740 lines
20 KiB
Go
740 lines
20 KiB
Go
|
package toml
|
||
|
|
||
|
import (
|
||
|
"errors"
|
||
|
"fmt"
|
||
|
"strconv"
|
||
|
"strings"
|
||
|
"time"
|
||
|
"unicode/utf8"
|
||
|
|
||
|
"github.com/BurntSushi/toml/internal"
|
||
|
)
|
||
|
|
||
|
type parser struct {
|
||
|
mapping map[string]interface{}
|
||
|
types map[string]tomlType
|
||
|
lx *lexer
|
||
|
|
||
|
ordered []Key // List of keys in the order that they appear in the TOML data.
|
||
|
context Key // Full key for the current hash in scope.
|
||
|
currentKey string // Base key name for everything except hashes.
|
||
|
approxLine int // Rough approximation of line number
|
||
|
implicits map[string]bool // Record implied keys (e.g. 'key.group.names').
|
||
|
}
|
||
|
|
||
|
// ParseError is used when a file can't be parsed: for example invalid integer
|
||
|
// literals, duplicate keys, etc.
|
||
|
type ParseError struct {
|
||
|
Message string
|
||
|
Line int
|
||
|
LastKey string
|
||
|
}
|
||
|
|
||
|
func (pe ParseError) Error() string {
|
||
|
return fmt.Sprintf("Near line %d (last key parsed '%s'): %s",
|
||
|
pe.Line, pe.LastKey, pe.Message)
|
||
|
}
|
||
|
|
||
|
func parse(data string) (p *parser, err error) {
|
||
|
defer func() {
|
||
|
if r := recover(); r != nil {
|
||
|
var ok bool
|
||
|
if err, ok = r.(ParseError); ok {
|
||
|
return
|
||
|
}
|
||
|
panic(r)
|
||
|
}
|
||
|
}()
|
||
|
|
||
|
// Read over BOM; do this here as the lexer calls utf8.DecodeRuneInString()
|
||
|
// which mangles stuff.
|
||
|
if strings.HasPrefix(data, "\xff\xfe") || strings.HasPrefix(data, "\xfe\xff") {
|
||
|
data = data[2:]
|
||
|
}
|
||
|
|
||
|
// Examine first few bytes for NULL bytes; this probably means it's a UTF-16
|
||
|
// file (second byte in surrogate pair being NULL). Again, do this here to
|
||
|
// avoid having to deal with UTF-8/16 stuff in the lexer.
|
||
|
ex := 6
|
||
|
if len(data) < 6 {
|
||
|
ex = len(data)
|
||
|
}
|
||
|
if strings.ContainsRune(data[:ex], 0) {
|
||
|
return nil, errors.New("files cannot contain NULL bytes; probably using UTF-16; TOML files must be UTF-8")
|
||
|
}
|
||
|
|
||
|
p = &parser{
|
||
|
mapping: make(map[string]interface{}),
|
||
|
types: make(map[string]tomlType),
|
||
|
lx: lex(data),
|
||
|
ordered: make([]Key, 0),
|
||
|
implicits: make(map[string]bool),
|
||
|
}
|
||
|
for {
|
||
|
item := p.next()
|
||
|
if item.typ == itemEOF {
|
||
|
break
|
||
|
}
|
||
|
p.topLevel(item)
|
||
|
}
|
||
|
|
||
|
return p, nil
|
||
|
}
|
||
|
|
||
|
func (p *parser) panicf(format string, v ...interface{}) {
|
||
|
msg := fmt.Sprintf(format, v...)
|
||
|
panic(ParseError{
|
||
|
Message: msg,
|
||
|
Line: p.approxLine,
|
||
|
LastKey: p.current(),
|
||
|
})
|
||
|
}
|
||
|
|
||
|
func (p *parser) next() item {
|
||
|
it := p.lx.nextItem()
|
||
|
//fmt.Printf("ITEM %-18s line %-3d │ %q\n", it.typ, it.line, it.val)
|
||
|
if it.typ == itemError {
|
||
|
p.panicf("%s", it.val)
|
||
|
}
|
||
|
return it
|
||
|
}
|
||
|
|
||
|
func (p *parser) bug(format string, v ...interface{}) {
|
||
|
panic(fmt.Sprintf("BUG: "+format+"\n\n", v...))
|
||
|
}
|
||
|
|
||
|
func (p *parser) expect(typ itemType) item {
|
||
|
it := p.next()
|
||
|
p.assertEqual(typ, it.typ)
|
||
|
return it
|
||
|
}
|
||
|
|
||
|
func (p *parser) assertEqual(expected, got itemType) {
|
||
|
if expected != got {
|
||
|
p.bug("Expected '%s' but got '%s'.", expected, got)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
func (p *parser) topLevel(item item) {
|
||
|
switch item.typ {
|
||
|
case itemCommentStart: // # ..
|
||
|
p.approxLine = item.line
|
||
|
p.expect(itemText)
|
||
|
case itemTableStart: // [ .. ]
|
||
|
name := p.next()
|
||
|
p.approxLine = name.line
|
||
|
|
||
|
var key Key
|
||
|
for ; name.typ != itemTableEnd && name.typ != itemEOF; name = p.next() {
|
||
|
key = append(key, p.keyString(name))
|
||
|
}
|
||
|
p.assertEqual(itemTableEnd, name.typ)
|
||
|
|
||
|
p.addContext(key, false)
|
||
|
p.setType("", tomlHash)
|
||
|
p.ordered = append(p.ordered, key)
|
||
|
case itemArrayTableStart: // [[ .. ]]
|
||
|
name := p.next()
|
||
|
p.approxLine = name.line
|
||
|
|
||
|
var key Key
|
||
|
for ; name.typ != itemArrayTableEnd && name.typ != itemEOF; name = p.next() {
|
||
|
key = append(key, p.keyString(name))
|
||
|
}
|
||
|
p.assertEqual(itemArrayTableEnd, name.typ)
|
||
|
|
||
|
p.addContext(key, true)
|
||
|
p.setType("", tomlArrayHash)
|
||
|
p.ordered = append(p.ordered, key)
|
||
|
case itemKeyStart: // key = ..
|
||
|
outerContext := p.context
|
||
|
/// Read all the key parts (e.g. 'a' and 'b' in 'a.b')
|
||
|
k := p.next()
|
||
|
p.approxLine = k.line
|
||
|
var key Key
|
||
|
for ; k.typ != itemKeyEnd && k.typ != itemEOF; k = p.next() {
|
||
|
key = append(key, p.keyString(k))
|
||
|
}
|
||
|
p.assertEqual(itemKeyEnd, k.typ)
|
||
|
|
||
|
/// The current key is the last part.
|
||
|
p.currentKey = key[len(key)-1]
|
||
|
|
||
|
/// All the other parts (if any) are the context; need to set each part
|
||
|
/// as implicit.
|
||
|
context := key[:len(key)-1]
|
||
|
for i := range context {
|
||
|
p.addImplicitContext(append(p.context, context[i:i+1]...))
|
||
|
}
|
||
|
|
||
|
/// Set value.
|
||
|
val, typ := p.value(p.next(), false)
|
||
|
p.set(p.currentKey, val, typ)
|
||
|
p.ordered = append(p.ordered, p.context.add(p.currentKey))
|
||
|
|
||
|
/// Remove the context we added (preserving any context from [tbl] lines).
|
||
|
p.context = outerContext
|
||
|
p.currentKey = ""
|
||
|
default:
|
||
|
p.bug("Unexpected type at top level: %s", item.typ)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// Gets a string for a key (or part of a key in a table name).
|
||
|
func (p *parser) keyString(it item) string {
|
||
|
switch it.typ {
|
||
|
case itemText:
|
||
|
return it.val
|
||
|
case itemString, itemMultilineString,
|
||
|
itemRawString, itemRawMultilineString:
|
||
|
s, _ := p.value(it, false)
|
||
|
return s.(string)
|
||
|
default:
|
||
|
p.bug("Unexpected key type: %s", it.typ)
|
||
|
}
|
||
|
panic("unreachable")
|
||
|
}
|
||
|
|
||
|
var datetimeRepl = strings.NewReplacer(
|
||
|
"z", "Z",
|
||
|
"t", "T",
|
||
|
" ", "T")
|
||
|
|
||
|
// value translates an expected value from the lexer into a Go value wrapped
|
||
|
// as an empty interface.
|
||
|
func (p *parser) value(it item, parentIsArray bool) (interface{}, tomlType) {
|
||
|
switch it.typ {
|
||
|
case itemString:
|
||
|
return p.replaceEscapes(it.val), p.typeOfPrimitive(it)
|
||
|
case itemMultilineString:
|
||
|
return p.replaceEscapes(stripFirstNewline(stripEscapedNewlines(it.val))), p.typeOfPrimitive(it)
|
||
|
case itemRawString:
|
||
|
return it.val, p.typeOfPrimitive(it)
|
||
|
case itemRawMultilineString:
|
||
|
return stripFirstNewline(it.val), p.typeOfPrimitive(it)
|
||
|
case itemInteger:
|
||
|
return p.valueInteger(it)
|
||
|
case itemFloat:
|
||
|
return p.valueFloat(it)
|
||
|
case itemBool:
|
||
|
switch it.val {
|
||
|
case "true":
|
||
|
return true, p.typeOfPrimitive(it)
|
||
|
case "false":
|
||
|
return false, p.typeOfPrimitive(it)
|
||
|
default:
|
||
|
p.bug("Expected boolean value, but got '%s'.", it.val)
|
||
|
}
|
||
|
case itemDatetime:
|
||
|
return p.valueDatetime(it)
|
||
|
case itemArray:
|
||
|
return p.valueArray(it)
|
||
|
case itemInlineTableStart:
|
||
|
return p.valueInlineTable(it, parentIsArray)
|
||
|
default:
|
||
|
p.bug("Unexpected value type: %s", it.typ)
|
||
|
}
|
||
|
panic("unreachable")
|
||
|
}
|
||
|
|
||
|
func (p *parser) valueInteger(it item) (interface{}, tomlType) {
|
||
|
if !numUnderscoresOK(it.val) {
|
||
|
p.panicf("Invalid integer %q: underscores must be surrounded by digits", it.val)
|
||
|
}
|
||
|
if numHasLeadingZero(it.val) {
|
||
|
p.panicf("Invalid integer %q: cannot have leading zeroes", it.val)
|
||
|
}
|
||
|
|
||
|
num, err := strconv.ParseInt(it.val, 0, 64)
|
||
|
if err != nil {
|
||
|
// Distinguish integer values. Normally, it'd be a bug if the lexer
|
||
|
// provides an invalid integer, but it's possible that the number is
|
||
|
// out of range of valid values (which the lexer cannot determine).
|
||
|
// So mark the former as a bug but the latter as a legitimate user
|
||
|
// error.
|
||
|
if e, ok := err.(*strconv.NumError); ok && e.Err == strconv.ErrRange {
|
||
|
p.panicf("Integer '%s' is out of the range of 64-bit signed integers.", it.val)
|
||
|
} else {
|
||
|
p.bug("Expected integer value, but got '%s'.", it.val)
|
||
|
}
|
||
|
}
|
||
|
return num, p.typeOfPrimitive(it)
|
||
|
}
|
||
|
|
||
|
func (p *parser) valueFloat(it item) (interface{}, tomlType) {
|
||
|
parts := strings.FieldsFunc(it.val, func(r rune) bool {
|
||
|
switch r {
|
||
|
case '.', 'e', 'E':
|
||
|
return true
|
||
|
}
|
||
|
return false
|
||
|
})
|
||
|
for _, part := range parts {
|
||
|
if !numUnderscoresOK(part) {
|
||
|
p.panicf("Invalid float %q: underscores must be surrounded by digits", it.val)
|
||
|
}
|
||
|
}
|
||
|
if len(parts) > 0 && numHasLeadingZero(parts[0]) {
|
||
|
p.panicf("Invalid float %q: cannot have leading zeroes", it.val)
|
||
|
}
|
||
|
if !numPeriodsOK(it.val) {
|
||
|
// As a special case, numbers like '123.' or '1.e2',
|
||
|
// which are valid as far as Go/strconv are concerned,
|
||
|
// must be rejected because TOML says that a fractional
|
||
|
// part consists of '.' followed by 1+ digits.
|
||
|
p.panicf("Invalid float %q: '.' must be followed by one or more digits", it.val)
|
||
|
}
|
||
|
val := strings.Replace(it.val, "_", "", -1)
|
||
|
if val == "+nan" || val == "-nan" { // Go doesn't support this, but TOML spec does.
|
||
|
val = "nan"
|
||
|
}
|
||
|
num, err := strconv.ParseFloat(val, 64)
|
||
|
if err != nil {
|
||
|
if e, ok := err.(*strconv.NumError); ok && e.Err == strconv.ErrRange {
|
||
|
p.panicf("Float '%s' is out of the range of 64-bit IEEE-754 floating-point numbers.", it.val)
|
||
|
} else {
|
||
|
p.panicf("Invalid float value: %q", it.val)
|
||
|
}
|
||
|
}
|
||
|
return num, p.typeOfPrimitive(it)
|
||
|
}
|
||
|
|
||
|
var dtTypes = []struct {
|
||
|
fmt string
|
||
|
zone *time.Location
|
||
|
}{
|
||
|
{time.RFC3339Nano, time.Local},
|
||
|
{"2006-01-02T15:04:05.999999999", internal.LocalDatetime},
|
||
|
{"2006-01-02", internal.LocalDate},
|
||
|
{"15:04:05.999999999", internal.LocalTime},
|
||
|
}
|
||
|
|
||
|
func (p *parser) valueDatetime(it item) (interface{}, tomlType) {
|
||
|
it.val = datetimeRepl.Replace(it.val)
|
||
|
var (
|
||
|
t time.Time
|
||
|
ok bool
|
||
|
err error
|
||
|
)
|
||
|
for _, dt := range dtTypes {
|
||
|
t, err = time.ParseInLocation(dt.fmt, it.val, dt.zone)
|
||
|
if err == nil {
|
||
|
ok = true
|
||
|
break
|
||
|
}
|
||
|
}
|
||
|
if !ok {
|
||
|
p.panicf("Invalid TOML Datetime: %q.", it.val)
|
||
|
}
|
||
|
return t, p.typeOfPrimitive(it)
|
||
|
}
|
||
|
|
||
|
func (p *parser) valueArray(it item) (interface{}, tomlType) {
|
||
|
p.setType(p.currentKey, tomlArray)
|
||
|
|
||
|
// p.setType(p.currentKey, typ)
|
||
|
var (
|
||
|
array []interface{}
|
||
|
types []tomlType
|
||
|
)
|
||
|
for it = p.next(); it.typ != itemArrayEnd; it = p.next() {
|
||
|
if it.typ == itemCommentStart {
|
||
|
p.expect(itemText)
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
val, typ := p.value(it, true)
|
||
|
array = append(array, val)
|
||
|
types = append(types, typ)
|
||
|
}
|
||
|
return array, tomlArray
|
||
|
}
|
||
|
|
||
|
func (p *parser) valueInlineTable(it item, parentIsArray bool) (interface{}, tomlType) {
|
||
|
var (
|
||
|
hash = make(map[string]interface{})
|
||
|
outerContext = p.context
|
||
|
outerKey = p.currentKey
|
||
|
)
|
||
|
|
||
|
p.context = append(p.context, p.currentKey)
|
||
|
prevContext := p.context
|
||
|
p.currentKey = ""
|
||
|
|
||
|
p.addImplicit(p.context)
|
||
|
p.addContext(p.context, parentIsArray)
|
||
|
|
||
|
/// Loop over all table key/value pairs.
|
||
|
for it := p.next(); it.typ != itemInlineTableEnd; it = p.next() {
|
||
|
if it.typ == itemCommentStart {
|
||
|
p.expect(itemText)
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
/// Read all key parts.
|
||
|
k := p.next()
|
||
|
p.approxLine = k.line
|
||
|
var key Key
|
||
|
for ; k.typ != itemKeyEnd && k.typ != itemEOF; k = p.next() {
|
||
|
key = append(key, p.keyString(k))
|
||
|
}
|
||
|
p.assertEqual(itemKeyEnd, k.typ)
|
||
|
|
||
|
/// The current key is the last part.
|
||
|
p.currentKey = key[len(key)-1]
|
||
|
|
||
|
/// All the other parts (if any) are the context; need to set each part
|
||
|
/// as implicit.
|
||
|
context := key[:len(key)-1]
|
||
|
for i := range context {
|
||
|
p.addImplicitContext(append(p.context, context[i:i+1]...))
|
||
|
}
|
||
|
|
||
|
/// Set the value.
|
||
|
val, typ := p.value(p.next(), false)
|
||
|
p.set(p.currentKey, val, typ)
|
||
|
p.ordered = append(p.ordered, p.context.add(p.currentKey))
|
||
|
hash[p.currentKey] = val
|
||
|
|
||
|
/// Restore context.
|
||
|
p.context = prevContext
|
||
|
}
|
||
|
p.context = outerContext
|
||
|
p.currentKey = outerKey
|
||
|
return hash, tomlHash
|
||
|
}
|
||
|
|
||
|
// numHasLeadingZero checks if this number has leading zeroes, allowing for '0',
|
||
|
// +/- signs, and base prefixes.
|
||
|
func numHasLeadingZero(s string) bool {
|
||
|
if len(s) > 1 && s[0] == '0' && isDigit(rune(s[1])) { // >1 to allow "0" and isDigit to allow 0x
|
||
|
return true
|
||
|
}
|
||
|
if len(s) > 2 && (s[0] == '-' || s[0] == '+') && s[1] == '0' {
|
||
|
return true
|
||
|
}
|
||
|
return false
|
||
|
}
|
||
|
|
||
|
// numUnderscoresOK checks whether each underscore in s is surrounded by
|
||
|
// characters that are not underscores.
|
||
|
func numUnderscoresOK(s string) bool {
|
||
|
switch s {
|
||
|
case "nan", "+nan", "-nan", "inf", "-inf", "+inf":
|
||
|
return true
|
||
|
}
|
||
|
accept := false
|
||
|
for _, r := range s {
|
||
|
if r == '_' {
|
||
|
if !accept {
|
||
|
return false
|
||
|
}
|
||
|
}
|
||
|
|
||
|
// isHexadecimal is a superset of all the permissable characters
|
||
|
// surrounding an underscore.
|
||
|
accept = isHexadecimal(r)
|
||
|
}
|
||
|
return accept
|
||
|
}
|
||
|
|
||
|
// numPeriodsOK checks whether every period in s is followed by a digit.
|
||
|
func numPeriodsOK(s string) bool {
|
||
|
period := false
|
||
|
for _, r := range s {
|
||
|
if period && !isDigit(r) {
|
||
|
return false
|
||
|
}
|
||
|
period = r == '.'
|
||
|
}
|
||
|
return !period
|
||
|
}
|
||
|
|
||
|
// Set the current context of the parser, where the context is either a hash or
|
||
|
// an array of hashes, depending on the value of the `array` parameter.
|
||
|
//
|
||
|
// Establishing the context also makes sure that the key isn't a duplicate, and
|
||
|
// will create implicit hashes automatically.
|
||
|
func (p *parser) addContext(key Key, array bool) {
|
||
|
var ok bool
|
||
|
|
||
|
// Always start at the top level and drill down for our context.
|
||
|
hashContext := p.mapping
|
||
|
keyContext := make(Key, 0)
|
||
|
|
||
|
// We only need implicit hashes for key[0:-1]
|
||
|
for _, k := range key[0 : len(key)-1] {
|
||
|
_, ok = hashContext[k]
|
||
|
keyContext = append(keyContext, k)
|
||
|
|
||
|
// No key? Make an implicit hash and move on.
|
||
|
if !ok {
|
||
|
p.addImplicit(keyContext)
|
||
|
hashContext[k] = make(map[string]interface{})
|
||
|
}
|
||
|
|
||
|
// If the hash context is actually an array of tables, then set
|
||
|
// the hash context to the last element in that array.
|
||
|
//
|
||
|
// Otherwise, it better be a table, since this MUST be a key group (by
|
||
|
// virtue of it not being the last element in a key).
|
||
|
switch t := hashContext[k].(type) {
|
||
|
case []map[string]interface{}:
|
||
|
hashContext = t[len(t)-1]
|
||
|
case map[string]interface{}:
|
||
|
hashContext = t
|
||
|
default:
|
||
|
p.panicf("Key '%s' was already created as a hash.", keyContext)
|
||
|
}
|
||
|
}
|
||
|
|
||
|
p.context = keyContext
|
||
|
if array {
|
||
|
// If this is the first element for this array, then allocate a new
|
||
|
// list of tables for it.
|
||
|
k := key[len(key)-1]
|
||
|
if _, ok := hashContext[k]; !ok {
|
||
|
hashContext[k] = make([]map[string]interface{}, 0, 4)
|
||
|
}
|
||
|
|
||
|
// Add a new table. But make sure the key hasn't already been used
|
||
|
// for something else.
|
||
|
if hash, ok := hashContext[k].([]map[string]interface{}); ok {
|
||
|
hashContext[k] = append(hash, make(map[string]interface{}))
|
||
|
} else {
|
||
|
p.panicf("Key '%s' was already created and cannot be used as an array.", keyContext)
|
||
|
}
|
||
|
} else {
|
||
|
p.setValue(key[len(key)-1], make(map[string]interface{}))
|
||
|
}
|
||
|
p.context = append(p.context, key[len(key)-1])
|
||
|
}
|
||
|
|
||
|
// set calls setValue and setType.
|
||
|
func (p *parser) set(key string, val interface{}, typ tomlType) {
|
||
|
p.setValue(p.currentKey, val)
|
||
|
p.setType(p.currentKey, typ)
|
||
|
}
|
||
|
|
||
|
// setValue sets the given key to the given value in the current context.
|
||
|
// It will make sure that the key hasn't already been defined, account for
|
||
|
// implicit key groups.
|
||
|
func (p *parser) setValue(key string, value interface{}) {
|
||
|
var (
|
||
|
tmpHash interface{}
|
||
|
ok bool
|
||
|
hash = p.mapping
|
||
|
keyContext Key
|
||
|
)
|
||
|
for _, k := range p.context {
|
||
|
keyContext = append(keyContext, k)
|
||
|
if tmpHash, ok = hash[k]; !ok {
|
||
|
p.bug("Context for key '%s' has not been established.", keyContext)
|
||
|
}
|
||
|
switch t := tmpHash.(type) {
|
||
|
case []map[string]interface{}:
|
||
|
// The context is a table of hashes. Pick the most recent table
|
||
|
// defined as the current hash.
|
||
|
hash = t[len(t)-1]
|
||
|
case map[string]interface{}:
|
||
|
hash = t
|
||
|
default:
|
||
|
p.panicf("Key '%s' has already been defined.", keyContext)
|
||
|
}
|
||
|
}
|
||
|
keyContext = append(keyContext, key)
|
||
|
|
||
|
if _, ok := hash[key]; ok {
|
||
|
// Normally redefining keys isn't allowed, but the key could have been
|
||
|
// defined implicitly and it's allowed to be redefined concretely. (See
|
||
|
// the `valid/implicit-and-explicit-after.toml` in toml-test)
|
||
|
//
|
||
|
// But we have to make sure to stop marking it as an implicit. (So that
|
||
|
// another redefinition provokes an error.)
|
||
|
//
|
||
|
// Note that since it has already been defined (as a hash), we don't
|
||
|
// want to overwrite it. So our business is done.
|
||
|
if p.isArray(keyContext) {
|
||
|
p.removeImplicit(keyContext)
|
||
|
hash[key] = value
|
||
|
return
|
||
|
}
|
||
|
if p.isImplicit(keyContext) {
|
||
|
p.removeImplicit(keyContext)
|
||
|
return
|
||
|
}
|
||
|
|
||
|
// Otherwise, we have a concrete key trying to override a previous
|
||
|
// key, which is *always* wrong.
|
||
|
p.panicf("Key '%s' has already been defined.", keyContext)
|
||
|
}
|
||
|
|
||
|
hash[key] = value
|
||
|
}
|
||
|
|
||
|
// setType sets the type of a particular value at a given key.
|
||
|
// It should be called immediately AFTER setValue.
|
||
|
//
|
||
|
// Note that if `key` is empty, then the type given will be applied to the
|
||
|
// current context (which is either a table or an array of tables).
|
||
|
func (p *parser) setType(key string, typ tomlType) {
|
||
|
keyContext := make(Key, 0, len(p.context)+1)
|
||
|
for _, k := range p.context {
|
||
|
keyContext = append(keyContext, k)
|
||
|
}
|
||
|
if len(key) > 0 { // allow type setting for hashes
|
||
|
keyContext = append(keyContext, key)
|
||
|
}
|
||
|
p.types[keyContext.String()] = typ
|
||
|
}
|
||
|
|
||
|
// Implicit keys need to be created when tables are implied in "a.b.c.d = 1" and
|
||
|
// "[a.b.c]" (the "a", "b", and "c" hashes are never created explicitly).
|
||
|
func (p *parser) addImplicit(key Key) { p.implicits[key.String()] = true }
|
||
|
func (p *parser) removeImplicit(key Key) { p.implicits[key.String()] = false }
|
||
|
func (p *parser) isImplicit(key Key) bool { return p.implicits[key.String()] }
|
||
|
func (p *parser) isArray(key Key) bool { return p.types[key.String()] == tomlArray }
|
||
|
func (p *parser) addImplicitContext(key Key) {
|
||
|
p.addImplicit(key)
|
||
|
p.addContext(key, false)
|
||
|
}
|
||
|
|
||
|
// current returns the full key name of the current context.
|
||
|
func (p *parser) current() string {
|
||
|
if len(p.currentKey) == 0 {
|
||
|
return p.context.String()
|
||
|
}
|
||
|
if len(p.context) == 0 {
|
||
|
return p.currentKey
|
||
|
}
|
||
|
return fmt.Sprintf("%s.%s", p.context, p.currentKey)
|
||
|
}
|
||
|
|
||
|
func stripFirstNewline(s string) string {
|
||
|
if len(s) > 0 && s[0] == '\n' {
|
||
|
return s[1:]
|
||
|
}
|
||
|
if len(s) > 1 && s[0] == '\r' && s[1] == '\n' {
|
||
|
return s[2:]
|
||
|
}
|
||
|
return s
|
||
|
}
|
||
|
|
||
|
// Remove newlines inside triple-quoted strings if a line ends with "\".
|
||
|
func stripEscapedNewlines(s string) string {
|
||
|
split := strings.Split(s, "\n")
|
||
|
if len(split) < 1 {
|
||
|
return s
|
||
|
}
|
||
|
|
||
|
escNL := false // Keep track of the last non-blank line was escaped.
|
||
|
for i, line := range split {
|
||
|
line = strings.TrimRight(line, " \t\r")
|
||
|
|
||
|
if len(line) == 0 || line[len(line)-1] != '\\' {
|
||
|
split[i] = strings.TrimRight(split[i], "\r")
|
||
|
if !escNL && i != len(split)-1 {
|
||
|
split[i] += "\n"
|
||
|
}
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
escBS := true
|
||
|
for j := len(line) - 1; j >= 0 && line[j] == '\\'; j-- {
|
||
|
escBS = !escBS
|
||
|
}
|
||
|
if escNL {
|
||
|
line = strings.TrimLeft(line, " \t\r")
|
||
|
}
|
||
|
escNL = !escBS
|
||
|
|
||
|
if escBS {
|
||
|
split[i] += "\n"
|
||
|
continue
|
||
|
}
|
||
|
|
||
|
split[i] = line[:len(line)-1] // Remove \
|
||
|
if len(split)-1 > i {
|
||
|
split[i+1] = strings.TrimLeft(split[i+1], " \t\r")
|
||
|
}
|
||
|
}
|
||
|
return strings.Join(split, "")
|
||
|
}
|
||
|
|
||
|
func (p *parser) replaceEscapes(str string) string {
|
||
|
var replaced []rune
|
||
|
s := []byte(str)
|
||
|
r := 0
|
||
|
for r < len(s) {
|
||
|
if s[r] != '\\' {
|
||
|
c, size := utf8.DecodeRune(s[r:])
|
||
|
r += size
|
||
|
replaced = append(replaced, c)
|
||
|
continue
|
||
|
}
|
||
|
r += 1
|
||
|
if r >= len(s) {
|
||
|
p.bug("Escape sequence at end of string.")
|
||
|
return ""
|
||
|
}
|
||
|
switch s[r] {
|
||
|
default:
|
||
|
p.bug("Expected valid escape code after \\, but got %q.", s[r])
|
||
|
return ""
|
||
|
case ' ', '\t':
|
||
|
p.panicf("invalid escape: '\\%c'", s[r])
|
||
|
return ""
|
||
|
case 'b':
|
||
|
replaced = append(replaced, rune(0x0008))
|
||
|
r += 1
|
||
|
case 't':
|
||
|
replaced = append(replaced, rune(0x0009))
|
||
|
r += 1
|
||
|
case 'n':
|
||
|
replaced = append(replaced, rune(0x000A))
|
||
|
r += 1
|
||
|
case 'f':
|
||
|
replaced = append(replaced, rune(0x000C))
|
||
|
r += 1
|
||
|
case 'r':
|
||
|
replaced = append(replaced, rune(0x000D))
|
||
|
r += 1
|
||
|
case '"':
|
||
|
replaced = append(replaced, rune(0x0022))
|
||
|
r += 1
|
||
|
case '\\':
|
||
|
replaced = append(replaced, rune(0x005C))
|
||
|
r += 1
|
||
|
case 'u':
|
||
|
// At this point, we know we have a Unicode escape of the form
|
||
|
// `uXXXX` at [r, r+5). (Because the lexer guarantees this
|
||
|
// for us.)
|
||
|
escaped := p.asciiEscapeToUnicode(s[r+1 : r+5])
|
||
|
replaced = append(replaced, escaped)
|
||
|
r += 5
|
||
|
case 'U':
|
||
|
// At this point, we know we have a Unicode escape of the form
|
||
|
// `uXXXX` at [r, r+9). (Because the lexer guarantees this
|
||
|
// for us.)
|
||
|
escaped := p.asciiEscapeToUnicode(s[r+1 : r+9])
|
||
|
replaced = append(replaced, escaped)
|
||
|
r += 9
|
||
|
}
|
||
|
}
|
||
|
return string(replaced)
|
||
|
}
|
||
|
|
||
|
func (p *parser) asciiEscapeToUnicode(bs []byte) rune {
|
||
|
s := string(bs)
|
||
|
hex, err := strconv.ParseUint(strings.ToLower(s), 16, 32)
|
||
|
if err != nil {
|
||
|
p.bug("Could not parse '%s' as a hexadecimal number, but the "+
|
||
|
"lexer claims it's OK: %s", s, err)
|
||
|
}
|
||
|
if !utf8.ValidRune(rune(hex)) {
|
||
|
p.panicf("Escaped character '\\u%s' is not valid UTF-8.", s)
|
||
|
}
|
||
|
return rune(hex)
|
||
|
}
|