dotparser 0.3.0

diagram file parser for Bevy visualization of diagrams
Documentation 
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// PlantUML Sequence Diagram Grammar

// Main rules
plantuml = { SOI ~ NEWLINE* ~ start_tag ~ diagram_content ~ end_tag ~ EOI }
start_tag = { "@startuml" ~ NEWLINE? }
end_tag = { "@enduml" ~ NEWLINE? }

diagram_content = { element* }

element = _{
    participant_declaration
    | message
    | activation
    | deactivation
    | note
    | divider
    | control_block
    | comment
    | NEWLINE
}

// Participants
participant_declaration = {
    participant_type ~ identifier ~ alias? ~ NEWLINE
}

participant_type = {
    "actor" | "participant" | "database" | "entity" | "control" | "boundary" | "collections" | "queue"
}

alias = { "as" ~ identifier }

// Messages
message = {
    identifier ~ arrow ~ identifier ~ message_label? ~ NEWLINE
}

arrow = {
    "->>" | "->" | "-->" | "-->>" |
    "<<-" | "<-" | "<--" | "<<--" |
    "<->" | "<-->" |
    "-\\" | "\\-" | "\\\\" | "//" | "/-" | "-/"
}

message_label = { ":" ~ message_text }
message_text = { (!NEWLINE ~ ANY)+ }

// Activation/Deactivation
activation = { "activate" ~ identifier ~ NEWLINE }
deactivation = { "deactivate" ~ identifier ~ NEWLINE }

// Notes
note = {
    note_position ~ ":" ~ note_text ~ NEWLINE
}

note_position = {
    "note" ~ ("left" | "right" | "over") ~ identifier ~ ("," ~ identifier)*
}

note_text = { (!NEWLINE ~ ANY)+ }

// Control blocks
control_block = {
    alt_block | loop_block | opt_block | par_block
}

alt_block = {
    "alt" ~ condition? ~ NEWLINE ~
    diagram_content ~
    else_clause* ~
    "end" ~ NEWLINE
}

else_clause = {
    "else" ~ condition? ~ NEWLINE ~
    diagram_content
}

loop_block = {
    "loop" ~ condition? ~ NEWLINE ~
    diagram_content ~
    "end" ~ NEWLINE
}

opt_block = {
    "opt" ~ condition? ~ NEWLINE ~
    diagram_content ~
    "end" ~ NEWLINE
}

par_block = {
    "par" ~ condition? ~ NEWLINE ~
    diagram_content ~
    ("else" ~ NEWLINE ~ diagram_content)* ~
    "end" ~ NEWLINE
}

condition = { (!NEWLINE ~ ANY)+ }

// Other elements
divider = { "==" ~ divider_text ~ "==" ~ NEWLINE }
divider_text = { (!("==" | NEWLINE) ~ ANY)+ }

comment = { ("'" | "/'") ~ (!NEWLINE ~ ANY)* ~ NEWLINE }

// Basic tokens
identifier = { quoted_string | simple_identifier }
simple_identifier = @{ ASCII_ALPHA ~ (ASCII_ALPHANUMERIC | "_")* }
quoted_string = { "\"" ~ inner_string ~ "\"" }
inner_string = @{ (!"\"" ~ ANY)* }

WHITESPACE = _{ " " | "\t" }