Node:Read Only Strings, Previous:Shared Substrings, Up:Shared And Read Only Strings
In previous versions of Guile, there was the idea that some string-based
primitives such as string-append could equally accept symbols as
arguments. For example, one could write
(string-append '/home/ 'vigilia)
and get "/home/vigilia" as the result. The term read only
string was adopted to describe the argument type expected by such
primitives.
This idea has now been removed. The predicate read-only-string?
still exists, but deprecated, and is equivalent to
(lambda (x) (or (string? x) (symbol? x)))
But no Guile primitives now use read-only-string? to validate
their arguments.
String-based primitives such as string-append
now require strings:
(string-append '/home/ 'vigilia) => ERROR: Wrong type argument (expecting STRINGP): /home/
| read-only-string? obj | Deprecated Scheme Procedure |
| scm_read_only_string_p (obj) | Deprecated C Function |
Return #t if obj is either a string or a symbol,
otherwise return #f.
|