本文整理汇总了Java中jdk.nashorn.internal.codegen.FunctionSignature类的典型用法代码示例。如果您正苦于以下问题：Java FunctionSignature类的具体用法？Java FunctionSignature怎么用？Java FunctionSignature使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。
FunctionSignature类属于jdk.nashorn.internal.codegen包，在下文中一共展示了FunctionSignature类的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Java代码示例。
示例1: addCode
import jdk.nashorn.internal.codegen.FunctionSignature; //导入依赖的package包/类
private MethodHandle addCode(final FunctionNode fn, final MethodType runtimeType, final MethodHandle guard, final MethodHandle fallback) {
final MethodType targetType = new FunctionSignature(fn).getMethodType();
MethodHandle target =
MH.findStatic(
LOOKUP,
fn.getCompileUnit().getCode(),
fn.getName(),
targetType);
/*
* For any integer argument. a double that is representable as an integer is OK.
* otherwise the guard would have failed. in that case introduce a filter that
* casts the double to an integer, which we know will preserve all precision.
*/
for (int i = 0; i < targetType.parameterCount(); i++) {
if (targetType.parameterType(i) == int.class) {
//representable as int
target = MH.filterArguments(target, i, ENSURE_INT);
}
}
MethodHandle mh = target;
if (guard != null) {
mh = MH.guardWithTest(MH.asCollector(guard, Object[].class, target.type().parameterCount()), MH.asType(target, fallback.type()), fallback);
}
final CompiledFunction cf = new CompiledFunction(runtimeType == null ? targetType : runtimeType, mh);
code.add(cf);
return cf.getInvoker();
}
示例2: lookup
import jdk.nashorn.internal.codegen.FunctionSignature; //导入依赖的package包/类
MethodHandle lookup(final FunctionNode fn) {
final MethodType type = new FunctionSignature(fn).getMethodType();
logLookup(true, type);
return lookupCodeMethod(fn.getCompileUnit().getCode(), type);
}