diff --git a/compiler/rustc_ast_pretty/src/pp.rs b/compiler/rustc_ast_pretty/src/pp.rs index 11114b53220..de57820d261 100644 --- a/compiler/rustc_ast_pretty/src/pp.rs +++ b/compiler/rustc_ast_pretty/src/pp.rs @@ -176,15 +176,9 @@ impl Token { } #[derive(Copy, Clone)] -enum PrintStackBreak { +enum PrintFrame { Fits, - Broken(Breaks), -} - -#[derive(Copy, Clone)] -struct PrintStackElem { - offset: isize, - pbreak: PrintStackBreak, + Broken { offset: isize, breaks: Breaks }, } const SIZE_INFINITY: isize = 0xffff; @@ -209,7 +203,7 @@ pub struct Printer { /// advancing. scan_stack: VecDeque, /// Stack of blocks-in-progress being flushed by print - print_stack: Vec, + print_stack: Vec, /// Buffered indentation to avoid writing trailing whitespace pending_indentation: isize, /// The token most recently popped from the left boundary of the @@ -380,21 +374,19 @@ impl Printer { self.pending_indentation += amount; } - fn get_top(&self) -> PrintStackElem { - *self.print_stack.last().unwrap_or({ - &PrintStackElem { offset: 0, pbreak: PrintStackBreak::Broken(Breaks::Inconsistent) } - }) + fn get_top(&self) -> PrintFrame { + *self + .print_stack + .last() + .unwrap_or(&PrintFrame::Broken { offset: 0, breaks: Breaks::Inconsistent }) } fn print_begin(&mut self, token: BeginToken, size: isize) { if size > self.space { let col = self.margin - self.space + token.offset; - self.print_stack.push(PrintStackElem { - offset: col, - pbreak: PrintStackBreak::Broken(token.breaks), - }); + self.print_stack.push(PrintFrame::Broken { offset: col, breaks: token.breaks }); } else { - self.print_stack.push(PrintStackElem { offset: 0, pbreak: PrintStackBreak::Fits }); + self.print_stack.push(PrintFrame::Fits); } } @@ -403,20 +395,19 @@ impl Printer { } fn print_break(&mut self, token: BreakToken, size: isize) { - let top = self.get_top(); - match top.pbreak { - PrintStackBreak::Fits => { - self.space -= token.blank_space; + match self.get_top() { + PrintFrame::Fits => { self.indent(token.blank_space); + self.space -= token.blank_space; } - PrintStackBreak::Broken(Breaks::Consistent) => { - self.print_newline(top.offset + token.offset); - self.space = self.margin - (top.offset + token.offset); + PrintFrame::Broken { offset, breaks: Breaks::Consistent } => { + self.print_newline(offset + token.offset); + self.space = self.margin - (offset + token.offset); } - PrintStackBreak::Broken(Breaks::Inconsistent) => { + PrintFrame::Broken { offset, breaks: Breaks::Inconsistent } => { if size > self.space { - self.print_newline(top.offset + token.offset); - self.space = self.margin - (top.offset + token.offset); + self.print_newline(offset + token.offset); + self.space = self.margin - (offset + token.offset); } else { self.indent(token.blank_space); self.space -= token.blank_space;