Reserved Keywords

Module & Package

Keyword	Description
coco	Module definition
package	Package qualifier
imports	Import packages
pub	Public visibility in packages
const	Constant definition

State & Storage

Keyword	Description
state	State definition (state logic, state actor)
logic	Logic state keyword
actor	Actor state keyword
Logic	Access logic state (Module.Logic.field)
Actor	Access actor state (Module.Actor(id).field)
Sender	Current sender identifier
memory	Temporary variable
storage	Storage pointer variable
observe	Read from state
mutate	Write to state
payer	Who pays for logic-state storage (mutate ... payer Logic)
gather	Load complex object from storage (not maps)
disperse	Store complex object to storage (a map merges)

Endpoints & Functions

Keyword	Description
endpoint	Endpoint definition
function	Local function definition
deploy	Logic initialization endpoint
enlist	Reserved. No longer compiles as an endpoint qualifier (since v0.9.2)
dynamic	Endpoint mutates state
static	Endpoint reads state (no mutation)
pure	Endpoint has no state access

Classes & Types

Keyword	Description
class	Class definition
field	Class field
method	Class method
self	Reference to class instance
make	Create new complex value

Control Flow

Keyword	Description
if / else	Conditional
switch / case / default	Multi-branch conditional
for / in	Iteration
break	Exit loop
continue	Skip to next iteration
return	Set output and exit
yield	Set output (continue execution)
pass	No operation
throw	Throw exception

Events

Keyword	Description
event	Event definition
topic	Event topic field
emit	Emit event

Interfaces & Assets

Keyword	Description
interface	Interface definition
asset	Asset logic / asset interface section

Built-in Objects

Keyword	Description
Environment	Runtime environment methods
Invocation	Current invocation methods
Builtins	Built-in functions
Actor(id)	Actor query methods (Exists, HasSigned, Param)

Standard Functions

Keyword	Description
len	Length of collection, string, bytes, or class
typeof	Type name as String
append	Add to varray
popend	Remove and return last varray element
merge	Combine arrays or maps
remove	Remove key from map
make	Create empty/default collection or class
join	Concatenate strings or merge classes (via __join__)
range	Generate integer sequence
sweep	Remove empty collection from storage
generate	Auto-create missing map keys
polorize	Serialize value to POLO bytes
depolorize	Deserialize POLO-encoded bytes

Literals

Keyword	Description
true	Boolean true
false	Boolean false

Additional Keywords

Keyword	Description
try / catch / finally	Exception handling
revert	Throw with revert flag
build	Reserved