Info Catalog elisp: Nonprinting Characters elisp: String Type

elisp: Text Props and Strings

 
 2.3.8.4 Text Properties in Strings
 ..................................
 
 A string can hold properties for the characters it contains, in addition
 to the characters themselves.  This enables programs that copy text
 between strings and buffers to copy the text’s properties with no
 special effort.  Text Properties, for an explanation of what
 text properties mean.  Strings with text properties use a special read
 and print syntax:
 
      #("CHARACTERS" PROPERTY-DATA...)
 
 where PROPERTY-DATA consists of zero or more elements, in groups of
 three as follows:
 
      BEG END PLIST
 
 The elements BEG and END are integers, and together specify a range of
 indices in the string; PLIST is the property list for that range.  For
 example,
 
      #("foo bar" 0 3 (face bold) 3 4 nil 4 7 (face italic))
 
 represents a string whose textual contents are ‘foo bar’, in which the
 first three characters have a ‘face’ property with value ‘bold’, and the
 last three have a ‘face’ property with value ‘italic’.  (The fourth
 character has no text properties, so its property list is ‘nil’.  It is
 not actually necessary to mention ranges with ‘nil’ as the property
 list, since any characters not mentioned in any range will default to
 having no properties.)
 

Info Catalog elisp: Nonprinting Characters elisp: String Type