atomio 0.1.0

Crate to parse chemical formula
Documentation 
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count = {ASCII_DIGIT*}
root_count = {ASCII_DIGIT+}

element_name = {ASCII_ALPHA_UPPER ~ (ASCII_ALPHA_LOWER*)}
element = {  element_name ~ count }

group = { "(" ~ element ~ (expr)+ ~")" ~ count }

root_group = {root_count ~ element ~ (expr)*}

expr = _{
	element |
    group |
    root_group |
    "."
}

main = _{ SOI ~ expr* ~ EOI}