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-rw-r--r--vendor/github.com/BurntSushi/toml/parse.go585
1 files changed, 366 insertions, 219 deletions
diff --git a/vendor/github.com/BurntSushi/toml/parse.go b/vendor/github.com/BurntSushi/toml/parse.go
index 50869ef..d9ae5db 100644
--- a/vendor/github.com/BurntSushi/toml/parse.go
+++ b/vendor/github.com/BurntSushi/toml/parse.go
@@ -1,12 +1,14 @@
package toml
import (
+ "errors"
"fmt"
"strconv"
"strings"
"time"
- "unicode"
"unicode/utf8"
+
+ "github.com/BurntSushi/toml/internal"
)
type parser struct {
@@ -14,39 +16,54 @@ type parser struct {
types map[string]tomlType
lx *lexer
- // A list of keys in the order that they appear in the TOML data.
- ordered []Key
-
- // the full key for the current hash in scope
- context Key
-
- // the base key name for everything except hashes
- currentKey string
-
- // rough approximation of line number
- approxLine int
-
- // A map of 'key.group.names' to whether they were created implicitly.
- implicits map[string]bool
+ 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').
}
-type parseError string
+// 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 string(pe)
+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 {
+ 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),
@@ -66,13 +83,17 @@ func parse(data string) (p *parser, err error) {
}
func (p *parser) panicf(format string, v ...interface{}) {
- msg := fmt.Sprintf("Near line %d (last key parsed '%s'): %s",
- p.approxLine, p.current(), fmt.Sprintf(format, v...))
- panic(parseError(msg))
+ 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)
}
@@ -97,44 +118,63 @@ func (p *parser) assertEqual(expected, got itemType) {
func (p *parser) topLevel(item item) {
switch item.typ {
- case itemCommentStart:
+ case itemCommentStart: // # ..
p.approxLine = item.line
p.expect(itemText)
- case itemTableStart:
- kg := p.next()
- p.approxLine = kg.line
+ case itemTableStart: // [ .. ]
+ name := p.next()
+ p.approxLine = name.line
var key Key
- for ; kg.typ != itemTableEnd && kg.typ != itemEOF; kg = p.next() {
- key = append(key, p.keyString(kg))
+ for ; name.typ != itemTableEnd && name.typ != itemEOF; name = p.next() {
+ key = append(key, p.keyString(name))
}
- p.assertEqual(itemTableEnd, kg.typ)
+ p.assertEqual(itemTableEnd, name.typ)
- p.establishContext(key, false)
+ p.addContext(key, false)
p.setType("", tomlHash)
p.ordered = append(p.ordered, key)
- case itemArrayTableStart:
- kg := p.next()
- p.approxLine = kg.line
+ case itemArrayTableStart: // [[ .. ]]
+ name := p.next()
+ p.approxLine = name.line
var key Key
- for ; kg.typ != itemArrayTableEnd && kg.typ != itemEOF; kg = p.next() {
- key = append(key, p.keyString(kg))
+ for ; name.typ != itemArrayTableEnd && name.typ != itemEOF; name = p.next() {
+ key = append(key, p.keyString(name))
}
- p.assertEqual(itemArrayTableEnd, kg.typ)
+ p.assertEqual(itemArrayTableEnd, name.typ)
- p.establishContext(key, true)
+ p.addContext(key, true)
p.setType("", tomlArrayHash)
p.ordered = append(p.ordered, key)
- case itemKeyStart:
- kname := p.next()
- p.approxLine = kname.line
- p.currentKey = p.keyString(kname)
-
- val, typ := p.value(p.next())
- p.setValue(p.currentKey, val)
- p.setType(p.currentKey, typ)
+ 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)
@@ -148,180 +188,253 @@ func (p *parser) keyString(it item) string {
return it.val
case itemString, itemMultilineString,
itemRawString, itemRawMultilineString:
- s, _ := p.value(it)
+ s, _ := p.value(it, false)
return s.(string)
default:
p.bug("Unexpected key type: %s", it.typ)
- panic("unreachable")
}
+ 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) (interface{}, tomlType) {
+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:
- trimmed := stripFirstNewline(stripEscapedWhitespace(it.val))
- return p.replaceEscapes(trimmed), p.typeOfPrimitive(it)
+ 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)
}
- p.bug("Expected boolean value, but got '%s'.", it.val)
- case itemInteger:
- if !numUnderscoresOK(it.val) {
- p.panicf("Invalid integer %q: underscores must be surrounded by digits",
- it.val)
- }
- val := strings.Replace(it.val, "_", "", -1)
- num, err := strconv.ParseInt(val, 10, 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)
- }
+ 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)
- case itemFloat:
- 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)
- }
+ }
+ 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
}
- 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)
- 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 false
+ })
+ for _, part := range parts {
+ if !numUnderscoresOK(part) {
+ p.panicf("Invalid float %q: underscores must be surrounded by digits", it.val)
}
- return num, p.typeOfPrimitive(it)
- case itemDatetime:
- var t time.Time
- var ok bool
- var err error
- for _, format := range []string{
- "2006-01-02T15:04:05Z07:00",
- "2006-01-02T15:04:05",
- "2006-01-02",
- } {
- t, err = time.ParseInLocation(format, it.val, time.Local)
- if err == nil {
- ok = true
- break
- }
+ }
+ 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)
}
- if !ok {
- p.panicf("Invalid TOML Datetime: %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
}
- return t, p.typeOfPrimitive(it)
- case itemArray:
- array := make([]interface{}, 0)
- types := make([]tomlType, 0)
+ }
+ if !ok {
+ p.panicf("Invalid TOML Datetime: %q.", it.val)
+ }
+ return t, p.typeOfPrimitive(it)
+}
- for it = p.next(); it.typ != itemArrayEnd; it = p.next() {
- if it.typ == itemCommentStart {
- p.expect(itemText)
- continue
- }
+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)
- val, typ := p.value(it)
- array = append(array, val)
- types = append(types, typ)
+ /// 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
}
- return array, p.typeOfArray(types)
- case itemInlineTableStart:
- var (
- hash = make(map[string]interface{})
- outerContext = p.context
- outerKey = p.currentKey
- )
- p.context = append(p.context, p.currentKey)
- p.currentKey = ""
- for it := p.next(); it.typ != itemInlineTableEnd; it = p.next() {
- if it.typ != itemKeyStart {
- p.bug("Expected key start but instead found %q, around line %d",
- it.val, p.approxLine)
- }
- 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)
- // retrieve key
- k := p.next()
- p.approxLine = k.line
- kname := p.keyString(k)
+ /// The current key is the last part.
+ p.currentKey = key[len(key)-1]
- // retrieve value
- p.currentKey = kname
- val, typ := p.value(p.next())
- // make sure we keep metadata up to date
- p.setType(kname, typ)
- p.ordered = append(p.ordered, p.context.add(p.currentKey))
- hash[kname] = val
+ /// 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]...))
}
- p.context = outerContext
- p.currentKey = outerKey
- return hash, tomlHash
+
+ /// 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.bug("Unexpected value type: %s", it.typ)
- panic("unreachable")
+ 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
}
- accept = false
- continue
}
- accept = true
+
+ // isHexadecimal is a superset of all the permissable characters
+ // surrounding an underscore.
+ accept = isHexadecimal(r)
}
return accept
}
@@ -338,13 +451,12 @@ func numPeriodsOK(s string) bool {
return !period
}
-// establishContext sets the current context of the parser,
-// where the context is either a hash or an array of hashes. Which one is
-// set depends on the value of the `array` parameter.
+// 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) establishContext(key Key, array bool) {
+func (p *parser) addContext(key Key, array bool) {
var ok bool
// Always start at the top level and drill down for our context.
@@ -383,7 +495,7 @@ func (p *parser) establishContext(key Key, array bool) {
// list of tables for it.
k := key[len(key)-1]
if _, ok := hashContext[k]; !ok {
- hashContext[k] = make([]map[string]interface{}, 0, 5)
+ hashContext[k] = make([]map[string]interface{}, 0, 4)
}
// Add a new table. But make sure the key hasn't already been used
@@ -391,8 +503,7 @@ func (p *parser) establishContext(key Key, array bool) {
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)
+ 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{}))
@@ -400,15 +511,22 @@ func (p *parser) establishContext(key Key, array bool) {
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{}
- var ok bool
-
- hash := p.mapping
- keyContext := make(Key, 0)
+ 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 {
@@ -422,24 +540,26 @@ func (p *parser) setValue(key string, value interface{}) {
case map[string]interface{}:
hash = t
default:
- p.bug("Expected hash to have type 'map[string]interface{}', but "+
- "it has '%T' instead.", tmpHash)
+ p.panicf("Key '%s' has already been defined.", keyContext)
}
}
keyContext = append(keyContext, key)
if _, ok := hash[key]; ok {
- // Typically, if the given key has already been set, then we have
- // to raise an error since duplicate keys are disallowed. However,
- // it's possible that a key was previously defined implicitly. In this
- // case, it is allowed to be redefined concretely. (See the
- // `tests/valid/implicit-and-explicit-after.toml` test in `toml-test`.)
+ // 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
@@ -449,6 +569,7 @@ func (p *parser) setValue(key string, value interface{}) {
// key, which is *always* wrong.
p.panicf("Key '%s' has already been defined.", keyContext)
}
+
hash[key] = value
}
@@ -468,21 +589,15 @@ func (p *parser) setType(key string, typ tomlType) {
p.types[keyContext.String()] = typ
}
-// addImplicit sets the given Key as having been created implicitly.
-func (p *parser) addImplicit(key Key) {
- p.implicits[key.String()] = true
-}
-
-// removeImplicit stops tagging the given key as having been implicitly
-// created.
-func (p *parser) removeImplicit(key Key) {
- p.implicits[key.String()] = false
-}
-
-// isImplicit returns true if the key group pointed to by the key was created
-// implicitly.
-func (p *parser) isImplicit(key Key) bool {
- return p.implicits[key.String()]
+// 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.
@@ -497,20 +612,54 @@ func (p *parser) current() string {
}
func stripFirstNewline(s string) string {
- if len(s) == 0 || s[0] != '\n' {
- return s
+ 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[1:]
+ return s
}
-func stripEscapedWhitespace(s string) string {
- esc := strings.Split(s, "\\\n")
- if len(esc) > 1 {
- for i := 1; i < len(esc); i++ {
- esc[i] = strings.TrimLeftFunc(esc[i], unicode.IsSpace)
+// 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(esc, "")
+ return strings.Join(split, "")
}
func (p *parser) replaceEscapes(str string) string {
@@ -533,6 +682,9 @@ func (p *parser) replaceEscapes(str string) string {
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
@@ -585,8 +737,3 @@ func (p *parser) asciiEscapeToUnicode(bs []byte) rune {
}
return rune(hex)
}
-
-func isStringType(ty itemType) bool {
- return ty == itemString || ty == itemMultilineString ||
- ty == itemRawString || ty == itemRawMultilineString
-}
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