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Add visualization of rustc span in doc #76668

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Sep 14, 2020
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Add visualization of rustc span in doc #76668

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20 changes: 19 additions & 1 deletion compiler/rustc_span/src/lib.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -544,6 +544,12 @@ impl Span {
}

/// Returns a `Span` that would enclose both `self` and `end`.
///
/// ```text
/// ____ ___
/// self lorem ipsum end
/// ^^^^^^^^^^^^^^^^^^^^
/// ```
pub fn to(self, end: Span) -> Span {
let span_data = self.data();
let end_data = end.data();
Expand All @@ -567,6 +573,12 @@ impl Span {
}

/// Returns a `Span` between the end of `self` to the beginning of `end`.
///
/// ```text
/// ____ ___
/// self lorem ipsum end
/// ^^^^^^^^^^^^^
/// ```
pub fn between(self, end: Span) -> Span {
let span = self.data();
let end = end.data();
Expand All @@ -577,7 +589,13 @@ impl Span {
)
}

/// Returns a `Span` between the beginning of `self` to the beginning of `end`.
/// Returns a `Span` from the beginning of `self` until the beginning of `end`.
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I use the word "until" since the function is call until, more congruence.

///
/// ```text
/// ____ ___
/// self lorem ipsum end
/// ^^^^^^^^^^^^^^^^^
/// ```
pub fn until(self, end: Span) -> Span {
let span = self.data();
let end = end.data();
Expand Down