source_location_information [Coccinelle]

Location metavariables are attached to a token with the '@' characted.
A position metavariable contain the following information relative to its token:

Field	Information
file	the name of the current source file
current_element	the name of the function currently proceed
line	the starting line number of the token
column	the starting character position of the token
line_end	the ending line number of the token
column_end	the ending character position of the token

All of these are represented as strings, even the line and column numbers.

The ending position is useful when a position p is attached to expression E by E@p.
In that case, the expression matched may span over several lines.

The following pattern:

 @ if_stmt1
 disable neg_if
 @
 expression E_1;
 statement S_1, S_e;
 position p_1;
 @@
 if@p_1 (E_1)
    S_1
 else
    S_e
 @
 script:python @ expr_1 << if_stmt1.E_1;
                 loc_1 << if_stmt1.p_1;
               @@
 print loc_1[0].file, " ", loc_1[0].line, " ", loc_1[0].column, " ", expr_1

will print the name of the file, line number and column number of every if-statement in the source (along with its controlling expression).