Initial commit

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

.gitignore

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Cargo.toml

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+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+pest = "2.7.10"
+pest_derive = "2.7.10"

ledger.pest

@@ -0,0 +1,23 @@
+alpha            = { ASCII_ALPHA }
+digit            = { ASCII_DIGIT }
+alpha_num        = { ASCII_ALPHANUMERIC }
+any              = { ASCII }
+nl               = { NEWLINE }
+space            = { " " }
+indent           = { space{2} }
+year             = { digit{2, 4} ~ "/" }
+month            = { digit{1, 2} ~ "/" }
+day              = { digit{1, 2} }
+date             = { year ~ month ~ day }
+word             = { alpha+ }
+title            = { word+ }
+transaction_head = { date ~ space+ ~ title }
+currency         = { "EUR" }
+money            = { "-"? ~ eur ~ "." ~ cents ~ " " ~ currency }
+eur              = { digit+ }
+cents            = { digit{2} }
+account          = { word ~ ":" }
+term_account     = { word }
+transaction_line = { indent ~ account* ~ term_account ~ indent+ ~ money }
+transaction      = { transaction_head ~ nl ~ (transaction_line ~ nl)+ }
+comment          = { ";" ~ any }

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 }

src/main.rs

@@ -0,0 +1,9 @@
+use pest_derive::Parser;
+
+#[derive(Parser)]
+#[grammar = "../pest/ledger.pest"] // relative to src
+struct LedgerParser;
+
+fn main() {
+    println!("Hello, world!");
+}