// now inject code to start alts
CodeGenerator gen = delegate.getGenerator();
STGroup codegenTemplates = gen.getTemplates();
// pick out alt(s) for primaries
CodeBlockForOuterMostAlt outerAlt = (CodeBlockForOuterMostAlt)function.code.get(0);
List<CodeBlockForAlt> primaryAltsCode = new ArrayList<CodeBlockForAlt>();
SrcOp primaryStuff = outerAlt.ops.get(0);
if ( primaryStuff instanceof Choice ) {
Choice primaryAltBlock = (Choice) primaryStuff;
primaryAltsCode.addAll(primaryAltBlock.alts);
}
else { // just a single alt I guess; no block
primaryAltsCode.add((CodeBlockForAlt)primaryStuff);
}
// pick out alt(s) for op alts
StarBlock opAltStarBlock = (StarBlock)outerAlt.ops.get(1);
CodeBlockForAlt altForOpAltBlock = opAltStarBlock.alts.get(0);
List<CodeBlockForAlt> opAltsCode = new ArrayList<CodeBlockForAlt>();
SrcOp opStuff = altForOpAltBlock.ops.get(0);
if ( opStuff instanceof AltBlock ) {
AltBlock opAltBlock = (AltBlock)opStuff;
opAltsCode.addAll(opAltBlock.alts);
}
else { // just a single alt I guess; no block
opAltsCode.add((CodeBlockForAlt)opStuff);
}
// Insert code in front of each primary alt to create specialized ctx if there was a label
for (int i = 0; i < primaryAltsCode.size(); i++) {
LeftRecursiveRuleAltInfo altInfo = r.recPrimaryAlts.get(i);
if ( altInfo.altLabel==null ) continue;
ST altActionST = codegenTemplates.getInstanceOf("recRuleReplaceContext");
altActionST.add("ctxName", Utils.capitalize(altInfo.altLabel));
Action altAction =
new Action(delegate, function.altLabelCtxs.get(altInfo.altLabel), altActionST);
CodeBlockForAlt alt = primaryAltsCode.get(i);
alt.insertOp(0, altAction);
}
// Insert code to set ctx.stop after primary block and before op * loop
ST setStopTokenAST = codegenTemplates.getInstanceOf("recRuleSetStopToken");
Action setStopTokenAction = new Action(delegate, function.ruleCtx, setStopTokenAST);
outerAlt.insertOp(1, setStopTokenAction);
// Insert code to set _prevctx at start of * loop
ST setPrevCtx = codegenTemplates.getInstanceOf("recRuleSetPrevCtx");
Action setPrevCtxAction = new Action(delegate, function.ruleCtx, setPrevCtx);
opAltStarBlock.addIterationOp(setPrevCtxAction);