in escodegen.js [1492:1537]
TryStatement: function (stmt, flags) {
var result, i, iz, guardedHandlers;
result = ['try', this.maybeBlock(stmt.block, S_TFFF)];
result = this.maybeBlockSuffix(stmt.block, result);
if (stmt.handlers) {
// old interface
for (i = 0, iz = stmt.handlers.length; i < iz; ++i) {
result = join(result, this.generateStatement(stmt.handlers[i], S_TFFF));
if (stmt.finalizer || i + 1 !== iz) {
result = this.maybeBlockSuffix(stmt.handlers[i].body, result);
}
}
} else {
guardedHandlers = stmt.guardedHandlers || [];
for (i = 0, iz = guardedHandlers.length; i < iz; ++i) {
result = join(result, this.generateStatement(guardedHandlers[i], S_TFFF));
if (stmt.finalizer || i + 1 !== iz) {
result = this.maybeBlockSuffix(guardedHandlers[i].body, result);
}
}
// new interface
if (stmt.handler) {
if (Array.isArray(stmt.handler)) {
for (i = 0, iz = stmt.handler.length; i < iz; ++i) {
result = join(result, this.generateStatement(stmt.handler[i], S_TFFF));
if (stmt.finalizer || i + 1 !== iz) {
result = this.maybeBlockSuffix(stmt.handler[i].body, result);
}
}
} else {
result = join(result, this.generateStatement(stmt.handler, S_TFFF));
if (stmt.finalizer) {
result = this.maybeBlockSuffix(stmt.handler.body, result);
}
}
}
}
if (stmt.finalizer) {
result = join(result, ['finally', this.maybeBlock(stmt.finalizer, S_TFFF)]);
}
return result;
},