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Make pretty printing for f16 and f128 consistent #126654

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Jun 19, 2024
Merged

Make pretty printing for f16 and f128 consistent #126654

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10 changes: 9 additions & 1 deletion compiler/rustc_middle/src/ty/print/pretty.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,7 @@ use crate::ty::{
ConstInt, Expr, ParamConst, ScalarInt, Term, TermKind, TypeFoldable, TypeSuperFoldable,
TypeSuperVisitable, TypeVisitable, TypeVisitableExt,
};
use rustc_apfloat::ieee::{Double, Single};
use rustc_apfloat::ieee::{Double, Half, Quad, Single};
use rustc_apfloat::Float;
use rustc_data_structures::fx::{FxHashMap, FxIndexMap};
use rustc_data_structures::unord::UnordMap;
Expand Down Expand Up @@ -1710,6 +1710,10 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
ty::Bool if int == ScalarInt::FALSE => p!("false"),
ty::Bool if int == ScalarInt::TRUE => p!("true"),
// Float
ty::Float(ty::FloatTy::F16) => {
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Should this be made a nested match so we get exhaustiveness checking?

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Sure, opened #127224

let val = Half::try_from(int).unwrap();
p!(write("{}{}f16", val, if val.is_finite() { "" } else { "_" }))
}
ty::Float(ty::FloatTy::F32) => {
let val = Single::try_from(int).unwrap();
p!(write("{}{}f32", val, if val.is_finite() { "" } else { "_" }))
Expand All @@ -1718,6 +1722,10 @@ pub trait PrettyPrinter<'tcx>: Printer<'tcx> + fmt::Write {
let val = Double::try_from(int).unwrap();
p!(write("{}{}f64", val, if val.is_finite() { "" } else { "_" }))
}
ty::Float(ty::FloatTy::F128) => {
let val = Quad::try_from(int).unwrap();
p!(write("{}{}f128", val, if val.is_finite() { "" } else { "_" }))
}
// Int
ty::Uint(_) | ty::Int(_) => {
let int =
Expand Down
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