code review 3050041: go/ast: use token.Pos instead of token.Position; adjus...

src/pkg/go/printer/printer.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 // The printer package implements printing of AST nodes.
 package printer
 
 import (
         "bytes"
         "fmt"
@@ skipping 1010 matching lines @@
 // A Config node controls the output of Fprint.
 type Config struct {
         Mode     uint   // default: 0
         Tabwidth int    // default: 8
         Styler   Styler // default: nil
 }
 
 
 // Fprint "pretty-prints" an AST node to output and returns the number
 // of bytes written and an error (if any) for a given configuration cfg.
+// Position information is interpreted relative to the file set fset.
 // The node type must be *ast.File, or assignment-compatible to ast.Expr,
 // ast.Decl, ast.Spec, or ast.Stmt.
 //
 func (cfg *Config) Fprint(output io.Writer, fset *token.FileSet, node interface{}) (int, os.Error) {
         // redirect output through a trimmer to eliminate trailing whitespace
         // (Input to a tabwriter must be untrimmed since trailing tabs provide
         // formatting information. The tabwriter could provide trimming
         // functionality but no tabwriter is used when RawFormat is set.)
         output = &trimmer{output: output}
 
@@ skipping 69 matching lines @@
 }
 
 
 // Fprint "pretty-prints" an AST node to output.
 // It calls Config.Fprint with default settings.
 //
 func Fprint(output io.Writer, fset *token.FileSet, node interface{}) os.Error {
         _, err := (&Config{Tabwidth: 8}).Fprint(output, fset, node) // don't care about number of bytes written
         return err
 }