3.3 strings
......
A string can be mutable or immutable. When an immutable string is provided to a procedure like string-set!, the exn:fail:contract exception is raised. String constants generated by the default reader (see Reading Strings) are immutable.
12.6.6 Reading Strings
When the reader encounters ", it begins parsing characters to form a string. The string continues until it is terminated by another "
欢迎光临 Chinaunix (http://bbs.chinaunix.net/) | Powered by Discuz! X3.2 |