spicy (1) basic definition

unit

spicy parses data units through the unit type, which is similar to the well-known struct or record type.It defines a series of sequential fields, each of which has a name and a type, and stores the corresponding value at runtime.Units can be instantiated, assigned values ​​to various fields, and those field values ​​can be retrieved.

module Test;public type Foo = unit {# define a 32-bit integerversion: uint32 &default=56; # You can add the &default attribute to add a default value, otherwise the default value will not be set};# instantiate as fglobal f:Foo;# You can assign a value to override the default value of 56# f.version=60;print f; # Note that if the field inside is not assigned a value, the default value will not be read even if there is a default value.shows not setprint "version is %s" % f.version; # Note that when accessing the field, if there is no assignment, but there is a default value, the default value will be read

A unit is the starting point or entry for parsing data.If you want to make the unit outside the current module (that is, other files want to use the unit defined by the file), you need to declare it as public, and you can only write it for internal access.

By default, spicy is in network byte order.Can