Increment and decrement via ++ or --

parser/src/ast/statement.rs

@@ -43,6 +43,9 @@ pub enum Statement {
     Return(Option<Expression>),
     Break,
     Continue,
+
+    Increment(Expression),
+    Decrement(Expression),
 }
 
 #[derive(Debug, Clone, Serialize)]

parser/src/grammar.pest

@@ -324,6 +324,8 @@ statement = _{
   | continue_stmt
   | block
   | var_decl_statement
+  | increment_statement
+  | decrement_statement
 }
 
 // ------------------------------------------------------
@@ -354,6 +356,14 @@ assign_statement = {
     expr ~ "=" ~ expr ~ semicolon
 }
 
+increment_statement = {
+    expr ~ "++" ~ semicolon
+}
+
+decrement_statement = {
+    expr ~ "--" ~ semicolon
+}
+
 compound_assign = {
     "+="
   | "-="

parser/src/parser/common/statement.rs

@@ -114,6 +114,14 @@ impl<'a> TryFrom<pest::iterators::Pair<'a, Rule>> for Statement {
                 })
             }
 
+            Rule::increment_statement => {
+                ast_expr!(Statement::Increment(inner.next().unwrap().try_into()))
+            }
+
+            Rule::decrement_statement => {
+                ast_expr!(Statement::Decrement(inner.next().unwrap().try_into()))
+            }
+
             Rule::unexpected_statement => {
                 return Err(AstError {
                     span: pair.as_span(),