ux-compiler 0.1.0

UX Framework Complier
Documentation 
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WHITESPACE = _{ " " | NEWLINE | "\t" }
COMMENT = _{ 
    "<!--" ~ (!"-->" ~ ANY)* ~ "-->"
}

file = { 
    SOI 
    ~ document
    ~ EOI 
}

document = {
    document_type? 
    ~ element*
}

element = { 
    closed_tag 
    | full_tag  
}

closed_tag = { "<" ~ ident ~ attributes? ~ "/>" }

full_tag = {
    open_tag ~ element_or_body* ~ close_tag
}

element_or_body = {
    element 
    | !"</" ~ element_body
}

open_tag = { "<" ~ ident ~ attributes? ~ ">" }
close_tag = { "</" ~ ident ~ ">" }

element_body = ${ element_inner } // compound atomic

element_inner = @{ element_inner_char* } // atomic rule

element_inner_char = {
    !"</" // if the following text is not closing tag
    ~ ANY // then consume one character
}


attributes = {
    attribute*
}

attribute = {
    attribute_name ~ "=" ~ attribute_value
    | attribute_name
}

attribute_name = @{ ASCII_ALPHA ~ (ASCII_ALPHANUMERIC | "-" | "_" | ":")* }

attribute_value = ${
    "\"" ~ double_quoted ~ "\""
    | "'" ~ single_quoted ~ "'"
}

document_type = {
    "<!" ~ ident ~ ident ~ ">"
}

// old fag

literal = {
    null_literal
    | boolean_literal
    | numeric_literal
    | string_literal
}

null_literal = {
    "null"
}

numeric_literal = {
    hex_number
    | number
}

number = {
    ASCII_DIGIT+ ~ ("." ~ ASCII_DIGIT+)? ~ exponent?
    | "." ~ ASCII_DIGIT+ ~ exponent?
}

exponent = {
    ("e"|"E") ~ ("+"|"-")? ~ ASCII_DIGIT+
}

hex_number = ${ ("0x"|"0X") ~ hex_inner }
hex_inner = @{ ASCII_HEX_DIGIT+ }

// 16.6 Booleans
boolean_literal = {
    "true" | "false"
}

// 16.7 Strings
string_literal = ${
    "\"" ~ double_quoted ~ "\""
    | "'" ~ single_quoted ~ "'"
}

double_quoted = @{ double_quoted_char* }

double_quoted_char = {
    "\\" ~ ("\"" | "\\" | "/" | "b" | "f" | "n" | "r" | "t")
    | "\\" ~ ("u" ~ ASCII_HEX_DIGIT{4})
    | !("\"") ~ ANY
}

single_quoted = @{ single_quoted_char* }

single_quoted_char = {
    !("'") ~ ANY
}

ident = @{ ASCII_ALPHA ~ (ASCII_ALPHANUMERIC | "_" )* }

qualified = {
    ident ~ ("." ~ ident)?
}

// testing = {
//      SOI 
//     ~ argument_list
//     ~ EOI   
// }