Top-down parsing syntax error recovery.
Hallowell, Paul E. Jr.
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Compiler writers continue to search for a reliable method of syntactic error recovery. Spurious error reports and confusing diagnostics are common problems confronting the programmer. Innumerable error possibilities have made recovery design a frustrating task. This thesis implements a method of syntactic error recovery using recursive calls on the error recovery routine. Parsing is accomplished by traversing transition diagrams which are created from syntax charts. Key language symbols and dynamically generated recovery positions are used in restoring the parse. High-quality error diagnostics give a clear, accurate, and thorough description of each error, providing an excellent instructional software tool. Approach and implementation issues are discussed, and sample output listings are included.
Approved for public release; distribution in unlimited.
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