Add highlights query for Solidity

lua/nvim-treesitter/parsers.lua

@@ -959,6 +959,15 @@ list.lalrpop = {
   maintainers = { "@traxys" },
 }
 
+list.solidity = {
+  install_info = {
+    url = "https://github.com/YongJieYongJie/tree-sitter-solidity",
+    branch = "with-generated-c-code",
+    files = { "src/parser.c" },
+  },
+  maintainers = { "@YongJieYongJie" },
+}
+
 local M = {
   list = list,
   filetype_to_parsername = filetype_to_parsername,

queries/solidity/highlights.scm

@@ -0,0 +1,193 @@
+(comment) @comment
+(
+ (comment) @attribute
+ (#match? @attribute "^/// .*")
+) ;; Handles natspec comments
+
+; Pragma
+(pragma_directive) @tag
+
+
+; Literals
+[
+ (string)
+ (hex_string_literal)
+ (unicode_string_literal)
+ (yul_string_literal)
+] @string
+[
+ (number_literal)
+ (yul_decimal_number)
+ (yul_hex_number)
+] @number
+[
+ (true)
+ (false)
+] @constant.builtin
+
+
+; Type
+(type_name) @type
+(primitive_type) @type
+(contract_declaration name: (identifier) @type)
+(struct_declaration struct_name: (identifier) @type)
+; (struct_member name: (identifier) @field) ;; Technically correct, but makes highlight worst
+(enum_declaration enum_type_name: (identifier) @type)
+; Color payable in payable address conversion as type and not as keyword
+(payable_conversion_expression "payable" @type)
+(emit_statement . (identifier) @type)
+; Handles ContractA, ContractB in function foo() override(ContractA, contractB) {} 
+(override_specifier (identifier) @type)
+; Ensures that delimiters in mapping( ... => .. ) are not colored like types
+(type_name "(" @punctuation.bracket "=>" @punctuation.delimiter ")" @punctuation.bracket)
+
+
+; Functions and parameters
+
+(function_definition
+  function_name:  (identifier) @function)
+(modifier_definition
+  name:  (identifier) @function)
+(yul_evm_builtin) @function.builtin
+
+; Use contructor coloring for special functions
+(constructor_definition "constructor" @constructor)
+(fallback_receive_definition "receive" @constructor)
+(fallback_receive_definition "fallback" @constructor)
+
+(modifier_invocation (identifier) @function)
+
+; Handles expressions like structVariable.g();
+(call_expression . (member_expression (property_identifier) @function.method))
+
+; Handles expressions like g();
+(call_expression . (identifier) @function)
+
+; Handles the field in struct literals like MyStruct({MyField: MyVar * 2})
+(call_expression (identifier) @field . ":")
+
+; Function parameters
+(event_paramater name: (identifier) @variable.parameter)
+(function_definition
+  function_name:  (identifier) @variable.parameter)
+
+; Yul functions
+(yul_function_call function: (yul_identifier) @function)
+
+; Yul function parameters
+(yul_function_definition . (yul_identifier) @function (yul_identifier) @variable.parameter)
+
+(meta_type_expression "type" @keyword)
+
+(member_expression (property_identifier) @property)
+(property_identifier) @property
+(struct_expression ((identifier) @property . ":"))
+(enum_value) @property
+
+
+; Keywords
+[
+ "pragma"
+ "import"
+ "contract"
+ "interface"
+ "library"
+ "is"
+ "struct"
+ "enum"
+ "event"
+ "using"
+ "assembly"
+ "switch"
+ "case"
+ "default"
+ "break"
+ "continue"
+ "if"
+ "else"
+ "for"
+ "while"
+ "do"
+ "try"
+ "catch"
+ "return"
+ "emit"
+ "public"
+ "internal"
+ "private"
+ "external"
+ "pure"
+ "view"
+ "payable"
+ "modifier"
+ "returns"
+ "memory"
+ "storage"
+ "calldata"
+ "function"
+ "var"
+ (constant)
+ (virtual)
+ (override_specifier)
+ (yul_leave)
+] @keyword
+
+(import_directive "as" @keyword)
+(import_directive "from" @keyword)
+(event_paramater "indexed" @keyword)
+
+; Punctuation
+
+[
+  "("
+  ")"
+  "["
+  "]"
+  "{"
+  "}"
+]  @punctuation.bracket
+
+
+[
+  "."
+  ","
+] @punctuation.delimiter
+
+
+; Operators
+
+[
+  "&&"
+  "||"
+  ">>"
+  ">>>"
+  "<<"
+  "&"
+  "^"
+  "|"
+  "+"
+  "-"
+  "*"
+  "/"
+  "%"
+  "**"
+  "<"
+  "<="
+  "=="
+  "!="
+  "!=="
+  ">="
+  ">"
+  "!"
+  "~"
+  "-"
+  "+"
+  "delete"
+  "new"
+  "++"
+  "--"
+] @operator
+
+(identifier) @variable
+(yul_identifier) @variable
+

tests/query/highlights/solidity/test.sol

@@ -0,0 +1,173 @@
+// Example contract from official documentation at https://github.com/ethereum/solidity/blob/v0.8.12/docs/examples/voting.rst
+
+// SPDX-License-Identifier: GPL-3.0
+// ^ comment
+pragma solidity >=0.7.0 <0.9.0;
+// ^ keyword
+//     ^ tag
+/// @title Voting with delegation.
+//  ^ attribute
+contract Ballot {
+// ^keyword
+//       ^ type
+    // This declares a new complex type which will
+    // be used for variables later.
+    // It will represent a single voter.
+    struct Voter {
+//         ^ type
+        uint weight; // weight is accumulated by delegation
+//      ^ type
+//           ^ variable
+        bool voted;  // if true, that person already voted
+        address delegate; // person delegated to
+        uint vote;   // index of the voted proposal
+    }
+
+    // This is a type for a single proposal.
+    struct Proposal {
+        bytes32 name;   // short name (up to 32 bytes)
+        uint voteCount; // number of accumulated votes
+    }
+
+    address public chairperson;
+//  ^ type
+
+    // This declares a state variable that
+    // stores a `Voter` struct for each possible address.
+    mapping(address => Voter) public voters;
+//         ^                ^ punctuation.bracket
+//                  ^ punctuation.delimiter
+
+    // A dynamically-sized array of `Proposal` structs.
+    Proposal[] public proposals;
+
+    /// Create a new ballot to choose one of `proposalNames`.
+    constructor(bytes32[] memory proposalNames) {
+//  ^ constructor
+        chairperson = msg.sender;
+        voters[chairperson].weight = 1;
+
+        // For each of the provided proposal names,
+        // create a new proposal object and add it
+        // to the end of the array.
+        for (uint i = 0; i < proposalNames.length; i++) {
+            // `Proposal({...})` creates a temporary
+            // Proposal object and `proposals.push(...)`
+            // appends it to the end of `proposals`.
+            proposals.push(Proposal({
+                name: proposalNames[i],
+//              ^ field
+                voteCount: 0
+            }));
+        }
+    }
+
+    // Give `voter` the right to vote on this ballot.
+    // May only be called by `chairperson`.
+    function giveRightToVote(address voter) external {
+//  ^ keyword
+//           ^ function
+        // If the first argument of `require` evaluates
+        // to `false`, execution terminates and all
+        // changes to the state and to Ether balances
+        // are reverted.
+        // This used to consume all gas in old EVM versions, but
+        // not anymore.
+        // It is often a good idea to use `require` to check if
+        // functions are called correctly.
+        // As a second argument, you can also provide an
+        // explanation about what went wrong.
+        require(
+            msg.sender == chairperson,
+            "Only chairperson can give right to vote."
+        );
+        require(
+            !voters[voter].voted,
+            "The voter already voted."
+        );
+        require(voters[voter].weight == 0);
+        voters[voter].weight = 1;
+    }
+
+    /// Delegate your vote to the voter `to`.
+    function delegate(address to) external {
+        // assigns reference
+        Voter storage sender = voters[msg.sender];
+        require(!sender.voted, "You already voted.");
+
+        require(to != msg.sender, "Self-delegation is disallowed.");
+
+        // Forward the delegation as long as
+        // `to` also delegated.
+        // In general, such loops are very dangerous,
+        // because if they run too long, they might
+        // need more gas than is available in a block.
+        // In this case, the delegation will not be executed,
+        // but in other situations, such loops might
+        // cause a contract to get "stuck" completely.
+        while (voters[to].delegate != address(0)) {
+            to = voters[to].delegate;
+
+            // We found a loop in the delegation, not allowed.
+            require(to != msg.sender, "Found loop in delegation.");
+        }
+
+        // Since `sender` is a reference, this
+        // modifies `voters[msg.sender].voted`
+        Voter storage delegate_ = voters[to];
+
+        // Voters cannot delegate to wallets that cannot vote.
+        require(delegate_.weight >= 1);
+        sender.voted = true;
+        sender.delegate = to;
+        if (delegate_.voted) {
+            // If the delegate already voted,
+            // directly add to the number of votes
+            proposals[delegate_.vote].voteCount += sender.weight;
+        } else {
+            // If the delegate did not vote yet,
+            // add to her weight.
+            delegate_.weight += sender.weight;
+        }
+    }
+
+    /// Give your vote (including votes delegated to you)
+    /// to proposal `proposals[proposal].name`.
+    function vote(uint proposal) external {
+        Voter storage sender = voters[msg.sender];
+        require(sender.weight != 0, "Has no right to vote");
+        require(!sender.voted, "Already voted.");
+        sender.voted = true;
+        sender.vote = proposal;
+
+        // If `proposal` is out of the range of the array,
+        // this will throw automatically and revert all
+        // changes.
+        proposals[proposal].voteCount += sender.weight;
+    }
+
+    /// @dev Computes the winning proposal taking all
+    /// previous votes into account.
+    function winningProposal() public view
+            returns (uint winningProposal_)
+    {
+        uint winningVoteCount = 0;
+        for (uint p = 0; p < proposals.length; p++) {
+            if (proposals[p].voteCount > winningVoteCount) {
+                winningVoteCount = proposals[p].voteCount;
+                winningProposal_ = p;
+            }
+        }
+    }
+
+    // Calls winningProposal() function to get the index
+    // of the winner contained in the proposals array and then
+    // returns the name of the winner
+    function winnerName() external view
+            returns (bytes32 winnerName_)
+    {
+        winnerName_ = proposals[winningProposal()].name;
+    }
+}
+
+// vim:ft=solidity