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feat(minifier): minify unary plus negation. (#6203)

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resolves #6201.
It is uncertain whether this applies to other situations, so let us eliminate it in negation first, and after I have conducted a comprehensive investigation of the Closure Compiler, we can make a definitive decision.
This commit is contained in:
7086cmd 2024-10-01 07:13:39 +00:00
parent 7a381ee8f0
commit dac8f09232
1 changed files with 9 additions and 4 deletions
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13
crates/oxc_minifier/src/ast_passes/peephole_fold_constants.rs
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@ -157,9 +157,14 @@ impl<'a> PeepholeFoldConstants {
Some(ctx.ast.move_expression(&mut expr.argument))
}
// `+1` -> `1`
UnaryOperator::UnaryPlus if expr.argument.is_number() => {
Some(ctx.ast.move_expression(&mut expr.argument))
}
UnaryOperator::UnaryPlus => match &expr.argument {
Expression::UnaryExpression(unary) => {
matches!(unary.operator, UnaryOperator::UnaryNegation)
.then(|| ctx.ast.move_expression(&mut expr.argument))
}
_ if expr.argument.is_number() => Some(ctx.ast.move_expression(&mut expr.argument)),
_ => None,
},
_ => None,
}
}
@ -1276,7 +1281,7 @@ mod test {
test("a=+0", "a=0");
// test("a=+Infinity", "a=Infinity");
// test("a=+NaN", "a=NaN");
// test("a=+-7", "a=-7");
test("a=+-7", "a=-7");
// test("a=+.5", "a=.5");
// test("a=~0xffffffff", "a=0");