Finish the MathNumber implementations.

src/renderer/math.rs

@@ -1,4 +1,5 @@
 use crate::parser::OwnedLiteral;
+use std::convert::TryFrom;
 use std::convert::TryInto;
 use std::ops::Add;
 use std::ops::Div;
@@ -138,13 +139,25 @@ impl Rem<MathNumber> for MathNumber {
 
 impl MathNumber {
     fn math_abs(&self) -> Option<OwnedLiteral> {
-        todo!()
+        match self {
+            MathNumber::Failure => None,
+            MathNumber::Integer(num) => num.abs().try_into().ok(),
+            MathNumber::Decimal(num) => Some(OwnedLiteral::LFloat(num.abs())),
+        }
     }
     fn math_floor(&self) -> Option<OwnedLiteral> {
-        todo!()
+        match self {
+            MathNumber::Failure => None,
+            MathNumber::Integer(num) => (*num).try_into().ok(),
+            MathNumber::Decimal(num) => Some(OwnedLiteral::LFloat(num.floor())),
+        }
     }
     fn math_ceil(&self) -> Option<OwnedLiteral> {
-        todo!()
+        match self {
+            MathNumber::Failure => None,
+            MathNumber::Integer(num) => (*num).try_into().ok(),
+            MathNumber::Decimal(num) => Some(OwnedLiteral::LFloat(num.ceil())),
+        }
     }
 }
 
@@ -156,25 +169,19 @@ where
     R: Into<i128>,
     F: Fn(i128, i128) -> i128,
 {
-    let result = operation(left.into(), right.into());
-    std::convert::TryInto::<u64>::try_into(result)
-        .map(OwnedLiteral::LPositiveInteger)
-        .ok()
-        .or(std::convert::TryInto::<i64>::try_into(result)
-            .map(OwnedLiteral::LNegativeInteger)
-            .ok())
+    operation(left.into(), right.into()).try_into().ok()
 }
 
-// /// For math operations that take in integers and return integers
-// /// (add, subtract, multiply)
-// fn math_floats<L, R, F>(left: L, right: R, operation: F) -> Option<OwnedLiteral>
-// where
-//     L: Into<f64>,
-//     R: Into<f64>,
-//     F: Fn(f64, f64) -> f64,
-// {
-//     let result = operation(left.into(), right.into());
-//     std::convert::TryInto::<f64>::try_into(result)
-//         .map(OwnedLiteral::LFloat)
-//         .ok()
-// }
+impl TryFrom<i128> for OwnedLiteral {
+    type Error = &'static str;
+
+    fn try_from(original: i128) -> Result<Self, Self::Error> {
+        std::convert::TryInto::<u64>::try_into(original)
+            .map(OwnedLiteral::LPositiveInteger)
+            .ok()
+            .or(std::convert::TryInto::<i64>::try_into(original)
+                .map(OwnedLiteral::LNegativeInteger)
+                .ok())
+            .ok_or("Value does not fit into either u64 or i64")
+    }
+}