string.f90

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Data Types
type	string
	Represents text as a sequence of ASCII code units. The derived type wraps an allocatable character array. More...
interface	len
	Return the length of a string object. More...
interface	len_trim
	Return the trimmed length of a string object. More...
interface	trim
	Remove trailing blanks from a string object. More...
interface	operator(//)
	Concatenate string and character expressions. More...
interface	operator(.contains.)
	Test whether a value is present in an array. More...
interface	index
	Locate the position of a substring. More...

Functions/Subroutines
logical function, public	starts_with (str, arg1, idx)
	Checks if a string starts with a given prefix Returns .true. if the string str (after trimming leading/trailing whitespace) begins exactly with the substring arg1. The function uses index() after trimming both strings with trim(adjustl()).
character function, public	head (str)
	Returns the first character of the trimmed string.
character function, public	tail (str)
	Returns the last non-blank character of a string.
character(:) function, allocatable, public	concat (str1, str2)
	Smart concatenation that removes continuation markers (&) and handles line-continuation rules.
pure character(len_trim(str)) function, public	uppercase (str)
	Convert string to upper case (respects contents of quotes).
pure character(len_trim(str)) function, public	lowercase (str)
	Convert string to lower case (respects contents of quotes).
subroutine, public	writechk (unit, str)
	Write a long line split into chunks of size CHKSIZE with continuation (&).
character(1) function, public	previous (line, pos)
	Returns the previous non-blank character before position pos (updates pos).