Truncate fractional seconds to picoseconds

Close https://github.com/alexcrichton/toml-rs/issues/186

1 files changed, 4 insertions, 1 deletions

diff --git a/src/datetime.rs b/src/datetime.rs
index f39d9fa..810a4d7 100644
--- a/src/datetime.rs
+++ b/src/datetime.rs
@@ -218,7 +218,10 @@ impl FromStr for Datetime {
                     return Err(DatetimeParseError { _private: () })
                 }
                 chars = whole[end..].chars();
-                match format!("0.{}", &whole[..end]).parse() {
+
+                // truncate to picoseconds precision
+                let last = if end > 12 { 12 } else { end };
+                match format!("0.{}", &whole[..last]).parse() {
                     Ok(f) => f,
                     Err(_) => return Err(DatetimeParseError { _private: () }),
                 }