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Chapter 11: Predefined Macros
isalive
isalive
Function
Check the status of a specified symbol
Synopsis
int isalive (symbol_name)
void symbol_name;
Description
The isalive macro can tell you whether a symbol is defined, and additionally if
it currently active or available on the stack.
Diagnostics
Returns one of the following four values, depending on the status of the
symbol:
Value
-1
0
1
2
Example
Symbol Add foo <tab> Address 0x1000
Expression Printf "%i", isalive(foo)
because symbol is defined and active
458
Meaning
Symbol does not exist
Symbol not currently active (cannot be referenced)
Symbol currently active (part of the local procedure)
Symbol available on the stack (not part of the local procedure)
1
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