Factor convenience functions out of main printer implementation

compiler/rustc_ast_pretty/src/pp.rs

@@ -132,6 +132,7 @@
 //! methods called `Printer::scan_*`, and the 'PRINT' process is the
 //! method called `Printer::print`.
 
+mod convenience;
 mod ring;
 
 use ring::RingBuffer;
@@ -185,12 +186,6 @@ pub enum Token {
     End,
 }
 
-impl Token {
-    pub fn is_hardbreak_tok(&self) -> bool {
-        matches!(self, Token::Break(BreakToken { offset: 0, blank_space: SIZE_INFINITY }))
-    }
-}
-
 #[derive(Copy, Clone)]
 enum PrintFrame {
     Fits,
@@ -439,73 +434,4 @@ fn print_string(&mut self, string: &str) {
         self.out.push_str(string);
         self.space -= string.len() as isize;
     }
-
-    // Convenience functions to talk to the printer.
-
-    /// "raw box"
-    pub fn rbox(&mut self, indent: usize, breaks: Breaks) {
-        self.scan_begin(BeginToken {
-            indent: IndentStyle::Block { offset: indent as isize },
-            breaks,
-        })
-    }
-
-    /// Inconsistent breaking box
-    pub fn ibox(&mut self, indent: usize) {
-        self.rbox(indent, Breaks::Inconsistent)
-    }
-
-    /// Consistent breaking box
-    pub fn cbox(&mut self, indent: usize) {
-        self.rbox(indent, Breaks::Consistent)
-    }
-
-    pub fn visual_align(&mut self) {
-        self.scan_begin(BeginToken { indent: IndentStyle::Visual, breaks: Breaks::Consistent });
-    }
-
-    pub fn break_offset(&mut self, n: usize, off: isize) {
-        self.scan_break(BreakToken { offset: off, blank_space: n as isize })
-    }
-
-    pub fn end(&mut self) {
-        self.scan_end()
-    }
-
-    pub fn eof(mut self) -> String {
-        self.scan_eof();
-        self.out
-    }
-
-    pub fn word<S: Into<Cow<'static, str>>>(&mut self, wrd: S) {
-        let string = wrd.into();
-        self.scan_string(string)
-    }
-
-    fn spaces(&mut self, n: usize) {
-        self.break_offset(n, 0)
-    }
-
-    pub fn zerobreak(&mut self) {
-        self.spaces(0)
-    }
-
-    pub fn space(&mut self) {
-        self.spaces(1)
-    }
-
-    pub fn hardbreak(&mut self) {
-        self.spaces(SIZE_INFINITY as usize)
-    }
-
-    pub fn is_beginning_of_line(&self) -> bool {
-        match self.last_token() {
-            Some(last_token) => last_token.is_hardbreak_tok(),
-            None => true,
-        }
-    }
-
-    pub fn hardbreak_tok_offset(off: isize) -> Token {
-        Token::Break(BreakToken { offset: off, blank_space: SIZE_INFINITY })
-    }
 }

compiler/rustc_ast_pretty/src/pp/convenience.rs

@@ -0,0 +1,77 @@
+use crate::pp::{BeginToken, BreakToken, Breaks, IndentStyle, Printer, Token, SIZE_INFINITY};
+use std::borrow::Cow;
+
+impl Printer {
+    /// "raw box"
+    pub fn rbox(&mut self, indent: usize, breaks: Breaks) {
+        self.scan_begin(BeginToken {
+            indent: IndentStyle::Block { offset: indent as isize },
+            breaks,
+        })
+    }
+
+    /// Inconsistent breaking box
+    pub fn ibox(&mut self, indent: usize) {
+        self.rbox(indent, Breaks::Inconsistent)
+    }
+
+    /// Consistent breaking box
+    pub fn cbox(&mut self, indent: usize) {
+        self.rbox(indent, Breaks::Consistent)
+    }
+
+    pub fn visual_align(&mut self) {
+        self.scan_begin(BeginToken { indent: IndentStyle::Visual, breaks: Breaks::Consistent });
+    }
+
+    pub fn break_offset(&mut self, n: usize, off: isize) {
+        self.scan_break(BreakToken { offset: off, blank_space: n as isize })
+    }
+
+    pub fn end(&mut self) {
+        self.scan_end()
+    }
+
+    pub fn eof(mut self) -> String {
+        self.scan_eof();
+        self.out
+    }
+
+    pub fn word<S: Into<Cow<'static, str>>>(&mut self, wrd: S) {
+        let string = wrd.into();
+        self.scan_string(string)
+    }
+
+    fn spaces(&mut self, n: usize) {
+        self.break_offset(n, 0)
+    }
+
+    pub fn zerobreak(&mut self) {
+        self.spaces(0)
+    }
+
+    pub fn space(&mut self) {
+        self.spaces(1)
+    }
+
+    pub fn hardbreak(&mut self) {
+        self.spaces(SIZE_INFINITY as usize)
+    }
+
+    pub fn is_beginning_of_line(&self) -> bool {
+        match self.last_token() {
+            Some(last_token) => last_token.is_hardbreak_tok(),
+            None => true,
+        }
+    }
+
+    pub fn hardbreak_tok_offset(off: isize) -> Token {
+        Token::Break(BreakToken { offset: off, blank_space: SIZE_INFINITY })
+    }
+}
+
+impl Token {
+    pub fn is_hardbreak_tok(&self) -> bool {
+        matches!(self, Token::Break(BreakToken { offset: 0, blank_space: SIZE_INFINITY }))
+    }
+}