Changes between Initial Version and Version 1 of Literals

Timestamp:

11/13/09 13:46:56 (15 years ago)

Author:

hopscc

Comment:

--

Literals

@@ +1 @@
+= Literals =
+
+Cobra provides a convenient way to specify literals for initializing standard collections and [[BR]]
+explicitly setting the types (size and sign) for numeric literals.
+
+== List Literals ==
+List contents comma separated, collection  [] delimited.
+
+Empty list is []
+
+e.g 
+{{{
+names = [ 'mike', 'gary', 'pat', 'bruce', 'paul'] # List<of String>
+heads = [3,1,1,1,1] # List<of int>
+if name in [ 'fred', 'george', 'bill' ]
+
+myList=[]
+myList.add('1th')
+}}}
+
+== Map/Dictionary Literals ==
+Key and value colon separated, each entry comma separated, collection {} delimited.
+
+empty map is {:}.
+
+e.g.
+{{{
+nameId = { 'mike':10110, 'gary':21003, 'paul':32289 }  # Dictionary<of String, int>
+assert nameId['mike'] == 10110
+
+order = { 0:'mike', 1:'bruce', 2:'gary', 3:'pat' } # Dictionary<of int, String>
+
+mmap = {:}
+mmap['top'] = 99
+}}}
+
+== Set Literals ==
+Values comma separated, collection {} delimited.
+
+Empty set is {}.
+
+e.g.
+{{{
+names= {'gary', 'mike', 'bruce', 'paul'}
+assert names.intersection({'gary', 'paul'} == {'gary', 'paul'}
+assert not names.isSuperSetOf({'paula'})
+
+collisions={}
+collisions.add(toyota)
+
+}}}
+
+
+== Numeric Literals ==
+
+Non explicitly typed numeric Literals are typed to Decimal by default.[[BR]]
+This can be overidden by the compiler '''-number''' commandline switch or '''@number''' compiler  directive.
+
+Explicitly typed numeric literals can be specified by suffixing the numeric literal with a sign and size specification ( with an optional leading '_').
+
+
+Signs are
+    u - unsigned.
+    i - signed 
+
+Sizes are 
+    8  
+    16
+    32
+    64
+
+as in 
+
+{{{
+i = 123      # default (Decimal)
+
+ii = 123i    # integer (default size) 32 bits
+# same as 
+ii = 123 to int
+
+j = 123_i16  #  signed 16 bit
+k = 32u8     #  unsigned 8 bit == Byte
+
+l = 879289992978_i64 # signed 64 bit 
+}}}