config: return to the go1.5 generated lang/y.go

It has improvements to error messaging that we want.

We'll use this occasion begin developing / building with Go 1.5 from
here on out. Build times will be slower, but we have core development
plans that will help mitigate that.

/cc @hashicorp/terraform-committers
This commit is contained in:
Paul Hinze 2015-10-28 12:17:14 -04:00
parent 192111074a
commit af04321723
1 changed files with 204 additions and 68 deletions

View File

@ -30,7 +30,10 @@ const INTEGER = 57355
const FLOAT = 57356
const STRING = 57357
var parserToknames = []string{
var parserToknames = [...]string{
"$end",
"error",
"$unk",
"PROGRAM_BRACKET_LEFT",
"PROGRAM_BRACKET_RIGHT",
"PROGRAM_STRING_START",
@ -44,7 +47,7 @@ var parserToknames = []string{
"FLOAT",
"STRING",
}
var parserStatenames = []string{}
var parserStatenames = [...]string{}
const parserEofCode = 1
const parserErrCode = 2
@ -53,7 +56,7 @@ const parserMaxDepth = 200
//line lang.y:165
//line yacctab:1
var parserExca = []int{
var parserExca = [...]int{
-1, 1,
1, -1,
-2, 0,
@ -67,75 +70,103 @@ var parserStates []string
const parserLast = 30
var parserAct = []int{
var parserAct = [...]int{
9, 20, 16, 16, 7, 7, 3, 18, 10, 8,
1, 17, 14, 12, 13, 6, 6, 19, 8, 22,
15, 23, 24, 11, 2, 25, 16, 21, 4, 5,
}
var parserPact = []int{
var parserPact = [...]int{
1, -1000, 1, -1000, -1000, -1000, -1000, 0, -1000, 15,
0, 1, -1000, -1000, -1, -1000, 0, -8, 0, -1000,
-1000, 12, -9, -1000, 0, -9,
}
var parserPgo = []int{
var parserPgo = [...]int{
0, 0, 29, 28, 23, 6, 27, 10,
}
var parserR1 = []int{
var parserR1 = [...]int{
0, 7, 7, 4, 4, 5, 5, 2, 1, 1,
1, 1, 1, 1, 1, 6, 6, 6, 3,
}
var parserR2 = []int{
var parserR2 = [...]int{
0, 0, 1, 1, 2, 1, 1, 3, 3, 1,
1, 1, 3, 1, 4, 0, 3, 1, 1,
}
var parserChk = []int{
var parserChk = [...]int{
-1000, -7, -4, -5, -3, -2, 15, 4, -5, -1,
8, -4, 13, 14, 12, 5, 11, -1, 8, -1,
9, -6, -1, 9, 10, -1,
}
var parserDef = []int{
var parserDef = [...]int{
1, -2, 2, 3, 5, 6, 18, 0, 4, 0,
0, 9, 10, 11, 13, 7, 0, 0, 15, 12,
8, 0, 17, 14, 0, 16,
}
var parserTok1 = []int{
var parserTok1 = [...]int{
1,
}
var parserTok2 = []int{
var parserTok2 = [...]int{
2, 3, 4, 5, 6, 7, 8, 9, 10, 11,
12, 13, 14, 15,
}
var parserTok3 = []int{
var parserTok3 = [...]int{
0,
}
var parserErrorMessages = [...]struct {
state int
token int
msg string
}{}
//line yaccpar:1
/* parser for yacc output */
var parserDebug = 0
var (
parserDebug = 0
parserErrorVerbose = false
)
type parserLexer interface {
Lex(lval *parserSymType) int
Error(s string)
}
type parserParser interface {
Parse(parserLexer) int
Lookahead() int
}
type parserParserImpl struct {
lookahead func() int
}
func (p *parserParserImpl) Lookahead() int {
return p.lookahead()
}
func parserNewParser() parserParser {
p := &parserParserImpl{
lookahead: func() int { return -1 },
}
return p
}
const parserFlag = -1000
func parserTokname(c int) string {
// 4 is TOKSTART above
if c >= 4 && c-4 < len(parserToknames) {
if parserToknames[c-4] != "" {
return parserToknames[c-4]
if c >= 1 && c-1 < len(parserToknames) {
if parserToknames[c-1] != "" {
return parserToknames[c-1]
}
}
return __yyfmt__.Sprintf("tok-%v", c)
@ -150,51 +181,129 @@ func parserStatname(s int) string {
return __yyfmt__.Sprintf("state-%v", s)
}
func parserlex1(lex parserLexer, lval *parserSymType) int {
c := 0
char := lex.Lex(lval)
func parserErrorMessage(state, lookAhead int) string {
const TOKSTART = 4
if !parserErrorVerbose {
return "syntax error"
}
for _, e := range parserErrorMessages {
if e.state == state && e.token == lookAhead {
return "syntax error: " + e.msg
}
}
res := "syntax error: unexpected " + parserTokname(lookAhead)
// To match Bison, suggest at most four expected tokens.
expected := make([]int, 0, 4)
// Look for shiftable tokens.
base := parserPact[state]
for tok := TOKSTART; tok-1 < len(parserToknames); tok++ {
if n := base + tok; n >= 0 && n < parserLast && parserChk[parserAct[n]] == tok {
if len(expected) == cap(expected) {
return res
}
expected = append(expected, tok)
}
}
if parserDef[state] == -2 {
i := 0
for parserExca[i] != -1 || parserExca[i+1] != state {
i += 2
}
// Look for tokens that we accept or reduce.
for i += 2; parserExca[i] >= 0; i += 2 {
tok := parserExca[i]
if tok < TOKSTART || parserExca[i+1] == 0 {
continue
}
if len(expected) == cap(expected) {
return res
}
expected = append(expected, tok)
}
// If the default action is to accept or reduce, give up.
if parserExca[i+1] != 0 {
return res
}
}
for i, tok := range expected {
if i == 0 {
res += ", expecting "
} else {
res += " or "
}
res += parserTokname(tok)
}
return res
}
func parserlex1(lex parserLexer, lval *parserSymType) (char, token int) {
token = 0
char = lex.Lex(lval)
if char <= 0 {
c = parserTok1[0]
token = parserTok1[0]
goto out
}
if char < len(parserTok1) {
c = parserTok1[char]
token = parserTok1[char]
goto out
}
if char >= parserPrivate {
if char < parserPrivate+len(parserTok2) {
c = parserTok2[char-parserPrivate]
token = parserTok2[char-parserPrivate]
goto out
}
}
for i := 0; i < len(parserTok3); i += 2 {
c = parserTok3[i+0]
if c == char {
c = parserTok3[i+1]
token = parserTok3[i+0]
if token == char {
token = parserTok3[i+1]
goto out
}
}
out:
if c == 0 {
c = parserTok2[1] /* unknown char */
if token == 0 {
token = parserTok2[1] /* unknown char */
}
if parserDebug >= 3 {
__yyfmt__.Printf("lex %s(%d)\n", parserTokname(c), uint(char))
__yyfmt__.Printf("lex %s(%d)\n", parserTokname(token), uint(char))
}
return c
return char, token
}
func parserParse(parserlex parserLexer) int {
return parserNewParser().Parse(parserlex)
}
func (parserrcvr *parserParserImpl) Parse(parserlex parserLexer) int {
var parsern int
var parserlval parserSymType
var parserVAL parserSymType
var parserDollar []parserSymType
_ = parserDollar // silence set and not used
parserS := make([]parserSymType, parserMaxDepth)
Nerrs := 0 /* number of errors */
Errflag := 0 /* error recovery flag */
parserstate := 0
parserchar := -1
parsertoken := -1 // parserchar translated into internal numbering
parserrcvr.lookahead = func() int { return parserchar }
defer func() {
// Make sure we report no lookahead when not parsing.
parserstate = -1
parserchar = -1
parsertoken = -1
}()
parserp := -1
goto parserstack
@ -207,7 +316,7 @@ ret1:
parserstack:
/* put a state and value onto the stack */
if parserDebug >= 4 {
__yyfmt__.Printf("char %v in %v\n", parserTokname(parserchar), parserStatname(parserstate))
__yyfmt__.Printf("char %v in %v\n", parserTokname(parsertoken), parserStatname(parserstate))
}
parserp++
@ -225,15 +334,16 @@ parsernewstate:
goto parserdefault /* simple state */
}
if parserchar < 0 {
parserchar = parserlex1(parserlex, &parserlval)
parserchar, parsertoken = parserlex1(parserlex, &parserlval)
}
parsern += parserchar
parsern += parsertoken
if parsern < 0 || parsern >= parserLast {
goto parserdefault
}
parsern = parserAct[parsern]
if parserChk[parsern] == parserchar { /* valid shift */
if parserChk[parsern] == parsertoken { /* valid shift */
parserchar = -1
parsertoken = -1
parserVAL = parserlval
parserstate = parsern
if Errflag > 0 {
@ -247,7 +357,7 @@ parserdefault:
parsern = parserDef[parserstate]
if parsern == -2 {
if parserchar < 0 {
parserchar = parserlex1(parserlex, &parserlval)
parserchar, parsertoken = parserlex1(parserlex, &parserlval)
}
/* look through exception table */
@ -260,7 +370,7 @@ parserdefault:
}
for xi += 2; ; xi += 2 {
parsern = parserExca[xi+0]
if parsern < 0 || parsern == parserchar {
if parsern < 0 || parsern == parsertoken {
break
}
}
@ -273,11 +383,11 @@ parserdefault:
/* error ... attempt to resume parsing */
switch Errflag {
case 0: /* brand new error */
parserlex.Error("syntax error")
parserlex.Error(parserErrorMessage(parserstate, parsertoken))
Nerrs++
if parserDebug >= 1 {
__yyfmt__.Printf("%s", parserStatname(parserstate))
__yyfmt__.Printf(" saw %s\n", parserTokname(parserchar))
__yyfmt__.Printf(" saw %s\n", parserTokname(parsertoken))
}
fallthrough
@ -305,12 +415,13 @@ parserdefault:
case 3: /* no shift yet; clobber input char */
if parserDebug >= 2 {
__yyfmt__.Printf("error recovery discards %s\n", parserTokname(parserchar))
__yyfmt__.Printf("error recovery discards %s\n", parserTokname(parsertoken))
}
if parserchar == parserEofCode {
if parsertoken == parserEofCode {
goto ret1
}
parserchar = -1
parsertoken = -1
goto parsernewstate /* try again in the same state */
}
}
@ -325,6 +436,13 @@ parserdefault:
_ = parserpt // guard against "declared and not used"
parserp -= parserR2[parsern]
// parserp is now the index of $0. Perform the default action. Iff the
// reduced production is ε, $1 is possibly out of range.
if parserp+1 >= len(parserS) {
nyys := make([]parserSymType, len(parserS)*2)
copy(nyys, parserS)
parserS = nyys
}
parserVAL = parserS[parserp+1]
/* consult goto table to find next state */
@ -344,6 +462,7 @@ parserdefault:
switch parsernt {
case 1:
parserDollar = parserS[parserpt-0 : parserpt+1]
//line lang.y:35
{
parserResult = &ast.LiteralNode{
@ -353,9 +472,10 @@ parserdefault:
}
}
case 2:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:43
{
parserResult = parserS[parserpt-0].node
parserResult = parserDollar[1].node
// We want to make sure that the top value is always a Concat
// so that the return value is always a string type from an
@ -365,28 +485,30 @@ parserdefault:
// because functionally the AST is the same, but we do that because
// it makes for an easy literal check later (to check if a string
// has any interpolations).
if _, ok := parserS[parserpt-0].node.(*ast.Concat); !ok {
if n, ok := parserS[parserpt-0].node.(*ast.LiteralNode); !ok || n.Typex != ast.TypeString {
if _, ok := parserDollar[1].node.(*ast.Concat); !ok {
if n, ok := parserDollar[1].node.(*ast.LiteralNode); !ok || n.Typex != ast.TypeString {
parserResult = &ast.Concat{
Exprs: []ast.Node{parserS[parserpt-0].node},
Posx: parserS[parserpt-0].node.Pos(),
Exprs: []ast.Node{parserDollar[1].node},
Posx: parserDollar[1].node.Pos(),
}
}
}
}
case 3:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:66
{
parserVAL.node = parserS[parserpt-0].node
parserVAL.node = parserDollar[1].node
}
case 4:
parserDollar = parserS[parserpt-2 : parserpt+1]
//line lang.y:70
{
var result []ast.Node
if c, ok := parserS[parserpt-1].node.(*ast.Concat); ok {
result = append(c.Exprs, parserS[parserpt-0].node)
if c, ok := parserDollar[1].node.(*ast.Concat); ok {
result = append(c.Exprs, parserDollar[2].node)
} else {
result = []ast.Node{parserS[parserpt-1].node, parserS[parserpt-0].node}
result = []ast.Node{parserDollar[1].node, parserDollar[2].node}
}
parserVAL.node = &ast.Concat{
@ -395,89 +517,103 @@ parserdefault:
}
}
case 5:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:86
{
parserVAL.node = parserS[parserpt-0].node
parserVAL.node = parserDollar[1].node
}
case 6:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:90
{
parserVAL.node = parserS[parserpt-0].node
parserVAL.node = parserDollar[1].node
}
case 7:
parserDollar = parserS[parserpt-3 : parserpt+1]
//line lang.y:96
{
parserVAL.node = parserS[parserpt-1].node
parserVAL.node = parserDollar[2].node
}
case 8:
parserDollar = parserS[parserpt-3 : parserpt+1]
//line lang.y:102
{
parserVAL.node = parserS[parserpt-1].node
parserVAL.node = parserDollar[2].node
}
case 9:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:106
{
parserVAL.node = parserS[parserpt-0].node
parserVAL.node = parserDollar[1].node
}
case 10:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:110
{
parserVAL.node = &ast.LiteralNode{
Value: parserS[parserpt-0].token.Value.(int),
Value: parserDollar[1].token.Value.(int),
Typex: ast.TypeInt,
Posx: parserS[parserpt-0].token.Pos,
Posx: parserDollar[1].token.Pos,
}
}
case 11:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:118
{
parserVAL.node = &ast.LiteralNode{
Value: parserS[parserpt-0].token.Value.(float64),
Value: parserDollar[1].token.Value.(float64),
Typex: ast.TypeFloat,
Posx: parserS[parserpt-0].token.Pos,
Posx: parserDollar[1].token.Pos,
}
}
case 12:
parserDollar = parserS[parserpt-3 : parserpt+1]
//line lang.y:126
{
parserVAL.node = &ast.Arithmetic{
Op: parserS[parserpt-1].token.Value.(ast.ArithmeticOp),
Exprs: []ast.Node{parserS[parserpt-2].node, parserS[parserpt-0].node},
Posx: parserS[parserpt-2].node.Pos(),
Op: parserDollar[2].token.Value.(ast.ArithmeticOp),
Exprs: []ast.Node{parserDollar[1].node, parserDollar[3].node},
Posx: parserDollar[1].node.Pos(),
}
}
case 13:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:134
{
parserVAL.node = &ast.VariableAccess{Name: parserS[parserpt-0].token.Value.(string), Posx: parserS[parserpt-0].token.Pos}
parserVAL.node = &ast.VariableAccess{Name: parserDollar[1].token.Value.(string), Posx: parserDollar[1].token.Pos}
}
case 14:
parserDollar = parserS[parserpt-4 : parserpt+1]
//line lang.y:138
{
parserVAL.node = &ast.Call{Func: parserS[parserpt-3].token.Value.(string), Args: parserS[parserpt-1].nodeList, Posx: parserS[parserpt-3].token.Pos}
parserVAL.node = &ast.Call{Func: parserDollar[1].token.Value.(string), Args: parserDollar[3].nodeList, Posx: parserDollar[1].token.Pos}
}
case 15:
parserDollar = parserS[parserpt-0 : parserpt+1]
//line lang.y:143
{
parserVAL.nodeList = nil
}
case 16:
parserDollar = parserS[parserpt-3 : parserpt+1]
//line lang.y:147
{
parserVAL.nodeList = append(parserS[parserpt-2].nodeList, parserS[parserpt-0].node)
parserVAL.nodeList = append(parserDollar[1].nodeList, parserDollar[3].node)
}
case 17:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:151
{
parserVAL.nodeList = append(parserVAL.nodeList, parserS[parserpt-0].node)
parserVAL.nodeList = append(parserVAL.nodeList, parserDollar[1].node)
}
case 18:
parserDollar = parserS[parserpt-1 : parserpt+1]
//line lang.y:157
{
parserVAL.node = &ast.LiteralNode{
Value: parserS[parserpt-0].token.Value.(string),
Value: parserDollar[1].token.Value.(string),
Typex: ast.TypeString,
Posx: parserS[parserpt-0].token.Pos,
Posx: parserDollar[1].token.Pos,
}
}
}