anthem-rs/src/ast.rs

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2020-01-24 13:32:43 +01:00
// Operators
pub enum BinaryOperator
{
Plus,
Minus,
Multiplication,
Division,
Modulo,
Power,
}
pub enum ComparisonOperator
{
GreaterThan,
LessThan,
LessEqual,
GreaterEqual,
NotEqual,
Equal,
}
pub enum UnaryOperator
{
AbsoluteValue,
Minus,
}
// Primitives
pub struct FunctionDeclaration
{
pub name: String,
pub arity: usize,
}
pub struct PredicateDeclaration
{
pub name: String,
pub arity: usize,
}
pub struct VariableDeclaration
{
pub name: String,
}
// Terms
pub struct BinaryOperation
{
pub operator: BinaryOperator,
pub left: Box<Term>,
pub right: Box<Term>,
}
pub struct Function
{
pub declaration: std::rc::Rc<FunctionDeclaration>,
pub arguments: Vec<Box<Term>>,
}
pub struct Interval
{
pub from: Box<Term>,
pub to: Box<Term>,
}
pub enum SpecialInteger
{
Infimum,
Supremum,
}
pub struct UnaryOperation
{
pub operator: UnaryOperator,
pub argument: Box<Term>,
}
pub struct Variable
{
pub declaration: std::rc::Rc<VariableDeclaration>,
}
// Formulas
pub struct Biconditional
{
pub left: Box<Formula>,
pub right: Box<Formula>,
}
pub struct Comparison
{
pub operator: ComparisonOperator,
pub left: Box<Term>,
pub right: Box<Term>,
}
pub struct Exists
{
pub parameters: Vec<std::rc::Rc<VariableDeclaration>>,
pub argument: Box<Formula>,
}
pub struct ForAll
{
pub parameters: Vec<std::rc::Rc<VariableDeclaration>>,
pub argument: Box<Formula>,
}
pub struct Implies
{
pub left: Box<Formula>,
pub right: Box<Formula>,
}
pub struct Predicate
{
pub declaration: std::rc::Rc<PredicateDeclaration>,
pub arguments: Vec<Box<Term>>,
}
// Variants
pub enum Term
{
BinaryOperation(BinaryOperation),
Boolean(bool),
Function(Function),
Integer(i32),
Interval(Interval),
SpecialInteger(SpecialInteger),
String(String),
UnaryOperation(UnaryOperation),
Variable(Variable),
}
pub type Terms = Vec<Box<Term>>;
pub enum Formula
{
And(Formulas),
Biconditional(Biconditional),
Boolean(bool),
Comparison(Comparison),
Exists(Exists),
ForAll(ForAll),
Implies(Implies),
Not(Box<Formula>),
Or(Formulas),
Predicate(Predicate),
}
pub type Formulas = Vec<Box<Formula>>;