15 lines
500 B
Rust
15 lines
500 B
Rust
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/// Format f64 with Python :g semantics — strip trailing zeros, no scientific notation for common values
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pub fn format_f64_g(value: f64) -> String {
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if value.is_nan() {
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return "nan".to_string();
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}
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if value.is_infinite() {
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return if value > 0.0 { "inf".to_string() } else { "-inf".to_string() };
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}
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// Use high precision then trim trailing zeros
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let s = format!("{:.15}", value);
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let s = s.trim_end_matches('0');
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s.trim_end_matches('.').to_string()
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}
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