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-rw-r--r--src/libexpr/lexer.l2
-rw-r--r--src/libexpr/parser.y5
2 files changed, 7 insertions, 0 deletions
diff --git a/src/libexpr/lexer.l b/src/libexpr/lexer.l
index fe2ff75d0d1c..3b7c6bb57a06 100644
--- a/src/libexpr/lexer.l
+++ b/src/libexpr/lexer.l
@@ -101,6 +101,8 @@ or          { return OR_KW; }
 
 \=\=        { return EQ; }
 \!\=        { return NEQ; }
+\<\=        { return LEQ; }
+\>\=        { return GEQ; }
 \&\&        { return AND; }
 \|\|        { return OR; }
 \-\>        { return IMPL; }
diff --git a/src/libexpr/parser.y b/src/libexpr/parser.y
index d998c840e151..cd1b0e21fa7c 100644
--- a/src/libexpr/parser.y
+++ b/src/libexpr/parser.y
@@ -269,6 +269,7 @@ void yyerror(YYLTYPE * loc, yyscan_t scanner, ParseData * data, const char * err
 %left OR
 %left AND
 %nonassoc EQ NEQ
+%left '<' '>' LEQ GEQ
 %right UPDATE
 %left NOT
 %left '+' '-'
@@ -312,6 +313,10 @@ expr_op
   | '-' expr_op %prec NEGATE { $$ = new ExprApp(new ExprApp(new ExprVar(data->symbols.create("__sub")), new ExprInt(0)), $2); }
   | expr_op EQ expr_op { $$ = new ExprOpEq($1, $3); }
   | expr_op NEQ expr_op { $$ = new ExprOpNEq($1, $3); }
+  | expr_op '<' expr_op { $$ = new ExprApp(new ExprApp(new ExprVar(data->symbols.create("__lessThan")), $1), $3); }
+  | expr_op LEQ expr_op { $$ = new ExprOpNot(new ExprApp(new ExprApp(new ExprVar(data->symbols.create("__lessThan")), $3), $1)); }
+  | expr_op '>' expr_op { $$ = new ExprApp(new ExprApp(new ExprVar(data->symbols.create("__lessThan")), $3), $1); }
+  | expr_op GEQ expr_op { $$ = new ExprOpNot(new ExprApp(new ExprApp(new ExprVar(data->symbols.create("__lessThan")), $1), $3)); }
   | expr_op AND expr_op { $$ = new ExprOpAnd($1, $3); }
   | expr_op OR expr_op { $$ = new ExprOpOr($1, $3); }
   | expr_op IMPL expr_op { $$ = new ExprOpImpl($1, $3); }