parser: add error file

Author: tcoratger

crates/leanVm/src/parser/error.rs

@@ -0,0 +1,24 @@
+use crate::parser::Rule;
+
+#[derive(Debug)]
+pub enum ParseError {
+    PestError(Box<pest::error::Error<Rule>>),
+    SemanticError(String),
+}
+
+impl From<pest::error::Error<Rule>> for ParseError {
+    fn from(error: pest::error::Error<Rule>) -> Self {
+        Self::PestError(Box::new(error))
+    }
+}
+
+impl std::fmt::Display for ParseError {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match self {
+            Self::PestError(e) => write!(f, "Parse error: {e}"),
+            Self::SemanticError(e) => write!(f, "Semantic error: {e}"),
+        }
+    }
+}
+
+impl std::error::Error for ParseError {}

crates/leanVm/src/parser/mod.rs

@@ -13,33 +13,13 @@ use crate::{
     },
 };
 
+pub mod error;
+pub use error::*;
+
 #[derive(Parser, Debug)]
 #[grammar = "grammar.pest"]
 pub struct LangParser;
 
-#[derive(Debug)]
-pub enum ParseError {
-    PestError(Box<pest::error::Error<Rule>>),
-    SemanticError(String),
-}
-
-impl From<pest::error::Error<Rule>> for ParseError {
-    fn from(error: pest::error::Error<Rule>) -> Self {
-        Self::PestError(Box::new(error))
-    }
-}
-
-impl std::fmt::Display for ParseError {
-    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
-        match self {
-            Self::PestError(e) => write!(f, "Parse error: {e}"),
-            Self::SemanticError(e) => write!(f, "Semantic error: {e}"),
-        }
-    }
-}
-
-impl std::error::Error for ParseError {}
-
 pub fn parse_program(input: &str) -> Result<Program, ParseError> {
     let input = remove_comments(input);
     let mut pairs = LangParser::parse(Rule::program, &input)?;