WIP Impl Action

src/symbols/mod.rs

@@ -2,6 +2,15 @@ use std::error::Error;
 use std::fmt::Display;
 use resources::Resource;
 
+pub trait Action {
+  fn run(&self) -> Result<(), Box<Error>>;
+}
+
+pub trait SymbolRunner {
+  fn run_symbol(&self, symbol: &Symbol) -> Result<(), Box<Error>>;
+}
+
+// Symbol
 pub trait Symbol: Display {
   fn target_reached(&self) -> Result<bool, Box<Error>>;
   fn execute(&self) -> Result<(), Box<Error>>;
@@ -11,6 +20,43 @@ pub trait Symbol: Display {
   fn provides(&self) -> Option<Vec<Resource>> {
     None
   }
+  fn as_action<'a>(&'a self, runner: &'a SymbolRunner) -> Box<Action + 'a>;
+  fn into_action<'a>(self: Box<Self>, runner: &'a SymbolRunner) -> Box<Action + 'a> where Self: 'a;
+}
+
+// SymbolAction
+struct SymbolAction<'a, S: Symbol + 'a> {
+  runner: &'a SymbolRunner,
+  symbol: &'a S
+}
+
+impl<'a, S: Symbol> SymbolAction<'a, S> {
+  fn new(runner: &'a SymbolRunner, symbol: &'a S) -> Self {
+    Self { runner: runner, symbol: symbol }
+  }
+}
+
+impl<'a, S: Symbol> Action for SymbolAction<'a, S> {
+  fn run(&self) -> Result<(), Box<Error>> {
+    self.runner.run_symbol(self.symbol)
+  }
+}
+
+struct OwnedSymbolAction<'a, S: Symbol + 'a> {
+  runner: &'a SymbolRunner,
+  symbol: S
+}
+
+impl<'a, S: Symbol + 'a> OwnedSymbolAction<'a, S> {
+  fn new(runner: &'a SymbolRunner, symbol: S) -> Self {
+    Self { runner: runner, symbol: symbol }
+  }
+}
+
+impl<'a, S: Symbol + 'a> Action for OwnedSymbolAction<'a, S> {
+  fn run(&self) -> Result<(), Box<Error>> {
+    self.runner.run_symbol(&self.symbol)
+  }
 }
 
 pub mod acme;