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Merged
rust-bors merged 1 commit into from
Feb 3, 2026
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Merged

more float constants #151825

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11 changes: 11 additions & 0 deletions library/core/src/num/f128.rs
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Expand Up @@ -108,6 +108,17 @@ pub mod consts {
pub const FRAC_1_SQRT_3: f128 =
0.577350269189625764509148780501957455647601751270126876018602_f128;

/// sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
// Also, #[unstable(feature = "f128", issue = "116909")]
pub const SQRT_5: f128 = 2.23606797749978969640917366873127623544061835961152572427089_f128;

/// 1/sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
// Also, #[unstable(feature = "f128", issue = "116909")]
pub const FRAC_1_SQRT_5: f128 =
0.447213595499957939281834733746255247088123671922305144854179_f128;
Comment on lines 111 to 120
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@tgross35 tgross35 Jan 30, 2026

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For f16 and f128, gate these under more_float_constants and leave the f128 gate in a comment. Bit safer since stabilizing this feature without f16/f128 would still not let you use these, but not the other way around.


/// Euler's number (e)
#[unstable(feature = "f128", issue = "116909")]
pub const E: f128 = 2.71828182845904523536028747135266249775724709369995957496697_f128;
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10 changes: 10 additions & 0 deletions library/core/src/num/f16.rs
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Expand Up @@ -103,6 +103,16 @@ pub mod consts {
// Also, #[unstable(feature = "more_float_constants", issue = "146939")]
pub const FRAC_1_SQRT_3: f16 = 0.577350269189625764509148780501957456_f16;

/// sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
// Also, #[unstable(feature = "f16", issue = "116909")]
pub const SQRT_5: f16 = 2.23606797749978969640917366873127623_f16;

/// 1/sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
// Also, #[unstable(feature = "f16", issue = "116909")]
pub const FRAC_1_SQRT_5: f16 = 0.44721359549995793928183473374625524_f16;

/// Euler's number (e)
#[unstable(feature = "f16", issue = "116909")]
pub const E: f16 = 2.71828182845904523536028747135266250_f16;
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8 changes: 8 additions & 0 deletions library/core/src/num/f32.rs
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Expand Up @@ -356,6 +356,14 @@ pub mod consts {
#[unstable(feature = "more_float_constants", issue = "146939")]
pub const FRAC_1_SQRT_3: f32 = 0.577350269189625764509148780501957456_f32;

/// sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
pub const SQRT_5: f32 = 2.23606797749978969640917366873127623_f32;

/// 1/sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
pub const FRAC_1_SQRT_5: f32 = 0.44721359549995793928183473374625524_f32;

/// Euler's number (e)
#[stable(feature = "rust1", since = "1.0.0")]
pub const E: f32 = 2.71828182845904523536028747135266250_f32;
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8 changes: 8 additions & 0 deletions library/core/src/num/f64.rs
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Expand Up @@ -356,6 +356,14 @@ pub mod consts {
#[unstable(feature = "more_float_constants", issue = "146939")]
pub const FRAC_1_SQRT_3: f64 = 0.577350269189625764509148780501957456_f64;

/// sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
pub const SQRT_5: f64 = 2.23606797749978969640917366873127623_f64;

/// 1/sqrt(5)
#[unstable(feature = "more_float_constants", issue = "146939")]
pub const FRAC_1_SQRT_5: f64 = 0.44721359549995793928183473374625524_f64;

/// Euler's number (e)
#[stable(feature = "rust1", since = "1.0.0")]
pub const E: f64 = 2.71828182845904523536028747135266250_f64;
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