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e7ccb1f2ce
Add location test cases to test.cpp covering various C++ string literal forms: - r_plain: "a+b" — plain, offset 1 (already correct) - r_raw: R"(a+b)" — raw, offset 3 (R"( = 3); currently uses 1 (WRONG) - r_raw2: R"(\s+$)" — raw with metacharacters; currently wrong - r_raw3: R"(\(([,\w]+)+\)$)" — complex raw; currently wrong - r_raw4: R"x(a+b)x" — custom-delimiter raw, offset 4; currently uses 1 (WRONG) - r_wide: L"a+b" — L" prefix, offset 2; currently uses 1 (WRONG) - r_wide_raw: LR"(a+b)" — combined LR"( prefix, offset 4; currently uses 1 (WRONG) - r_esc1: "\\s+" — escape-containing plain; offset 1 (correct) - r_esc2: "a\\.b" — escaped dot; offset 1 (correct) Added std::wregex typedef to stubs (for L"..." and LR"(...)" wide-char literals). New locations.ql query reports per-term: litStartCol, valueStart, valueEnd, termStartCol, termEndCol — restricted to test_locations() function. Generated locations.expected via codeql test run --learn (CodeQL 2.26.1). All 3 tests pass. The expected output captures the CURRENT (pre-fix) columns: raw/prefixed rows show termStartCol = litStartCol + 1 (wrong); plain rows show litStartCol + 1 (correct). Commit 9 changes the raw/prefixed rows to their correct values.