xalan-2.7.2/src/main/java/org/apache/xalan/xsltc/compiler/FunctionCall.java [399:425]:
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    public Type typeCheckStandard(SymbolTable stable) throws TypeCheckError {
	_fname.clearNamespace(); 	// HACK!!!

	final int n = _arguments.size();
	final Vector argsType = typeCheckArgs(stable);
	final MethodType args = new MethodType(Type.Void, argsType);
	final MethodType ptype =
	    lookupPrimop(stable, _fname.getLocalPart(), args);

	if (ptype != null) {
	    for (int i = 0; i < n; i++) {
		final Type argType = (Type) ptype.argsType().elementAt(i);
		final Expression exp = (Expression)_arguments.elementAt(i);
		if (!argType.identicalTo(exp.getType())) {
		    try {
			_arguments.setElementAt(new CastExpr(exp, argType), i);
		    }
		    catch (TypeCheckError e) {
			throw new TypeCheckError(this);	// invalid conversion
		    }
		}
	    }
	    _chosenMethodType = ptype;
	    return _type = ptype.resultType();
	}
	throw new TypeCheckError(this);
    }
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xalan-2.7.1/src/main/java/org/apache/xalan/xsltc/compiler/FunctionCall.java [404:430]:
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    public Type typeCheckStandard(SymbolTable stable) throws TypeCheckError {
	_fname.clearNamespace(); 	// HACK!!!

	final int n = _arguments.size();
	final Vector argsType = typeCheckArgs(stable);
	final MethodType args = new MethodType(Type.Void, argsType);
	final MethodType ptype =
	    lookupPrimop(stable, _fname.getLocalPart(), args);

	if (ptype != null) {
	    for (int i = 0; i < n; i++) {
		final Type argType = (Type) ptype.argsType().elementAt(i);
		final Expression exp = (Expression)_arguments.elementAt(i);
		if (!argType.identicalTo(exp.getType())) {
		    try {
			_arguments.setElementAt(new CastExpr(exp, argType), i);
		    }
		    catch (TypeCheckError e) {
			throw new TypeCheckError(this);	// invalid conversion
		    }
		}
	    }
	    _chosenMethodType = ptype;
	    return _type = ptype.resultType();
	}
	throw new TypeCheckError(this);
    }
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