---

C Library Functions  - assert (3)

---

NAME

assert(3f) - [M_verify] print filename, linenumber, and message to stderr and stop program (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Examples
Author
License

SYNOPSIS

function assert(file,linenum,expr,g1,g2g3,g4,g5,g6,g7,g8,g9)

    character(len=*),intent(in)  :: file
    character(len=*),intent(in)  :: linenum
    logical,intent(in)           :: expr
    class(*),intent(in),optional :: g1,g2,g3,g4,g5,g6,g7,g8,g9

DESCRIPTION

assert(3f) prints strings to stderr and then stops program with exit code 1 It labels the first string as the filename, the next integer parameter as the linenumber, and then up to nine scalar values.

It is primarily intended for use by the prep(1) preprocessor $ASSERT directive

OPTIONS

filename
	a string assumed to be the current filename when compiling
linenum
	assumed to be the line number of the source code the ASSERT(3f) procedure was called at.
expr	logical value
g[1-9]	optional value(s) to print as a message before stopping. May be of type INTEGER, LOGICAL, REAL, DOUBLEPRECISION, COMPLEX, or CHARACTER.

EXAMPLES

Sample program:

   program demo_assert
   use M_verify, only : assert
   implicit none
   real :: a, toobig=1024
   a=2000
   call assert(’myroutine’, 101, a > toobig, ’The value is too large’, a, ’ > ’, toobig)
   end program demo_assert

AUTHOR

John S. Urban

LICENSE

Public Domain

---

Nemo Release 3.1

assert (3)

February 23, 2025

Generated by manServer 1.08 from 83d9219b-0f0e-490a-a224-0f5d68baa3f5 using man macros.