complete pest grammar and sample il file

src/main.rs

@@ -1,8 +1,21 @@
-use std::{env, fs, io::Read};
+use std::{env, fs};
+extern crate pest;
+#[macro_use]
+extern crate pest_derive;
+
+use pest::Parser;
+
+#[derive(Parser)]
+#[grammar = "skill.pest"]
+pub struct SkillParser;
 
 fn main() {
-    let args: Vec<String> = env::args().collect();
-    let mut file = fs::File::open(args[1].as_str()).expect("msg");
-    let mut data = String::new();
+    let mut args: Vec<String> = env::args().collect();
+    let data = fs::read_to_string(args[1].as_mut_str()).expect("could not read from file");
 
+
+    let parse = SkillParser::parse(Rule::skill, data.as_str()).expect("ha").next().unwrap();
+    for inner in parse.into_inner() {
+        println!("{:?}: {:?}", inner.as_rule(), inner);
+    }
 }

src/skill.pest

@@ -0,0 +1,28 @@
+WHITESPACE = _{ (" " | NEWLINE) }
+
+token_char = _{(NUMBER | LETTER | "_")}
+token      =  @{ LETTER ~ token_char* }
+
+string = @{"\"" ~ (!"\"" ~ ANY)* ~ "\""}
+number = @{NUMBER+ ~ ("." ~ NUMBER+)? ~ ("e" ~ "-"? ~ NUMBER+)?}
+bool = {"t" | "nil"}
+literal = _{string | number | bool}
+
+COMMENT = _{";" ~ (!NEWLINE ~ ANY)* ~ NEWLINE}
+
+lisp_list = _{ "(" ~ expr* ~ ")" }
+lazy_list = _{ "'(" ~ expr* ~ ")" }
+cstyle_list = @{ token ~ lisp_list}
+
+list = { (cstyle_list | lisp_list | lazy_list) }
+
+assign = {token ~ "=" ~ (inline_expr | list | token)}
+inline_operand = _{(list | token | literal)}
+inline_operator = {("-" | "+" | "/" | "*")}
+inline_expr = {inline_operand ~ (inline_operator ~ inline_operand)+}
+
+get_operator = {("->" | "~>")}
+get = {token ~ get_operator ~ (list | token)}
+
+expr = _{(get | assign | list | token | literal)}
+skill = { SOI ~ expr* ~ EOI }