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Add warning for undefined operator 

In practice this will probably always not typecheck, but it's a valid
parse
This commit is contained in:
greg 2018-08-19 21:40:30 -07:00
parent f00fee0e37
commit 2c298c7247
1 changed files with 6 additions and 1 deletions
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7
schala-lang/src/builtin.rs
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@ -73,7 +73,11 @@ impl BinOp {
RAngleBracket => ">",
_ => return None
};
Some(BINOPS.get(s).map(|x| x.2.clone()).expect("Custom operators not handled yet"))
let default = 10_000_000;
Some(BINOPS.get(s).map(|x| x.2.clone()).unwrap_or_else(|| {
println!("Warning: operator {} not defined", s);
default
}))
}
}
@ -128,5 +132,6 @@ lazy_static! {
"<" => (Func(bx!(Const(Nat)), bx!(Func(bx!(Const(Nat)), bx!(Const(Nat))))), (), 20),
"<=" => (Func(bx!(Const(Nat)), bx!(Func(bx!(Const(Nat)), bx!(Const(Nat))))), (), 20),
"==" => (Func(bx!(Const(Nat)), bx!(Func(bx!(Const(Nat)), bx!(Const(Nat))))), (), 20),
"=" => (Func(bx!(Const(Nat)), bx!(Func(bx!(Const(Nat)), bx!(Const(Nat))))), (), 20),
};
}