LIST IF

Introduction

A command which causes lines of the current program which contain the specified string to be listed to the console.

LIST IF *FX
LIST IF Please press <ENTER> to continue

You can specify the range of line numbers to be listed in a similar manner to LIST. For example, 

LIST 100,2500 IF DEF

Will list all the lines between 100 and 2500 which contain the keyword DEF.

Keywords are tokenised before the search begins. Consequently, you can use LIST IF to find lines with particular commands in them.

LIST IF PROC
LIST IF DEF

LIST IF is very useful for locating the lines in a program which define or use functions or procedures.

Limitations

Because keywords are tokenised wherever they occur in the command line, you cannot use LIST IF to search for a string (including a star command) which contains a keyword. For example, the following will not work:

LIST IF *LOAD
LIST IF DO YOU WANT TO PRINT THE RESULTS?

You cannot search for the 'left' form of those pseudo-variables which have two forms (PTR#=, PAGE=, TIME=, TIME=, LOMEM=, HIMEM=) because the 'right' form is assumed when the name is tokenised. Consequently,

LIST IF TIME

will find line 20 but not line 10 in the following program segment 

10 TIME=20
20 now=TIME

You cannot search for 'keywords' which are not tokenised in the context of the program. For example,

LIST IF LOAD

will not list lines containing 

ZLOAD=1
PROCLOAD
FNLOAD
"LOAD"
REM LOAD

because LOAD is not tokenised in any of these lines.

The internal format of line numbers (GOTO 1000, for example) may spuriously match a search string of three characters or less.

Syntax

Associated Keywords