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520181ab91
parser, and clean up related code a bit. * tests/glr-regression.at (Leaked merged semantic value if user action cuts parse) Rename to... (Leaked semantic values if user action cuts parse) ... this. Add check for leaked parent RHS values. * data/glr.c (yydestroyGLRState): In debugging output, distinguish between an unresolved state (non-empty chain of semantic options) and an incomplete one (signaled by an empty chain). (yyresolveStates): Document the interface. Move all manipulation of an successfully or unsuccessfully resolved yyGLRState to... (yyresolveValue): ... here so that yyresolveValue always leaves a yyGLRState with consistent data and thus is easier to understand. Remove the yyvalp and yylocp parameters since they are always just taken from the yys parameter. When reporting a discarded merged value in debugging output, note that it is incompletely merged. Document the interface. (yyresolveAction): If resolving any of the RHS states fails, destroy them all rather than leaking them. Thus, as long as user actions are written to clean up the RHS correctly, yyresolveAction always cleans up the RHS of a semantic option. Document the interface.