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Code Issues 34 Pull Requests Releases Activity

Check only a pointer can be dereferenced

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This commit is contained in:
Eugen Wissner
2025-03-23 10:14:04 +01:00
parent 07ed40cc24
commit 6ccb195c09
3 changed files with 45 additions and 33 deletions
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29
boot/ast.cc
View File

@@ -71,35 +71,6 @@ namespace elna::boot
return nullptr;
}
void statement::accept(parser_visitor *visitor)
{
if (assign_statement *node = is_assign())
{
return node->accept(visitor);
}
else if (if_statement *node = is_if())
{
return node->accept(visitor);
}
else if (while_statement *node = is_while())
{
return node->accept(visitor);
}
else if (return_statement *node = is_return())
{
return node->accept(visitor);
}
else if (defer_statement *node = is_defer())
{
return node->accept(visitor);
}
else if (procedure_call *node = is_call_statement())
{
return node->accept(visitor);
}
__builtin_unreachable();
}
expression::expression()
{
}

15
gcc/elna-generic.cc
View File

@@ -1071,9 +1071,20 @@ namespace elna::gcc
void generic_visitor::visit(boot::dereference_expression *expression)
{
expression->base().accept(this);
location_t expression_location = get_location(&expression->position());
tree expression_type = TREE_TYPE(this->current_expression);
this->current_expression = build1_loc(get_location(&expression->position()), INDIRECT_REF,
TREE_TYPE(TREE_TYPE(this->current_expression)), this->current_expression);
if (is_pointer_type(expression_type))
{
this->current_expression = build1_loc(expression_location, INDIRECT_REF,
TREE_TYPE(expression_type), this->current_expression);
}
else
{
error_at(expression_location, "Type '%s' cannot be dereferenced, it is not a pointer",
print_type(expression_type).c_str());
this->current_expression = error_mark_node;
}
}
void generic_visitor::visit(boot::assign_statement *statement)

34
include/elna/boot/ast.h
View File

@@ -156,7 +156,36 @@ namespace elna::boot
virtual defer_statement *is_defer();
virtual procedure_call *is_call_statement();
void accept(parser_visitor *visitor);
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:
@@ -739,7 +768,8 @@ namespace elna::boot
}
}
void accept(parser_visitor *visitor)
template<typename V>
void accept(V *visitor)
{
visitor->visit(this);
}