Nonterminal

Derivation

htmlbusiness

([ html | script[;] ] htmlbusiness)| eof

html

bytestream

script

loop)

declaration

declare externalfn {, externalfn } in module

externalfn

identifier

module

constant

function

funcname( argument {, argument})

argument

[identifier = ] expression

expression

simpleexpr [compop simpleexpr]

simpleexpr

term { addopr simpleexpr}

term

factor { mulopr factor}

factor

( ! | ++ | -- ) factor

( expression) |

assignment |

lvalue [ ++ | -- ] |

constant

function call

internalfn ( argument { , argument}) |

externalfn ( expression { , expression})

internalfn

write | writeEnc | wgateURL | archiveURL | imageURL | mimeURL | assert

mulopr

* / % &&

addopr

+ - & ||

compop

== | != | > | < | >= | <=

| value

field | register

field

{ ^ } identifier [ [ expression ] ] [ . attribute ]

attribute

dim |

disabled |

exists |

label |

maxSize |

name |

type |

value |

visSize

assignment

lvalue = expression

conditional

if ( expression ) htmlbusiness

{ ( elsif | elseif ) ( expression) htmlbusiness }

[ else htmlbusiness ]

loop

repeat expression times htmlbusiness end |

repeat with register in field htmlbusiness end |

repeat with register from expression to expression by expression htmlbusiness end |

for ( expression ; expression ; expression ) htmlbusiness end

register

identifier

identifier

{ ~ | _ | - } char { char | digit | _ | ~ | - } |

constant

# identifier

char

a … z | A … Z

Notation

Description

Usage

[…]

Square brackets

Optional derivations.

{…}

Braces

Contain zero or number of repetitions of an expression.

|

Vertical line

Alternative derivatives ( OR ).

(…)

Parentheses

Combine components where uniqueness is not guaranteed.