Lex and parse explosions

2 files changed, 9 insertions, 0 deletions

diff --git a/src/lexer.js b/src/lexer.js
index 5e29e42..85579fb 100644
--- a/src/lexer.js
+++ b/src/lexer.js
@@ -24,6 +24,7 @@ newLexemeType('+', '\\+')
 newLexemeType('-', '-')
 newLexemeType('(', '\\(')
 newLexemeType(')', '\\)')
+newLexemeType('E', 'E')
 newSkippableLexeme('whitespace', '\\s+')
 
 const lex = (expressionString) => {
diff --git a/src/parser.js b/src/parser.js
index 3437f1a..9479abc 100644
--- a/src/parser.js
+++ b/src/parser.js
@@ -47,6 +47,14 @@ newSymbol('d', (parser) => {
   }
 })
 
+newSymbol('E', null, 30, (left, parser) => {
+  return {
+    type: 'E',
+    left: left,
+    right: parser.expression(29)
+  }
+})
+
 newSymbol('+', null, 20, (left, parser) => {
   return {
     type: 'add',