Fix tabs in SolcReferenceFormatterHuman

liblangutil/SourceReferenceFormatterHuman.cpp

@@ -23,6 +23,7 @@
 #include <liblangutil/Exceptions.h>
 #include <libsolutil/UTF8.h>
 #include <iomanip>
+#include <string_view>
 
 using namespace std;
 using namespace solidity;
@@ -30,6 +31,20 @@ using namespace solidity::langutil;
 using namespace solidity::util;
 using namespace solidity::util::formatting;
 
+namespace
+{
+
+std::string replaceNonTabs(std::string_view _utf8Input, char _filler)
+{
+	std::string output;
+	for (char const c: _utf8Input)
+		if ((c & 0xc0) != 0x80)
+			output.push_back(c == '\t' ? '\t' : _filler);
+	return output;
+}
+
+}
+
 AnsiColorized SourceReferenceFormatterHuman::normalColored() const
 {
 	return AnsiColorized(m_stream, m_colored, {WHITE});
@@ -85,6 +100,8 @@ void SourceReferenceFormatterHuman::printSourceLocation(SourceReference const& _
 	frameColored() << "-->";
 	m_stream << ' ' << _ref.sourceName << ':' << line << ':' << (_ref.position.column + 1) << ":\n";
 
+	string_view text = _ref.text;
+
 	if (!_ref.multiline)
 	{
 		int const locationLength = _ref.endColumn - _ref.startColumn;
@@ -96,21 +113,15 @@ void SourceReferenceFormatterHuman::printSourceLocation(SourceReference const& _
 
 		// line 2:
 		frameColored() << line << " |";
-		m_stream << ' ' << _ref.text.substr(0, _ref.startColumn);
+		m_stream << ' ' << text.substr(0, _ref.startColumn);
-		highlightColored() << _ref.text.substr(_ref.startColumn, locationLength);
+		highlightColored() << text.substr(_ref.startColumn, locationLength);
-		m_stream << _ref.text.substr(_ref.endColumn) << '\n';
+		m_stream << text.substr(_ref.endColumn) << '\n';
 
 		// line 3:
 		m_stream << leftpad << ' ';
 		frameColored() << '|';
-		m_stream << ' ';
+		m_stream << ' ' << replaceNonTabs(text.substr(0, _ref.startColumn), ' ');
-
+		diagColored() << replaceNonTabs(text.substr(_ref.startColumn, locationLength), '^');
-		for_each(
-			_ref.text.cbegin(),
-			_ref.text.cbegin() + numCodepoints(_ref.text.substr(0, _ref.startColumn)),
-			[this](char ch) { m_stream << (ch == '\t' ? '\t' : ' '); }
-		);
-		diagColored() << string(numCodepoints(_ref.text.substr(_ref.startColumn, locationLength)), '^');
 		m_stream << '\n';
 	}
 	else
@@ -122,13 +133,13 @@ void SourceReferenceFormatterHuman::printSourceLocation(SourceReference const& _
 
 		// line 2:
 		frameColored() << line << " |";
-		m_stream << ' ' << _ref.text.substr(0, _ref.startColumn);
+		m_stream << ' ' << text.substr(0, _ref.startColumn);
-		highlightColored() << _ref.text.substr(_ref.startColumn) << '\n';
+		highlightColored() << text.substr(_ref.startColumn) << '\n';
 
 		// line 3:
 		m_stream << leftpad << ' ';
 		frameColored() << '|';
-		m_stream << ' ' << string(_ref.startColumn, ' ');
+		m_stream << ' ' << replaceNonTabs(text.substr(0, _ref.startColumn), ' ');
 		diagColored() << "^ (Relevant source part starts here and spans across multiple lines).";
 		m_stream << '\n';
 	}

libsolutil/UTF8.cpp

@@ -138,13 +138,4 @@ bool validateUTF8(std::string const& _input, size_t& _invalidPosition)
 	return validateUTF8(reinterpret_cast<unsigned char const*>(_input.c_str()), _input.length(), _invalidPosition);
 }
 
-size_t numCodepoints(std::string const& _utf8EncodedInput)
-{
-	size_t codepoint = 0;
-	for (char c: _utf8EncodedInput)
-		codepoint += (c & 0xc0) != 0x80;
-
-	return codepoint;
-}
-
 }

libsolutil/UTF8.h

@@ -38,6 +38,4 @@ inline bool validateUTF8(std::string const& _input)
 	return validateUTF8(_input, invalidPos);
 }
 
-size_t numCodepoints(std::string const& _utf8EncodedInput);
-
 }

test/cmdlineTests/message_format_utf16/err

@@ -1,11 +0,0 @@
-Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing "SPDX-License-Identifier: <SPDX-License>" to each source file. Use "SPDX-License-Identifier: UNLICENSED" for non-open-source code. Please see https://spdx.org for more information.
---> message_format_utf16/input.sol
-
-Warning: Source file does not specify required compiler version!
---> message_format_utf16/input.sol
-
-Warning: Statement has no effect.
- --> message_format_utf16/input.sol:2:58:
-  |
-2 | /* ©©©©ﾩ©©©©© 2017 */ constructor () public { "©©©©ﾩ©©©©©" ; }
-  |                                               ^^^^^^^^^^^^

test/cmdlineTests/message_format_utf16/input.sol

@@ -1,3 +0,0 @@
-contract Foo {
-/* ©©©©ﾩ©©©©© 2017 */ constructor () public { "©©©©ﾩ©©©©©" ; }
-}

test/cmdlineTests/message_format_utf8/err

@@ -0,0 +1,35 @@
+Warning: SPDX license identifier not provided in source file. Before publishing, consider adding a comment containing "SPDX-License-Identifier: <SPDX-License>" to each source file. Use "SPDX-License-Identifier: UNLICENSED" for non-open-source code. Please see https://spdx.org for more information.
+--> message_format_utf8/input.sol
+
+Warning: Source file does not specify required compiler version!
+--> message_format_utf8/input.sol
+
+Warning: Statement has no effect.
+ --> message_format_utf8/input.sol:2:58:
+  |
+2 | /* ©©©©ﾩ©©©©© 2017 */ constructor () public { "©©©©ﾩ©©©©©" ; }
+  |                                               ^^^^^^^^^^^^
+
+Warning: Statement has no effect.
+ --> message_format_utf8/input.sol:6:25:
+  |
+6 |                         "S = π × r²";
+  |                         ^^^^^^^^^^^^
+
+Warning: Statement has no effect.
+ --> message_format_utf8/input.sol:7:39:
+  |
+7 | /* ₀₁₂₃₄⁵⁶⁷⁸⁹ */		"∑ 1/n! ≈ 2.7";                 // tabs in-between
+  |                 		^^^^^^^^^^^^^^
+
+Warning: Statement has no effect.
+ --> message_format_utf8/input.sol:8:30:
+  |
+8 | /* Ŀŏŗėɯ ïƥŝʉɱ */		"μὴ		χεῖρον		βέλτιστον"; // tabs in-between and inside
+  |                  		^^^		^^^^^^		^^^^^^^^^^
+
+Warning: Function state mutability can be restricted to pure
+  --> message_format_utf8/input.sol:12:2:
+   |
+12 | 	function selector() public returns(uint) { // starts with tab
+   | 	^ (Relevant source part starts here and spans across multiple lines).

test/cmdlineTests/message_format_utf8/input.sol

@@ -0,0 +1,15 @@
+contract Foo {
+/* ©©©©ﾩ©©©©© 2017 */ constructor () public { "©©©©ﾩ©©©©©" ; }
+
+    function f() public pure {
+
+                        "S = π × r²";
+/* ₀₁₂₃₄⁵⁶⁷⁸⁹ */		"∑ 1/n! ≈ 2.7";                 // tabs in-between
+/* Ŀŏŗėɯ ïƥŝʉɱ */		"μὴ		χεῖρον		βέλτιστον"; // tabs in-between and inside
+
+    }
+
+	function selector() public returns(uint) { // starts with tab
+		return 0;
+	}
+}