DXR is a code search and navigation tool aimed at making sense of large projects. It supports full-text and regex searches as well as structural queries.
ext:cpp
*
?
[...]
id:SomeClass
id:@foofunction
ref:someVar
ref:someType
regexp:(?i)\bs?printf
regexp:"(three|3) mice"
bases:SomeSubclass
callers:some_function
derived:SomeSuperclass
function:foo
member:SomeClass
module:module.name
+overridden:foo.bar.some_method
overrides:some_method
prop:foo
type:Stack