update serde to version 0.9, bump version 0.4.0

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "eval"
-version = "0.3.2"
+version = "0.4.0"
 description = "Expression evaluator"
 keywords = ["expression", "evaluate", "evaluator", "expr", "template"]
 authors = ["fengcen <fengcen.love@gmail.com>"]
@@ -15,8 +15,8 @@ name = "eval"
 path = "src/lib.rs"
 
 [dependencies]
-serde = "^0.8"
-serde_json = "^0.8"
+serde = "^0.9"
+serde_json = "^0.9"
 quick-error = "^1.1"
 
 [features]

README.md

@@ -2,7 +2,7 @@
 eval
 ====
 [![Project Status: Active - The project has reached a stable, usable state and is being actively developed.](http://www.repostatus.org/badges/latest/active.svg)](http://www.repostatus.org/#active)
-[![docs](https://docs.rs/eval/badge.svg?version=0.3.2 "docs")](https://docs.rs/eval)
+[![docs](https://docs.rs/eval/badge.svg?version=0.4.0 "docs")](https://docs.rs/eval)
 
 Eval is a powerful expression evaluator.
 
@@ -23,7 +23,7 @@ Add dependency to Cargo.toml
 
 ```toml
 [dependencies]
-eval = "^0.3"
+eval = "^0.4"
 ```
 
 In your `main.rs` or `lib.rs`:

src/builtin/mod.rs

@@ -82,14 +82,12 @@ fn create_is_empty_fuction() -> Function {
     Function {
         max_args: Some(1),
         min_args: Some(1),
-        compiled: Box::new(|values| {
-            match *values.first().unwrap() {
+        compiled: Box::new(|values| match *values.first().unwrap() {
             Value::String(ref string) => Ok(to_value(string.is_empty())),
             Value::Array(ref array) => Ok(to_value(array.is_empty())),
             Value::Object(ref object) => Ok(to_value(object.is_empty())),
             Value::Null => Ok(to_value(true)),
             _ => Ok(to_value(false)),
-            }
         }),
     }
 }

src/lib.rs

@@ -109,11 +109,19 @@ mod builtin;
 mod expr;
 
 pub use expr::ExecOptions;
-pub use serde_json::{Value, to_value};
+pub use serde_json::Value;
 pub use error::Error;
 pub use function::Function;
 pub use expr::Expr;
+
 use std::collections::HashMap;
+use serde_json::to_value as json_to_value;
+use serde::Serialize;
+
+/// Convert variable to `serde_json::Value`
+pub fn to_value<S: Serialize>(v: S) -> Value {
+    json_to_value(v).unwrap()
+}
 
 /// Custom context.
 pub type Context = HashMap<String, Value>;
@@ -134,7 +142,7 @@ type Compiled = Box<Fn(&[Context], &Functions) -> Result<Value, Error>>;
 
 #[cfg(test)]
 mod tests {
-    use serde_json::to_value;
+    use to_value;
     use error::Error;
     use Expr;
     use tree::Tree;

src/math/mod.rs

@@ -1,5 +1,6 @@
 
-use serde_json::{Value, to_value};
+use serde_json::Value;
+use to_value;
 use error::Error;
 
 pub trait Math {
@@ -162,9 +163,7 @@ trait Type {
 impl Type for Value {
     fn get_f64(&self) -> f64 {
         match *self {
-            Value::F64(f) => f,
-            Value::I64(f) => f as f64,
-            Value::U64(f) => f as f64,
+            Value::Number(ref n) => n.as_f64().unwrap(),
             _ => panic!("not a number"),
         }
     }

src/operator/mod.rs

@@ -1,6 +1,7 @@
 
 use std::str::FromStr;
-use serde_json::{Value, to_value};
+use serde_json::Value;
+use to_value;
 use error::Error;
 use node::Node;
 

src/tree/mod.rs

@@ -1,7 +1,8 @@
 
 use std::str::FromStr;
 use std::clone::Clone;
-use serde_json::{Value, to_value};
+use serde_json::Value;
+use to_value;
 use math::Math;
 use operator::Operator;
 use node::Node;
@@ -368,7 +369,7 @@ impl Tree {
                                 if child.operator.is_identifier() {
                                     value = value.as_ref()
                                         .unwrap()
-                                        .find(child.operator.get_identifier())
+                                        .get(child.operator.get_identifier())
                                         .cloned();
                                 } else {
                                     return Err(Error::ExpectedIdentifier);
@@ -405,7 +406,7 @@ impl Tree {
                                 if name.is_string() {
                                     value = value.as_ref()
                                         .unwrap()
-                                        .find(name.as_str().unwrap())
+                                        .get(name.as_str().unwrap())
                                         .cloned();
                                 } else {
                                     return Err(Error::ExpectedIdentifier);