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|
Directives: Import, Inheritance, Declaration and Assignment
===========================================================
#import and #from
-----------------
The template:
::
#import math
This construct does not produce any output.
The generated module, at the bottom of the import section:
::
import math
#extends
--------
The template:
::
#extends SomeClass
The generated import (skipped if {SomeClass} has already been
imported):
::
from SomeClass import SomeClass
The generated class:
::
class x(SomeClass):
#implements
-----------
The template:
::
#implements doOutput
In the generated class, the main method is {.doOutput} instead of
{.respond}, and the attribute naming this method is:
::
_mainCheetahMethod_for_x2= 'doOutput'
#set and #set global
--------------------
The template:
::
#set $namesList = ['Moe','Larry','Curly']
$namesList
#set global $toes = ['eeny', 'meeny', 'miney', 'moe']
$toes
The output:
::
['Moe', 'Larry', 'Curly']
['eeny', 'meeny', 'miney', 'moe']
The generated code:
::
1 namesList = ['Moe','Larry','Curly']
2 write(filter(namesList)) # generated from '$namesList' at line 2, col 1.
3 write('\n')
4 globalSetVars["toes"] = ['eeny', 'meeny', 'miney', 'moe']
5 write(filter(VFS(SL,"toes",1))) # generated from '$toes' at line 4, col 1.
6 write('\n')
{globalSetVars} is a local variable referencing {.\_globalSetVars}.
Writes go into it directly, but reads take advantage of the fact
that {.\_globalSetVars} is on the searchList. (In fact, it's the
very first namespace.)
#del
----
The template:
::
#set $a = 1
#del $a
#set $a = 2
#set $arr = [0, 1, 2]
#del $a, $arr[1]
In the generated class:
::
1 a = 1
2 del a
3 a = 2
4 arr = [0, 1, 2]
5 del a, arr[1]
#attr
-----
The template:
::
#attr $namesList = ['Moe', 'Larry', 'Curly']
In the generated class:
::
## GENERATED ATTRIBUTES
namesList = ['Moe', 'Larry', 'Curly']
#def
----
The template:
::
#def printArg($arg)
The argument is $arg.
#end def
My method returned $printArg(5).
The output:
::
My method returned The argument is 5.
.
Hmm, not exactly what we expected. The method returns a trailing
newline because we didn't end the last line with {#slurp}. So the
second period (outside the method) appears on a separate line.
The {#def} generates a method {.printArg} whose structure is
similar to the main method:
::
def printArg(self,
arg,
trans=None,
dummyTrans=False,
VFS=valueFromSearchList,
VFN=valueForName,
getmtime=getmtime,
currentTime=time.time):
"""
Generated from #def printArg($arg) at line 1, col 1.
"""
if not trans:
trans = DummyTransaction()
dummyTrans = True
write = trans.response().write
SL = self._searchList
filter = self._currentFilter
globalSetVars = self._globalSetVars
########################################
## START - generated method body
write('The argument is ')
write(filter(arg)) # generated from '$arg' at line 2, col 17.
write('.\n')
########################################
## END - generated method body
if dummyTrans:
return trans.response().getvalue()
else:
return ""
When {.printArg} is called from a placeholder, only the arguments
the user supplied are passed. The other arguments retain their
default values.
#block
------
The template:
::
#block content
This page is under construction.
#end block
The output:
::
This page is under construction.
This construct generates a method {.content} in the same structure
as {.printArg} above, containing the write code:
::
write('This page is under construction.\n')
In the main method, the write code is:
::
self.content(trans=trans) # generated from ('content', '#block content')
# at line 1, col 1.
So a block placeholder implicitly passes the current transaction to
the method.
|
