptr;
}
void type_expression::accept(parser_visitor *visitor)
{
if (std::shared_ptr<primitive_type_expression> node = is_primitive())
{
return node->accept(visitor);
}
else if (std::shared_ptr<array_type_expression> node = is_array())
{
return node->accept(visitor);
}
else if (std::shared_ptr<pointer_type_expression> node = is_pointer())
{
return node->accept(visitor);
}
else if (std::shared_ptr<record_type_expression> node = is_record())
{
return node->accept(visitor);
}
else if (std::shared_ptr<union_type_expression> node = is_union())
{
return node->accept(visitor);
}
else if (std::shared_ptr<procedure_type_expression> node = is_procedure())
{
return node->accept(visitor);
}
__builtin_unreachable();
}
primitive_type_expression::primitive_type_expression(const struct position position, const std::string& name)
: type_expression(position), name(name)
{
@ -301,8 +223,8 @@ namespace elna::boot
}
variable_declaration::variable_declaration(const struct position position, const std::string& identifier,
std::shared_ptr<type_expression> type, const bool exported)
: definition(position, identifier, exported), m_type(type)
std::shared_ptr<type_expression> variable_type, const bool exported)
: definition(position, identifier, exported), m_variable_type(variable_type)
{
}
@ -313,7 +235,7 @@ namespace elna::boot
type_expression& variable_declaration::variable_type()
{
return *m_type;
return *m_variable_type;
}
definition::definition(const struct position position, const std::string& identifier, const bool exported)
@ -462,47 +384,16 @@ namespace elna::boot
return this;
}
void literal_expression::accept(parser_visitor *visitor)
{
if (literal<std::int32_t> *node = is_int())
{
return node->accept(visitor);
}
else if (literal<std::uint32_t> *node = is_word())
{
return node->accept(visitor);
}
else if (literal<double> *node = is_float())
{
return node->accept(visitor);
}
else if (literal<bool> *node = is_bool())
{
return node->accept(visitor);
}
else if (literal<unsigned char> *node = is_char())
{
return node->accept(visitor);
}
else if (literal<std::nullptr_t> *node = is_nil())
{
return node->accept(visitor);
}
else if (literal<std::string> *node = is_string())
{
return node->accept(visitor);
}
else
{
__builtin_unreachable();
}
}
defer_statement::defer_statement(const struct position position)
: node(position)
{
}
void defer_statement::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
defer_statement *defer_statement::is_defer()
{
return this;
@ -529,11 +420,37 @@ namespace elna::boot
return this;
}
void designator_expression::accept(parser_visitor *visitor)
{
if (variable_expression *node = is_variable())
{
return visitor->visit(node);
}
else if (array_access_expression *node = is_array_access())
{
return visitor->visit(node);
}
else if (field_access_expression *node = is_field_access())
{
return visitor->visit(node);
}
else if (dereference_expression *node = is_dereference())
{
return visitor->visit(node);
}
__builtin_unreachable();
}
variable_expression::variable_expression(const struct position position, const std::string& name)
: node(position), name(name)
{
}
void variable_expression::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
variable_expression *variable_expression::is_variable()
{
return this;
@ -545,6 +462,11 @@ namespace elna::boot
{
}
void array_access_expression::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
expression& array_access_expression::index()
{
return *m_index;
@ -572,6 +494,11 @@ namespace elna::boot
{
}
void field_access_expression::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
expression& field_access_expression::base()
{
return *m_base;
@ -598,6 +525,11 @@ namespace elna::boot
{
}
void dereference_expression::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
expression& dereference_expression::base()
{
return *m_base;
@ -686,6 +618,11 @@ namespace elna::boot
{
}
void procedure_call::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
procedure_call *procedure_call::is_call_statement()
{
return this;
@ -780,6 +717,11 @@ namespace elna::boot
{
}
void return_statement::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
return_statement *return_statement::is_return()
{
return this;
@ -801,6 +743,11 @@ namespace elna::boot
{
}
void assign_statement::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
assign_statement *assign_statement::is_assign()
{
return this;
@ -847,6 +794,11 @@ namespace elna::boot
{
}
void if_statement::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
if_statement *if_statement::is_if()
{
return this;
@ -877,6 +829,11 @@ namespace elna::boot
{
}
void while_statement::accept(parser_visitor *visitor)
{
visitor->visit(this);
}
while_statement *while_statement::is_while()
{
return this;

20
boot/parser.yy
View File

@ -286,10 +286,15 @@ if_statement:
$$ = new boot::if_statement(boot::make_position(@1), then, _else);
std::swap($5, $$->branches);
}
return_statement: "return" expression
return_statement:
"return" expression
{
$$ = new boot::return_statement(boot::make_position(@1), $2);
}
| "return"
{
$$ = new boot::return_statement(boot::make_position(@1));
}
defer_statement: DEFER statements "end"
{
$$ = new boot::defer_statement(boot::make_position(@1));
@ -472,9 +477,9 @@ statements:
field_declaration:
IDENTIFIER ":" type_expression { $$ = std::make_pair($1, $3); }
required_fields:
field_declaration required_fields
field_declaration ";" required_fields
{
std::swap($$, $2);
std::swap($$, $3);
$$.emplace($$.cbegin(), $1);
}
| field_declaration { $$.emplace_back($1); }
@ -534,14 +539,14 @@ constant_definition: identifier_definition "=" literal
$$ = new boot::constant_definition(boot::make_position(@1), $1.first, $1.second, $3);
}
constant_definitions:
constant_definition constant_definitions
constant_definition ";" constant_definitions
{
std::swap($$, $2);
std::swap($$, $3);
$$.insert($$.cbegin(), $1);
}
| /* no constant definitions */ {}
constant_part:
{}
/* no constant definitions */ {}
| "const" constant_definitions { std::swap($$, $2); }
type_definition: identifier_definition "=" type_expression
{
@ -553,10 +558,9 @@ type_definitions:
std::swap($$, $2);
$$.insert($$.cbegin(), $1);
}
| type_definition { $$.push_back($1); }
| /* no type definitions */ {}
type_part:
/* no type definitions */ {}
| "type" {}
| "type" type_definitions { std::swap($$, $2); }
formal_parameter: IDENTIFIER ":" type_expression
{

179
boot/semantic.cc
View File

@ -65,6 +65,18 @@ namespace elna::boot
auto info = std::make_shared<type_info>(type_info(type(unresolved.second)));
this->symbols->enter(std::move(unresolved.first), info);
}
for (variable_declaration *const variable : program->variables)
{
variable->accept(this);
}
for (procedure_definition *const procedure : program->procedures)
{
procedure->accept(this);
}
for (statement *const statement : program->body)
{
statement->accept(this);
}
}
void declaration_visitor::visit(type_definition *definition)
@ -106,142 +118,219 @@ namespace elna::boot
this->current_type = type(std::make_shared<array_type>(this->current_type, type_expression->size));
}
void declaration_visitor::visit(record_type_expression *)
void declaration_visitor::visit(record_type_expression *type_expression)
{
this->current_type = type(std::make_shared<record_type>());
auto result_type = std::make_shared<record_type>();
for (auto& field : type_expression->fields)
{
field.second->accept(this);
result_type->fields.push_back(std::make_pair(field.first, this->current_type));
}
this->current_type = type(result_type);
}
void declaration_visitor::visit(union_type_expression *)
void declaration_visitor::visit(union_type_expression *type_expression)
{
this->current_type = type(std::make_shared<union_type>());
auto result_type = std::make_shared<union_type>();
for (auto& field : type_expression->fields)
{
field.second->accept(this);
result_type->fields.push_back(std::make_pair(field.first, this->current_type));
}
this->current_type = type(result_type);
}
void declaration_visitor::visit(procedure_type_expression *)
{
}
void declaration_visitor::visit(variable_declaration *)
void declaration_visitor::visit(variable_declaration *declaration)
{
__builtin_unreachable();
declaration->variable_type().accept(this);
}
void declaration_visitor::visit(constant_definition *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(procedure_definition *)
void declaration_visitor::visit(procedure_definition *definition)
{
__builtin_unreachable();
for (auto heading_parameter : definition->heading().parameters)
{
heading_parameter->accept(this);
}
if (definition->heading().return_type.type != nullptr)
{
definition->heading().return_type.type->accept(this);
}
if (definition->body != nullptr)
{
definition->body->accept(this);
}
}
void declaration_visitor::visit(assign_statement *)
void declaration_visitor::visit(assign_statement *statement)
{
__builtin_unreachable();
statement->lvalue().accept(this);
statement->rvalue().accept(this);
}
void declaration_visitor::visit(if_statement *)
void declaration_visitor::visit(if_statement *statement)
{
__builtin_unreachable();
statement->body().prerequisite().accept(this);
for (struct statement *const statement : statement->body().statements)
{
statement->accept(this);
}
for (const auto branch : statement->branches)
{
branch->prerequisite().accept(this);
for (struct statement *const statement : branch->statements)
{
statement->accept(this);
}
}
if (statement->alternative() != nullptr)
{
for (struct statement *const statement : *statement->alternative())
{
statement->accept(this);
}
}
}
void declaration_visitor::visit(while_statement *)
void declaration_visitor::visit(while_statement *statement)
{
__builtin_unreachable();
statement->body().prerequisite().accept(this);
for (struct statement *const statement : statement->body().statements)
{
statement->accept(this);
}
for (const auto branch : statement->branches)
{
branch->prerequisite().accept(this);
for (struct statement *const statement : branch->statements)
{
statement->accept(this);
}
}
}
void declaration_visitor::visit(return_statement *)
void declaration_visitor::visit(return_statement *statement)
{
__builtin_unreachable();
if (statement->return_expression() != nullptr)
{
statement->return_expression()->accept(this);
}
}
void declaration_visitor::visit(defer_statement *)
void declaration_visitor::visit(defer_statement *statement)
{
__builtin_unreachable();
for (struct statement *const statement : statement->statements)
{
statement->accept(this);
}
}
void declaration_visitor::visit(procedure_call *)
void declaration_visitor::visit(procedure_call *call)
{
__builtin_unreachable();
call->callable().accept(this);
for (expression *const argument: call->arguments)
{
argument->accept(this);
}
}
void declaration_visitor::visit(block *)
void declaration_visitor::visit(block *block)
{
__builtin_unreachable();
for (constant_definition *const constant : block->constants)
{
constant->accept(this);
}
for (variable_declaration *const variable : block->variables)
{
variable->accept(this);
}
for (statement *const statement : block->body)
{
statement->accept(this);
}
}
void declaration_visitor::visit(traits_expression *)
void declaration_visitor::visit(traits_expression *trait)
{
__builtin_unreachable();
if (!trait->parameters.empty())
{
trait->parameters.front()->accept(this);
}
}
void declaration_visitor::visit(cast_expression *)
void declaration_visitor::visit(cast_expression *expression)
{
__builtin_unreachable();
expression->value().accept(this);
expression->target().accept(this);
}
void declaration_visitor::visit(binary_expression *)
void declaration_visitor::visit(binary_expression *expression)
{
__builtin_unreachable();
expression->lhs().accept(this);
expression->rhs().accept(this);
}
void declaration_visitor::visit(unary_expression *)
void declaration_visitor::visit(unary_expression *expression)
{
__builtin_unreachable();
expression->operand().accept(this);
}
void declaration_visitor::visit(variable_expression *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(array_access_expression *)
void declaration_visitor::visit(array_access_expression *expression)
{
__builtin_unreachable();
expression->base().accept(this);
expression->index().accept(this);
}
void declaration_visitor::visit(field_access_expression *)
void declaration_visitor::visit(field_access_expression *expression)
{
__builtin_unreachable();
expression->base().accept(this);
}
void declaration_visitor::visit(dereference_expression *)
void declaration_visitor::visit(dereference_expression *expression)
{
__builtin_unreachable();
expression->base().accept(this);
}
void declaration_visitor::visit(literal<std::int32_t> *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(literal<std::uint32_t> *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(literal<double> *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(literal<bool> *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(literal<unsigned char> *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(literal<std::nullptr_t> *)
{
__builtin_unreachable();
}
void declaration_visitor::visit(literal<std::string> *)
{
__builtin_unreachable();
}
}

26
gcc/elna-builtins.cc
View File

@ -49,17 +49,29 @@ namespace elna::gcc
layout_type(elna_string_type_node);
}
static
void declare_builtin_type(std::shared_ptr<symbol_table> symbol_table, const char *name, tree type)
{
tree identifier = get_identifier(name);
tree type_declaration = build_decl(UNKNOWN_LOCATION, TYPE_DECL, identifier, type);
TREE_PUBLIC(type_declaration) = 1;
TYPE_NAME(type_declaration) = identifier;
symbol_table->enter(name, type_declaration);
}
std::shared_ptr<symbol_table> builtin_symbol_table()
{
std::shared_ptr<elna::gcc::symbol_table> symbol_table = std::make_shared<elna::gcc::symbol_table>();
symbol_table->enter("Int", elna_int_type_node);
symbol_table->enter("Word", elna_word_type_node);
symbol_table->enter("Char", elna_char_type_node);
symbol_table->enter("Bool", elna_bool_type_node);
symbol_table->enter("Byte", elna_byte_type_node);
symbol_table->enter("Float", elna_float_type_node);
symbol_table->enter("String", elna_string_type_node);
declare_builtin_type(symbol_table, "Int", elna_int_type_node);
declare_builtin_type(symbol_table, "Word", elna_word_type_node);
declare_builtin_type(symbol_table, "Char", elna_char_type_node);
declare_builtin_type(symbol_table, "Bool", elna_bool_type_node);
declare_builtin_type(symbol_table, "Byte", elna_byte_type_node);
declare_builtin_type(symbol_table, "Float", elna_float_type_node);
declare_builtin_type(symbol_table, "String", elna_string_type_node);
return symbol_table;
}

122
gcc/elna-generic.cc
View File

@ -36,11 +36,20 @@ along with GCC; see the file COPYING3. If not see
namespace elna::gcc
{
tree get_inner_alias(const boot::type& type, std::shared_ptr<symbol_table> symbols)
tree get_inner_alias(const boot::type& type, std::shared_ptr<symbol_table> symbols,
std::unordered_map<std::string, tree>& unresolved)
{
if (auto reference = type.get<boot::primitive_type>())
{
return symbols->lookup(reference->identifier);
auto looked_up = unresolved.find(reference->identifier);
if (looked_up == unresolved.cend())
{
return symbols->lookup(reference->identifier);
}
else
{
return looked_up->second;
}
}
else if (auto reference = type.get<boot::record_type>())
{
@ -52,7 +61,7 @@ namespace elna::gcc
}
else if (auto reference = type.get<boot::pointer_type>())
{
return build_pointer_type_for_mode(get_inner_alias(reference->base, symbols), VOIDmode, true);
return build_global_pointer_type(get_inner_alias(reference->base, symbols, unresolved));
}
else if (auto reference = type.get<boot::array_type>())
{
@ -60,30 +69,31 @@ namespace elna::gcc
tree upper_bound = build_int_cst_type(integer_type_node, reference->size);
tree range_type = build_range_type(integer_type_node, lower_bound, upper_bound);
return build_array_type(get_inner_alias(reference->base, symbols), range_type);
return build_array_type(get_inner_alias(reference->base, symbols, unresolved), range_type);
}
else if (auto reference = type.get<boot::alias_type>())
{
return handle_symbol(reference->name, reference->reference, symbols);
return handle_symbol(reference->name, reference->reference, symbols, unresolved);
}
return error_mark_node;
}
tree handle_symbol(const std::string& symbol_name, const boot::type& type, std::shared_ptr<symbol_table> symbols)
tree handle_symbol(const std::string& symbol_name, const boot::type& type,
std::shared_ptr<symbol_table> symbols, std::unordered_map<std::string, tree>& unresolved)
{
auto looked_up = symbols->lookup(symbol_name);
if (looked_up == NULL_TREE)
{
looked_up = get_inner_alias(type, symbols);
symbols->enter(symbol_name, looked_up);
looked_up = get_inner_alias(type, symbols, unresolved);
unresolved.insert({ symbol_name, looked_up });
}
return looked_up;
}
std::deque<std::unique_ptr<boot::error>> do_semantic_analysis(const char *path,
std::unique_ptr<boot::program>& ast, std::shared_ptr<boot::symbol_table> info_table,
std::shared_ptr<symbol_table> symbols)
std::shared_ptr<symbol_table> symbols, std::unordered_map<std::string, tree>& unresolved)
{
boot::declaration_visitor declaration_visitor(path, info_table);
@ -93,15 +103,16 @@ namespace elna::gcc
{
for (auto& [symbol_name, symbol_info] : declaration_visitor.unresolved)
{
handle_symbol(symbol_name, boot::type(symbol_info), symbols);
handle_symbol(symbol_name, boot::type(symbol_info), symbols, unresolved);
}
}
return std::move(declaration_visitor.errors());
}
generic_visitor::generic_visitor(std::shared_ptr<symbol_table> symbol_table)
generic_visitor::generic_visitor(std::shared_ptr<symbol_table> symbol_table,
std::unordered_map<std::string, tree>&& unresolved)
: symbols(symbol_table), unresolved(std::move(unresolved))
{
this->symbols = symbol_table;
}
void generic_visitor::build_procedure_call(location_t call_location,
@ -201,14 +212,14 @@ namespace elna::gcc
? this->current_expression
: TREE_TYPE(this->current_expression);
if (TYPE_P(this->current_expression) && TREE_CODE(expression_type) == RECORD_TYPE)
if (TREE_CODE(expression_type) == RECORD_TYPE)
{
build_record_call(call_location, this->current_expression, call->arguments);
build_record_call(call_location, expression_type, call->arguments);
}
else if (TREE_CODE(expression_type) == FUNCTION_TYPE)
{
this->current_expression = build1(ADDR_EXPR,
build_pointer_type_for_mode(expression_type, VOIDmode, true), this->current_expression);
build_global_pointer_type(expression_type), this->current_expression);
build_procedure_call(call_location, this->current_expression, call->arguments);
}
else if (is_pointer_type(expression_type) && TREE_CODE(TREE_TYPE(expression_type)) == FUNCTION_TYPE)
@ -263,8 +274,8 @@ namespace elna::gcc
{
procedure->accept(this);
}
tree declaration_type = build_function_type_list(integer_type_node, integer_type_node,
build_pointer_type(build_pointer_type(char_type_node)), NULL_TREE);
tree declaration_type = build_function_type_list(integer_type_node, elna_int_type_node,
build_global_pointer_type(build_global_pointer_type(elna_char_type_node)), NULL_TREE);
tree fndecl = build_fn_decl("main", declaration_type);
tree resdecl = build_decl(UNKNOWN_LOCATION, RESULT_DECL, NULL_TREE, integer_type_node);
@ -702,7 +713,7 @@ namespace elna::gcc
TREE_ADDRESSABLE(this->current_expression) = 1;
this->current_expression = build_fold_addr_expr_with_type_loc(location,
this->current_expression,
build_pointer_type_for_mode(TREE_TYPE(this->current_expression), VOIDmode, true));
build_global_pointer_type(TREE_TYPE(this->current_expression)));
TREE_NO_TRAMPOLINE(this->current_expression) = 1;
break;
case boot::unary_operator::negation:
@ -763,8 +774,7 @@ namespace elna::gcc
}
else
{
error_at(definition_location,
"variable '%s' already declared in this scope",
error_at(definition_location, "Variable '%s' already declared in this scope",
definition->identifier.c_str());
}
this->current_expression = NULL_TREE;
@ -773,15 +783,18 @@ namespace elna::gcc
void generic_visitor::visit(boot::type_definition *definition)
{
location_t definition_location = get_location(&definition->position());
this->current_expression = this->symbols->lookup(definition->identifier);
this->current_expression = this->unresolved.at(definition->identifier);
definition->body().accept(this);
tree definition_tree = build_decl(definition_location, TYPE_DECL,
get_identifier(definition->identifier.c_str()), this->current_expression);
auto result = this->symbols->enter(definition->identifier, this->current_expression);
TREE_PUBLIC(definition_tree) = definition->exported;
TYPE_NAME(this->current_expression) = get_identifier(definition->identifier.c_str());
auto result = this->symbols->enter(definition->identifier, definition_tree);
gcc_assert(result);
this->current_expression = NULL_TREE;
}
@ -878,8 +891,7 @@ namespace elna::gcc
if (symbol == NULL_TREE)
{
error_at(get_location(&expression->position()),
"symbol '%s' not declared in the current scope",
error_at(get_location(&expression->position()), "Symbol '%s' not declared in the current scope",
expression->name.c_str());
this->current_expression = error_mark_node;
}
@ -1051,7 +1063,7 @@ namespace elna::gcc
}
else if (is_array_type(aggregate_type) && expression->field() == "ptr")
{
tree ptr_type = build_pointer_type_for_mode(TREE_TYPE(aggregate_type), VOIDmode, true);
tree ptr_type = build_global_pointer_type(TREE_TYPE(aggregate_type));
this->current_expression = build1(ADDR_EXPR,
build_qualified_type(ptr_type, TYPE_QUAL_CONST), this->current_expression);
}
@ -1225,29 +1237,65 @@ namespace elna::gcc
void generic_visitor::visit(boot::return_statement *statement)
{
boot::expression *return_expression = statement->return_expression();
location_t statement_position = get_location(&statement->position());
tree set_result{ NULL_TREE };
tree return_type = TREE_TYPE(TREE_TYPE(current_function_decl));
if (return_expression == nullptr)
if (TREE_THIS_VOLATILE(current_function_decl) == 1)
{
error_at(statement_position, "This procedure is not allowed to return");
return;
}
return_expression->accept(this);
tree set_result = build2(INIT_EXPR, void_type_node, DECL_RESULT(current_function_decl),
this->current_expression);
tree return_stmt = build1(RETURN_EXPR, void_type_node, set_result);
append_statement(return_stmt);
if (return_expression != nullptr)
{
return_expression->accept(this);
set_result = build2(INIT_EXPR, void_type_node, DECL_RESULT(current_function_decl),
this->current_expression);
}
if (return_type == void_type_node && set_result != NULL_TREE)
{
error_at(statement_position, "Proper procedure is not allowed to return a value");
}
else if (return_type != void_type_node && set_result == NULL_TREE)
{
error_at(statement_position, "Procedure is expected to return a value of type '%s'",
print_type(return_type).c_str());
}
else if (return_type != void_type_node && !is_assignable_from(return_type, this->current_expression))
{
error_at(statement_position, "Cannot return '%s' from a procedure returning '%s'",
print_type(return_type).c_str(),
print_type(TREE_TYPE(this->current_expression)).c_str());
}
else
{
tree return_stmt = build1_loc(statement_position, RETURN_EXPR, void_type_node, set_result);
append_statement(return_stmt);
}
this->current_expression = NULL_TREE;
}
void generic_visitor::visit(boot::primitive_type_expression *type)
{
tree symbol = this->symbols->lookup(type->name);
auto looked_up = this->unresolved.find(type->name);
tree symbol;
if (looked_up == this->unresolved.cend())
{
symbol = this->symbols->lookup(type->name);
if (symbol != NULL_TREE)
{
symbol = TREE_TYPE(symbol);
}
}
else
{
symbol = looked_up->second;
}
if (symbol == NULL_TREE || !TYPE_P(symbol))
{
error_at(get_location(&type->position()),
"type '%s' not declared", type->name.c_str());
error_at(get_location(&type->position()), "Type '%s' not declared", type->name.c_str());
this->current_expression = error_mark_node;
}
@ -1277,7 +1325,7 @@ namespace elna::gcc
if (this->current_expression != NULL_TREE && this->current_expression != error_mark_node)
{
this->current_expression = build_pointer_type_for_mode(this->current_expression, VOIDmode, true);
this->current_expression = build_global_pointer_type(this->current_expression);
}
}
@ -1302,7 +1350,7 @@ namespace elna::gcc
void generic_visitor::visit(boot::procedure_type_expression *type)
{
tree procedure_type_node = build_procedure_type(*type);
this->current_expression = build_pointer_type_for_mode(procedure_type_node, VOIDmode, true);
this->current_expression = build_global_pointer_type(procedure_type_node);
}
void generic_visitor::visit(boot::defer_statement *statement)

5
gcc/elna-tree.cc
View File

@ -248,4 +248,9 @@ namespace elna::gcc
}
return field_declaration;
}
tree build_global_pointer_type(tree type)
{
return build_pointer_type_for_mode(type, VOIDmode, true);
}
}

6
gcc/elna1.cc
View File

@ -85,12 +85,14 @@ static void elna_parse_file(const char *filename)
{
std::shared_ptr<elna::boot::symbol_table> info_table = elna::boot::builtin_symbol_table();
std::shared_ptr<elna::gcc::symbol_table> symbol_table = elna::gcc::builtin_symbol_table();
std::unordered_map<std::string, tree> unresolved;
auto semantic_errors = elna::gcc::do_semantic_analysis(filename, driver.tree, info_table, symbol_table);
auto semantic_errors = elna::gcc::do_semantic_analysis(filename, driver.tree,
info_table, symbol_table, unresolved);
if (semantic_errors.empty())
{
elna::gcc::generic_visitor generic_visitor{ symbol_table };
elna::gcc::generic_visitor generic_visitor{ symbol_table, std::move(unresolved) };
generic_visitor.visit(driver.tree.get());
}
else

199
include/elna/boot/ast.h
View File

@ -138,6 +138,7 @@ namespace elna::boot
explicit node(const position position);
public:
virtual void accept(parser_visitor *visitor) = 0;
virtual ~node() = 0;
/**
@ -155,41 +156,6 @@ namespace elna::boot
virtual return_statement *is_return();
virtual defer_statement *is_defer();
virtual procedure_call *is_call_statement();
template<typename V>
void accept(V *visitor)
{
if (assign_statement *node = is_assign())
{
return visitor->visit(node);
}
else if (if_statement *node = is_if())
{
return visitor->visit(node);
}
else if (while_statement *node = is_while())
{
return visitor->visit(node);
}
else if (return_statement *node = is_return())
{
return visitor->visit(node);
}
else if (defer_statement *node = is_defer())
{
return visitor->visit(node);
}
else if (procedure_call *node = is_call_statement())
{
return visitor->visit(node);
}
__builtin_unreachable();
}
~statement() = 0;
protected:
statement();
};
class expression : public virtual node
@ -202,12 +168,6 @@ namespace elna::boot
virtual designator_expression *is_designator();
virtual procedure_call *is_call_expression();
virtual literal_expression *is_literal();
void accept(parser_visitor *visitor);
~expression() = 0;
protected:
expression();
};
/**
@ -236,8 +196,6 @@ namespace elna::boot
virtual std::shared_ptr<union_type_expression> is_union();
virtual std::shared_ptr<procedure_type_expression> is_procedure();
void accept(parser_visitor *visitor);
protected:
type_expression(const struct position position);
};
@ -251,7 +209,7 @@ namespace elna::boot
const std::string name;
primitive_type_expression(const struct position position, const std::string& name);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
std::shared_ptr<primitive_type_expression> is_primitive() override;
};
@ -264,7 +222,7 @@ namespace elna::boot
array_type_expression(const struct position position,
std::shared_ptr<type_expression> base, const std::uint32_t size);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
std::shared_ptr<array_type_expression> is_array() override;
type_expression& base();
@ -276,7 +234,7 @@ namespace elna::boot
public:
pointer_type_expression(const struct position position, std::shared_ptr<type_expression> base);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
std::shared_ptr<pointer_type_expression> is_pointer() override;
type_expression& base();
@ -291,7 +249,7 @@ namespace elna::boot
record_type_expression(const struct position position, std::vector<field_declaration>&& fields);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
std::shared_ptr<record_type_expression> is_record() override;
};
@ -302,7 +260,7 @@ namespace elna::boot
union_type_expression(const struct position position, std::vector<field_declaration>&& fields);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
std::shared_ptr<union_type_expression> is_union() override;
};
@ -311,12 +269,12 @@ namespace elna::boot
*/
class variable_declaration : public definition
{
std::shared_ptr<type_expression> m_type;
std::shared_ptr<type_expression> m_variable_type;
public:
variable_declaration(const struct position position, const std::string& identifier,
std::shared_ptr<type_expression> type, const bool exported = false);
void accept(parser_visitor *visitor);
std::shared_ptr<type_expression> variable_type, const bool exported = false);
void accept(parser_visitor *visitor) override;
type_expression& variable_type();
};
@ -336,7 +294,6 @@ namespace elna::boot
virtual literal<std::string> *is_string() = 0;
literal_expression *is_literal() override;
void accept(parser_visitor *visitor);
protected:
literal_expression();
@ -350,14 +307,9 @@ namespace elna::boot
literal_expression *m_body;
public:
/**
* \param position Source code position.
* \param identifier Constant name.
* \param body Constant value.
*/
constant_definition(const struct position position, const std::string& identifier,
const bool exported, literal_expression *body);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
literal_expression& body();
@ -389,7 +341,7 @@ namespace elna::boot
procedure_type_expression(const struct position position,
return_declaration return_type = return_declaration());
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
std::shared_ptr<procedure_type_expression> is_procedure() override;
};
@ -406,7 +358,7 @@ namespace elna::boot
procedure_definition(const struct position position, const std::string& identifier,
const bool exported, std::shared_ptr<procedure_type_expression> heading, block *body = nullptr);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
procedure_type_expression& heading();
@ -423,7 +375,7 @@ namespace elna::boot
public:
type_definition(const struct position position, const std::string& identifier,
const bool exported, std::shared_ptr<type_expression> expression);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
type_expression& body();
};
@ -438,7 +390,7 @@ namespace elna::boot
public:
cast_expression(const struct position position, std::shared_ptr<type_expression> target, expression *value);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
cast_expression *is_cast() override;
type_expression& target();
@ -454,7 +406,7 @@ namespace elna::boot
const std::string name;
traits_expression(const struct position position, const std::string& name);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
traits_expression *is_traits() override;
};
@ -480,17 +432,12 @@ namespace elna::boot
expression *m_return_expression{ nullptr };
public:
return_statement(const struct position position, expression *return_expression);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
return_statement(const struct position position, expression *return_expression = nullptr);
void accept(parser_visitor *visitor) override;
virtual return_statement *is_return() override;
expression *return_expression();
virtual return_statement *is_return() override;
virtual ~return_statement() override;
};
@ -502,29 +449,8 @@ namespace elna::boot
virtual field_access_expression *is_field_access();
virtual dereference_expression *is_dereference();
template<typename V>
void accept(V *visitor)
{
if (variable_expression *node = is_variable())
{
return visitor->visit(node);
}
else if (array_access_expression *node = is_array_access())
{
return visitor->visit(node);
}
else if (field_access_expression *node = is_field_access())
{
return visitor->visit(node);
}
else if (dereference_expression *node = is_dereference())
{
return visitor->visit(node);
}
__builtin_unreachable();
}
designator_expression *is_designator() override;
void accept(parser_visitor *visitor);
~designator_expression() = 0;
protected:
@ -537,12 +463,7 @@ namespace elna::boot
const std::string name;
variable_expression(const struct position position, const std::string& name);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
variable_expression *is_variable() override;
};
@ -554,12 +475,7 @@ namespace elna::boot
public:
array_access_expression(const struct position position, expression *base, expression *index);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
expression& base();
expression& index();
@ -577,12 +493,7 @@ namespace elna::boot
public:
field_access_expression(const struct position position, expression *base,
const std::string& field);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
expression& base();
std::string& field();
@ -598,16 +509,12 @@ namespace elna::boot
public:
dereference_expression(const struct position position, expression *base);
template<typename V>
void accept(parser_visitor *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
expression& base();
dereference_expression *is_dereference() override;
~dereference_expression() override;
};
@ -622,17 +529,12 @@ namespace elna::boot
std::vector<expression *> arguments;
procedure_call(const struct position position, designator_expression *callable);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
virtual procedure_call *is_call_statement() override;
virtual procedure_call *is_call_expression() override;
designator_expression& callable();
virtual procedure_call *is_call_statement() override;
virtual procedure_call *is_call_expression() override;
virtual ~procedure_call() override;
};
@ -649,18 +551,13 @@ namespace elna::boot
*/
assign_statement(const struct position position, designator_expression *lvalue,
expression *rvalue);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
designator_expression& lvalue();
expression& rvalue();
assign_statement *is_assign() override;
virtual ~assign_statement() override;
assign_statement *is_assign() override;
};
/**
@ -676,17 +573,12 @@ namespace elna::boot
if_statement(const struct position position, conditional_statements *body,
std::vector<statement *> *alternative = nullptr);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
virtual if_statement *is_if() override;
conditional_statements& body();
std::vector<statement *> *alternative();
virtual if_statement *is_if() override;
virtual ~if_statement() override;
};
@ -700,16 +592,11 @@ namespace elna::boot
public:
std::vector<conditional_statements *> branches;
while_statement(const struct position position, conditional_statements *body);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
while_statement *is_while() override;
conditional_statements& body();
while_statement *is_while() override;
virtual ~while_statement() override;
};
@ -721,7 +608,7 @@ namespace elna::boot
std::vector<statement *> body;
block(const struct position position);
void accept(parser_visitor *visitor);
virtual void accept(parser_visitor *visitor) override;
virtual ~block() override;
};
@ -733,7 +620,7 @@ namespace elna::boot
std::vector<procedure_definition *> procedures;
program(const struct position position);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
virtual ~program() override;
};
@ -833,8 +720,7 @@ namespace elna::boot
}
}
template<typename V>
void accept(V *visitor)
void accept(parser_visitor *visitor) override
{
visitor->visit(this);
}
@ -846,14 +732,9 @@ namespace elna::boot
std::vector<statement *> statements;
defer_statement(const struct position position);
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}
void accept(parser_visitor *visitor) override;
defer_statement *is_defer() override;
virtual ~defer_statement() override;
};
@ -867,7 +748,7 @@ namespace elna::boot
binary_expression(const struct position position, expression *lhs,
expression *rhs, const binary_operator operation);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
binary_expression *is_binary() override;
expression& lhs();
@ -886,7 +767,7 @@ namespace elna::boot
unary_expression(const struct position position, expression *operand,
const unary_operator operation);
void accept(parser_visitor *visitor);
void accept(parser_visitor *visitor) override;
unary_expression *is_unary() override;
expression& operand();

36
include/elna/boot/semantic.h
View File

@ -61,28 +61,28 @@ namespace elna::boot
void visit(pointer_type_expression *type_expression) override;
void visit(program *program) override;
void visit(type_definition *definition) override;
void visit(record_type_expression *) override;
void visit(union_type_expression *) override;
void visit(record_type_expression *type_expression) override;
void visit(union_type_expression *type_expression) override;
void visit(procedure_type_expression *) override;
void visit(variable_declaration *) override;
void visit(variable_declaration *declaration) override;
void visit(constant_definition *) override;
void visit(procedure_definition *) override;
void visit(assign_statement *) override;
void visit(if_statement *) override;
void visit(while_statement *) override;
void visit(return_statement *) override;
void visit(defer_statement *) override;
void visit(procedure_call *) override;
void visit(block *) override;
void visit(cast_expression *) override;
void visit(traits_expression *) override;
void visit(binary_expression *) override;
void visit(unary_expression *) override;
void visit(procedure_definition *definition) override;
void visit(assign_statement *statement) override;
void visit(if_statement *statement) override;
void visit(while_statement *statement) override;
void visit(return_statement *statement) override;
void visit(defer_statement *statement) override;
void visit(procedure_call *call) override;
void visit(block *block) override;
void visit(cast_expression *expression) override;
void visit(traits_expression *trait) override;
void visit(binary_expression *expression) override;
void visit(unary_expression *expression) override;
void visit(variable_expression *) override;
void visit(array_access_expression *) override;
void visit(field_access_expression *) override;
void visit(dereference_expression *) override;
void visit(array_access_expression *expression) override;
void visit(field_access_expression *expression) override;
void visit(dereference_expression *expression) override;
void visit(literal<std::int32_t> *) override;
void visit(literal<std::uint32_t> *) override;
void visit(literal<double> *) override;

4
include/elna/boot/symbol.h
View File

@ -111,12 +111,16 @@ namespace elna::boot
explicit primitive_type(const std::string& identifier);
};
using type_field = std::pair<std::string, type>;
struct record_type
{
std::vector<type_field> fields;
};
struct union_type
{
std::vector<type_field> fields;
};
class type_info;

9
include/elna/gcc/elna-generic.h
View File

@ -34,13 +34,15 @@ namespace elna::gcc
{
std::deque<std::unique_ptr<boot::error>> do_semantic_analysis(const char *path,
std::unique_ptr<boot::program>& ast, std::shared_ptr<boot::symbol_table> info_table,
std::shared_ptr<symbol_table> symbols);
tree handle_symbol(const std::string& symbol_name, const boot::type& type, std::shared_ptr<symbol_table> symbols);
std::shared_ptr<symbol_table> symbols, std::unordered_map<std::string, tree>& unresolved);
tree handle_symbol(const std::string& symbol_name, const boot::type& type,
std::shared_ptr<symbol_table> symbols, std::unordered_map<std::string, tree>& unresolved);
class generic_visitor final : public boot::parser_visitor
{
tree current_expression{ NULL_TREE };
std::shared_ptr<symbol_table> symbols;
std::unordered_map<std::string, tree> unresolved;
tree build_label_decl(const char *name, location_t loc);
tree build_procedure_type(boot::procedure_type_expression& type);
@ -68,7 +70,8 @@ namespace elna::gcc
void visit_statements(const std::vector<boot::statement *>& statements);
public:
generic_visitor(std::shared_ptr<symbol_table> symbol_table);
generic_visitor(std::shared_ptr<symbol_table> symbol_table,
std::unordered_map<std::string, tree>&& unresolved);
void visit(boot::program *program) override;
void visit(boot::procedure_definition *definition) override;

1
include/elna/gcc/elna-tree.h
View File

@ -81,4 +81,5 @@ namespace elna::gcc
tree_code operator_code, tree left, tree right);
tree build_field(location_t location, tree record_type, const std::string name, tree type);
tree find_field_by_name(location_t expression_location, tree type, const std::string& field_name);
tree build_global_pointer_type(tree type);
}

162
source.elna
View File

@ -1,110 +1,110 @@
const
SEEK_SET* = 0
SEEK_CUR* = 1
SEEK_END* = 2
SEEK_SET* = 0;
SEEK_CUR* = 1;
SEEK_END* = 2;
TOKEN_IDENTIFIER* = 1
TOKEN_IF* = 2
TOKEN_THEN* = 3
TOKEN_ELSE* = 4
TOKEN_ELSIF* = 5
TOKEN_WHILE* = 6
TOKEN_DO* = 7
TOKEN_PROC* = 8
TOKEN_BEGIN* = 9
TOKEN_END* = 10
TOKEN_EXTERN* = 11
TOKEN_CONST* = 12
TOKEN_VAR* = 13
TOKEN_ARRAY* = 14
TOKEN_OF* = 15
TOKEN_TYPE* = 16
TOKEN_RECORD* = 17
TOKEN_UNION* = 18
TOKEN_POINTER* = 19
TOKEN_TO* = 20
TOKEN_BOOLEAN* = 21
TOKEN_NIL* = 22
TOKEN_AND* = 23
TOKEN_OR* = 24
TOKEN_NOT* = 25
TOKEN_RETURN* = 26
TOKEN_CAST* = 27
TOKEN_SHIFT_LEFT* = 28
TOKEN_SHIFT_RIGHT* = 29
TOKEN_LEFT_PAREN* = 30
TOKEN_RIGHT_PAREN* = 31
TOKEN_LEFT_SQUARE* = 32
TOKEN_RIGHT_SQUARE* = 33
TOKEN_GREATER_EQUAL* = 34
TOKEN_LESS_EQUAL* = 35
TOKEN_GREATER_THAN* = 36
TOKEN_LESS_THAN* = 37
TOKEN_NOT_EQUAL* = 38
TOKEN_EQUAL* = 39
TOKEN_SEMICOLON* = 40
TOKEN_DOT* = 41
TOKEN_COMMA* = 42
TOKEN_PLUS* = 43
TOKEN_MINUS* = 44
TOKEN_MULTIPLICATION* = 45
TOKEN_DIVISION* = 46
TOKEN_REMAINDER* = 47
TOKEN_ASSIGNMENT* = 48
TOKEN_COLON* = 49
TOKEN_HAT* = 50
TOKEN_AT* = 51
TOKEN_COMMENT* = 52
TOKEN_INTEGER* = 53
TOKEN_WORD* = 54
TOKEN_CHARACTER* = 55
TOKEN_STRING* = 56
TOKEN_DEFER* = 57
TOKEN_EXCLAMATION* = 58
TOKEN_ARROW = 59
TOKEN_IDENTIFIER* = 1;
TOKEN_IF* = 2;
TOKEN_THEN* = 3;
TOKEN_ELSE* = 4;
TOKEN_ELSIF* = 5;
TOKEN_WHILE* = 6;
TOKEN_DO* = 7;
TOKEN_PROC* = 8;
TOKEN_BEGIN* = 9;
TOKEN_END* = 10;
TOKEN_EXTERN* = 11;
TOKEN_CONST* = 12;
TOKEN_VAR* = 13;
TOKEN_ARRAY* = 14;
TOKEN_OF* = 15;
TOKEN_TYPE* = 16;
TOKEN_RECORD* = 17;
TOKEN_UNION* = 18;
TOKEN_POINTER* = 19;
TOKEN_TO* = 20;
TOKEN_BOOLEAN* = 21;
TOKEN_NIL* = 22;
TOKEN_AND* = 23;
TOKEN_OR* = 24;
TOKEN_NOT* = 25;
TOKEN_RETURN* = 26;
TOKEN_CAST* = 27;
TOKEN_SHIFT_LEFT* = 28;
TOKEN_SHIFT_RIGHT* = 29;
TOKEN_LEFT_PAREN* = 30;
TOKEN_RIGHT_PAREN* = 31;
TOKEN_LEFT_SQUARE* = 32;
TOKEN_RIGHT_SQUARE* = 33;
TOKEN_GREATER_EQUAL* = 34;
TOKEN_LESS_EQUAL* = 35;
TOKEN_GREATER_THAN* = 36;
TOKEN_LESS_THAN* = 37;
TOKEN_NOT_EQUAL* = 38;
TOKEN_EQUAL* = 39;
TOKEN_SEMICOLON* = 40;
TOKEN_DOT* = 41;
TOKEN_COMMA* = 42;
TOKEN_PLUS* = 43;
TOKEN_MINUS* = 44;
TOKEN_MULTIPLICATION* = 45;
TOKEN_DIVISION* = 46;
TOKEN_REMAINDER* = 47;
TOKEN_ASSIGNMENT* = 48;
TOKEN_COLON* = 49;
TOKEN_HAT* = 50;
TOKEN_AT* = 51;
TOKEN_COMMENT* = 52;
TOKEN_INTEGER* = 53;
TOKEN_WORD* = 54;
TOKEN_CHARACTER* = 55;
TOKEN_STRING* = 56;
TOKEN_DEFER* = 57;
TOKEN_EXCLAMATION* = 58;
TOKEN_ARROW = 59;
type
Position* = record
line: Word
line: Word;
column: Word
end
Location* = record
first: Position
first: Position;
last: Position
end
SourceFile* = record
buffer: [1024]Char
handle: ^FILE
size: Word
buffer: [1024]Char;
handle: ^FILE;
size: Word;
index: Word
end
FILE* = record end
StringBuffer* = record
data: ^Byte
size: Word
data: ^Byte;
size: Word;
capacity: Word
end
SourceCode = record
position: Position
position: Position;
input: ^Byte
empty: proc(^Byte) -> Bool
advance: proc(^Byte)
input: ^Byte;
empty: proc(^Byte) -> Bool;
advance: proc(^Byte);
head: proc(^Byte) -> Char
end
Token* = record
kind: Int
kind: Int;
value: union
int_value: Int
string: String
boolean_value: Bool
int_value: Int;
string: String;
boolean_value: Bool;
char_value: Char
end
end;
location: Location
end
CommandLine* = record
input: ^Char
tokenize: Bool
input: ^Char;
tokenize: Bool;
syntax_tree: Bool
end
@ -985,5 +985,5 @@ begin
end
begin
exit(process(cast(count: Int), cast(parameters: ^^Char)))
exit(process(count, parameters))
end.