From 2ce7acedff164f82eaf6518aff45a35bd38d255b Mon Sep 17 00:00:00 2001
From: Amadeusz Juskowiak <amadeusz@amanointeractive.com>
Date: Thu, 22 Dec 2016 08:15:21 +0100
Subject: [PATCH] moved to ? operator instead of try!

---
 src/calculator.rs            | 4 ++--
 src/evaluator.rs             | 6 +++---
 src/polynomial_calculator.rs | 6 +++---
 3 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/src/calculator.rs b/src/calculator.rs
index 60623d6..684348b 100644
--- a/src/calculator.rs
+++ b/src/calculator.rs
@@ -49,8 +49,8 @@ pub trait Calculator<T, P, E>
     let evaluator = E::default();
 
     let tokens = tokenizer.process(line);
-    let parsed_tokens = try!(parser.process(tokens));
-    let evaluated = try!(evaluator.process(parsed_tokens));
+    let parsed_tokens = parser.process(tokens)?;
+    let evaluated = evaluator.process(parsed_tokens)?;
 
     Ok(evaluated)
   }
diff --git a/src/evaluator.rs b/src/evaluator.rs
index e6695c4..d9037c8 100644
--- a/src/evaluator.rs
+++ b/src/evaluator.rs
@@ -247,7 +247,7 @@ impl TokensReducer for Evaluator {
       match *token {
         Token::Number(x) => stack.push(Polynomial::constant(x)),
         Token::Operator(x) => {
-          let result = try!(self.call_function(&x.to_string(), position, &mut stack));
+          let result = self.call_function(&x.to_string(), position, &mut stack)?;
           stack.push(result);
         },
         Token::Identifier(idx) => {
@@ -258,7 +258,7 @@ impl TokensReducer for Evaluator {
             continue;
           }
 
-          let result = try!(self.call_function(&x, position, &mut stack));
+          let result = self.call_function(&x, position, &mut stack)?;
           stack.push(result);
         },
         _ => unreachable!()
@@ -556,7 +556,7 @@ mod tests {
     evaluator.register_function("*", Function::new(2, Box::new(multiplication)));
 
     evaluator.register_function("mod", Function::new(2, Box::new(|args|{
-      Ok(Polynomial::constant(try!(args[0].clone().as_f64()) % try!(args[1].clone().as_f64())))
+      Ok(Polynomial::constant(args[0].clone().as_f64()? % args[1].clone().as_f64()?))
     })));
 
     assert_eq!(evaluator.process(parser.process(tokenize_ref!("mod(17, 4)")).unwrap()), Ok(Polynomial::constant(1.0)));
diff --git a/src/polynomial_calculator.rs b/src/polynomial_calculator.rs
index 21751d0..9b2c7e2 100644
--- a/src/polynomial_calculator.rs
+++ b/src/polynomial_calculator.rs
@@ -258,7 +258,7 @@ pub mod functions {
   /// It will return a wrapped `PolynomialError::NonConstantError` when any of the
   /// arguments is not a constant polynomial (a polynomial of degree zero).
   pub fn log(args: Vec<Polynomial>) -> Result<Polynomial, EvaluationError> {
-    Ok(Polynomial::constant(try!(args[0].as_f64()).log(try!(args[1].as_f64()))))
+    Ok(Polynomial::constant(args[0].as_f64()?.log(args[1].as_f64()?)))
   }
 
   /// Computes a decimal logarithm (requires a single constant argument).
@@ -277,7 +277,7 @@ pub mod functions {
   /// It will return a wrapped `PolynomialError::NonConstantError` when the argument
   /// is not a constant polynomial (a polynomial of degree zero).
   pub fn log10(args: Vec<Polynomial>) -> Result<Polynomial, EvaluationError> {
-    Ok(Polynomial::constant(try!(args[0].as_f64()).log10()))
+    Ok(Polynomial::constant(args[0].as_f64()?.log10()))
   }
 
   /// Binds a polynomial with a value (requires two arguments).
@@ -299,7 +299,7 @@ pub mod functions {
   /// It will return a wrapped `PolynomialError::NonConstantError` when the second
   /// argument is not a constant polynomial (a polynomial of degree zero).
   pub fn bind(args: Vec<Polynomial>) -> Result<Polynomial, EvaluationError> {
-    Ok(args[0].bind(try!(args[1].as_f64())))
+    Ok(args[0].bind(args[1].as_f64()?))
   }
 
   /// Performs exponentiation of polynomial (requires two arguments).