CodeQL library for C/C++
codeql/cpp-all 0.6.0 ( changelog , source )
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Member predicate ForStmt :: getAnIterationVariable

Gets a variable that is used as an iteration variable. That is, a variables that is defined, updated or tested in the head of this for statement.

This only has results that are quite certainly loop variables: for complex iterations, it may not return anything.

For example, for

for (i = 0; i < 10; i++) { j++; }

the result is i.

Variable getAnIterationVariable ( )