101 lines
2.8 KiB
Text
101 lines
2.8 KiB
Text
# Naming Conventions
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Word names in RETRO generally follow the following conventions.
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## General Guidelines
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* Readability is important
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* Be consistent
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* Don't use a prefix as the first character of a name
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* Don't use underscores in word names
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* Use short names for indices
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* Word names start with a `-` for "not"
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* Words returning a flag end in ?
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## Typical Format
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The word names will generally follow a form like:
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[namespace:]name
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The `namespace:` is optional, but recommended for consistency
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with the rest of the system and to make it easier to identify
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related words.
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## Case
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Word names are lowercase, with a dash (-) for compound names.
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```
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hello
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drop-pair
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s:for-each
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```
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Variables use TitleCase, with no dash between compound names.
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```
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Base
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Heap
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StringBuffers
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```
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Constants are UPPERCASE, with a dash (-) for compound names.
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```
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TRUE
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FALSE
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f:PI
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MAX-STRING-LENGTH
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```
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## Namespaces
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Words are grouped into broad namespaces by attaching a short
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prefix string to the start of a name.
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The common namespaces are:
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| Prefix | Contains |
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| ------- | ------------------------------------------------------ |
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| a: | Words operating on simple arrays |
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| ASCII: | ASCII character constants for control characters |
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| buffer: | Words for operating on a simple linear LIFO buffer |
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| c: | Words for operating on ASCII character data |
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| class: | Contains class handlers for words |
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| d: | Words operating on the Dictionary |
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| err: | Words for handling errors |
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| io: | General I/O words |
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| n: | Words operating on numeric data |
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| prefix: | Contains prefix handlers |
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| s: | Words operating on string data |
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| v: | Words operating on variables |
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| file: | File I/O words |
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| f: | Floating Point words |
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| gopher: | Gopher protocol words |
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| unix: | Unix system call words |
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## Tips
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Avoid using a prefix as the first character of a word name. RETRO
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will look for prefixes first, this will prevent direct use of
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the work in question.
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To find a list of prefix characters, do:
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```
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'prefix: d:words-with
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```
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Underscores in strings are replaced by spaces. This is problematic,
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especially with variables. Consider:
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'test_name var
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#188 !test_name
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In this, the string for the name is converted to "test name". The
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store in the second line will not add the space, so resolves to an
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incorrect address.
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I personally recommend avoiding the use of underscores in any word
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names.
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