Initial commit

Signed-off-by: Tuan-Dat Tran <tuan-dat.tran@tudattr.dev>

pest/ledger.pest

@@ -0,0 +1,26 @@
+alpha            = _{ ASCII_ALPHA }
+digit            = _{ ASCII_DIGIT }
+alpha_num        = _{ ASCII_ALPHANUMERIC }
+any              = _{ ASCII }
+nl               = _{ NEWLINE }
+space            = _{ " " }
+indent           = _{ space{2} }
+word             = _{ alpha+ }
+
+year             =  { digit{2, 4} }
+month            =  { digit{1, 2} }
+day              =  { digit{1, 2} }
+date             =  { year ~ "/" ~ month ~ "/" ~ day }
+
+title            =  { word+ }
+transaction_head =  { date ~ space+ ~ title }
+
+account          =  { word ~ ":"? }
+currency         =  { "EUR" }
+eur              =  { digit+ }
+cents            =  { digit{2} }
+money            =  { "-"? ~ eur ~ "." ~ cents ~ " " ~ currency }
+transaction_line =  { indent ~ account* ~ indent+ ~ money }
+transaction      =  { transaction_head ~ nl ~ (transaction_line ~ nl)+ }
+
+comment          =  { ";" ~ any }