格式化 snake 例子

_examples/snake/Makefile

 build:
 	-@rm ./web/*.wasm
+	go run ../../main.go fmt ./src/main.wa
+	go run ../../main.go fmt ./src/canvas/canvas.wa
+
 	go run ../../main.go build -o ./web/snake.wasm .
 
 publish:
 	make build
 	-rm -rf ../../docs/snake/
 	mkdir -p ../../docs/snake
-	cp -r ./web/ ../../docs/snake/
-	#mv ../../docs/snake/snake.html ../../docs/snake/index.html
+	cp ./web/* ../../docs/snake/
+	mv ../../docs/snake/snake.html ../../docs/snake/index.html
 
 clean:

_examples/snake/src/canvas/canvas.wa

 # 版权 @2022 凹语言 作者。保留所有权利。
 
-/*
-创建html.canvas的函数，由JS环境导入
-w、h为画布以像素为单位的宽高
-返回值为画布对象对应的网页DOM对象id
-*/
+# 创建html.canvas的函数，由JS环境导入
+# w、h为画布以像素为单位的宽高
+# 返回值为画布对象对应的网页DOM对象id
+#
 #wa:import wa_js_env newCanvas
 fn newCanvas_JS(w, h: u32) => u32
 
-/*
-将帧缓存更新至html.canvas的函数，由JS环境导入
-id为画布对象对应的网页DOM对象id
-buf为帧缓存指针
-*/
+# 将帧缓存更新至html.canvas的函数，由JS环境导入
+# id为画布对象对应的网页DOM对象id
+# buf为帧缓存指针
+#
 #wa:import wa_js_env updateCanvas
 fn updateCanvas_JS(id: u32, buf: *u32)
 
-#画布事件回调函数原型
-type OnTouch fn (x, y: u32)
+# 画布事件回调函数原型
+type OnTouch fn(x, y: u32)
 type OnKey fn(key: u32)
 
-#画布对象
+# 画布对象
 type Canvas struct {
-    device_id: u32   //画布对象对应的网页DOM对象id
-    width:     u32   //画布宽度，以像素为单位
-    height:    u32   //画布高度，以像素为单位
-    frame_buf: []u32 //画布帧缓存，容量为Width * Height
+	device_id :u32   # 画布对象对应的网页DOM对象id
+	width     :u32   # 画布宽度，以像素为单位
+	height    :u32   # 画布高度，以像素为单位
+	frame_buf :[]u32 # 画布帧缓存，容量为Width * Height
 }
 
-#画布事件
+# 画布事件
 type CanvasEvents struct {
-	Device_id:   u32     //画布设备ID
-    OnMouseDown: OnTouch //鼠标按下或触屏按下时的回调处理函数，输入参数为画布内的像素坐标
-    OnMouseUp:   OnTouch //鼠标松开或触屏松开时的回调处理函数，输入参数为画布内的像素坐标
-	OnKeyDown:   OnKey   //键盘按下，参数为键位。37=← 38=↑ 39=→ 40=↓
-	OnKeyUp:     OnKey   //键盘弹起，参数为键位
+	Device_id   :u32     # 画布设备ID
+	OnMouseDown :OnTouch # 鼠标按下或触屏按下时的回调处理函数，输入参数为画布内的像素坐标
+	OnMouseUp   :OnTouch # 鼠标松开或触屏松开时的回调处理函数，输入参数为画布内的像素坐标
+	OnKeyDown   :OnKey   # 键盘按下，参数为键位。37=← 38=↑ 39=→ 40=↓
+	OnKeyUp     :OnKey   # 键盘弹起，参数为键位
 }
 
-#创建一个宽度为w像素、高度为h像素的画布对象
+# 创建一个宽度为w像素、高度为h像素的画布对象
 fn NewCanvas(w, h: u32) => *Canvas {
-    var canvas Canvas
+	var canvas: Canvas
 	canvas.device_id = newCanvas_JS(w, h)
 	canvas.width = w
 	canvas.height = h
-	canvas.frame_buf = make([]u32, w * h)
+	canvas.frame_buf = make([]u32, w*h)
 
 	return &canvas
 }
 
-#获取画布设备ID
+# 获取画布设备ID
 fn Canvas.GetDeviceID() => u32 {
 	return this.device_id
 }
 
-#获取画布宽度
+# 获取画布宽度
 fn Canvas.GetWidth() => u32 {
 	return this.width
 }
 
-#获取画布高度
+# 获取画布高度
 fn Canvas.GetHeight() => u32 {
 	return this.height
 }
 
-#获取画布对象坐标为(x, y)处的像素颜色值
+# 获取画布对象坐标为(x, y)处的像素颜色值
 fn Canvas.GetPixel(x, y: u32) => u32 {
-    return this.frame_buf[y * this.width + x]
+	return this.frame_buf[y*this.width+x]
 }
 
-#设置画布对象坐标(x, y)处的颜色值为color
+# 设置画布对象坐标(x, y)处的颜色值为color
 fn Canvas.SetPixel(x, y, color: u32) {
-    this.frame_buf[y * this.width + x] = color
+	this.frame_buf[y*this.width+x] = color
 }
 
-#用color指定的颜色清除整个画布
+# 用color指定的颜色清除整个画布
 fn Canvas.Clear(color: u32) {
 	for i := range this.frame_buf {
 		this.frame_buf[i] = color
 	}
 }
 
-#将画布对象的帧缓存更新至网页DOM对象
+# 将画布对象的帧缓存更新至网页DOM对象
 fn Canvas.Flush() {
-    updateCanvas_JS(this.device_id, &this.frame_buf[0])
+	updateCanvas_JS(this.device_id, &this.frame_buf[0])
 }
 
 var canvas_events: []CanvasEvents
@@ -98,13 +96,11 @@ fn AttachCanvasEvents(e: CanvasEvents) {
 	canvas_events = append(canvas_events, e)
 }
 
-/*
-供外部JS调用的按下事件响应函数
-id为画布对象对应的网页DOM对象id
-(x, y)为画布像素坐标系坐标
-*/
-fn OnMouseDown(id: u32, x, y:u32) {
-    for _, i := range canvas_events {
+# 供外部JS调用的按下事件响应函数
+# id为画布对象对应的网页DOM对象id
+# (x, y)为画布像素坐标系坐标
+fn OnMouseDown(id: u32, x, y: u32) {
+	for _, i := range canvas_events {
 		if i.Device_id == id {
 			i.OnMouseDown(x, y)
 			return
@@ -112,13 +108,11 @@ fn OnMouseDown(id: u32, x, y:u32) {
 	}
 }
 
-/*
-供外部JS调用的弹起事件响应函数
-id为画布对象对应的网页DOM对象id
-(x, y)为画布像素坐标系坐标
-*/
-fn OnMouseUp(id: u32, x, y:u32) {
-    for _, i := range canvas_events {
+# 供外部JS调用的弹起事件响应函数
+# id为画布对象对应的网页DOM对象id
+# (x, y)为画布像素坐标系坐标
+fn OnMouseUp(id: u32, x, y: u32) {
+	for _, i := range canvas_events {
 		if i.Device_id == id {
 			i.OnMouseUp(x, y)
 			return
@@ -126,13 +120,11 @@ fn OnMouseUp(id: u32, x, y:u32) {
 	}
 }
 
-/*
-供外部JS调用的键盘按下事件响应函数
-id为画布对象对应的网页DOM对象id
-key为键位
-*/
-fn OnKeyDown(id, key:u32) {
-    for _, i := range canvas_events {
+# 供外部JS调用的键盘按下事件响应函数
+# id为画布对象对应的网页DOM对象id
+# key为键位
+fn OnKeyDown(id, key: u32) {
+	for _, i := range canvas_events {
 		if i.Device_id == id {
 			i.OnKeyDown(key)
 			return
@@ -140,16 +132,14 @@ fn OnKeyDown(id, key:u32) {
 	}
 }
 
-/*
-供外部JS调用的键盘弹起事件响应函数
-id为画布对象对应的网页DOM对象id
-key为键位
-*/
-fn OnKeyUp(id, key:u32) {
-    for _, i := range canvas_events {
+# 供外部JS调用的键盘弹起事件响应函数
+# id为画布对象对应的网页DOM对象id
+# key为键位
+fn OnKeyUp(id, key: u32) {
+	for _, i := range canvas_events {
 		if i.Device_id == id {
 			i.OnKeyUp(key)
 			return
 		}
 	}
-}
\ No newline at end of file
+}

_examples/snake/src/main.wa

@@ -2,20 +2,21 @@
 
 import "snake/canvas"
 
-var ca *canvas.Canvas
-fn Test(){
+var ca: *canvas.Canvas
+
+fn Test() {
 	println(42)
 
 	ca = canvas.NewCanvas(255, 255)
-	var i, j u32
+	var i, j: u32
 	for i = 0; i < 255; i++ {
 		for j = 0; j < 255; j++ {
-			ca.SetPixel(i, j, 0xFF000000 + i + j * 256)
+			ca.SetPixel(i, j, 0xFF000000+i+j*256)
 		}
 	}
 	ca.Flush()
 
-	var caev canvas.CanvasEvents
+	var caev: canvas.CanvasEvents
 	caev.Device_id = ca.GetDeviceID()
 	caev.OnMouseDown = fn(x, y: u32) {
 		println("OnMouseDown: ", x, " ", y)
@@ -34,7 +35,7 @@ fn Test(){
 }
 
 type Position struct {
-	x, y: i32
+	x, y :i32
 }
 
 const BodyColor = 0xFF0000FF
@@ -54,28 +55,28 @@ const (
 	DirDown
 )
 
-var Dirs [5]Position
+var Dirs: [5]Position
 
 type GameState struct {
-	w, h: i32
-	scale: i32
-	grid: []i8
-	body: []Position
-	dir: i32
+	w, h  :i32
+	scale :i32
+	grid  :[]i8
+	body  :[]Position
+	dir   :i32
 
-	ca: *canvas.Canvas
+	ca :*canvas.Canvas
 }
 
-var gameState GameState
+var gameState: GameState
 
 fn GameState.Init(w, h: i32, scale: i32) {
 	this.w = w
 	this.h = h
 	this.scale = scale
-	this.grid = make([]i8, u32(w * h))
-	this.ca = canvas.NewCanvas(u32(w * scale), u32(h * scale))
+	this.grid = make([]i8, u32(w*h))
+	this.ca = canvas.NewCanvas(u32(w*scale), u32(h*scale))
 
-	var caev canvas.CanvasEvents
+	var caev: canvas.CanvasEvents
 	caev.Device_id = this.ca.GetDeviceID()
 	caev.OnMouseDown = fn(x, y: u32) {}
 	caev.OnMouseUp = fn(x, y: u32) {}
@@ -107,8 +108,8 @@ fn GameState.Start() {
 }
 
 fn GameState.SetGridType(p: Position, t: i8) {
-	this.grid[p.y * this.w + p.x] = t
-	var color u32
+	this.grid[p.y*this.w+p.x] = t
+	var color: u32
 	switch t {
 	case GridBody:
 		color = BodyColor
@@ -123,7 +124,7 @@ fn GameState.SetGridType(p: Position, t: i8) {
 	var x, y: i32
 	for y = 0; y < this.scale; y++ {
 		for x = 0; x < this.scale; x++ {
-			this.ca.SetPixel(u32(p.x * this.scale + x), u32(p.y * this.scale + y), color)
+			this.ca.SetPixel(u32(p.x*this.scale+x), u32(p.y*this.scale+y), color)
 		}
 	}
 }
@@ -131,10 +132,10 @@ fn GameState.SetGridType(p: Position, t: i8) {
 #wa:import wa_js_env rand
 fn rand_JS(i32) => i32
 fn GameState.GenFood() => Position {
-	var p Position
+	var p: Position
 	for {
 		p = Position{x: rand_JS(this.w), y: rand_JS(this.h)}
-		if this.grid[p.y * this.w + p.x] == GridNull {
+		if this.grid[p.y*this.w+p.x] == GridNull {
 			this.SetGridType(p, GridFood)
 			return p
 		}
@@ -162,7 +163,7 @@ fn GameState.Step() {
 		return
 	}
 
-	newHead := this.body[len(this.body) - 1]
+	newHead := this.body[len(this.body)-1]
 	newHead.x += Dirs[this.dir].x
 	newHead.y += Dirs[this.dir].y
 
@@ -184,7 +185,7 @@ fn GameState.Step() {
 	//	return
 	//}
 
-	switch this.grid[newHead.y * this.w + newHead.x] {
+	switch this.grid[newHead.y*this.w+newHead.x] {
 	case GridBody:
 		this.Start()
 		return

_examples/snake/web/snake.html

@@ -5,7 +5,7 @@
   <meta charset="UTF-8">
   <meta http-equiv="X-UA-Compatible" content="IE=edge">
   <meta name="viewport" content="width=device-width, initial-scale=1.0">
-  <title>WA Canvas</title>
+  <title>Wa: Snack Game</title>
   <style>
     * {
       margin: 0;

internal/parser/parser.go

@@ -263,7 +263,7 @@ func (p *parser) consumeComment() (comment *ast.Comment, endline int) {
 	// /*-style comments may end on a different line than where they start.
 	// Scan the comment for '\n' chars and adjust endline accordingly.
 	endline = p.file.Line(p.pos)
-	if p.lit[1] == '*' {
+	if p.lit[0] == '/' && p.lit[1] == '*' {
 		// don't use range here - no need to decode Unicode code points
 		for i := 0; i < len(p.lit); i++ {
 			if p.lit[i] == '\n' {

internal/printer/printer.go

@@ -648,8 +648,13 @@ func (p *printer) writeComment(comment *ast.Comment) {
 		p.indent = 0
 	}
 
+	// shortcut common case of #-style comments
+	if text[0] == '#' {
+		p.writeString(pos, trimRight(text), true)
+		return
+	}
 	// shortcut common case of //-style comments
-	if text[1] == '/' {
+	if text[0] == '/' && text[1] == '/' {
 		p.writeString(pos, trimRight(text), true)
 		return
 	}