mirror of
https://github.com/rust-lang/rust-clippy
synced 2024-11-27 07:00:55 +00:00
92 lines
3.1 KiB
Rust
92 lines
3.1 KiB
Rust
#![allow(plugin_as_library)]
|
|
#![feature(rustc_private)]
|
|
|
|
extern crate clippy;
|
|
extern crate rustc;
|
|
extern crate rustc_const_eval;
|
|
extern crate rustc_const_math;
|
|
extern crate syntax;
|
|
|
|
use clippy::consts::{constant_simple, Constant, FloatWidth};
|
|
use rustc_const_math::ConstInt;
|
|
use rustc::hir::*;
|
|
use syntax::ast::{LitIntType, LitKind, StrStyle};
|
|
use syntax::codemap::{Spanned, COMMAND_LINE_SP};
|
|
use syntax::parse::token::InternedString;
|
|
use syntax::ptr::P;
|
|
|
|
fn spanned<T>(t: T) -> Spanned<T> {
|
|
Spanned {
|
|
node: t,
|
|
span: COMMAND_LINE_SP,
|
|
}
|
|
}
|
|
|
|
fn expr(n: Expr_) -> Expr {
|
|
Expr {
|
|
id: 1,
|
|
node: n,
|
|
span: COMMAND_LINE_SP,
|
|
attrs: None,
|
|
}
|
|
}
|
|
|
|
fn lit(l: LitKind) -> Expr {
|
|
expr(ExprLit(P(spanned(l))))
|
|
}
|
|
|
|
fn binop(op: BinOp_, l: Expr, r: Expr) -> Expr {
|
|
expr(ExprBinary(spanned(op), P(l), P(r)))
|
|
}
|
|
|
|
fn check(expect: Constant, expr: &Expr) {
|
|
assert_eq!(Some(expect), constant_simple(expr))
|
|
}
|
|
|
|
const TRUE: Constant = Constant::Bool(true);
|
|
const FALSE: Constant = Constant::Bool(false);
|
|
const ZERO: Constant = Constant::Int(ConstInt::Infer(0));
|
|
const ONE: Constant = Constant::Int(ConstInt::Infer(1));
|
|
const TWO: Constant = Constant::Int(ConstInt::Infer(2));
|
|
|
|
#[test]
|
|
fn test_lit() {
|
|
check(TRUE, &lit(LitKind::Bool(true)));
|
|
check(FALSE, &lit(LitKind::Bool(false)));
|
|
check(ZERO, &lit(LitKind::Int(0, LitIntType::Unsuffixed)));
|
|
check(Constant::Str("cool!".into(), StrStyle::Cooked),
|
|
&lit(LitKind::Str(InternedString::new("cool!"), StrStyle::Cooked)));
|
|
}
|
|
|
|
#[test]
|
|
fn test_ops() {
|
|
check(TRUE, &binop(BiOr, lit(LitKind::Bool(false)), lit(LitKind::Bool(true))));
|
|
check(FALSE, &binop(BiAnd, lit(LitKind::Bool(false)), lit(LitKind::Bool(true))));
|
|
|
|
let litzero = lit(LitKind::Int(0, LitIntType::Unsuffixed));
|
|
let litone = lit(LitKind::Int(1, LitIntType::Unsuffixed));
|
|
check(TRUE, &binop(BiEq, litzero.clone(), litzero.clone()));
|
|
check(TRUE, &binop(BiGe, litzero.clone(), litzero.clone()));
|
|
check(TRUE, &binop(BiLe, litzero.clone(), litzero.clone()));
|
|
check(FALSE, &binop(BiNe, litzero.clone(), litzero.clone()));
|
|
check(FALSE, &binop(BiGt, litzero.clone(), litzero.clone()));
|
|
check(FALSE, &binop(BiLt, litzero.clone(), litzero.clone()));
|
|
|
|
check(ZERO, &binop(BiAdd, litzero.clone(), litzero.clone()));
|
|
check(TWO, &binop(BiAdd, litone.clone(), litone.clone()));
|
|
check(ONE, &binop(BiSub, litone.clone(), litzero.clone()));
|
|
check(ONE, &binop(BiMul, litone.clone(), litone.clone()));
|
|
check(ONE, &binop(BiDiv, litone.clone(), litone.clone()));
|
|
|
|
let half_any = Constant::Float("0.5".into(), FloatWidth::Any);
|
|
let half32 = Constant::Float("0.5".into(), FloatWidth::F32);
|
|
let half64 = Constant::Float("0.5".into(), FloatWidth::F64);
|
|
|
|
assert_eq!(half_any, half32);
|
|
assert_eq!(half_any, half64);
|
|
assert_eq!(half32, half64); // for transitivity
|
|
|
|
assert_eq!(Constant::Int(ConstInt::Infer(0)), Constant::Int(ConstInt::U8(0)));
|
|
assert_eq!(Constant::Int(ConstInt::Infer(0)), Constant::Int(ConstInt::I8(0)));
|
|
assert_eq!(Constant::Int(ConstInt::InferSigned(-1)), Constant::Int(ConstInt::I8(-1)));
|
|
}
|