graph/formats/dot: allow unicode inside html

graph/formats/dot/internal/Makefile

@@ -1,14 +1,14 @@
 gen: dot.bnf
 	gocc $<
-	./paste_copyright.bash
+	go run paste_copyright.go
 
 debug_lexer: dot.bnf
 	gocc -debug_lexer -v -a $<
-	./paste_copyright.bash
+	go run paste_copyright.go
 
 debug_parser: dot.bnf
 	gocc -debug_parser -v -a $<
-	./paste_copyright.bash
+	go run paste_copyright.go
 
 clean:
 	rm -f errors/errors.go

graph/formats/dot/internal/dot.bnf

@@ -131,6 +131,7 @@ _html_char
 	| '\x3D'
 	// skip right angle bracket (0x3E)
 	| '\x3F' - '\xFF'
+	| _unicode_byte
 ;
 
 _html_chars : { _html_char } ;

graph/formats/dot/internal/errors/errors.go

@@ -55,7 +55,7 @@ func (e *Error) Error() string {
 	w := new(bytes.Buffer)
 	fmt.Fprintf(w, "Error in S%d: %s, %s", e.StackTop, token.TokMap.TokenString(e.ErrorToken), e.ErrorToken.Pos.String())
 	if e.Err != nil {
-		fmt.Fprintf(w, e.Err.Error())
+		fmt.Fprintf(w, ": %+v", e.Err)
 	} else {
 		fmt.Fprintf(w, ", expected one of: ")
 		for _, expected := range e.ExpectedTokens {

graph/formats/dot/internal/lexer/acttab.go

@@ -207,7 +207,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S44
-		Accept: 19,
+		Accept: 0,
 		Ignore: "",
 	},
 	ActionRow{ // S45
@@ -283,7 +283,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S63
-		Accept: 0,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S64
@@ -299,19 +299,19 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S67
-		Accept: 19,
-		Ignore: "",
-	},
-	ActionRow{ // S68
 		Accept: 0,
 		Ignore: "",
 	},
-	ActionRow{ // S69
+	ActionRow{ // S68
 		Accept: 19,
 		Ignore: "",
 	},
+	ActionRow{ // S69
+		Accept: 0,
+		Ignore: "",
+	},
 	ActionRow{ // S70
-		Accept: 19,
+		Accept: 0,
 		Ignore: "",
 	},
 	ActionRow{ // S71
@@ -387,19 +387,19 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S89
-		Accept: -1,
-		Ignore: "!comment",
+		Accept: 19,
+		Ignore: "",
 	},
 	ActionRow{ // S90
-		Accept: 0,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S91
-		Accept: 19,
-		Ignore: "",
+		Accept: -1,
+		Ignore: "!comment",
 	},
 	ActionRow{ // S92
-		Accept: 19,
+		Accept: 0,
 		Ignore: "",
 	},
 	ActionRow{ // S93
@@ -407,7 +407,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S94
-		Accept: 12,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S95
@@ -415,11 +415,11 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S96
-		Accept: 19,
+		Accept: 12,
 		Ignore: "",
 	},
 	ActionRow{ // S97
-		Accept: 11,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S98
@@ -427,7 +427,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S99
-		Accept: 19,
+		Accept: 11,
 		Ignore: "",
 	},
 	ActionRow{ // S100
@@ -479,7 +479,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S112
-		Accept: 6,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S113
@@ -487,7 +487,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S114
-		Accept: 19,
+		Accept: 6,
 		Ignore: "",
 	},
 	ActionRow{ // S115
@@ -535,7 +535,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S126
-		Accept: 5,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S127
@@ -543,7 +543,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S128
-		Accept: 19,
+		Accept: 5,
 		Ignore: "",
 	},
 	ActionRow{ // S129
@@ -567,7 +567,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S134
-		Accept: 7,
+		Accept: 19,
 		Ignore: "",
 	},
 	ActionRow{ // S135
@@ -575,7 +575,7 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S136
-		Accept: 19,
+		Accept: 7,
 		Ignore: "",
 	},
 	ActionRow{ // S137
@@ -591,6 +591,14 @@ var ActTab = ActionTable{
 		Ignore: "",
 	},
 	ActionRow{ // S140
+		Accept: 19,
+		Ignore: "",
+	},
+	ActionRow{ // S141
+		Accept: 19,
+		Ignore: "",
+	},
+	ActionRow{ // S142
 		Accept: 17,
 		Ignore: "",
 	},

graph/formats/dot/internal/lexer/lexer.go

@@ -21,7 +21,7 @@ import (
 
 const (
 	NoState    = -1
-	NumStates  = 141
+	NumStates  = 143
 	NumSymbols = 184
 )
 

graph/formats/dot/internal/lexer/testdata/tokens.dot

@@ -20,6 +20,7 @@ graph {
 	-20
 	3.14
 	F [label=<<div>foo</div>>]
+	H [label=<<div>→</div>>]
 	_foo
 	a10
 }

graph/formats/dot/internal/lexer/testdata/tokens.golden

@@ -18,6 +18,7 @@ graph {
 	-20
 	3.14
 	F [label=<<div>foo</div>>]
+	H [label=<<div>→</div>>]
 	_foo
 	a10
 }

graph/formats/dot/internal/parser/parser.go

@@ -83,7 +83,12 @@ func (s *stack) String() string {
 		if s.attrib[i] == nil {
 			fmt.Fprintf(w, "nil")
 		} else {
-			fmt.Fprintf(w, "%v", s.attrib[i])
+			switch attr := s.attrib[i].(type) {
+			case *token.Token:
+				fmt.Fprintf(w, "%s", attr.Lit)
+			default:
+				fmt.Fprintf(w, "%v", attr)
+			}
 		}
 		fmt.Fprintf(w, "\n")
 	}
@@ -147,7 +152,7 @@ func (p *Parser) Error(err error, scanner Scanner) (recovered bool, errorAttrib
 
 func (p *Parser) popNonRecoveryStates() (removedAttribs []parseError.ErrorSymbol) {
 	if rs, ok := p.firstRecoveryState(); ok {
-		errorSymbols := p.stack.popN(int(p.stack.topIndex() - rs))
+		errorSymbols := p.stack.popN(p.stack.topIndex() - rs)
 		removedAttribs = make([]parseError.ErrorSymbol, len(errorSymbols))
 		for i, e := range errorSymbols {
 			removedAttribs[i] = e

graph/formats/dot/internal/paste_copyright.bash

@@ -1,17 +0,0 @@
-#!/usr/bin/env bash
-
-find . -type f -name '*.go' \
-| xargs sed -i -e "s|// Code generated by gocc; DO NOT EDIT.|\
-// Code generated by gocc; DO NOT EDIT.\n\
-\n\
-// This file is dual licensed under CC0 and The gonum license.\n\
-//\n\
-// Copyright ©2017 The Gonum Authors. All rights reserved.\n\
-// Use of this source code is governed by a BSD-style\n\
-// license that can be found in the LICENSE file.\n\
-//\n\
-// Copyright ©2017 Robin Eklind.\n\
-// This file is made available under a Creative Commons CC0 1.0\n\
-// Universal Public Domain Dedication.\
-|"
-

graph/formats/dot/internal/paste_copyright.go

@@ -0,0 +1,47 @@
+// +build ignore
+
+package main
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+)
+
+var location = []byte(`// Code generated by gocc; DO NOT EDIT.`)
+var copyright = []byte(`// Code generated by gocc; DO NOT EDIT.
+
+// This file is dual licensed under CC0 and The gonum license.
+//
+// Copyright ©2017 The Gonum Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+//
+// Copyright ©2017 Robin Eklind.
+// This file is made available under a Creative Commons CC0 1.0
+// Universal Public Domain Dedication.`)
+
+func main() {
+	err := filepath.Walk(".", func(path string, info os.FileInfo, err error) error {
+		if err != nil {
+			return err
+		}
+		if info.IsDir() || filepath.Dir(path) == "." || filepath.Ext(path) != ".go" {
+			return nil
+		}
+
+		content, err := ioutil.ReadFile(path)
+		if err != nil {
+			return err
+		}
+
+		content = bytes.Replace(content, location, copyright, 1)
+		return ioutil.WriteFile(path, content, info.Mode())
+	})
+
+	if err != nil {
+		fmt.Printf("error walking the path: %v\n", err)
+	}
+}