Refactor methods onto Printer struct.

No (intentional) changes to behavior. This is intended to avoid the
anti-pattern of having to import individual methods throughout code.

src/librustc/middle/dataflow.rs

@@ -21,7 +21,6 @@ use std::io;
 use std::mem;
 use std::usize;
 use syntax::ast;
-use syntax::print::pp;
 use syntax::print::pprust::PrintState;
 use util::nodemap::NodeMap;
 use hir;
@@ -157,7 +156,7 @@ impl<'a, 'tcx, O:DataFlowOperator> pprust::PpAnn for DataFlowContext<'a, 'tcx, O
             ps.synth_comment(
                 format!("id {}: {}{}{}{}", id, entry_str,
                         gens_str, action_kills_str, scope_kills_str))?;
-            pp::space(&mut ps.s)?;
+            ps.s.space()?;
         }
         Ok(())
     }

src/librustc_driver/pretty.rs

@@ -30,7 +30,7 @@ use rustc_mir::util::{write_mir_pretty, write_mir_graphviz};
 
 use syntax::ast::{self, BlockCheckMode};
 use syntax::fold::{self, Folder};
-use syntax::print::{pp, pprust};
+use syntax::print::{pprust};
 use syntax::print::pprust::PrintState;
 use syntax::ptr::P;
 use syntax::util::small_vector::SmallVector;
@@ -357,24 +357,24 @@ impl<'hir> pprust::PpAnn for IdentifiedAnnotation<'hir> {
             pprust::NodeName(_) => Ok(()),
 
             pprust::NodeItem(item) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(item.id.to_string())
             }
             pprust::NodeSubItem(id) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(id.to_string())
             }
             pprust::NodeBlock(blk) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(format!("block {}", blk.id))
             }
             pprust::NodeExpr(expr) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(expr.id.to_string())?;
                 s.pclose()
             }
             pprust::NodePat(pat) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(format!("pat {}", pat.id))
             }
         }
@@ -414,24 +414,24 @@ impl<'hir> pprust_hir::PpAnn for IdentifiedAnnotation<'hir> {
         match node {
             pprust_hir::NodeName(_) => Ok(()),
             pprust_hir::NodeItem(item) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(item.id.to_string())
             }
             pprust_hir::NodeSubItem(id) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(id.to_string())
             }
             pprust_hir::NodeBlock(blk) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(format!("block {}", blk.id))
             }
             pprust_hir::NodeExpr(expr) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(expr.id.to_string())?;
                 s.pclose()
             }
             pprust_hir::NodePat(pat) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(format!("pat {}", pat.id))
             }
         }
@@ -456,13 +456,13 @@ impl<'a> pprust::PpAnn for HygieneAnnotation<'a> {
     fn post(&self, s: &mut pprust::State, node: pprust::AnnNode) -> io::Result<()> {
         match node {
             pprust::NodeIdent(&ast::Ident { name, ctxt }) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 // FIXME #16420: this doesn't display the connections
                 // between syntax contexts
                 s.synth_comment(format!("{}{:?}", name.as_u32(), ctxt))
             }
             pprust::NodeName(&name) => {
-                pp::space(&mut s.s)?;
+                s.s.space()?;
                 s.synth_comment(name.as_u32().to_string())
             }
             _ => Ok(()),
@@ -514,10 +514,10 @@ impl<'a, 'tcx> pprust_hir::PpAnn for TypedAnnotation<'a, 'tcx> {
     fn post(&self, s: &mut pprust_hir::State, node: pprust_hir::AnnNode) -> io::Result<()> {
         match node {
             pprust_hir::NodeExpr(expr) => {
-                pp::space(&mut s.s)?;
-                pp::word(&mut s.s, "as")?;
-                pp::space(&mut s.s)?;
-                pp::word(&mut s.s, &self.tables.get().expr_ty(expr).to_string())?;
+                s.s.space()?;
+                s.s.word("as")?;
+                s.s.space()?;
+                s.s.word(&self.tables.get().expr_ty(expr).to_string())?;
                 s.pclose()
             }
             _ => Ok(()),
@@ -945,13 +945,13 @@ pub fn print_after_hir_lowering<'tcx, 'a: 'tcx>(sess: &'a Session,
                     for node_id in uii.all_matching_node_ids(hir_map) {
                         let node = hir_map.get(node_id);
                         pp_state.print_node(node)?;
-                        pp::space(&mut pp_state.s)?;
+                        pp_state.s.space()?;
                         let path = annotation.node_path(node_id)
                             .expect("--unpretty missing node paths");
                         pp_state.synth_comment(path)?;
-                        pp::hardbreak(&mut pp_state.s)?;
+                        pp_state.s.hardbreak()?;
                     }
-                    pp::eof(&mut pp_state.s)
+                    pp_state.s.eof()
                 })
             }
             _ => unreachable!(),

src/libsyntax/parse/parser.rs

@@ -1480,10 +1480,9 @@ impl<'a> Parser<'a> {
         match ty.node {
             TyKind::Rptr(ref lifetime, ref mut_ty) => {
                 let sum_with_parens = pprust::to_string(|s| {
-                    use print::pp::word;
                     use print::pprust::PrintState;
 
-                    word(&mut s.s, "&")?;
+                    s.s.word("&")?;
                     s.print_opt_lifetime(lifetime)?;
                     s.print_mutability(mut_ty.mutbl)?;
                     s.popen()?;
@@ -2542,14 +2541,13 @@ impl<'a> Parser<'a> {
                         };
                         let sugg = pprust::to_string(|s| {
                             use print::pprust::PrintState;
-                            use print::pp::word;
                             s.popen()?;
                             s.print_expr(&e)?;
-                            word(&mut s.s, ".")?;
+                            s.s.word( ".")?;
                             s.print_usize(float.trunc() as usize)?;
                             s.pclose()?;
-                            word(&mut s.s, ".")?;
-                            word(&mut s.s, fstr.splitn(2, ".").last().unwrap())
+                            s.s.word(".")?;
+                            s.s.word(fstr.splitn(2, ".").last().unwrap())
                         });
                         err.span_suggestion(
                             lo.to(self.prev_span),

src/libsyntax/print/pp.rs

@@ -262,7 +262,7 @@ pub fn mk_printer<'a>(out: Box<io::Write+'a>, linewidth: usize) -> Printer<'a> {
 }
 
 pub struct Printer<'a> {
-    pub out: Box<io::Write+'a>,
+    out: Box<io::Write+'a>,
     buf_len: usize,
     /// Width of lines we're constrained to
     margin: isize,
@@ -577,75 +577,75 @@ impl<'a> Printer<'a> {
           }
         }
     }
-}
 
-// Convenience functions to talk to the printer.
+    // Convenience functions to talk to the printer.
 
-/// "raw box"
-pub fn rbox(p: &mut Printer, indent: usize, b: Breaks) -> io::Result<()> {
-    p.pretty_print(Token::Begin(BeginToken {
-        offset: indent as isize,
-        breaks: b
-    }))
-}
+    /// "raw box"
+    pub fn rbox(&mut self, indent: usize, b: Breaks) -> io::Result<()> {
+        self.pretty_print(Token::Begin(BeginToken {
+            offset: indent as isize,
+            breaks: b
+        }))
+    }
 
-/// Inconsistent breaking box
-pub fn ibox(p: &mut Printer, indent: usize) -> io::Result<()> {
-    rbox(p, indent, Breaks::Inconsistent)
-}
+    /// Inconsistent breaking box
+    pub fn ibox(&mut self, indent: usize) -> io::Result<()> {
+        self.rbox(indent, Breaks::Inconsistent)
+    }
 
-/// Consistent breaking box
-pub fn cbox(p: &mut Printer, indent: usize) -> io::Result<()> {
-    rbox(p, indent, Breaks::Consistent)
-}
+    /// Consistent breaking box
+    pub fn cbox(&mut self, indent: usize) -> io::Result<()> {
+        self.rbox(indent, Breaks::Consistent)
+    }
 
-pub fn break_offset(p: &mut Printer, n: usize, off: isize) -> io::Result<()> {
-    p.pretty_print(Token::Break(BreakToken {
-        offset: off,
-        blank_space: n as isize
-    }))
-}
+    pub fn break_offset(&mut self, n: usize, off: isize) -> io::Result<()> {
+        self.pretty_print(Token::Break(BreakToken {
+            offset: off,
+            blank_space: n as isize
+        }))
+    }
 
-pub fn end(p: &mut Printer) -> io::Result<()> {
-    p.pretty_print(Token::End)
-}
+    pub fn end(&mut self) -> io::Result<()> {
+        self.pretty_print(Token::End)
+    }
 
-pub fn eof(p: &mut Printer) -> io::Result<()> {
-    p.pretty_print(Token::Eof)
-}
+    pub fn eof(&mut self) -> io::Result<()> {
+        self.pretty_print(Token::Eof)
+    }
 
-pub fn word(p: &mut Printer, wrd: &str) -> io::Result<()> {
-    p.pretty_print(Token::String(wrd.to_string(), wrd.len() as isize))
-}
+    pub fn word(&mut self, wrd: &str) -> io::Result<()> {
+        self.pretty_print(Token::String(wrd.to_string(), wrd.len() as isize))
+    }
 
-pub fn huge_word(p: &mut Printer, wrd: &str) -> io::Result<()> {
-    p.pretty_print(Token::String(wrd.to_string(), SIZE_INFINITY))
-}
+    pub fn huge_word(&mut self, wrd: &str) -> io::Result<()> {
+        self.pretty_print(Token::String(wrd.to_string(), SIZE_INFINITY))
+    }
 
-pub fn zero_word(p: &mut Printer, wrd: &str) -> io::Result<()> {
-    p.pretty_print(Token::String(wrd.to_string(), 0))
-}
+    pub fn zero_word(&mut self, wrd: &str) -> io::Result<()> {
+        self.pretty_print(Token::String(wrd.to_string(), 0))
+    }
 
-pub fn spaces(p: &mut Printer, n: usize) -> io::Result<()> {
-    break_offset(p, n, 0)
-}
+    fn spaces(&mut self, n: usize) -> io::Result<()> {
+        self.break_offset(n, 0)
+    }
 
-pub fn zerobreak(p: &mut Printer) -> io::Result<()> {
-    spaces(p, 0)
-}
+    pub fn zerobreak(&mut self) -> io::Result<()> {
+        self.spaces(0)
+    }
 
-pub fn space(p: &mut Printer) -> io::Result<()> {
-    spaces(p, 1)
-}
+    pub fn space(&mut self) -> io::Result<()> {
+        self.spaces(1)
+    }
 
-pub fn hardbreak(p: &mut Printer) -> io::Result<()> {
-    spaces(p, SIZE_INFINITY as usize)
-}
+    pub fn hardbreak(&mut self) -> io::Result<()> {
+        self.spaces(SIZE_INFINITY as usize)
+    }
 
-pub fn hardbreak_tok_offset(off: isize) -> Token {
-    Token::Break(BreakToken {offset: off, blank_space: SIZE_INFINITY})
-}
+    pub fn hardbreak_tok_offset(off: isize) -> Token {
+        Token::Break(BreakToken {offset: off, blank_space: SIZE_INFINITY})
+    }
 
-pub fn hardbreak_tok() -> Token {
-    hardbreak_tok_offset(0)
+    pub fn hardbreak_tok() -> Token {
+        Self::hardbreak_tok_offset(0)
+    }
 }