Refactored NumberUnit and FunctionDefinition. Added OctalNumber. Fixed number followed by identifier with no whitespace.

test/libsolidity/syntaxTests/denominations/invalid_denomination_no_whitespace.sol

@@ -0,0 +1,5 @@
+contract C {
+	uint constant y = 1wei;
+}
+// ----
+// ParserError 8936: (32-33): Identifier-start is not allowed at end of a number.

test/libsolidity/syntaxTests/denominations/two_denominations_same_literal.sol

@@ -0,0 +1,5 @@
+contract C {
+	uint constant y = 8 gwei ether;
+}
+// ----
+// ParserError 2314: (39-44): Expected ';' but got 'ether'

test/libsolidity/syntaxTests/freeFunctions/named_fallback_warning.sol

@@ -0,0 +1,3 @@
+function fallback() {}
+// ----
+// Warning 3445: (9-17): This function is named "fallback" but is not the fallback function of the contract. If you intend this to be a fallback function, use "fallback(...) { ... }" without the "function" keyword to define it.

test/libsolidity/syntaxTests/freeFunctions/named_receive_warning.sol

@@ -0,0 +1,3 @@
+function receive() {}
+// ----
+// Warning 3445: (9-16): This function is named "receive" but is not the receive function of the contract. If you intend this to be a receive function, use "receive(...) { ... }" without the "function" keyword to define it.

test/libsolidity/syntaxTests/literals/invalid_hex_number.sol

@@ -0,0 +1,5 @@
+contract C {
+    uint x = 0x1000abcdefgh;
+}
+// ----
+// ParserError 8936: (26-38): Identifier-start is not allowed at end of a number.

test/libsolidity/syntaxTests/literals/invalid_octal_denomination_no_whitespace.sol

@@ -0,0 +1,5 @@
+contract C {
+    uint y = 01gwei;
+}
+// ----
+// ParserError 8936: (26-27): Octal numbers not allowed.

test/libsolidity/syntaxTests/literals/invalid_octal_digits.sol

@@ -0,0 +1,5 @@
+contract C {
+    uint y = 098;
+}
+// ----
+// ParserError 8936: (26-27): Octal numbers not allowed.

test/libsolidity/syntaxTests/literals/invalid_octal_number.sol

@@ -0,0 +1,5 @@
+contract C {
+    uint x = 0100;
+}
+// ----
+// ParserError 8936: (26-27): Octal numbers not allowed.