func (parser *Parser) parseArgsTable() *ast.ArgsTable {
token := parser.peek()
if token.Type != lexer.TokenType('(') {
return nil
}
parser.next()
token = parser.peek()
if token.Value == lexer.TokenType(')') {
return ast.NewArgsTable(true)
}
token = parser.peek()
start := token.Start
end := token.End
var args *ast.ArgsTable
// this is named args table
if token.Type == lexer.TokenLABEL {
args = ast.NewArgsTable(true)
for {
token := parser.expectf(lexer.TokenLABEL, "expect arg label")
label := token.Value.(string)
arg := parser.expectArg("expect label(%s) value", label)
parser.D("lable:%s", label)
namedArg := ast.NewNamedArg(label, arg)
_, end = Pos(arg)
_setNodePos(namedArg, token.Start, end)
args.Append(namedArg)
if parser.peek().Type != lexer.TokenType(',') {
break
}
parser.next()
}
} else {
args = ast.NewArgsTable(false)
for {
arg := parser.expectArg("expect arg")
args.Append(arg)
if parser.peek().Type != lexer.TokenType(',') {
break
}
parser.next()
}
}
_setNodePos(args, start, end)
parser.expectf(lexer.TokenType(')'), "arg table must end with ')'")
return args
}
