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Use property descriptors to describe bindings in environments. Separate arguments and variables. https://github.com/jimblandy/DebuggerDocs/commit/d72b346731108616ecb1453eb4c2dcffab8d0a00
<i>Actor</i> is the name of an actor representing this lexical environment. The requests it can answer are described below.
<i>ParentEnvironment</i> describes is a lexical environment describing the next enclosing lexical environment; the <tt>parent</tt> property is omitted on the outermost environment.
{ "type":"function", "actor":<i>actor</i>, "function":<i>function</i>, "functionName":<i>functionName</i>,
{ "type":"with", "actor":<i>actor</i>, "object":<i>object</i>, "parent":<i>parentEnvironment</i> }
This represents bindings an environment introduced by a <tt>with</tt> statement whose operand is <i>object</i> (a grip). The other properties are as described above.
{ "type":"block", "actor":<i>actor</i>, "bindings":<i>bindings</i>, "parent":<i>parentEnvironment</i> }
This represents bindings an environment introduced by a <tt>let</tt> block, <tt>for-in</tt> statement, <tt>catch</tt> block, or the like. The properties are as described above.
A <i>bindings</i> value has the form:
{ "mutablearguments":[ { <i>name</i>:<i>valuedescriptor</i>}, ... }], "immutablevariables":{ <i>name</i>:<i>valuedescriptor</i>, ... } }
The <itt>TODO: Should we segregate function "arguments "</tt> list appears only in bindings values, for <tt>"function"</tt> environments. It lists the arguments in case clients want to display them separately? They should the order they appear in order.the function's definition.(The same name may appear several times in the list, as permitted by JavaScript; the name's last appearance is the one in scope in the function.</i>)
Note that language implementations may omit some environment records from a function's scope if it can determine that the function would not use them. This means that it may be impossible for a debugger to find all the variables that ought to be in scope.
function f(x) {
function g(y) {
var z = "value of z";
alert(x + y);
}
"function":{ "type":"object", "class":"Function", "actor":<i>gActor</i> },
"functionName":"g",
"bindings":{ arguments: [ { "mutabley":{ "yvalue":"argument to g" , "configurable":"false", "writable":true, "enumerable":true } } ] },
"parent":{ "type":"function", "actor":<i>fFrameActor</i>,
"function":{ "type":"object", "class":"Function", "actor":<i>fActor</i> },
"functionName":"f",
"bindings":{ arguments: [ { "mutablex":{ "xvalue":"argument to f" , "configurable":"false", "writable":true, "enumerable":true } } ], variables: { "z": { "value":"value of z", "configurable":"false", "writable":true, "enumerable":true } } },
"parent":{ "type":"object", "actor":<i>globalCodeActor</i>,
"object":{ "type":"object", "class":"Global",
