The debugger applies certain scope and visibility rules to
find symbols.
The debugger first searches within the block that contains
the current location. If the symbol is found, the search is completed.
If the symbol is not found, the debugger searches outer, encompassing
blocks. A symbol in the outer, encompassing block is visible to
the inner block as long as no symbol of the same name exists in
the inner block. See Figure 7-1 “Sample Module Illustrating
Scope and Visibility ”
for an example.
If the search within the scope of the current environment
fails, the debugger applies additional rules to locate the name.
The following is a summary of the debugger's search order:
The block containing the current location.
Outer encompassing blocks (lexical parents).
The predefined language (`predefined)
block.
The user-declared block (`declared).
Global symbols and top-level procedures (external).
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 | NOTE: Special language-specific search rules can also be used.
For example, when debugging C++ programs, you can find class members. |
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In addition, you can explicitly reference symbols outside
the scope of the current environment by using qualified names. The
following section describes the syntax for using qualified names.
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