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@@ -1,5 +1,5 @@
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/*
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-** $Id: lstate.h,v 2.114 2014/07/23 17:15:43 roberto Exp roberto $
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+** $Id: lstate.h,v 2.115 2014/08/01 17:33:08 roberto Exp roberto $
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** Global State
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** See Copyright Notice in lua.h
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*/
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@@ -54,7 +54,13 @@ typedef struct stringtable {
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/*
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-** information about a call
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+** Information about a call.
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+** When a thread yields, 'func' is adjusted to pretend that the
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+** top function has only the yielded values in its stack; in that
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+** case, the actual 'func' value is saved in field 'extra'.
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+** When a function calls another with a continuation, 'extra' keeps
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+** the function index so that, in case of errors, the continuation
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+** function can be called with the correct top.
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*/
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typedef struct CallInfo {
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StkId func; /* function index in the stack */
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Roberto Ierusalimschy