code review 4695047: exp/eval, exp/ogle: remove packages eval and ogle

src/pkg/exp/eval/compiler.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.
-
-package eval
-
-import (
-        "fmt"
-        "go/scanner"
-        "go/token"
-)
-
-
-// A compiler captures information used throughout an entire
-// compilation.  Currently it includes only the error handler.
-//
-// TODO(austin) This might actually represent package level, in which
-// case it should be package compiler.
-type compiler struct {
-        fset         *token.FileSet
-        errors       scanner.ErrorHandler
-        numErrors    int
-        silentErrors int
-}
-
-func (a *compiler) diagAt(pos token.Pos, format string, args ...interface{}) {
-        a.errors.Error(a.fset.Position(pos), fmt.Sprintf(format, args...))
-        a.numErrors++
-}
-
-func (a *compiler) numError() int { return a.numErrors + a.silentErrors }
-
-// The universal scope
-func newUniverse() *Scope {
-        sc := &Scope{nil, 0}
-        sc.block = &block{
-                offset: 0,
-                scope:  sc,
-                global: true,
-                defs:   make(map[string]Def),
-        }
-        return sc
-}
-
-var universe *Scope = newUniverse()
-
-
-// TODO(austin) These can all go in stmt.go now
-type label struct {
-        name string
-        desc string
-        // The PC goto statements should jump to, or nil if this label
-        // cannot be goto'd (such as an anonymous for loop label).
-        gotoPC *uint
-        // The PC break statements should jump to, or nil if a break
-        // statement is invalid.
-        breakPC *uint
-        // The PC continue statements should jump to, or nil if a
-        // continue statement is invalid.
-        continuePC *uint
-        // The position where this label was resolved.  If it has not
-        // been resolved yet, an invalid position.
-        resolved token.Pos
-        // The position where this label was first jumped to.
-        used token.Pos
-}
-
-// A funcCompiler captures information used throughout the compilation
-// of a single function body.
-type funcCompiler struct {
-        *compiler
-        fnType *FuncType
-        // Whether the out variables are named.  This affects what
-        // kinds of return statements are legal.
-        outVarsNamed bool
-        *codeBuf
-        flow   *flowBuf
-        labels map[string]*label
-}
-
-// A blockCompiler captures information used throughout the compilation
-// of a single block within a function.
-type blockCompiler struct {
-        *funcCompiler
-        block *block
-        // The label of this block, used for finding break and
-        // continue labels.
-        label *label
-        // The blockCompiler for the block enclosing this one, or nil
-        // for a function-level block.
-        parent *blockCompiler
-}