Targets · JavaScript · Reserved words
Reserved words
JavaScript keeps a set of words for its own syntax, so a program cannot use them as names. When a Program name collides with one, the renderer appends a single underscore — class becomes class_ — so the program keeps the name it chose and the output still runs. Because _ is illegal in a Program identifier, the escape can never collide with a name a program actually chose.
Contents
How a Program becomes JavaScript, in parts. Start with the introduction, then follow each part into the rendered output and the runtime it links against.
- Introduction — what the JavaScript target is, and how to read the rest of this section.
- Capabilities — which high-level features are possible, built in or through a library.
- Coding standards — the Frenzi coding standards the generated code follows, global and JavaScript-specific.
- Example — a full program using every keyword, and the JavaScript it renders to.
- Naming considerations — how Program's dotted names are carried into JavaScript.
- Entry point — the generated
main()that wires up the drivers and starts the reactive cycle. - Drivers — the native drivers that provide capabilities like the user interface and animation, draining each cycle's emissions.
- Runtime — the Reactive and Context machinery the rendered code links against.
- Native modules — the hand-written, per-platform JavaScript behind
NATIVEfunctions. - Keywords — how each of Program's keywords renders to JavaScript.
- Project setup — the files and commands to build and run the rendered program.
- Reserved words — the words JavaScript keeps for itself, and how a Program name that collides with one is escaped.
The full list
Every word JavaScript reserves, with the identifier a colliding Program name is escaped to. The
rule is uniform — append a single _:
| Reserved word | Rendered identifier |
|---|---|
await | await_ |
break | break_ |
case | case_ |
catch | catch_ |
class | class_ |
const | const_ |
continue | continue_ |
debugger | debugger_ |
default | default_ |
delete | delete_ |
do | do_ |
else | else_ |
enum | enum_ |
export | export_ |
extends | extends_ |
false | false_ |
finally | finally_ |
for | for_ |
function | function_ |
if | if_ |
import | import_ |
in | in_ |
instanceof | instanceof_ |
new | new_ |
null | null_ |
return | return_ |
super | super_ |
switch | switch_ |
this | this_ |
throw | throw_ |
true | true_ |
try | try_ |
typeof | typeof_ |
var | var_ |
void | void_ |
while | while_ |
with | with_ |
yield | yield_ |
let | let_ |
static | static_ |
implements | implements_ |
interface | interface_ |
package | package_ |
private | private_ |
protected | protected_ |
public | public_ |