feat: support TOML 1.1

Assisted-by: GLM 5.3 Flash

parser.go

@@ -598,10 +598,16 @@ func (p *parser) readEscape() (rune, error) {
 		return '\f', nil
 	case 'r':
 		return '\r', nil
+	case 'e':
+		// TOML 1.1: the escape character.
+		return '\x1b', nil
 	case '"':
 		return '"', nil
 	case '\\':
 		return '\\', nil
+	case 'x':
+		// TOML 1.1: two hex digits, code points 0x00 through 0xFF.
+		return p.readUnicode(2)
 	case 'u':
 		return p.readUnicode(4)
 	case 'U':
@@ -633,7 +639,7 @@ func (p *parser) parseArray() (any, error) {
 	p.next() // '['
 	arr := []any{}
 	for {
-		if err := p.skipArraySpace(); err != nil {
+		if err := p.skipNestedSpace(); err != nil {
 			return nil, err
 		}
 		if p.eof() {
@@ -648,7 +654,7 @@ func (p *parser) parseArray() (any, error) {
 			return nil, err
 		}
 		arr = append(arr, v)
-		if err := p.skipArraySpace(); err != nil {
+		if err := p.skipNestedSpace(); err != nil {
 			return nil, err
 		}
 		if p.eof() {
@@ -670,13 +676,20 @@ func (p *parser) parseInlineTable() (any, error) {
 	p.next() // '{'
 	tbl := map[string]any{}
 	assigned := map[string]bool{}
-	p.skipInline()
+	// TOML 1.1 lets an inline table span lines: interior whitespace includes
+	// newlines and comments, and a trailing comma is allowed before the
+	// closing brace.
+	if err := p.skipNestedSpace(); err != nil {
+		return nil, err
+	}
 	if !p.eof() && p.peek() == '}' {
 		p.next()
 		return tbl, nil
 	}
 	for {
-		p.skipInline()
+		if err := p.skipNestedSpace(); err != nil {
+			return nil, err
+		}
 		key, err := p.parseKeyPath()
 		if err != nil {
 			return nil, err
@@ -720,13 +733,22 @@ func (p *parser) parseInlineTable() (any, error) {
 		dest[leaf] = val
 		assigned[pathKey(path)] = true
 
-		p.skipInline()
+		if err := p.skipNestedSpace(); err != nil {
+			return nil, err
+		}
 		if p.eof() {
 			return nil, p.errf("unterminated inline table")
 		}
 		switch p.peek() {
 		case ',':
 			p.next()
+			if err := p.skipNestedSpace(); err != nil {
+				return nil, err
+			}
+			if !p.eof() && p.peek() == '}' {
+				p.next()
+				return tbl, nil
+			}
 		case '}':
 			p.next()
 			return tbl, nil
@@ -796,8 +818,9 @@ func (p *parser) skipInline() {
 	}
 }
 
-// skipArraySpace consumes whitespace, newlines, and comments inside arrays.
-func (p *parser) skipArraySpace() error {
+// skipNestedSpace consumes whitespace, newlines, and comments inside a value
+// container (an array, or an inline table under TOML 1.1).
+func (p *parser) skipNestedSpace() error {
 	for !p.eof() {
 		switch p.peek() {
 		case ' ', '\t':