From 46fcf485140bfd3f6d8576d3996770615aef29f0 Mon Sep 17 00:00:00 2001
From: Rose Hogenson <rosehogenson@posteo.net>
Date: Fri, 31 May 2024 11:23:32 -0700
Subject: Add a README

---
 src/eval.rs   | 7 +++++++
 src/op.rs     | 2 ++
 src/parser.rs | 4 ++++
 3 files changed, 13 insertions(+)

(limited to 'src')

diff --git a/src/eval.rs b/src/eval.rs
index a72f271..e40743b 100644
--- a/src/eval.rs
+++ b/src/eval.rs
@@ -179,6 +179,13 @@ impl Num {
         }
     }
 
+    pub fn trunc(self) -> Num {
+        match self {
+            Int(i) => Int(i),
+            Float(f) => Int(f as i128),
+        }
+    }
+
     pub fn abs(self) -> Num {
         match self {
             Int(i) => Int(i.abs()),
diff --git a/src/op.rs b/src/op.rs
index 6a2d00f..b2f2a3f 100644
--- a/src/op.rs
+++ b/src/op.rs
@@ -16,6 +16,7 @@ pub enum UnOp {
     Floor,
     Ceil,
     Round,
+    Trunc,
     Abs,
 }
 
@@ -36,6 +37,7 @@ impl UnOp {
             UnOp::Floor => x.floor(),
             UnOp::Ceil => x.ceil(),
             UnOp::Round => x.round(),
+            UnOp::Trunc => x.trunc(),
             UnOp::Abs => x.abs(),
         }
     }
diff --git a/src/parser.rs b/src/parser.rs
index a31b4f9..1e271a4 100644
--- a/src/parser.rs
+++ b/src/parser.rs
@@ -130,6 +130,10 @@ impl<'a> Parser<'a> {
             self.stack.push(Pending::Un(UnOp::Round));
             return true;
         }
+        if self.symbol("trunc") {
+            self.stack.push(Pending::Un(UnOp::Trunc));
+            return true;
+        }
         if self.symbol("abs") {
             self.stack.push(Pending::Un(UnOp::Abs));
             return true;
-- 
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