greg
/
schala
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Prefix ops

This commit is contained in:
greg 2018-05-11 01:46:42 -07:00
parent 4d5ab95946
commit b4a16cdc55
1 changed files with 10 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
schala-lang/src/eval.rs
View File

@ -388,6 +388,7 @@ impl<'a> State<'a> {
let evaled_args = evaled_args?;
Ok(match (name.as_str(), evaled_args.as_slice()) {
/* binops */
("+", &[Lit(Nat(l)), Lit(Nat(r))]) => Lit(Nat(l + r)),
("++", &[Lit(StringLit(ref s1)), Lit(StringLit(ref s2))]) => Lit(StringLit(Rc::new(format!("{}{}", s1, s2)))),
("-", &[Lit(Nat(l)), Lit(Nat(r))]) => Lit(Nat(l - r)),
@ -402,6 +403,15 @@ impl<'a> State<'a> {
("^", &[Lit(Nat(l)), Lit(Nat(r))]) => Lit(Nat(l ^ r)),
("&", &[Lit(Nat(l)), Lit(Nat(r))]) => Lit(Nat(l & r)),
("|", &[Lit(Nat(l)), Lit(Nat(r))]) => Lit(Nat(l | r)),
/* prefix ops */
("!", &[Lit(Bool(true))]) => Lit(Bool(false)),
("!", &[Lit(Bool(false))]) => Lit(Bool(true)),
("-", &[Lit(Nat(n))]) => Lit(Int(-1*(n as i64))),
("-", &[Lit(Int(n))]) => Lit(Int(-1*(n as i64))),
("+", &[Lit(Int(n))]) => Lit(Int(n)),
("+", &[Lit(Nat(n))]) => Lit(Nat(n)),
_ => return Err(format!("Runtime error: not yet implemented")),
})
}