Merge pull request #14 from SuperAuguste/completion
Start implementing completion
This commit is contained in:
Auguste Rame
GitHub
commit
adbcaefe26
157
src/analysis.zig
157
src/analysis.zig
@ -148,3 +148,160 @@ pub fn isCamelCase(name: []const u8) bool {
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pub fn isPascalCase(name: []const u8) bool {
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return std.ascii.isUpper(name[0]) and std.mem.indexOf(u8, name, "_") == null;
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}
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// ANALYSIS ENGINE
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/// Gets the child of node
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pub fn getChild(tree: *std.zig.ast.Tree, node: *std.zig.ast.Node, name: []const u8) ?*std.zig.ast.Node {
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var index: usize = 0;
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while (node.iterate(index)) |child| {
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switch (child.id) {
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.VarDecl => {
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const vari = child.cast(std.zig.ast.Node.VarDecl).?;
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if (std.mem.eql(u8, tree.tokenSlice(vari.name_token), name)) return child;
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},
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.FnProto => {
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const func = child.cast(std.zig.ast.Node.FnProto).?;
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if (func.name_token != null and std.mem.eql(u8, tree.tokenSlice(func.name_token.?), name)) return child;
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},
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.ContainerField => {
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const field = child.cast(std.zig.ast.Node.ContainerField).?;
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if (std.mem.eql(u8, tree.tokenSlice(field.name_token), name)) return child;
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},
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else => {}
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}
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index += 1;
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}
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return null;
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}
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/// Resolves the type of a node
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pub fn resolveTypeOfNode(tree: *std.zig.ast.Tree, node: *std.zig.ast.Node) ?*std.zig.ast.Node {
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switch (node.id) {
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.VarDecl => {
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const vari = node.cast(std.zig.ast.Node.VarDecl).?;
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return resolveTypeOfNode(tree, vari.type_node orelse vari.init_node.?) orelse null;
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},
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.FnProto => {
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const func = node.cast(std.zig.ast.Node.FnProto).?;
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switch (func.return_type) {
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.Explicit, .InferErrorSet => |return_type| {return resolveTypeOfNode(tree, return_type);}
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}
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},
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.Identifier => {
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if (getChild(tree, &tree.root_node.base, tree.getNodeSource(node))) |child| {
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return resolveTypeOfNode(tree, child);
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} else return null;
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},
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.ContainerDecl => {
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return node;
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},
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.ContainerField => {
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const field = node.cast(std.zig.ast.Node.ContainerField).?;
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return resolveTypeOfNode(tree, field.type_expr.?);
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},
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.SuffixOp => {
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const suffix_op = node.cast(std.zig.ast.Node.SuffixOp).?;
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switch (suffix_op.op) {
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.Call => {
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return resolveTypeOfNode(tree, suffix_op.lhs.node);
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},
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else => {}
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}
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},
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.InfixOp => {
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const infix_op = node.cast(std.zig.ast.Node.InfixOp).?;
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switch (infix_op.op) {
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.Period => {
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var left = resolveTypeOfNode(tree, infix_op.lhs).?;
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return getChild(tree, left, nodeToString(tree, infix_op.rhs));
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},
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else => {}
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}
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},
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else => {
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std.debug.warn("Type resolution case not implemented; {}\n", .{node.id});
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}
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}
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return null;
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}
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pub fn getNodeFromTokens(tree: *std.zig.ast.Tree, node: *std.zig.ast.Node, tokenizer: *std.zig.Tokenizer) ?*std.zig.ast.Node {
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var current_node = node;
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while (true) {
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var next = tokenizer.next();
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switch (next.id) {
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.Eof => {
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return current_node;
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},
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.Identifier => {
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// var root = current_node.cast(std.zig.ast.Node.Root).?;
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// current_node.
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if (getChild(tree, current_node, tokenizer.buffer[next.start..next.end])) |child| {
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if (resolveTypeOfNode(tree, child)) |node_type| {
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if (resolveTypeOfNode(tree, child)) |child_type| {
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current_node = child_type;
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} else return null;
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}
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} else return null;
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},
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.Period => {
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var after_period = tokenizer.next();
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if (after_period.id == .Eof) {
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return current_node;
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} else if (after_period.id == .Identifier) {
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if (getChild(tree, current_node, tokenizer.buffer[after_period.start..after_period.end])) |child| {
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if (resolveTypeOfNode(tree, child)) |child_type| {
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current_node = child_type;
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} else return null;
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} else return null;
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}
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},
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else => {
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std.debug.warn("Not implemented; {}\n", .{next.id});
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}
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}
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}
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return current_node;
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}
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pub fn getCompletionsFromNode(allocator: *std.mem.Allocator, tree: *std.zig.ast.Tree, node: *std.zig.ast.Node) ![]*std.zig.ast.Node {
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var nodes = std.ArrayList(*std.zig.ast.Node).init(allocator);
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var index: usize = 0;
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while (node.iterate(index)) |child_node| {
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try nodes.append(child_node);
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index += 1;
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}
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return nodes.items;
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}
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pub fn nodeToString(tree: *std.zig.ast.Tree, node: *std.zig.ast.Node) []const u8 {
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switch (node.id) {
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.ContainerField => {
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const field = node.cast(std.zig.ast.Node.ContainerField).?;
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return tree.tokenSlice(field.name_token);
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},
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.Identifier => {
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const field = node.cast(std.zig.ast.Node.Identifier).?;
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return tree.tokenSlice(field.token);
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},
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else => {
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std.debug.warn("INVALID: {}\n", .{node.id});
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}
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}
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return "";
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}
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pub fn nodesToString(tree: *std.zig.ast.Tree, maybe_nodes: ?[]*std.zig.ast.Node) void {
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if (maybe_nodes) |nodes| {
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for (nodes) |node| {
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std.debug.warn("- {}\n", .{nodeToString(tree, node)});
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}
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} else std.debug.warn("No nodes\n", .{});
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}
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50
src/main.zig
50
src/main.zig
@ -298,6 +298,54 @@ fn completeGlobal(id: i64, document: *types.TextDocument, config: Config) !void
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});
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}
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fn completeFieldAccess(id: i64, document: *types.TextDocument, position: types.Position, config: Config) !void {
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if (document.sane_text) |sane_text| {
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var tree = try std.zig.parse(allocator, sane_text);
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defer tree.deinit();
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// We use a local arena allocator to deallocate all temporary data without iterating
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var arena = std.heap.ArenaAllocator.init(allocator);
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var completions = std.ArrayList(types.CompletionItem).init(&arena.allocator);
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// Deallocate all temporary data.
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defer arena.deinit();
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var line = try document.getLine(@intCast(usize, position.line));
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try log("{}", .{line});
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var tokenizer = std.zig.Tokenizer.init(line);
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if (analysis.getNodeFromTokens(tree, &tree.root_node.base, &tokenizer)) |node| {
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var index: usize = 0;
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while (node.iterate(index)) |child_node| {
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try completions.append(.{
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.label = analysis.nodeToString(tree, child_node),
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.kind = .Variable,
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});
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index += 1;
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}
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}
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try send(types.Response{
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.id = .{.Integer = id},
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.result = .{
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.CompletionList = .{
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.isIncomplete = false,
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.items = completions.items,
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},
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},
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});
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} else {
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return try send(types.Response{
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.id = .{.Integer = id},
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.result = .{
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.CompletionList = .{
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.isIncomplete = false,
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.items = &[_]types.CompletionItem{},
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},
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},
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});
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}
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}
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// Compute builtin completions at comptime.
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const builtin_completions = block: {
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@ -565,6 +613,8 @@ fn processJsonRpc(parser: *std.json.Parser, json: []const u8, config: Config) !v
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});
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} else if (pos_context == .var_access or pos_context == .empty) {
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try completeGlobal(id, document, config);
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} else if (pos_context == .field_access) {
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try completeFieldAccess(id, document, pos, config);
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} else {
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try respondGeneric(id, no_completions_response);
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}
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@ -158,6 +158,18 @@ pub const TextDocument = struct {
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return @intCast(usize, index);
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}
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pub fn getLine(self: TextDocument, target_line: usize) ![]const u8 {
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var split_iterator = std.mem.split(self.text, "\n");
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var line: i64 = 0;
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while (line < target_line) : (line += 1) {
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_ = split_iterator.next() orelse return error.InvalidParams;
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}
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if (split_iterator.next()) |next| {
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return next;
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} else return error.InvalidParams;
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}
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};
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pub const TextEdit = struct {
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