Fix find_if and find_if_not to support infinite ranges #715
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- Add compile-time detection for sentinel-based ranges - Fall back to sequential execution for infinite ranges - Maintain parallel execution for finite ranges - Fixes issue taskflow#534: taskflow::find_if doesn't work with infinite ranges The fix uses SFINAE to detect when E_t (end iterator type) differs from B_t (begin iterator type), indicating a sentinel-based range that cannot use std::distance.
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The fix uses SFINAE to detect when E_t (end iterator type) differs from B_t (begin iterator type), indicating a sentinel-based range that cannot use std::distance.