Using Pattern Built-In Procedures and Keywords

DEC Text Processing Utility Data Types

3.7 Pattern Data Type

for the pattern, the built-in returns a range that contains the text that matches the pattern. You can assign the range to a variable.

The following example uses strings and pattern operators to create a pattern that is stored in the variable my_pat. The variable is then used with the SEARCH or SEARCH_QUIETLY built-in procedure in a forward direction. If SEARCH

or SEARCH_QUIETLY ﬁnds a match for my_pat, the range of matching text is stored in the variable match_range. The POSITION built-in procedure causes the editing point to move to the beginning of match_range.

my_pat := ("abc" "def") + "::";

match_range := SEARCH (my_pat, FORWARD); POSITION (match_range);

3.7.1 Using Pattern Built-In Procedures and Keywords

The following built-in procedures return values of the pattern data type:

•ANY

•ARB

•MATCH

•NOTANY

•SCAN

•SCANL

•SPAN

•SPANL

See the DEC Text Processing Utility Reference Manual for a complete description of these pattern built-in procedures.

3.7.2 Using Keywords to Build Patterns

You can use the following keywords as the ﬁrst argument to the SEARCH or SEARCH_QUIETLY built-in procedures. You can also use them to form patterns in expressions that use the pattern operators. See the DEC Text Processing Utility Reference Manual for a complete description of these keywords.

•ANCHOR

•BUFFER_BEGIN

•BUFFER_END

•LINE_BEGIN

•LINE_END

•PAGE_BREAK

•REMAIN

•UNANCHOR

3–12DEC Text Processing Utility Data Types

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