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Allow typechecker to perform implicit casts

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This commit is contained in:
Sofia 2026-04-13 21:32:34 +03:00
parent 1555c12bbd
commit ee0e30934a
2 changed files with 10 additions and 5 deletions
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13
src/typechecker.cpp
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@ -10,10 +10,15 @@ namespace {
Castable,
};
Result<TypecheckRes, std::string> check_type(std::shared_ptr<types::Type> checked, std::shared_ptr<types::Type> target) {
Result<TypecheckRes, std::string> check_type(typecheck::State& state, std::shared_ptr<types::Type> checked, std::shared_ptr<types::Type> target) {
auto potential_cast = types::find_cast(state.casts, checked, target);
if (types::types_equal(checked, target)) {
return TypecheckRes::Ok;
}
else if (potential_cast.has_value() && potential_cast->allow_implicit) {
return TypecheckRes::Castable;
}
return std::string{ "Types " + checked->formatted() + " and " + target->formatted() + " incompatible" };
}
@ -156,7 +161,7 @@ namespace AST {
auto expected_param_ty = fn_ty->m_param_tys[i];
auto param_ty = this->m_args[i]->typecheck(state, scope, expected_param_ty);
auto check_res = check_type(param_ty, expected_param_ty);
auto check_res = check_type(state, param_ty, expected_param_ty);
this->m_args[i] = handle_res(std::move(this->m_args[i]), check_res, state);
}
else {
@ -190,7 +195,7 @@ namespace AST {
void ReturnStatement::typecheck(typecheck::State& state, typecheck::Scope& scope) {
auto res_ty = this->m_expr->typecheck(state, scope, scope.return_ty);
if (scope.return_ty) {
auto check_res = check_type(res_ty, *scope.return_ty);
auto check_res = check_type(state, res_ty, *scope.return_ty);
this->m_expr = handle_res(std::move(this->m_expr), check_res, state);
}
}
@ -211,7 +216,7 @@ namespace AST {
new types::FundamentalType{ types::FundamentalTypeKind::Bool } };
auto expr_ty = this->m_condition->typecheck(state, scope, bool_ty);
auto check_res = check_type(expr_ty, bool_ty);
auto check_res = check_type(state, expr_ty, bool_ty);
this->m_condition = handle_res(std::move(this->m_condition), check_res, state);
this->m_then->typecheck(state, scope);

2
src/types.cpp
View File

@ -76,7 +76,7 @@ namespace types {
}
bool Type::is_signed() {
false;
return false;
}
std::pair<llvm::Value*, std::shared_ptr<Type>> FundamentalType::load(codegen::Builder&, llvm::Value* ptr) {