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doc: std::env::var: Returns None for names with '=' or NUL byte #128902

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merged 2 commits into from
Aug 19, 2024
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doc: std::env::var: Returns None for names with '=' or NUL byte #128902

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doc: std::env::var: Returns None for names with '=' or NUL byte
evanj Aug 9, 2024
b0023f5
code review improvements
evanj Aug 18, 2024
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code review improvements
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@evanj
evanj committed Aug 18, 2024
commit b0023f5a417374aad980422b3f437f133676d4ef
14 changes: 5 additions & 9 deletions library/std/src/env.rs
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Expand Up @@ -198,16 +198,12 @@ impl fmt::Debug for VarsOs {
///
/// # Errors
///
/// This function returns [`VarError::NotPresent`] if the environment variable
/// isn't set.
/// Returns [`VarError::NotPresent`] if:
/// - The variable is not set.
/// - The variable's name contains an equal sign or NUL (`'='` or `'\0'`).
///
/// This function may return [`VarError::NotPresent`] if the
/// environment variable's name contains the equal sign character (`=`) or the
/// NUL character.
///
/// This function will return [`VarError::NotUnicode`] if the environment
/// variable's value is not valid Unicode. If this is not desired, consider
/// using [`var_os`].
/// Returns [`VarError::NotUnicode`] if the variable's value is not valid
/// Unicode. If this is not desired, consider using [`var_os`].
///
/// # Examples
///
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