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Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "webster"
+version = "0.1.0"
+authors = ["Colin Reeder <colin@vpzom.click>"]
+edition = "2018"
+
+[dependencies]
+lalrpop-util = "0.17.2"
+regex = "1.2.1"
+
+[build-dependencies]
+lalrpop = "0.17.2"

build.rs

@@ -0,0 +1,3 @@
+fn main() {
+    lalrpop::process_root().unwrap();
+}

src/main.rs

@@ -0,0 +1,36 @@
+use lalrpop_util::lalrpop_mod;
+lalrpop_mod!(pub parser);
+
+#[derive(Debug)]
+pub enum Type {
+    I8,
+    I16,
+    I32,
+    I64,
+    U8,
+    U16,
+    U32,
+    U64,
+}
+
+#[derive(Debug)]
+pub struct TypeDef {
+    name: String,
+    ty: Type,
+}
+
+fn main() {
+    let result = parser::TypeFileParser::new().parse("Test = uint8\nTestAgain = int32").unwrap();
+    for def in result {
+        println!("type {} = {};", def.name, match def.ty {
+            Type::I8 => "i8",
+            Type::I16 => "i16",
+            Type::I32 => "i32",
+            Type::I64 => "i64",
+            Type::U8 => "u8",
+            Type::U16 => "u16",
+            Type::U32 => "u32",
+            Type::U64 => "u64",
+        });
+    }
+}

src/parser.lalrpop

@@ -0,0 +1,16 @@
+grammar;
+
+pub TypeDef: crate::TypeDef = <name:Ident> "=" <ty:Type> => crate::TypeDef { name: name.to_owned(), ty };
+Ident: &'input str = <s:r"[A-Za-z]+"> => s;
+Type: crate::Type = {
+	"int8" => crate::Type::I8,
+	"int16" => crate::Type::I16,
+	"int32" => crate::Type::I32,
+	"int64" => crate::Type::I64,
+	"uint8" => crate::Type::U8,
+	"uint16" => crate::Type::U16,
+	"uint32" => crate::Type::U32,
+	"uint64" => crate::Type::U64,
+};
+
+pub TypeFile: Vec<crate::TypeDef> = (TypeDef)*;