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- // Copyright 2017 Google Inc. All rights reserved.
- //
- // Licensed under the Apache License, Version 2.0 (the "License");
- // you may not use this file except in compliance with the License.
- // You may obtain a copy of the License at
- //
- // http://www.apache.org/licenses/LICENSE-2.0
- //
- // Unless required by applicable law or agreed to in writing, software
- // distributed under the License is distributed on an "AS IS" BASIS,
- // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- // See the License for the specific language governing permissions and
- // limitations under the License.
- package parser
- type Pos int
- const NoPos Pos = 0
- type Node interface {
- Dump() string
- Pos() Pos
- End() Pos
- }
- type Assignment struct {
- Target *MakeString
- Name *MakeString
- Value *MakeString
- Type string
- }
- func (x *Assignment) Dump() string {
- target := ""
- if x.Target != nil {
- target = x.Target.Dump() + ": "
- }
- return target + x.Name.Dump() + " " + x.Type + " " + x.Value.Dump()
- }
- func (x *Assignment) Pos() Pos {
- if x.Target != nil {
- return x.Target.Pos()
- }
- return x.Name.Pos()
- }
- func (x *Assignment) End() Pos { return x.Value.End() }
- type Comment struct {
- CommentPos Pos
- Comment string
- }
- func (x *Comment) Dump() string {
- return "#" + x.Comment
- }
- func (x *Comment) Pos() Pos { return x.CommentPos }
- func (x *Comment) End() Pos { return Pos(int(x.CommentPos) + len(x.Comment)) }
- type Directive struct {
- NamePos Pos
- Name string
- Args *MakeString
- EndPos Pos
- }
- func (x *Directive) Dump() string {
- return x.Name + " " + x.Args.Dump()
- }
- func (x *Directive) Pos() Pos { return x.NamePos }
- func (x *Directive) End() Pos {
- if x.EndPos != NoPos {
- return x.EndPos
- }
- return x.Args.End()
- }
- type Rule struct {
- Target *MakeString
- Prerequisites *MakeString
- RecipePos Pos
- Recipe string
- }
- func (x *Rule) Dump() string {
- recipe := ""
- if x.Recipe != "" {
- recipe = "\n" + x.Recipe
- }
- return "rule: " + x.Target.Dump() + ": " + x.Prerequisites.Dump() + recipe
- }
- func (x *Rule) Pos() Pos { return x.Target.Pos() }
- func (x *Rule) End() Pos { return Pos(int(x.RecipePos) + len(x.Recipe)) }
- type Variable struct {
- Name *MakeString
- }
- func (x *Variable) Pos() Pos { return x.Name.Pos() }
- func (x *Variable) End() Pos { return x.Name.End() }
- func (x *Variable) Dump() string {
- return "$(" + x.Name.Dump() + ")"
- }
- // Sort interface for []Node by position
- type byPosition []Node
- func (s byPosition) Len() int {
- return len(s)
- }
- func (s byPosition) Swap(i, j int) {
- s[i], s[j] = s[j], s[i]
- }
- func (s byPosition) Less(i, j int) bool {
- return s[i].Pos() < s[j].Pos()
- }
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