60 lines
1.4 KiB
C++
60 lines
1.4 KiB
C++
#include <pslang/ast/preprocess.hpp>
|
|
#include <pslang/ast/statement_visitor.hpp>
|
|
#include <pslang/ast/error.hpp>
|
|
#include <pslang/types/type.hpp>
|
|
|
|
namespace pslang::ast
|
|
{
|
|
|
|
namespace
|
|
{
|
|
|
|
struct validate_visitor
|
|
: const_statement_visitor<validate_visitor>
|
|
{
|
|
using const_statement_visitor::apply;
|
|
|
|
void apply(expression_ptr const &) {}
|
|
|
|
void apply(assignment const &) {}
|
|
|
|
void apply(variable_declaration const &) {}
|
|
|
|
void apply(if_chain const & node)
|
|
{
|
|
for (auto const & block : node.blocks)
|
|
apply(*block.statements);
|
|
}
|
|
|
|
void apply(while_block const & node)
|
|
{
|
|
apply(*node.statements);
|
|
}
|
|
|
|
void apply(function_definition const & node)
|
|
{
|
|
apply(*node.statements);
|
|
if (!types::equal(*get_type(*node.return_type), types::unit_type{}))
|
|
if (node.statements->statements.empty() || (true
|
|
&& !std::get_if<return_statement>(node.statements->statements.back().get())
|
|
&& !std::get_if<if_chain>(node.statements->statements.back().get())
|
|
&& !std::get_if<while_block>(node.statements->statements.back().get())
|
|
))
|
|
throw validation_error("Function returning non-unit is missing a return statement in the end", node.location);
|
|
}
|
|
|
|
void apply(foreign_function_declaration const &) {}
|
|
|
|
void apply(return_statement const &) {}
|
|
|
|
void apply(struct_definition const &) {}
|
|
};
|
|
|
|
}
|
|
|
|
void validate(statement_list_ptr & statements)
|
|
{
|
|
validate_visitor{}.apply(*statements);
|
|
}
|
|
|
|
}
|