Add parse_int and parse_float.

tests/float.rs

@@ -20,6 +20,15 @@ fn test_float() -> Result<(), Box<EvalAltResult>> {
     Ok(())
 }
 
+#[test]
+fn test_float_parse() -> Result<(), Box<EvalAltResult>> {
+    let engine = Engine::new();
+
+    assert!((engine.eval::<FLOAT>(r#"parse_float("9.9999")"#)? - 9.9999 as FLOAT).abs() < EPSILON);
+
+    Ok(())
+}
+
 #[test]
 #[cfg(not(feature = "no_object"))]
 fn test_struct_with_float() -> Result<(), Box<EvalAltResult>> {

tests/math.rs

@@ -108,3 +108,14 @@ fn test_math() -> Result<(), Box<EvalAltResult>> {
 
     Ok(())
 }
+
+#[test]
+fn test_math_parse() -> Result<(), Box<EvalAltResult>> {
+    let engine = Engine::new();
+
+    assert_eq!(engine.eval::<INT>(r#"parse_int("42")"#)?, 42);
+    assert_eq!(engine.eval::<INT>(r#"parse_int("42", 16)"#)?, 0x42);
+    assert_eq!(engine.eval::<INT>(r#"parse_int("abcdef", 16)"#)?, 0xabcdef);
+
+    Ok(())
+}