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Add info about the label assignment operator

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git-svn-id: svn://svn.cc65.org/cc65/trunk@2550 b7a2c559-68d2-44c3-8de9-860c34a00d81
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cuz
2003-10-20 09:00:07 +00:00
parent 56f350166c
commit 2acf1cc717
1 changed files with 12 additions and 3 deletions
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13
doc/ca65.sgml
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@@ -506,14 +506,23 @@ use symbols and labels, giving a lot of flexibility.
<sect1>Numeric constants<p> <sect1>Numeric constants<p>
Numeric constants are defined using the equal sign. After doing Numeric constants are defined using the equal sign or the label assignment
operator. After doing
<tscreen><verb> <tscreen><verb>
two = 2 two = 2
</verb></tscreen> </verb></tscreen>
may use the symbol "two" in every place where a number is expected, and it is may use the symbol "two" in every place where a number is expected, and it is
evaluated to the value 2 in this context. An example would be evaluated to the value 2 in this context. The label assignment operator causes
the same, but causes the symbol to be marked as a label, which may cause a
different handling in the debugger:
<tscreen><verb>
io := $d000
</verb></tscreen>
The right side can of course be an expression:
<tscreen><verb> <tscreen><verb>
four = two * two four = two * two