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[Tolk] bool type (-1/0 int under the hood)

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Comparison operators `== / >= /...` return `bool`.
Logical operators `&& ||` return bool.
Constants `true` and `false` have the `bool` type.
Lots of stdlib functions return `bool`, not `int`.

Operator `!x` supports both `int` and `bool`.
Condition of `if` accepts both `int` and `bool`.
Arithmetic operators are restricted to integers.
Logical `&&` and `||` accept both `bool` and `int`.

No arithmetic operations with bools allowed (only bitwise and logical).
This commit is contained in:
tolk-vm 2025-01-13 15:21:24 +07:00
parent 799e2d1265
commit 974d76c5f6
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GPG key ID: 7905DD7FE0324B12
33 changed files with 764 additions and 212 deletions
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22
tolk/type-system.cpp
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@ -76,6 +76,7 @@ public:
std::unordered_map<uint64_t, TypePtr> TypeDataTypeIdCalculation::all_unique_occurred_types;
TypePtr TypeDataInt::singleton;
TypePtr TypeDataBool::singleton;
TypePtr TypeDataCell::singleton;
TypePtr TypeDataSlice::singleton;
TypePtr TypeDataBuilder::singleton;
@ -87,6 +88,7 @@ TypePtr TypeDataVoid::singleton;
void type_system_init() {
TypeDataInt::singleton = new TypeDataInt;
TypeDataBool::singleton = new TypeDataBool;
TypeDataCell::singleton = new TypeDataCell;
TypeDataSlice::singleton = new TypeDataSlice;
TypeDataBuilder::singleton = new TypeDataBuilder;
@ -330,6 +332,16 @@ bool TypeDataInt::can_rhs_be_assigned(TypePtr rhs) const {
return false;
}
bool TypeDataBool::can_rhs_be_assigned(TypePtr rhs) const {
if (rhs == this) {
return true;
}
if (rhs == TypeDataNullLiteral::create()) {
return true;
}
return false;
}
bool TypeDataCell::can_rhs_be_assigned(TypePtr rhs) const {
if (rhs == this) {
return true;
@ -446,6 +458,10 @@ bool TypeDataInt::can_be_casted_with_as_operator(TypePtr cast_to) const {
return cast_to == this;
}
bool TypeDataBool::can_be_casted_with_as_operator(TypePtr cast_to) const {
return cast_to == this || cast_to == TypeDataInt::create();
}
bool TypeDataCell::can_be_casted_with_as_operator(TypePtr cast_to) const {
return cast_to == this;
}
@ -468,7 +484,7 @@ bool TypeDataContinuation::can_be_casted_with_as_operator(TypePtr cast_to) const
bool TypeDataNullLiteral::can_be_casted_with_as_operator(TypePtr cast_to) const {
return cast_to == this
|| cast_to == TypeDataInt::create() || cast_to == TypeDataCell::create() || cast_to == TypeDataSlice::create()
|| cast_to == TypeDataInt::create() || cast_to == TypeDataBool::create() || cast_to == TypeDataCell::create() || cast_to == TypeDataSlice::create()
|| cast_to == TypeDataBuilder::create() || cast_to == TypeDataContinuation::create() || cast_to == TypeDataTuple::create()
|| cast_to->try_as<TypeDataTypedTuple>();
}
@ -593,6 +609,9 @@ static TypePtr parse_simple_type(Lexer& lex) {
case tok_int:
lex.next();
return TypeDataInt::create();
case tok_bool:
lex.next();
return TypeDataBool::create();
case tok_cell:
lex.next();
return TypeDataCell::create();
@ -614,7 +633,6 @@ static TypePtr parse_simple_type(Lexer& lex) {
case tok_void:
lex.next();
return TypeDataVoid::create();
case tok_bool:
case tok_self:
case tok_identifier: {
SrcLocation loc = lex.cur_location();