Changes between Version 2 and Version 3 of HemlockProgrammer/TheCurrentEnvironment

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01/14/08 18:15:06 (5 years ago)
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gz
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  • HemlockProgrammer/TheCurrentEnvironment

    v2 v3  
     1[HemlockProgrammer Back to Table of Contents] 
    12[[PageOutline]] 
    23 
    34= 5. The Current Environment = 
    45 
    5 == 5.1. Different Scopes == 
     6== 5.1. Different Scopes ==#DifferentScopes 
    67 
    7 In Hemlock the values of variables (page 23), key-bindings (page 29) 
    8 and character-attributes (page 37) may depend on the current-buffer 
    9 (page 9) and the modes active in it.  There are three possible scopes 
    10 for Hemlock values: 
     8In Hemlock the "current" values of [HemlockProgrammer/HemlockVariables variables], 
     9[HemlockProgrammer/Commands key bindings] and 
     10[HemlockProgrammer/CharacterAttributes character-attributes] 
     11depend on the [HemlockProgrammer/Buffers#CurrentBuffer current buffer] 
     12and the modes active in it.  There are three possible scopes for 
     13Hemlock values: 
    1114 
    1215 buffer local:: 
    13   The value is present only if the buffer it is local to is the current-buffer. 
     16  The value is present only if the buffer it is local to is the current buffer. 
    1417 
    1518 mode local:: 
    16   The value is present only when the mode it is local to is 
    17   active in the current-buffer. 
     19  The value is present only when the mode it is local to is active in the current buffer. 
    1820 
    1921 global:: 
    2022  The value is always present unless shadowed by a buffer or mode local value. 
    2123 
    22 == 5.2. Shadowing == 
     24== 5.2. Shadowing ==#Shadowing 
    2325 
    24 It is possible for there to be a conflict between different values for 
    25 the same thing in different scopes.  For example, there be might a 
    26 global binding for a given variable and also a local binding in the 
    27 current buffer.  Whenever there is a conflict shadowing occurs, 
    28 permitting only one of the values to be visible in the current 
    29 environment. 
     26It is possible that there are different values for the same thing in  
     27in different scopes.  For example, there be might a global binding for a given 
     28variable and also a local binding in the current buffer.  Whenever there is a 
     29conflict, shadowing occurs, permitting only one of the values to be visible in 
     30the current environment. 
    3031 
    3132The process of resolving such a conflict can be described as a search 
    … …  
    3839 4. Global values. 
    3940 
     41[HemlockProgrammer Back to Table of Contents]