pub fn gmatch_aux(state: &mut LuaState) -> Result<usize, LuaError>Expand description
Continuation function for string.gmatch iterator closure.
The 5.3+ gmatch iterator step (the default registered by gmatch).
Reads the iterator’s three closure upvalues: 1 and 2 are the traced source
and pattern strings; 3 is a userdata whose host payload ([GMatchIterState])
holds the mutable byte positions advanced across calls.
DEDUP is monomorphized — true for this 5.3+ entry, false for
gmatch_aux_legacy (5.1/5.2). Specializing on it (rather than reading a
runtime flag in this per-match-hot function) keeps the 5.3+ path’s codegen
byte-identical to the pre-P2c single-version matcher; the empty-match seam
costs nothing on the common path.