Change return of MacroProcessor to Result

1 files changed, 23 insertions, 0 deletions

diff --git a/src/macro_processor/error.rs b/src/macro_processor/error.rs
new file mode 100644
index 0000000..074a8ef
--- /dev/null
+++ b/src/macro_processor/error.rs
@@ -0,0 +1,23 @@
+use std::error::Error;
+use std::fmt;
+
+#[derive(Debug)]
+pub enum SMPError {
+    IncludeError(u8, std::io::Error, String),
+    ShellCommandError(u8, Box<dyn Error>),
+}
+
+impl fmt::Display for SMPError {
+    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
+        match self {
+            SMPError::IncludeError(code, _, file) => {
+                write!(f, "[SMP{}] Error reading file \"{}\"", code, file)
+            }
+            SMPError::ShellCommandError(code, e) => {
+                write!(f, "[SMP{}] Error running shell command \"{:#?}\"", code, e)
+            }
+        }
+    }
+}
+
+impl std::error::Error for SMPError {}