1 files changed, 0 insertions, 436 deletions
diff --git a/src/pkg/exp/template/parse/parse.go b/src/pkg/exp/template/parse/parse.go
deleted file mode 100644
index f8f9023e5..000000000
--- a/src/pkg/exp/template/parse/parse.go
+++ /dev/null
@@ -1,436 +0,0 @@
-// Copyright 2011 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.
-
-// Package parse builds parse trees for templates.  The grammar is defined
-// in the documents for the exp/template package.
-package parse
-
-import (
-	"fmt"
-	"os"
-	"runtime"
-	"strconv"
-	"unicode"
-)
-
-// Tree is the representation of a parsed template.
-type Tree struct {
-	Name string    // Name is the name of the template.
-	Root *ListNode // Root is the top-level root of the parse tree.
-	// Parsing only; cleared after parse.
-	funcs     []map[string]interface{}
-	lex       *lexer
-	token     [2]item // two-token lookahead for parser.
-	peekCount int
-	vars      []string // variables defined at the moment.
-}
-
-// next returns the next token.
-func (t *Tree) next() item {
-	if t.peekCount > 0 {
-		t.peekCount--
-	} else {
-		t.token[0] = t.lex.nextItem()
-	}
-	return t.token[t.peekCount]
-}
-
-// backup backs the input stream up one token.
-func (t *Tree) backup() {
-	t.peekCount++
-}
-
-// backup2 backs the input stream up two tokens
-func (t *Tree) backup2(t1 item) {
-	t.token[1] = t1
-	t.peekCount = 2
-}
-
-// peek returns but does not consume the next token.
-func (t *Tree) peek() item {
-	if t.peekCount > 0 {
-		return t.token[t.peekCount-1]
-	}
-	t.peekCount = 1
-	t.token[0] = t.lex.nextItem()
-	return t.token[0]
-}
-
-// Parsing.
-
-// New allocates a new template with the given name.
-func New(name string, funcs ...map[string]interface{}) *Tree {
-	return &Tree{
-		Name:  name,
-		funcs: funcs,
-	}
-}
-
-// errorf formats the error and terminates processing.
-func (t *Tree) errorf(format string, args ...interface{}) {
-	t.Root = nil
-	format = fmt.Sprintf("template: %s:%d: %s", t.Name, t.lex.lineNumber(), format)
-	panic(fmt.Errorf(format, args...))
-}
-
-// error terminates processing.
-func (t *Tree) error(err os.Error) {
-	t.errorf("%s", err)
-}
-
-// expect consumes the next token and guarantees it has the required type.
-func (t *Tree) expect(expected itemType, context string) item {
-	token := t.next()
-	if token.typ != expected {
-		t.errorf("expected %s in %s; got %s", expected, context, token)
-	}
-	return token
-}
-
-// unexpected complains about the token and terminates processing.
-func (t *Tree) unexpected(token item, context string) {
-	t.errorf("unexpected %s in %s", token, context)
-}
-
-// recover is the handler that turns panics into returns from the top level of Parse.
-func (t *Tree) recover(errp *os.Error) {
-	e := recover()
-	if e != nil {
-		if _, ok := e.(runtime.Error); ok {
-			panic(e)
-		}
-		if t != nil {
-			t.stopParse()
-		}
-		*errp = e.(os.Error)
-	}
-	return
-}
-
-// startParse starts the template parsing from the lexer.
-func (t *Tree) startParse(funcs []map[string]interface{}, lex *lexer) {
-	t.Root = nil
-	t.lex = lex
-	t.vars = []string{"$"}
-	t.funcs = funcs
-}
-
-// stopParse terminates parsing.
-func (t *Tree) stopParse() {
-	t.lex = nil
-	t.vars = nil
-	t.funcs = nil
-}
-
-// atEOF returns true if, possibly after spaces, we're at EOF.
-func (t *Tree) atEOF() bool {
-	for {
-		token := t.peek()
-		switch token.typ {
-		case itemEOF:
-			return true
-		case itemText:
-			for _, r := range token.val {
-				if !unicode.IsSpace(r) {
-					return false
-				}
-			}
-			t.next() // skip spaces.
-			continue
-		}
-		break
-	}
-	return false
-}
-
-// Parse parses the template definition string to construct an internal
-// representation of the template for execution.
-func (t *Tree) Parse(s string, funcs ...map[string]interface{}) (tree *Tree, err os.Error) {
-	defer t.recover(&err)
-	t.startParse(funcs, lex(t.Name, s))
-	t.parse(true)
-	t.stopParse()
-	return t, nil
-}
-
-// parse is the helper for Parse.
-// It triggers an error if we expect EOF but don't reach it.
-func (t *Tree) parse(toEOF bool) (next Node) {
-	t.Root, next = t.itemList(true)
-	if toEOF && next != nil {
-		t.errorf("unexpected %s", next)
-	}
-	return next
-}
-
-// itemList:
-//	textOrAction*
-// Terminates at EOF and at {{end}} or {{else}}, which is returned separately.
-// The toEOF flag tells whether we expect to reach EOF.
-func (t *Tree) itemList(toEOF bool) (list *ListNode, next Node) {
-	list = newList()
-	for t.peek().typ != itemEOF {
-		n := t.textOrAction()
-		switch n.Type() {
-		case NodeEnd, NodeElse:
-			return list, n
-		}
-		list.append(n)
-	}
-	if !toEOF {
-		t.unexpected(t.next(), "input")
-	}
-	return list, nil
-}
-
-// textOrAction:
-//	text | action
-func (t *Tree) textOrAction() Node {
-	switch token := t.next(); token.typ {
-	case itemText:
-		return newText(token.val)
-	case itemLeftDelim:
-		return t.action()
-	default:
-		t.unexpected(token, "input")
-	}
-	return nil
-}
-
-// Action:
-//	control
-//	command ("|" command)*
-// Left delim is past. Now get actions.
-// First word could be a keyword such as range.
-func (t *Tree) action() (n Node) {
-	switch token := t.next(); token.typ {
-	case itemElse:
-		return t.elseControl()
-	case itemEnd:
-		return t.endControl()
-	case itemIf:
-		return t.ifControl()
-	case itemRange:
-		return t.rangeControl()
-	case itemTemplate:
-		return t.templateControl()
-	case itemWith:
-		return t.withControl()
-	}
-	t.backup()
-	// Do not pop variables; they persist until "end".
-	return newAction(t.lex.lineNumber(), t.pipeline("command"))
-}
-
-// Pipeline:
-//	field or command
-//	pipeline "|" pipeline
-func (t *Tree) pipeline(context string) (pipe *PipeNode) {
-	var decl []*VariableNode
-	// Are there declarations?
-	for {
-		if v := t.peek(); v.typ == itemVariable {
-			t.next()
-			if next := t.peek(); next.typ == itemColonEquals || next.typ == itemChar {
-				t.next()
-				variable := newVariable(v.val)
-				if len(variable.Ident) != 1 {
-					t.errorf("illegal variable in declaration: %s", v.val)
-				}
-				decl = append(decl, variable)
-				t.vars = append(t.vars, v.val)
-				if next.typ == itemChar && next.val == "," {
-					if context == "range" && len(decl) < 2 {
-						continue
-					}
-					t.errorf("too many declarations in %s", context)
-				}
-			} else {
-				t.backup2(v)
-			}
-		}
-		break
-	}
-	pipe = newPipeline(t.lex.lineNumber(), decl)
-	for {
-		switch token := t.next(); token.typ {
-		case itemRightDelim:
-			if len(pipe.Cmds) == 0 {
-				t.errorf("missing value for %s", context)
-			}
-			return
-		case itemBool, itemCharConstant, itemComplex, itemDot, itemField, itemIdentifier,
-			itemVariable, itemNumber, itemRawString, itemString:
-			t.backup()
-			pipe.append(t.command())
-		default:
-			t.unexpected(token, context)
-		}
-	}
-	return
-}
-
-func (t *Tree) parseControl(context string) (lineNum int, pipe *PipeNode, list, elseList *ListNode) {
-	lineNum = t.lex.lineNumber()
-	defer t.popVars(len(t.vars))
-	pipe = t.pipeline(context)
-	var next Node
-	list, next = t.itemList(false)
-	switch next.Type() {
-	case NodeEnd: //done
-	case NodeElse:
-		elseList, next = t.itemList(false)
-		if next.Type() != NodeEnd {
-			t.errorf("expected end; found %s", next)
-		}
-		elseList = elseList
-	}
-	return lineNum, pipe, list, elseList
-}
-
-// If:
-//	{{if pipeline}} itemList {{end}}
-//	{{if pipeline}} itemList {{else}} itemList {{end}}
-// If keyword is past.
-func (t *Tree) ifControl() Node {
-	return newIf(t.parseControl("if"))
-}
-
-// Range:
-//	{{range pipeline}} itemList {{end}}
-//	{{range pipeline}} itemList {{else}} itemList {{end}}
-// Range keyword is past.
-func (t *Tree) rangeControl() Node {
-	return newRange(t.parseControl("range"))
-}
-
-// With:
-//	{{with pipeline}} itemList {{end}}
-//	{{with pipeline}} itemList {{else}} itemList {{end}}
-// If keyword is past.
-func (t *Tree) withControl() Node {
-	return newWith(t.parseControl("with"))
-}
-
-// End:
-//	{{end}}
-// End keyword is past.
-func (t *Tree) endControl() Node {
-	t.expect(itemRightDelim, "end")
-	return newEnd()
-}
-
-// Else:
-//	{{else}}
-// Else keyword is past.
-func (t *Tree) elseControl() Node {
-	t.expect(itemRightDelim, "else")
-	return newElse(t.lex.lineNumber())
-}
-
-// Template:
-//	{{template stringValue pipeline}}
-// Template keyword is past.  The name must be something that can evaluate
-// to a string.
-func (t *Tree) templateControl() Node {
-	var name string
-	switch token := t.next(); token.typ {
-	case itemString, itemRawString:
-		s, err := strconv.Unquote(token.val)
-		if err != nil {
-			t.error(err)
-		}
-		name = s
-	default:
-		t.unexpected(token, "template invocation")
-	}
-	var pipe *PipeNode
-	if t.next().typ != itemRightDelim {
-		t.backup()
-		// Do not pop variables; they persist until "end".
-		pipe = t.pipeline("template")
-	}
-	return newTemplate(t.lex.lineNumber(), name, pipe)
-}
-
-// command:
-// space-separated arguments up to a pipeline character or right delimiter.
-// we consume the pipe character but leave the right delim to terminate the action.
-func (t *Tree) command() *CommandNode {
-	cmd := newCommand()
-Loop:
-	for {
-		switch token := t.next(); token.typ {
-		case itemRightDelim:
-			t.backup()
-			break Loop
-		case itemPipe:
-			break Loop
-		case itemError:
-			t.errorf("%s", token.val)
-		case itemIdentifier:
-			if !t.hasFunction(token.val) {
-				t.errorf("function %q not defined", token.val)
-			}
-			cmd.append(newIdentifier(token.val))
-		case itemDot:
-			cmd.append(newDot())
-		case itemVariable:
-			cmd.append(t.useVar(token.val))
-		case itemField:
-			cmd.append(newField(token.val))
-		case itemBool:
-			cmd.append(newBool(token.val == "true"))
-		case itemCharConstant, itemComplex, itemNumber:
-			number, err := newNumber(token.val, token.typ)
-			if err != nil {
-				t.error(err)
-			}
-			cmd.append(number)
-		case itemString, itemRawString:
-			s, err := strconv.Unquote(token.val)
-			if err != nil {
-				t.error(err)
-			}
-			cmd.append(newString(token.val, s))
-		default:
-			t.unexpected(token, "command")
-		}
-	}
-	if len(cmd.Args) == 0 {
-		t.errorf("empty command")
-	}
-	return cmd
-}
-
-// hasFunction reports if a function name exists in the Tree's maps.
-func (t *Tree) hasFunction(name string) bool {
-	for _, funcMap := range t.funcs {
-		if funcMap == nil {
-			continue
-		}
-		if funcMap[name] != nil {
-			return true
-		}
-	}
-	return false
-}
-
-// popVars trims the variable list to the specified length
-func (t *Tree) popVars(n int) {
-	t.vars = t.vars[:n]
-}
-
-// useVar returns a node for a variable reference. It errors if the
-// variable is not defined.
-func (t *Tree) useVar(name string) Node {
-	v := newVariable(name)
-	for _, varName := range t.vars {
-		if varName == v.Ident[0] {
-			return v
-		}
-	}
-	t.errorf("undefined variable %q", v.Ident[0])
-	return nil
-}