Reading

Lpp objects can be read and constructed from C++ input streams.

read

Function

read stream

Function

read reads one Lpp object from the C++ input stream stream and returns that object. The syntax of such objects on stream is the same as Common Lisp except with no special dispatching characters such as "#" or quote. Lpp read does ignore semicolon comments to the end of line however. If the stream argument is not provided cin is assumed. For example suppose that we type (to cin) the following:

     red
     "Hello world"
     (1 two 3)
     

Then calling read three times will produce:

     let symbol1 = read();
     let string1 = read();
     let list1 = read();
     symbolp(symbol1) => t
     stringp(string1) => t
     listp(list1) => t
     numberp(first(list1)) => t
     list(symbol1, string1, list1)
             => (red "Hello world" (1 two 3))
     

readFromString string

Function

The argument string is either a char* string or an Lpp String object. readFromString is the same as read but uses the string string instead of a C++ stream. For example:

     let symbol1 = readFromString("red");
     let string1 = readFromString("\"Hello world\"");
     let list1 = readFromString("(1 two 3")
     symbolp(symbol1) => t
     stringp(string1) => t
     listp(list1) => t
     numberp(first(list1)) => t
     list(symbol1, string1, list1)
             => (red "Hello world" (1 two 3))