lua syntax cheat sheet
chunk ::= {stat [`;´]} [laststat [`;´]]
block ::= chunk
stat ::= varlist `=´ explist |
functioncall |
do block end |
while exp do block end |
repeat block until exp |
if exp then block {elseif exp then block} [else block] end |
for Name `=´ exp `,´ exp [`,´ exp] do block end |
for namelist in explist do block end |
function funcname funcbody |
local function Name funcbody |
local namelist [`=´ explist]
laststat ::= return [explist] | break
funcname ::= Name {`.´ Name} [`:´ Name]
varlist ::= var {`,´ var}
var ::= Name | prefixexp `[´ exp `]´ | prefixexp `.´ Name
namelist ::= Name {`,´ Name}
explist ::= {exp `,´} exp
exp ::= nil | false | true | Number | String | `...´ | function |
prefixexp | tableconstructor | exp binop exp | unop exp
prefixexp ::= var | functioncall | `(´ exp `)´
functioncall ::= prefixexp args | prefixexp `:´ Name args
args ::= `(´ [explist] `)´ | tableconstructor | String
function ::= function funcbody
funcbody ::= `(´ [parlist] `)´ block end
parlist ::= namelist [`,´ `...´] | `...´
tableconstructor ::= `{´ [fieldlist] `}´
fieldlist ::= field {fieldsep field} [fieldsep]
field ::= `[´ exp `]´ `=´ exp | Name `=´ exp | exp
fieldsep ::= `,´ | `;´
binop ::= `+´ | `-´ | `*´ | `/´ | `^´ | `%´ | `..´ |
`<´ | `<=´ | `>´ | `>=´ | `==´ | `~=´ |
and | or
unop ::= `-´ | not | `#´