18

11 files changed, 978 insertions, 0 deletions

diff --git a/18/Cargo.toml b/18/Cargo.toml
new file mode 100644
index 0000000..556dff0
--- /dev/null
+++ b/18/Cargo.toml
@@ -0,0 +1,16 @@
+[package]
+name = "advent_18"
+version = "0.1.0"
+authors = ["Irene Knapp <ireneista@gmail.com>"]
+edition = "2018"
+
+[dependencies]
+advent_lib = { path = "../lib" }
+lalrpop-util = "0.19"
+
+[dev-dependencies]
+assert_cmd = "0.10"
+lalrpop = { version = "0.19", features = [ "lexer" ] }
+
+[build-dependencies]
+lalrpop = { version = "0.19", features = [ "lexer" ] }
diff --git a/18/build.rs b/18/build.rs
new file mode 100644
index 0000000..23c7d3f
--- /dev/null
+++ b/18/build.rs
@@ -0,0 +1,5 @@
+extern crate lalrpop;
+
+fn main() {
+    lalrpop::process_root().unwrap();
+}
diff --git a/18/input b/18/input
new file mode 100644
index 0000000..401bc01
--- /dev/null
+++ b/18/input
@@ -0,0 +1,375 @@
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+((4 * 7) + 9 + 7 + 8 + 3) + 6 * 5
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+(7 * (9 + 8 * 4 * 7 + 3) + 8 * 3 * 3 * (6 * 8 * 8 * 3 + 9)) + 8 * 5 + 6 * 6
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+4 * (5 + (2 + 8 + 8 * 7 * 3 * 9) * 4 + 4 * 4) + 3
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+3 * (4 + 9)
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+8 + (9 + 8) + 5 * 2 + 9 * ((4 * 8 + 5) * 3 * (8 + 3 + 6 + 5 + 7 * 4) * 5)
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+4 * 8 + 9 * (7 * 9 + 9 + 8) + 8
+9 + ((6 + 6 + 2 * 2 * 9 * 9) * 8 * 9 * 4 * 6)
+((2 + 8 + 9 * 4 + 7) * 7 * 5 + 3 + 9) * 4 * 3 + 7
+(8 * 8 + (5 + 3 + 9 * 9)) + ((7 + 5 + 5) + 2 + 7) * (9 + 4 + 4) + 8 + 4 * 8
+(9 * 6 * 3) * 3 * (6 * 2 + (3 + 4 + 2) * (7 + 9 * 5 + 5)) + 8 + 6
+(8 + (3 + 8 * 3) * 3 * 6 + 5) + 5 + 7
+((9 + 8) + (6 + 2) * 7) * 2 + 6 * 4 * 2
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+(6 + 4 + (2 + 3 * 4 + 3) + 4 + (3 * 2 + 5) * 8) + 9
+(3 + 3 + (9 * 4) * 2) + 5 * 7 * 3 * (8 + 4) + 6
+(3 + 7) + 7 * (4 + 7 * (9 + 2 * 7) + 8 * 5 * 8) * 3
+((2 * 4 * 5 * 4) + 3 + 3 * 7 + (8 * 2 + 6)) + 8
+(5 + 6 + 9 + 8 + 8 + 3) * 2 + 6
+4 + 6 + 8 + (9 * 8 * 2 + 6 * 4 + 3) * 5
+(2 * 2 * 5 * 7 + 4) * 6 + 7 + 5 * (9 + 7)
+5 * 9 + (7 * 4 + (9 * 7) * 5 * 7) + 5
+(3 * 6 + 8) + 7 + 8 + 3 + 4
+4 + 3 * 3 * 3 + 7 * (5 + 9 + 6 + 5 + 6)
+3 + 9 + 8 * 4 + (6 * 7 * 3 + 7 * 5)
+8 * 3 * (9 * (4 * 8 * 7 * 9 + 3 * 9) * 2 + 5 * 7) * 4 * 4
+5 * 7 * (4 * (9 * 7 * 7 + 5) * (7 + 5 * 9 * 6 + 8) + 4 * 6 * (4 + 6 + 6)) + 3
+4 + ((4 + 2) + 7 * (3 * 4 + 4 * 9 + 6 + 8)) + 7 * 4 + 5 * 7
+((6 + 2 * 6) * 2) + (5 * 9 + 9 + 7) + 7 * 4 * 2
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+6 + (9 + 6 * 4 + 6 * 6 + 3) * 5 * 2
+8 * 3 * 7 * (6 + 3 + (7 * 6 * 5 + 9 + 4) + 6 * (2 * 7 + 5 + 6) + 3) * (6 * 4 + 2 * 9 * 7 + 6)
+2 * (5 * (9 + 6)) * (4 + (5 * 2 + 3) + 7 * 6 * (8 * 4 * 4) * 4) * 5
+2 * 2 * (3 + 8 + (4 * 3) + (6 + 5 + 6 + 8 * 5 * 4) + 8) + 3 * 3 + 8
+4 * (8 * 4 * (3 * 6) + (5 + 3 + 4 * 6 + 4 + 7) * 4) + ((8 * 2) * (2 * 7) + (9 + 7 * 2 + 2))
+3 * 4 + (7 * 8) + (5 + 7 * 8 + 9) * 9
+(9 * 4) * 5 * 3 * 9 + 5 + 7
+(7 * (9 * 4 + 9 + 5) * (2 + 3 * 3 + 8 + 2)) * 5
+((9 * 2 * 9 + 8 + 8 * 3) * 5 * 7 + (2 * 2 * 3 * 2) + 6) + (7 + 8 * (4 + 2 * 9 * 6 + 3 * 9) * 4 * 2) + ((4 + 9 * 9 * 5 * 5) + 2 + 8 * 9 * 2) + 9 * 6
+9 + 7 + 9 * (9 + 4 * 5) * 7
+7 + 8 + ((2 + 3) * 4) * 6
+6 * 4
+(9 + 4 * (6 * 2 + 2 + 7 * 6) * 4) * ((6 + 8 + 7 + 4 + 9) + (7 + 9 + 8 + 6)) + (2 * (3 + 8) + 7 * (4 + 3) * 5)
+(9 + (2 + 4 * 3 + 3 + 2 + 2) + 4 + (2 + 3) + 3) * ((6 + 6 + 7 * 6) * 2 + 3 + 9 * 4 + 8) * 2 * 2 + (9 + (5 * 6 * 8 * 3))
+(8 * (4 + 9 * 3 + 6 + 6) * 7 * 6) * 5 + 4 + 8 * 8
+3 * (8 * (4 * 2 + 6 * 6) * 5 + (9 * 6 * 3 + 4 * 4) + (5 * 2 + 7 + 5 + 5))
+3 * ((6 + 7 + 7 * 9 + 4) * 6 + 8) + 8 + ((7 * 9 + 5) + 5 + 6) * (5 * 6 + 2 * 6 * 6 + 7)
+(3 + (8 + 9) * 5 * 6 + 8) * (2 + 6 + (7 + 4 + 6) * 4 + 3) + 6 + 2 * (7 + 8 * 5 + 7)
+5 * (2 + 2 * 6 * (6 + 2 * 4 + 8) + 4 * 5)
+4 * 9 * 7 + 7 * 3
+((7 + 7 * 6) * (5 * 9 * 6)) * 5 + 5 + 3 + 8 + 4
+(4 + (5 + 7 + 7 + 7)) * 4 * (7 * 7 + 3) * 6 * 3 * ((4 * 7) + 4 * 9)
+2 * 2 + 6 * ((8 * 9 + 7 * 7) * (5 * 9 * 6 * 6 * 7 + 6) + 5 * 4) + (8 * 7 + 5 * 5)
+9 + 6 * ((9 + 5 + 2 + 7 + 3) * 3 * 6) + 9 + 7 * 9
+4 * (8 * (4 + 6 * 4 + 8 + 2 + 3) * 5 + 8 * 5) * ((5 + 4 + 2 + 3 * 2 + 9) * (4 * 8 + 9 + 4 * 4 + 4)) + 2
+9 + (3 * 3 + 4 + 5 + 6) + 3 + (5 + 7) + (3 + 5)
+((3 * 3) + 9 + 4 + 8 + 9 + 2) * (7 * (8 + 8 * 7) * 4 + (4 * 4 + 2 * 5 * 2) * 9)
+2 + (7 + (6 * 2 * 4 + 2 * 9 * 2) * 4 * 5) + (4 + 5)
+2 + (4 + 3 * 5 * 3 + 3) + 5
+6 * 6 + 4 + 8 + 4
+((3 + 4 + 2 + 6) + 8) + 2
+(4 + 2 * 4 + 6 + 8 * 3) + (3 * 8 + 9 + 7 * 5 + 2) + 7 * 6 * (6 * 3 * 5 * 6) * 6
+5 * 6 + (8 * (6 + 6 * 4 + 2) * (2 + 5 + 4 * 7 + 3 * 6) + 8 + 4) * 6 * 6
+3 * 6 * 5 * (3 + 4 + 3) * 3 * 5
+9 * (4 * (3 * 9 * 4 * 9 + 6 * 7) * 7 + 7 * 7)
+7 * 4 + 2 + (7 + (3 * 4) * 9 * 8) * 2
+(3 * (9 * 3 + 4) * 3) + 2 + ((3 + 7 + 6 + 4 * 6 + 9) + (3 * 7)) * 8
+(4 + 3 + 6 * 7) * (7 * 7 * (8 * 4 + 2 * 8 * 2 + 3) + 4 + 8 * 3) * 8 + 2
+3 + (9 + 2 * 3)
+7 * 7 * 5 + (2 * (3 + 8 + 2) + 7)
+4 * (7 + 7 * 9) * ((8 + 2 * 4 * 6 + 4 + 9) * 5 * 6 + 3 + 3) + (4 + 4 * 2 * (4 + 4 + 3 + 3 + 7) + 2)
+2 * 2 + 2 * 9 + 9
+9 * 4 + (2 * 5) + 8 * 5
+(8 + 9 * (2 * 2 + 3 * 9 * 3 + 3) * 8 * 8) * (9 * 4 * 6 * 7)
+7 * (6 * 8 * 8 * (3 * 2 + 4 * 7 + 9 + 6) + (4 + 9 * 3 * 3 + 7 + 3)) + (4 * 3) * 5 * 8 * 4
+4 * 8
+7 * 2 * (4 + 2 * 7) + ((3 * 2 + 2 * 9 * 6 + 7) + 8 * 6 * 6 + 9) * 7 + 5
+(4 * (2 + 4 * 4 + 4) * (8 + 7)) * 7 * 8 * 9 * 9
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+(4 * 4 * 9 * 8 + (7 * 2 + 9 * 6 + 4)) + 5
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+2 * (2 * 6 + 8 + (7 + 6 + 2) + 3 * 6) * (5 + 8 + 7 + (9 + 9 * 3 * 7)) * 7 + 4
+(5 + 5 + 8 * (5 + 2 + 3)) * 9 * 9 + ((2 * 6 * 6 * 9) * 5 + 4 * 6) + 5
+5 + 3 * 4 * (3 + 4 + 8) * (3 * 9 + 9 + 7 * 8)
+6 * 4 + ((7 + 3 * 3 + 3) + (3 * 7) * 3 + 9 * 2)
+(5 * 3 * 7 * 2 + 6) * (2 * 6) + 6
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+((2 + 3 + 2 * 8 * 4 * 6) * 4 * 2 * 8 * 5 + 5) + 8 * 9
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+2 + (9 * 4) * 7
+4 + 7
+(9 * (2 * 2 + 4) + 3 * 3 + (7 * 4 * 6 * 4 + 5 + 4) * (8 * 8 * 7 + 8)) * 6 + 3 + 7 + (6 * 5 * 8 * 6) + 2
+2 + 6 + (4 + 2 * 7 + 3 * 9 * 9) * ((8 + 2 * 4 * 4 * 2 + 3) + (3 + 9 + 4) * 3 * 4) + 8
+8 + (6 * 5 + 2 * 6 * (2 * 3 + 2 * 9 * 7 * 2) + 6) * 2 * 8 + 7 + (6 * 5 * 9 * 6)
+6 + (3 + 9 + 3 * 6)
+(2 + 5 * 9 * 2) * 2 * 5 + ((4 * 2 * 7 + 8 + 7) + 7 + 6 * 4 * 3 * 6)
+(7 + 3 * 6 * (2 * 7) + 7 * 8) * 7 * 2 + 4 + 5 * 2
+(6 * 2 * 5) + (7 + 7) * 9 * 5 * 2 * 5
+3 * (8 + 3 * 3 * 2) + 5 + (9 * (5 + 8 * 8 * 5 + 8) * 4 + 7 * 8 + 3)
diff --git a/18/input.small b/18/input.small
new file mode 100644
index 0000000..9a421d5
--- /dev/null
+++ b/18/input.small
@@ -0,0 +1 @@
+((2 + 4 * 9) * (6 + 9 * 8 + 6) + 6) + 2 + 4 * 2
diff --git a/18/src/expression.lalrpop b/18/src/expression.lalrpop
new file mode 100644
index 0000000..222a7e6
--- /dev/null
+++ b/18/src/expression.lalrpop
@@ -0,0 +1,54 @@
+grammar;
+
+pub Expression: i64 = {
+  <Term>,
+  <left:Expression> PLUS <right:Term> => {
+    left + right
+  },
+  <left:Expression> STAR <right:Term> => {
+    left * right
+  },
+};
+
+Term: i64 = {
+  NUMBER => {
+    <>.parse::<i64>().unwrap()
+  },
+  LEFT_PARENTHESIS <Expression> RIGHT_PARENTHESIS,
+};
+
+pub ExpressionPro: i64 = {
+  <Expression2Pro>,
+  <left:ExpressionPro> STAR <right:Expression2Pro> => {
+    left * right
+  },
+};
+
+Expression2Pro: i64 = {
+  <TermPro>,
+  <left:Expression2Pro> PLUS <right:TermPro> => {
+    left + right
+  },
+};
+
+TermPro: i64 = {
+  NUMBER => {
+    <>.parse::<i64>().unwrap()
+  },
+  LEFT_PARENTHESIS <ExpressionPro> RIGHT_PARENTHESIS,
+};
+
+match {
+  r"\p{Zs}+" => { },
+
+  r"[0-9]+" => NUMBER,
+
+  "+" => PLUS,
+
+  "*" => STAR,
+
+  "(" => LEFT_PARENTHESIS,
+
+  ")" => RIGHT_PARENTHESIS,
+}
+
diff --git a/18/src/main.rs b/18/src/main.rs
new file mode 100644
index 0000000..53554a2
--- /dev/null
+++ b/18/src/main.rs
@@ -0,0 +1,39 @@
+use advent_lib::prelude::*;
+
+//use std::convert::TryFrom;
+
+#[macro_use] extern crate lalrpop_util;
+
+lalrpop_mod!(pub expression);
+
+
+
+fn main() -> Result<()> {
+  let mut args = std::env::args();
+  if args.len() != 2 {
+    eprintln!("Usage: advent input");
+  }
+  let _ = args.next();
+  let filename = args.next().unwrap();
+
+  let input = advent_lib::read_lines_file(&filename)?;
+
+  let parser = expression::ExpressionParser::new();
+  let parser_pro = expression::ExpressionProParser::new();
+
+  let mut sum = 0;
+  let mut sum_pro = 0;
+
+  for line in &input {
+    let value = parser.parse(line)?;
+    sum += value;
+
+    let value_pro = parser_pro.parse(line)?;
+    sum_pro += value_pro;
+  }
+
+  println!("{}", sum);
+  println!("{}", sum_pro);
+
+  Ok(())
+}
diff --git a/18/tests/main.rs b/18/tests/main.rs
new file mode 100644
index 0000000..394fb0f
--- /dev/null
+++ b/18/tests/main.rs
@@ -0,0 +1,14 @@
+use assert_cmd::prelude::*;
+use std::process::Command;
+
+
+#[test]
+fn personal_input() -> Result<(), Box<dyn std::error::Error>> {
+  let mut command = Command::cargo_bin("advent_17")?;
+
+  command.arg("input");
+  command.assert().success().stdout("265\n1936\n");
+
+  Ok(())
+}
+
diff --git a/Cargo.lock b/Cargo.lock
index 38f47ce..102acf1 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -139,8 +139,21 @@ dependencies = [
 ]
 
 [[package]]
+name = "advent_18"
+version = "0.1.0"
+dependencies = [
+ "advent_lib",
+ "assert_cmd",
+ "lalrpop",
+ "lalrpop-util",
+]
+
+[[package]]
 name = "advent_lib"
 version = "0.1.0"
+dependencies = [
+ "lalrpop-util",
+]
 
 [[package]]
 name = "aho-corasick"
@@ -152,6 +165,27 @@ dependencies = [
 ]
 
 [[package]]
+name = "arrayref"
+version = "0.3.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a4c527152e37cf757a3f78aae5a06fbeefdb07ccc535c980a3208ee3060dd544"
+
+[[package]]
+name = "arrayvec"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "23b62fc65de8e4e7f52534fb52b0f3ed04746ae267519eef2a83941e8085068b"
+
+[[package]]
+name = "ascii-canvas"
+version = "2.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ff8eb72df928aafb99fe5d37b383f2fe25bd2a765e3e5f7c365916b6f2463a29"
+dependencies = [
+ "term",
+]
+
+[[package]]
 name = "assert_cmd"
 version = "0.10.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -164,12 +198,176 @@ dependencies = [
 ]
 
 [[package]]
+name = "atty"
+version = "0.2.14"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d9b39be18770d11421cdb1b9947a45dd3f37e93092cbf377614828a319d5fee8"
+dependencies = [
+ "hermit-abi",
+ "libc",
+ "winapi",
+]
+
+[[package]]
+name = "autocfg"
+version = "1.0.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
+
+[[package]]
+name = "base64"
+version = "0.13.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "904dfeac50f3cdaba28fc6f57fdcddb75f49ed61346676a78c4ffe55877802fd"
+
+[[package]]
+name = "bit-set"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6e11e16035ea35e4e5997b393eacbf6f63983188f7a2ad25bfb13465f5ad59de"
+dependencies = [
+ "bit-vec",
+]
+
+[[package]]
+name = "bit-vec"
+version = "0.6.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349f9b6a179ed607305526ca489b34ad0a41aed5f7980fa90eb03160b69598fb"
+
+[[package]]
+name = "blake2b_simd"
+version = "0.5.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "afa748e348ad3be8263be728124b24a24f268266f6f5d58af9d75f6a40b5c587"
+dependencies = [
+ "arrayref",
+ "arrayvec",
+ "constant_time_eq",
+]
+
+[[package]]
+name = "block-buffer"
+version = "0.7.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c0940dc441f31689269e10ac70eb1002a3a1d3ad1390e030043662eb7fe4688b"
+dependencies = [
+ "block-padding",
+ "byte-tools",
+ "byteorder",
+ "generic-array",
+]
+
+[[package]]
+name = "block-padding"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa79dedbb091f449f1f39e53edf88d5dbe95f895dae6135a8d7b881fb5af73f5"
+dependencies = [
+ "byte-tools",
+]
+
+[[package]]
+name = "byte-tools"
+version = "0.3.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
+
+[[package]]
+name = "byteorder"
+version = "1.3.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "08c48aae112d48ed9f069b33538ea9e3e90aa263cfa3d1c24309612b1f7472de"
+
+[[package]]
+name = "cfg-if"
+version = "0.1.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4785bdd1c96b2a846b2bd7cc02e86b6b3dbf14e7e53446c4f54c92a361040822"
+
+[[package]]
+name = "cfg-if"
+version = "1.0.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "baf1de4339761588bc0619e3cbc0120ee582ebb74b53b4efbf79117bd2da40fd"
+
+[[package]]
+name = "constant_time_eq"
+version = "0.1.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "245097e9a4535ee1e3e3931fcfcd55a796a44c643e8596ff6566d68f09b87bbc"
+
+[[package]]
+name = "crossbeam-utils"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "02d96d1e189ef58269ebe5b97953da3274d83a93af647c2ddd6f9dab28cedb8d"
+dependencies = [
+ "autocfg",
+ "cfg-if 1.0.0",
+ "lazy_static",
+]
+
+[[package]]
+name = "diff"
+version = "0.1.12"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "0e25ea47919b1560c4e3b7fe0aaab9becf5b84a10325ddf7db0f0ba5e1026499"
+
+[[package]]
 name = "difference"
 version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "524cbf6897b527295dff137cec09ecf3a05f4fddffd7dfcd1585403449e74198"
 
 [[package]]
+name = "digest"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "f3d0c8c8752312f9713efd397ff63acb9f85585afbf179282e720e7704954dd5"
+dependencies = [
+ "generic-array",
+]
+
+[[package]]
+name = "dirs"
+version = "1.0.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "3fd78930633bd1c6e35c4b42b1df7b0cbc6bc191146e512bb3bedf243fcc3901"
+dependencies = [
+ "libc",
+ "redox_users",
+ "winapi",
+]
+
+[[package]]
+name = "docopt"
+version = "1.1.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7f525a586d310c87df72ebcd98009e57f1cc030c8c268305287a476beb653969"
+dependencies = [
+ "lazy_static",
+ "regex",
+ "serde",
+ "strsim",
+]
+
+[[package]]
+name = "either"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e78d4f1cc4ae33bbfc157ed5d5a5ef3bc29227303d595861deb238fcec4e9457"
+
+[[package]]
+name = "ena"
+version = "0.14.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7402b94a93c24e742487327a7cd839dc9d36fec9de9fb25b09f2dae459f36c3"
+dependencies = [
+ "log",
+]
+
+[[package]]
 name = "escargot"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -180,24 +378,176 @@ dependencies = [
 ]
 
 [[package]]
+name = "fake-simd"
+version = "0.1.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e88a8acf291dafb59c2d96e8f59828f3838bb1a70398823ade51a84de6a6deed"
+
+[[package]]
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+version = "0.2.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "37ab347416e802de484e4d03c7316c48f1ecb56574dfd4a46a80f173ce1de04d"
+
+[[package]]
+name = "generic-array"
+version = "0.12.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c68f0274ae0e023facc3c97b2e00f076be70e254bc851d972503b328db79b2ec"
+dependencies = [
+ "typenum",
+]
+
+[[package]]
+name = "getrandom"
+version = "0.1.15"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fc587bc0ec293155d5bfa6b9891ec18a1e330c234f896ea47fbada4cadbe47e6"
+dependencies = [
+ "cfg-if 0.1.10",
+ "libc",
+ "wasi",
+]
+
+[[package]]
+name = "hashbrown"
+version = "0.9.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "d7afe4a420e3fe79967a00898cc1f4db7c8a49a9333a29f8a4bd76a253d5cd04"
+
+[[package]]
+name = "hermit-abi"
+version = "0.1.17"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5aca5565f760fb5b220e499d72710ed156fdb74e631659e99377d9ebfbd13ae8"
+dependencies = [
+ "libc",
+]
+
+[[package]]
+name = "indexmap"
+version = "1.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fb1fa934250de4de8aef298d81c729a7d33d8c239daa3a7575e6b92bfc7313b"
+dependencies = [
+ "autocfg",
+ "hashbrown",
+]
+
+[[package]]
+name = "itertools"
+version = "0.9.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "284f18f85651fe11e8a991b2adb42cb078325c996ed026d994719efcfca1d54b"
+dependencies = [
+ "either",
+]
+
+[[package]]
 name = "itoa"
 version = "0.4.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dc6f3ad7b9d11a0c00842ff8de1b60ee58661048eb8049ed33c73594f359d7e6"
 
 [[package]]
+name = "lalrpop"
+version = "0.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "60fb56191fb8ed5311597e5750debe6779c9fdb487dbaa5ff302592897d7a2c8"
+dependencies = [
+ "ascii-canvas",
+ "atty",
+ "bit-set",
+ "diff",
+ "docopt",
+ "ena",
+ "itertools",
+ "lalrpop-util",
+ "petgraph",
+ "regex",
+ "regex-syntax",
+ "serde",
+ "serde_derive",
+ "sha2",
+ "string_cache",
+ "term",
+ "unicode-xid",
+]
+
+[[package]]
+name = "lalrpop-util"
+version = "0.19.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6771161eff561647fad8bb7e745e002c304864fb8f436b52b30acda51fca4408"
+dependencies = [
+ "regex",
+]
+
+[[package]]
 name = "lazy_static"
 version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e2abad23fbc42b3700f2f279844dc832adb2b2eb069b2df918f455c4e18cc646"
 
 [[package]]
+name = "libc"
+version = "0.2.81"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "1482821306169ec4d07f6aca392a4681f66c75c9918aa49641a2595db64053cb"
+
+[[package]]
+name = "log"
+version = "0.4.11"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4fabed175da42fed1fa0746b0ea71f412aa9d35e76e95e59b192c64b9dc2bf8b"
+dependencies = [
+ "cfg-if 0.1.10",
+]
+
+[[package]]
 name = "memchr"
 version = "2.3.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0ee1c47aaa256ecabcaea351eae4a9b01ef39ed810004e298d2511ed284b1525"
 
 [[package]]
+name = "new_debug_unreachable"
+version = "1.0.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "e4a24736216ec316047a1fc4252e27dabb04218aa4a3f37c6e7ddbf1f9782b54"
+
+[[package]]
+name = "opaque-debug"
+version = "0.2.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "2839e79665f131bdb5782e51f2c6c9599c133c6098982a54c794358bf432529c"
+
+[[package]]
+name = "petgraph"
+version = "0.5.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "467d164a6de56270bd7c4d070df81d07beace25012d5103ced4e9ff08d6afdb7"
+dependencies = [
+ "fixedbitset",
+ "indexmap",
+]
+
+[[package]]
+name = "phf_shared"
+version = "0.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "c00cf8b9eafe68dde5e9eaa2cef8ee84a9336a47d566ec55ca16589633b65af7"
+dependencies = [
+ "siphasher",
+]
+
+[[package]]
+name = "precomputed-hash"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "925383efa346730478fb4838dbe9137d2a47675ad789c546d150a6e1dd4ab31c"
+
+[[package]]
 name = "predicates"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -242,6 +592,23 @@ dependencies = [
 ]
 
 [[package]]
+name = "redox_syscall"
+version = "0.1.57"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "41cc0f7e4d5d4544e8861606a285bb08d3e70712ccc7d2b84d7c0ccfaf4b05ce"
+
+[[package]]
+name = "redox_users"
+version = "0.3.5"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "de0737333e7a9502c789a36d7c7fa6092a49895d4faa31ca5df163857ded2e9d"
+dependencies = [
+ "getrandom",
+ "redox_syscall",
+ "rust-argon2",
+]
+
+[[package]]
 name = "regex"
 version = "1.4.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -260,6 +627,18 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3b181ba2dcf07aaccad5448e8ead58db5b742cf85dfe035e2227f137a539a189"
 
 [[package]]
+name = "rust-argon2"
+version = "0.8.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4b18820d944b33caa75a71378964ac46f58517c92b6ae5f762636247c09e78fb"
+dependencies = [
+ "base64",
+ "blake2b_simd",
+ "constant_time_eq",
+ "crossbeam-utils",
+]
+
+[[package]]
 name = "ryu"
 version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -297,6 +676,43 @@ dependencies = [
 ]
 
 [[package]]
+name = "sha2"
+version = "0.8.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "a256f46ea78a0c0d9ff00077504903ac881a1dafdc20da66545699e7776b3e69"
+dependencies = [
+ "block-buffer",
+ "digest",
+ "fake-simd",
+ "opaque-debug",
+]
+
+[[package]]
+name = "siphasher"
+version = "0.3.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "fa8f3741c7372e75519bd9346068370c9cdaabcc1f9599cbcf2a2719352286b7"
+
+[[package]]
+name = "string_cache"
+version = "0.8.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "8ddb1139b5353f96e429e1a5e19fbaf663bddedaa06d1dbd49f82e352601209a"
+dependencies = [
+ "lazy_static",
+ "new_debug_unreachable",
+ "phf_shared",
+ "precomputed-hash",
+ "serde",
+]
+
+[[package]]
+name = "strsim"
+version = "0.9.3"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "6446ced80d6c486436db5c078dde11a9f73d42b57fb273121e160b84f63d894c"
+
+[[package]]
 name = "syn"
 version = "1.0.53"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -308,6 +724,17 @@ dependencies = [
 ]
 
 [[package]]
+name = "term"
+version = "0.5.2"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "edd106a334b7657c10b7c540a0106114feadeb4dc314513e97df481d5d966f42"
+dependencies = [
+ "byteorder",
+ "dirs",
+ "winapi",
+]
+
+[[package]]
 name = "thread_local"
 version = "1.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
@@ -323,7 +750,41 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a7f741b240f1a48843f9b8e0444fb55fb2a4ff67293b50a9179dfd5ea67f8d41"
 
 [[package]]
+name = "typenum"
+version = "1.12.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "373c8a200f9e67a0c95e62a4f52fbf80c23b4381c05a17845531982fa99e6b33"
+
+[[package]]
 name = "unicode-xid"
 version = "0.2.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f7fe0bb3479651439c9112f72b6c505038574c9fbb575ed1bf3b797fa39dd564"
+
+[[package]]
+name = "wasi"
+version = "0.9.0+wasi-snapshot-preview1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "cccddf32554fecc6acb585f82a32a72e28b48f8c4c1883ddfeeeaa96f7d8e519"
+
+[[package]]
+name = "winapi"
+version = "0.3.9"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "5c839a674fcd7a98952e593242ea400abe93992746761e38641405d28b00f419"
+dependencies = [
+ "winapi-i686-pc-windows-gnu",
+ "winapi-x86_64-pc-windows-gnu",
+]
+
+[[package]]
+name = "winapi-i686-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
+
+[[package]]
+name = "winapi-x86_64-pc-windows-gnu"
+version = "0.4.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
diff --git a/Cargo.toml b/Cargo.toml
index c2dfe1d..75704cb 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -18,4 +18,5 @@ members = [
   "15",
   "16",
   "17",
+  "18",
 ]
diff --git a/lib/Cargo.toml b/lib/Cargo.toml
index f0a0859..6c46cec 100644
--- a/lib/Cargo.toml
+++ b/lib/Cargo.toml
@@ -5,3 +5,4 @@ authors = ["Irene Knapp <ireneista@gmail.com>"]
 edition = "2018"
 
 [dependencies]
+lalrpop-util = "0.19"
diff --git a/lib/src/error.rs b/lib/src/error.rs
index 216df78..4f594b7 100644
--- a/lib/src/error.rs
+++ b/lib/src/error.rs
@@ -39,3 +39,14 @@ impl From<std::num::ParseIntError> for Error {
     Error::Parse
   }
 }
+
+impl From<lalrpop_util::ParseError<usize, lalrpop_util::lexer::Token<'_>,
+  &str>> for Error
+{
+  fn from(_: lalrpop_util::ParseError<usize, lalrpop_util::lexer::Token<'_>,
+              &str>) -> Error
+  {
+    Error::Parse
+  }
+}
+