From d9928c8953cab5386c4e213fcdbf1d4753d88e5a Mon Sep 17 00:00:00 2001
From: duaraghav8 <duaraghav8@gmail.com>
Date: Tue, 26 Dec 2017 21:32:57 +0530
Subject: [PATCH] fix #21

---
 solidity.pegjs        | 14 +++++++++++++-
 test/doc_examples.sol | 20 ++++++++++++++++++++
 2 files changed, 33 insertions(+), 1 deletion(-)

diff --git a/solidity.pegjs b/solidity.pegjs
index 4b9d756..ecd6af5 100755
--- a/solidity.pegjs
+++ b/solidity.pegjs
@@ -384,7 +384,19 @@ UnicodeEscapeSequence
     }
 
 VersionLiteral
-  = operator:(RelationalOperator / EqualityOperator / BitwiseXOROperator)? __ ("v")? major:DecimalIntegerLiteral "." minor:DecimalIntegerLiteral "." patch:DecimalIntegerLiteral {
+  = operator:(RelationalOperator / EqualityOperator / BitwiseXOROperator)? __ ("v")? major:DecimalIntegerLiteral minor:("." DecimalIntegerLiteral)? patch:("." DecimalIntegerLiteral)? {
+    if (patch === null) {
+      patch = 0;
+    } else {
+      patch = patch[1];
+    }
+
+    if (minor === null) {
+      minor = 0;
+    } else {
+      minor = minor[1];
+    }
+
     return {
       type: "VersionLiteral",
       operator: operator,
diff --git a/test/doc_examples.sol b/test/doc_examples.sol
index ebfeede..cdb2192 100755
--- a/test/doc_examples.sol
+++ b/test/doc_examples.sol
@@ -11,6 +11,26 @@ pragma solidity > 0.4.0;
 pragma solidity != 0.4.0;
 pragma solidity >=0.4.0 <0.4.8; // from https://github.com/ethereum/solidity/releases/tag/v0.4.0
 
+pragma solidity 0.4;
+pragma solidity v0.4;
+pragma solidity ^0.4;
+pragma solidity >= 0.4;
+pragma solidity <= 0.4;
+pragma solidity < 0.5;
+pragma solidity > 0.4;
+pragma solidity != 0.4;
+pragma solidity >=0.4 <=0.4;
+
+pragma solidity 0;
+pragma solidity v0;
+pragma solidity ^0;
+pragma solidity >= 0;
+pragma solidity <= 0;
+pragma solidity < 1;
+pragma solidity > 0;
+pragma solidity != 0;
+pragma solidity >=0 <=1;
+
 
 // Pragma statements that enable experimental (breaking) features
 pragma experimental "SMTChecker";