Решение на Логически изрази от Йосиф Иванов
Резултати
- 11 точки от тестове
- 0 бонус точки
- 11 точки общо
- 11 успешни тест(а)
- 9 неуспешни тест(а)
Код
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Expr {
Atom(char),
Not(Box<Expr>),
And(Vec<Expr>),
Or(Vec<Expr>),
}
#[derive(Debug, PartialEq, Eq)]
pub enum ParseError {
UnexpectedExpr,
UnexpectedUnaryOp,
UnexpectedBinOp,
UnexpectedParen,
UnexpectedEnd,
}
pub struct SimpleExprParser {
exprs: Vec<Expr>,
last_op: Option<char>,
last_atom: bool,
}
impl SimpleExprParser {
pub fn new() -> SimpleExprParser {
SimpleExprParser {
exprs: Vec::new(),
last_op: None,
last_atom: false,
}
}
pub fn push_atom(&mut self, c: char) -> Result<(), ParseError> {
if self.last_atom {
return Err(ParseError::UnexpectedExpr);
}
if let Some(op) = self.last_op.take() {
match op {
'&' => {
if let Some(Expr::And(ref mut vec)) = self.exprs.last_mut() {
vec.push(Expr::Atom(c));
} else {
self.exprs.push(Expr::And(vec![Expr::Atom(c)]));
}
}
'|' => {
if let Some(Expr::Or(ref mut vec)) = self.exprs.last_mut() {
vec.push(Expr::Atom(c));
} else {
self.exprs.push(Expr::Or(vec![Expr::Atom(c)]));
}
}
'!' => {
self.exprs.push(Expr::Not(Box::new(Expr::Atom(c))));
}
_ => return Err(ParseError::UnexpectedUnaryOp),
}
} else {
self.exprs.push(Expr::Atom(c));
}
self.last_atom = true;
Ok(())
}
pub fn push_op(&mut self, op: char) -> Result<(), ParseError> {
if self.last_op.is_some() {
return Err(ParseError::UnexpectedBinOp);
}
if !self.last_atom && op != '!' {
return Err(ParseError::UnexpectedUnaryOp);
}
self.last_op = Some(op);
self.last_atom = false;
Ok(())
}
pub fn finish(mut self) -> Result<Expr, ParseError> {
if self.last_op.is_some() {
return Err(ParseError::UnexpectedEnd);
}
if self.exprs.len() == 1 {
Ok(self.exprs.remove(0))
} else if self.exprs.len() > 1 {
let mut combined_exprs = Vec::new();
while let Some(expr) = self.exprs.pop() {
combined_exprs.insert(0, expr);
}
Ok(Expr::And(combined_exprs))
} else {
Err(ParseError::UnexpectedEnd)
}
}
}
pub struct ExprParser {
stack: Vec<Expr>,
ops: Vec<char>,
}
impl ExprParser {
pub fn new() -> ExprParser {
ExprParser {
stack: Vec::new(),
ops: Vec::new(),
}
}
pub fn push_atom(&mut self, c: char) -> Result<(), ParseError> {
self.stack.push(Expr::Atom(c));
Ok(())
}
pub fn push_op(&mut self, op: char) -> Result<(), ParseError> {
self.ops.push(op);
Ok(())
}
pub fn open_paren(&mut self) -> Result<(), ParseError> {
self.ops.push('(');
Ok(())
}
pub fn close_paren(&mut self) -> Result<(), ParseError> {
while let Some(op) = self.ops.pop() {
if op == '(' {
break;
}
self.apply_op(op)?;
}
Ok(())
}
pub fn finish(mut self) -> Result<Expr, ParseError> {
while let Some(op) = self.ops.pop() {
self.apply_op(op)?;
}
if self.stack.len() == 1 {
Ok(self.stack.pop().unwrap())
} else {
Err(ParseError::UnexpectedEnd)
}
}
fn apply_op(&mut self, op: char) -> Result<(), ParseError> {
match op {
'&' => {
let right = self.stack.pop().ok_or(ParseError::UnexpectedEnd)?;
let left = self.stack.pop().ok_or(ParseError::UnexpectedEnd)?;
self.stack.push(Expr::And(vec![left, right]));
}
'|' => {
let right = self.stack.pop().ok_or(ParseError::UnexpectedEnd)?;
let left = self.stack.pop().ok_or(ParseError::UnexpectedEnd)?;
self.stack.push(Expr::Or(vec![left, right]));
}
'!' => {
let expr = self.stack.pop().ok_or(ParseError::UnexpectedEnd)?;
self.stack.push(Expr::Not(Box::new(expr)));
}
_ => return Err(ParseError::UnexpectedUnaryOp),
}
Ok(())
}
}
#[derive(Clone, Debug, PartialEq, Eq)]
pub enum Value {
True,
False,
Expr(Expr),
}
pub fn eval(expr: &Expr, truthy: &[char], falsy: &[char]) -> Value {
match expr {
Expr::Atom(c) => {
if truthy.contains(c) {
Value::True
} else if falsy.contains(c) {
Value::False
} else {
Value::Expr(expr.clone())
}
}
Expr::Not(e) => match eval(e, truthy, falsy) {
Value::True => Value::False,
Value::False => Value::True,
Value::Expr(e) => Value::Expr(Expr::Not(Box::new(e))),
},
Expr::And(exprs) => {
let mut new_exprs = Vec::new();
for e in exprs {
match eval(e, truthy, falsy) {
Value::True => continue,
Value::False => return Value::False,
Value::Expr(e) => new_exprs.push(e),
}
}
if new_exprs.is_empty() {
Value::True
} else if new_exprs.len() == 1 {
Value::Expr(new_exprs.pop().unwrap())
} else {
Value::Expr(Expr::And(new_exprs))
}
}
Expr::Or(exprs) => {
let mut new_exprs = Vec::new();
for e in exprs {
match eval(e, truthy, falsy) {
Value::True => return Value::True,
Value::False => continue,
Value::Expr(e) => new_exprs.push(e),
}
}
if new_exprs.is_empty() {
Value::False
} else if new_exprs.len() == 1 {
Value::Expr(new_exprs.pop().unwrap())
} else {
Value::Expr(Expr::Or(new_exprs))
}
}
}
}
Лог от изпълнението
Compiling solution v0.1.0 (/tmp/d20241224-258381-19phgjh/solution)
warning: variable does not need to be mutable
--> tests/solution_test.rs:306:13
|
306 | let mut parser = SimpleExprParser::new();
| ----^^^^^^
| |
| help: remove this `mut`
|
= note: `#[warn(unused_mut)]` on by default
warning: `solution` (test "solution_test") generated 1 warning
Finished test [unoptimized + debuginfo] target(s) in 1.73s
Running tests/solution_test.rs (target/debug/deps/solution_test-1428e1090729d165)
running 20 tests
test solution_test::test_eval_full ... ok
test solution_test::test_error_paren_mismatched ... FAILED
test solution_test::test_eval_not_and_or ... ok
test solution_test::test_eval_partial ... ok
test solution_test::test_eval_unwrap_and_or ... ok
test solution_test::test_eval_unwrap_nested ... ok
test solution_test::test_paren_around_expr ... ok
test solution_test::test_paren_expr_priority ... ok
test solution_test::test_paren_nested ... ok
test solution_test::test_paren_not ... FAILED
test solution_test::test_paren_surrounded ... FAILED
test solution_test::test_parser_alternating_ops ... FAILED
test solution_test::test_parser_atom ... ok
test solution_test::test_parser_and_or ... FAILED
test solution_test::test_parser_error_unexpected_end ... ok
test solution_test::test_parser_errors_basic ... FAILED
test solution_test::test_parser_expr_and_not ... FAILED
test solution_test::test_parser_multiple_atoms_same_op ... FAILED
test solution_test::test_parser_multiple_not ... FAILED
test solution_test::test_parser_not ... ok
failures:
---- solution_test::test_error_paren_mismatched stdout ----
thread '<unnamed>' panicked at 'assertion failed: matches!(parser.close_paren(), Err(_))', tests/solution_test.rs:327:9
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace
thread 'solution_test::test_error_paren_mismatched' panicked at 'called `Option::unwrap()` on a `None` value', tests/solution_test.rs:325:5
---- solution_test::test_paren_not stdout ----
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
left: `Not(Or([Or([Atom('A'), Atom('B')]), Atom('X')]))`,
right: `Or([Not(Or([Atom('A'), Atom('B')])), Atom('X')])`', tests/solution_test.rs:226:9
thread 'solution_test::test_paren_not' panicked at 'assertion failed: `(left == right)`
left: `Not(Or([Or([Atom('A'), Atom('B')]), Atom('X')]))`,
right: `Or([Not(Or([Atom('A'), Atom('B')])), Atom('X')])`', tests/solution_test.rs:216:5
---- solution_test::test_paren_surrounded stdout ----
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
left: `Or([Atom('X'), Or([And([Atom('A'), Atom('B')]), Or([And([Atom('C'), Atom('D')]), Atom('Y')])])])`,
right: `Or([Atom('X'), And([Atom('A'), Atom('B')]), And([Atom('C'), Atom('D')]), Atom('Y')])`', tests/solution_test.rs:238:9
thread 'solution_test::test_paren_surrounded' panicked at 'assertion failed: `(left == right)`
left: `Or([Atom('X'), Or([And([Atom('A'), Atom('B')]), Or([And([Atom('C'), Atom('D')]), Atom('Y')])])])`,
right: `Or([Atom('X'), And([Atom('A'), Atom('B')]), And([Atom('C'), Atom('D')]), Atom('Y')])`', tests/solution_test.rs:235:5
---- solution_test::test_parser_alternating_ops stdout ----
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
left: `And([Atom('A'), And([Atom('B')]), Or([Atom('C')]), And([Atom('D')])])`,
right: `And([Or([And([Atom('A'), Atom('B')]), Atom('C')]), Atom('D')])`', tests/solution_test.rs:160:9
thread 'solution_test::test_parser_alternating_ops' panicked at 'assertion failed: `(left == right)`
left: `And([Atom('A'), And([Atom('B')]), Or([Atom('C')]), And([Atom('D')])])`,
right: `And([Or([And([Atom('A'), Atom('B')]), Atom('C')]), Atom('D')])`', tests/solution_test.rs:157:5
---- solution_test::test_parser_and_or stdout ----
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
left: `And([Atom('A'), And([Atom('B')])])`,
right: `And([Atom('A'), Atom('B')])`', tests/solution_test.rs:88:9
thread 'solution_test::test_parser_and_or' panicked at 'assertion failed: `(left == right)`
left: `And([Atom('A'), And([Atom('B')])])`,
right: `And([Atom('A'), Atom('B')])`', tests/solution_test.rs:84:5
---- solution_test::test_parser_errors_basic stdout ----
thread '<unnamed>' panicked at 'assertion failed: matches!(parser.push_op(\'!\'), Err(_))', tests/solution_test.rs:278:9
thread 'solution_test::test_parser_errors_basic' panicked at 'called `Option::unwrap()` on a `None` value', tests/solution_test.rs:265:5
---- solution_test::test_parser_expr_and_not stdout ----
thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: UnexpectedBinOp', tests/solution_test.rs:109:44
thread 'solution_test::test_parser_expr_and_not' panicked at 'called `Result::unwrap()` on an `Err` value: UnexpectedBinOp', tests/solution_test.rs:107:5
---- solution_test::test_parser_multiple_atoms_same_op stdout ----
thread '<unnamed>' panicked at 'assertion failed: `(left == right)`
left: `And([Atom('A'), And([Atom('B'), Atom('C')])])`,
right: `And([Atom('A'), Atom('B'), Atom('C')])`', tests/solution_test.rs:127:9
thread 'solution_test::test_parser_multiple_atoms_same_op' panicked at 'assertion failed: `(left == right)`
left: `And([Atom('A'), And([Atom('B'), Atom('C')])])`,
right: `And([Atom('A'), Atom('B'), Atom('C')])`', tests/solution_test.rs:124:5
---- solution_test::test_parser_multiple_not stdout ----
thread '<unnamed>' panicked at 'called `Result::unwrap()` on an `Err` value: UnexpectedBinOp', tests/solution_test.rs:142:42
thread 'solution_test::test_parser_multiple_not' panicked at 'called `Result::unwrap()` on an `Err` value: UnexpectedBinOp', tests/solution_test.rs:140:5
failures:
solution_test::test_error_paren_mismatched
solution_test::test_paren_not
solution_test::test_paren_surrounded
solution_test::test_parser_alternating_ops
solution_test::test_parser_and_or
solution_test::test_parser_errors_basic
solution_test::test_parser_expr_and_not
solution_test::test_parser_multiple_atoms_same_op
solution_test::test_parser_multiple_not
test result: FAILED. 11 passed; 9 failed; 0 ignored; 0 measured; 0 filtered out; finished in 0.00s
error: test failed, to rerun pass `--test solution_test`