external/ton
1
0
Fork 0
mirror of https://github.com/ton-blockchain/ton synced 2025-03-09 15:40:10 +00:00
Code Issues Releases Wiki Activity

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

Browse source 
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
No known key found for this signature in database
GPG key ID: 7905DD7FE0324B12
33 changed files with 764 additions and 212 deletions
Download patch file Download diff file Expand all files Collapse all files

18
tolk/type-system.h
View file

@ -120,6 +120,24 @@ public:
bool can_be_casted_with_as_operator(TypePtr cast_to) const override;
};
/*
* `bool` is TypeDataBool. TVM has no bool, only integers. Under the hood, -1 is true, 0 is false.
* From the type system point of view, int and bool are different, not-autocastable types.
*/
class TypeDataBool final : public TypeData {
TypeDataBool() : TypeData(2ULL, 0) {}
static TypePtr singleton;
friend void type_system_init();
public:
static TypePtr create() { return singleton; }
std::string as_human_readable() const override { return "bool"; }
bool can_rhs_be_assigned(TypePtr rhs) const override;
bool can_be_casted_with_as_operator(TypePtr cast_to) const override;
};
/*
* `cell` is TypeDataCell, representation of TVM cell.
*/