*: add the http debuger tool

Builder/GoCodeTemplate.go

@@ -5,6 +5,14 @@ var goCodeTemplateStr string = `
 // Code header part 
 {{.CodeHeader}}
 import 	"strings"
+{{if .HttpParser}}
+import(
+	"io/ioutil"
+	"net/http"
+	"time"
+	"encoding/json"
+)
+{{end}}
 // const part
 {{.ConstPart}}
 {{ if .NeedPacked }}
@@ -135,6 +143,9 @@ func Parser(input string) *ValType {
 		}
 		s := &StateSymStack[StackPointer-1]
 		a := s.Action(lookAhead)
+		{{ if .HttpParser }}
+		TracePingFun(input[currentPos:])
+		{{ end }}
 		if a == ERROR_ACTION {
 			lines := strings.Split(input[:currentPos], "\n")
 			panic("Grammar parse error near :" + lines[len(lines)-1])
@@ -173,6 +184,7 @@ func translate(c int) int {
 	}
 	return conv
 }
+
 // Trace function for translate
 func TraceTranslate(c int) string {
 	var conv string = ""
@@ -189,5 +201,76 @@ func TraceReduce(reduceIndex, s int, look string) {
 		}
 	}
 }
+{{if .HttpParser}}
+// Trace function for Ping
+func TracePingFun(rest string) {
+	var result map[string]interface{} = make(map[string]interface{})
+	var stateStack []string
+	var symStack []string
+	var valueStack []string
+	for i := 0; i < StackPointer; i++ {
+		v := StateSymStack[i]
+		stateStack = append(stateStack, fmt.Sprintf("%d", v.Yystate))
+		symStack = append(symStack, TraceTranslate(v.YySymIndex))
+		valueStack = append(valueStack, fmt.Sprintf("%v", v.ValType.val))
+	}
+	result["states"] = stateStack
+	result["symbols"] = symStack
+	result["values"] = valueStack
+	result["rest"] = rest
+
+	js, _ := json.Marshal(result)
+	ochan <- string(js)
+	<-schan
+}
+
+type PingType struct {
+	Input string` + "`" + `json:"input"` + "`" + `
+}
+
+var schan chan string = make(chan string)
+var ochan chan string = make(chan string)
+var finished bool = true
+
+// Ping Function
+func handlerPing(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", r.Header.Get("Origin"))
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+	if finished {
+		go ParserFun()
+	}
+	reqBody, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		fmt.Fprintf(w, "Kindly enter data with the event title and description only in order to update")
+	}
+	var ping PingType
+
+	json.Unmarshal(reqBody, &ping)
+	fmt.Println(ping.Input)
+	schan <- ping.Input
+	w.Write([]byte(<-ochan))
+	fmt.Println(time.Now(), r.Method, r.RequestURI, r.UserAgent())
+}
+
+func ParserFun() {
+	finished = false
+	ParserInit()
+	input := <-schan
+	_ = Parser(input)
+	finished = true
+}
+
+func main() {
+	http.HandleFunc("/ping", handlerPing)
+
+	fmt.Println("ping listening on 0.0.0.0, port 8080")
+	err := http.ListenAndServe(":8080", nil)
+
+	if err != nil {
+		fmt.Println("Error starting ping server: ", err)
+	}
+}
+
+{{end}}
 // Code Last part
 {{.CodeLast}}`

Builder/GoTemplBuilder.go

@@ -16,6 +16,7 @@ import (
 type TemplateBuilder struct {
 	vnode          *parser.RootVistor
 	NeedPacked     bool
+	HttpParser     bool
 	NTerminals     int
 	HeaderPart     string
 	CodeHeader     string
@@ -62,6 +63,7 @@ func NewTemplateBuilder(w *parser.Walker) *TemplateBuilder {
 
 func (b *TemplateBuilder) buildConstPart() {
 	b.NeedPacked = b.vnode.NeedPacked && utils.PackFlags
+	b.HttpParser = utils.HttpDebug
 	b.NTerminals = len(b.vnode.G.VtSet)
 	b.CodeHeader = b.vnode.GetCode()
 	b.CodeLast = b.vnode.GetCodeCopy()

Builder/goCode.templ

@@ -2,6 +2,14 @@
 // Code header part 
 {{.CodeHeader}}
 import 	"strings"
+{{if .HttpParser}}
+import(
+	"io/ioutil"
+	"net/http"
+	"time"
+	"encoding/json"
+)
+{{end}}
 // const part
 {{.ConstPart}}
 {{ if .NeedPacked }}
@@ -132,6 +140,9 @@ func Parser(input string) *ValType {
 		}
 		s := &StateSymStack[StackPointer-1]
 		a := s.Action(lookAhead)
+		{{ if .HttpParser }}
+		TracePingFun(input[currentPos:])
+		{{ end }}
 		if a == ERROR_ACTION {
 			lines := strings.Split(input[:currentPos], "\n")
 			panic("Grammar parse error near :" + lines[len(lines)-1])
@@ -170,6 +181,7 @@ func translate(c int) int {
 	}
 	return conv
 }
+
 // Trace function for translate
 func TraceTranslate(c int) string {
 	var conv string = ""
@@ -186,5 +198,76 @@ func TraceReduce(reduceIndex, s int, look string) {
 		}
 	}
 }
+{{if .HttpParser}}
+// Trace function for Ping
+func TracePingFun(rest string) {
+	var result map[string]interface{} = make(map[string]interface{})
+	var stateStack []string
+	var symStack []string
+	var valueStack []string
+	for i := 0; i < StackPointer; i++ {
+		v := StateSymStack[i]
+		stateStack = append(stateStack, fmt.Sprintf("%d", v.Yystate))
+		symStack = append(symStack, TraceTranslate(v.YySymIndex))
+		valueStack = append(valueStack, fmt.Sprintf("%v", v.ValType.val))
+	}
+	result["states"] = stateStack
+	result["symbols"] = symStack
+	result["values"] = valueStack
+	result["rest"] = rest
+
+	js, _ := json.Marshal(result)
+	ochan <- string(js)
+	<-schan
+}
+
+type PingType struct {
+	Input string` + "`" + `json:"input"` + "`" + `
+}
+
+var schan chan string = make(chan string)
+var ochan chan string = make(chan string)
+var finished bool = true
+
+// Ping Function
+func handlerPing(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Access-Control-Allow-Origin", r.Header.Get("Origin"))
+	w.Header().Set("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE")
+	if finished {
+		go ParserFun()
+	}
+	reqBody, err := ioutil.ReadAll(r.Body)
+	if err != nil {
+		fmt.Fprintf(w, "Kindly enter data with the event title and description only in order to update")
+	}
+	var ping PingType
+
+	json.Unmarshal(reqBody, &ping)
+	fmt.Println(ping.Input)
+	schan <- ping.Input
+	w.Write([]byte(<-ochan))
+	fmt.Println(time.Now(), r.Method, r.RequestURI, r.UserAgent())
+}
+
+func ParserFun() {
+	finished = false
+	ParserInit()
+	input := <-schan
+	_ = Parser(input)
+	finished = true
+}
+
+func main() {
+	http.HandleFunc("/ping", handlerPing)
+
+	fmt.Println("ping listening on 0.0.0.0, port 8080")
+	err := http.ListenAndServe(":8080", nil)
+
+	if err != nil {
+		fmt.Println("Error starting ping server: ", err)
+	}
+}
+
+{{end}}
 // Code Last part
 {{.CodeLast}}

README.md

@@ -52,6 +52,19 @@ look ahead $, use Reduce:PROG -> PROG E NL , go to state 1
 Shift PROG, push state 1
 0
 ```
+# Web Debuger
+If you want to debug the parser visually, you can use yaccgo debuger in browser.
+![debuger](debugtool.gif)
+## 1. generate http debuger parser
+```
+./bin/yaccgo generate go --httpdebug=true examples/exprhttp.y out/expr.go
+```
+## 2. run http debuger
+```
+go run out/expr.go
+
+```
+## 3. open the `debugTool.html` in browser
 
 # Design
 

Utils/flags.go

@@ -6,3 +6,4 @@ package utils
 
 var DebugFlags bool = false
 var PackFlags bool = true
+var HttpDebug bool = false

debugTool.html

@@ -0,0 +1,85 @@
+<!doctype html>
+<html lang="en">
+  <head>
+    <meta charset="utf-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
+    <title>YaccGo</title>
+    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
+    <link rel="stylesheet" href="stylesheet/custome.css">
+  </head>
+  <body>
+    <div class="container">
+      <h1>Debuger YaccGo</h1>
+      <p>Show the stack for every steps!</p>
+      <div class="row">
+        <div class="col">
+          <div class="panel panel-blue">
+            <div class="form-group">
+             <label for="name">input the strings :</label>
+              <input class="input-sm form-control" id="item-87" placeholder="Enter your string to parse">
+              <small id="rest" class="form-text text-muted">after input, you can run the parser step by step.</small>
+            </div>
+            <button type="submit" class="btn btn-primary" id="buttonSubmit">Step Run</button>
+
+          </div>
+        </div>
+      </div>
+      <div class="row">
+        <div class="col">
+          <div class="panel panel-purple">States Stack
+            <ul class="list-group" id="list1">
+            </ul>
+          </div>
+        </div>
+         <div class="col">
+           <div class="panel panel-purple">Symbols Stack
+            <ul class="list-group" id="list2">
+            </ul>
+           </div>
+         </div>
+         <div class="col">
+          <div class="panel panel-purple"> Values Stack
+            <ul class="list-group" id="list3">
+            </ul>
+          </div>
+        </div>
+      </div>
+
+    </div>
+
+    <script
+    src="https://code.jquery.com/jquery-3.6.0.min.js"
+    integrity="sha256-/xUj+3OJU5yExlq6GSYGSHk7tPXikynS7ogEvDej/m4="
+    crossorigin="anonymous"></script>
+    <script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-pprn3073KE6tl6bjs2QrFaJGz5/SUsLqktiwsUTF55Jfv3qYSDhgCecCxMW52nD2" crossorigin="anonymous"></script>
+    <script> 
+      $(document).ready(function(){
+        $("#buttonSubmit").click(function(){
+          txt=$("#item-87").val();
+          $.post("http://localhost:8080/ping",
+          JSON.stringify({input:txt}), 
+          function(result){
+            console.log(result);
+            $("#list1").empty();
+            $("#list2").empty();
+            $("#list3").empty();
+            for(i=0;i<result.states.length;i++){
+              $("#list1").append("<li class='list-group-item'>"+result.states[i]+"</li>");
+            }
+            for(i=0;i<result.symbols.length;i++){
+              $("#list2").append("<li class='list-group-item'>"+result.symbols[i]+"</li>");
+            }
+            for(i=0;i<result.values.length;i++){
+              $("#list3").append("<li class='list-group-item'>"+result.values[i]+"</li>");
+            }
+            $("#rest").text(result.rest);
+          },"json",
+          function(error){
+            console.log(error);
+          });
+
+        });
+      });
+      </script>
+  </body>
+</html>

examples/expr.y

@@ -79,6 +79,7 @@ E:
 			return 0
 		}
 	}
+
 func main() {
 	v := Parser("1+2*31").val
 	fmt.Println(v)