Add chr function

timfennis · Oct 15, 2024 · c85f497 · c85f497
1 parent 9d56f2c
commit c85f497
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Showing 2 changed files with 12 additions and 1 deletion.
diff --git a/src/stdlib/string.rs b/src/stdlib/string.rs
@@ -4,7 +4,8 @@ use andy_cpp_macros::export_module;
 mod inner {
     use crate::interpreter::sequence::Sequence;
     use crate::interpreter::value::Value;
-    use anyhow::anyhow;
+
+    use anyhow::{anyhow, Context};
     use itertools::Itertools;
     use std::rc::Rc;
 
@@ -21,6 +22,12 @@ mod inner {
         Ok(res)
     }
 
+    pub fn chr(num: i64) -> anyhow::Result<String> {
+        let num = u32::try_from(num).context("this number is not a valid character")?;
+        let char = char::from_u32(num).context("this number is not a valid character")?;
+        Ok(String::from(char))
+    }
+
     // TODO: remove this function once actual slicing is supported
     pub fn slice(string: &str, i: usize, j: usize) -> anyhow::Result<String> {
         let len = string.chars().count();

diff --git a/tests/programs/602_stdlib_string/004_chr.ndct b/tests/programs/602_stdlib_string/004_chr.ndct
@@ -0,0 +1,4 @@
+--PROGRAM--
+print(chr(3486));
+--EXPECT--
+ඞ