zls/src/analysis.zig
Alexandros Naskos f25dade27d Removed comments
2020-05-09 05:43:17 +03:00

132 lines
4.5 KiB
Zig

const std = @import("std");
const ast = std.zig.ast;
/// REALLY BAD CODE, PLEASE DON'T USE THIS!!!!!!! (only for testing)
pub fn getFunctionByName(tree: *ast.Tree, name: []const u8) ?*ast.Node.FnProto {
var decls = tree.root_node.decls.iterator(0);
while (decls.next()) |decl_ptr| {
var decl = decl_ptr.*;
switch (decl.id) {
.FnProto => {
const func = decl.cast(ast.Node.FnProto).?;
if (std.mem.eql(u8, tree.tokenSlice(func.name_token.?), name)) return func;
},
else => {}
}
}
return null;
}
/// Gets a function's doc comments, caller must free memory when a value is returned
/// Like:
///```zig
///var comments = getFunctionDocComments(allocator, tree, func);
///defer if (comments) |comments_pointer| allocator.free(comments_pointer);
///```
pub fn getDocComments(allocator: *std.mem.Allocator, tree: *ast.Tree, node: *ast.Node) !?[]const u8 {
switch (node.id) {
.FnProto => {
const func = node.cast(ast.Node.FnProto).?;
if (func.doc_comments) |doc_comments| {
var doc_it = doc_comments.lines.iterator(0);
var lines = std.ArrayList([]const u8).init(allocator);
defer lines.deinit();
while (doc_it.next()) |doc_comment| {
_ = try lines.append(std.fmt.trim(tree.tokenSlice(doc_comment.*)[3..]));
}
return try std.mem.join(allocator, "\n", lines.items);
} else {
return null;
}
},
.VarDecl => {
const var_decl = node.cast(ast.Node.VarDecl).?;
if (var_decl.doc_comments) |doc_comments| {
var doc_it = doc_comments.lines.iterator(0);
var lines = std.ArrayList([]const u8).init(allocator);
defer lines.deinit();
while (doc_it.next()) |doc_comment| {
_ = try lines.append(std.fmt.trim(tree.tokenSlice(doc_comment.*)[3..]));
}
return try std.mem.join(allocator, "\n", lines.items);
} else {
return null;
}
},
else => return null
}
}
/// Gets a function signature (keywords, name, return value)
pub fn getFunctionSignature(tree: *ast.Tree, func: *ast.Node.FnProto) []const u8 {
const start = tree.tokens.at(func.firstToken()).start;
const end = tree.tokens.at(switch (func.return_type) {
.Explicit, .InferErrorSet => |node| node.lastToken()
}).end;
return tree.source[start..end];
}
/// Gets a function snippet insert text
pub fn getFunctionSnippet(allocator: *std.mem.Allocator, tree: *ast.Tree, func: *ast.Node.FnProto) ![]const u8 {
const name_tok = func.name_token orelse unreachable;
var buffer = std.ArrayList(u8).init(allocator);
try buffer.ensureCapacity(128);
try buffer.appendSlice(tree.tokenSlice(name_tok));
try buffer.append('(');
var buf_stream = buffer.outStream();
var param_num = @as(usize, 1);
var param_it = func.params.iterator(0);
while (param_it.next()) |param_ptr| : (param_num += 1) {
const param = param_ptr.*;
if (param_num != 1) try buffer.appendSlice(", ${")
else try buffer.appendSlice("${");
try buf_stream.print("{}:", .{param_num});
var curr_tok = param.firstToken();
const end_tok = param.lastToken();
var first_tok = true;
while (curr_tok <= end_tok) : (curr_tok += 1) {
try buffer.appendSlice(tree.tokenSlice(curr_tok));
if (!first_tok and curr_tok != end_tok) try buffer.append(' ')
else first_tok = false;
}
try buffer.append('}');
}
try buffer.append(')');
return buffer.toOwnedSlice();
}
/// Gets a function signature (keywords, name, return value)
pub fn getVariableSignature(tree: *ast.Tree, var_decl: *ast.Node.VarDecl) []const u8 {
const start = tree.tokens.at(var_decl.firstToken()).start;
const end = tree.tokens.at(var_decl.semicolon_token).start;
// var end =
// if (var_decl.init_n) |body| tree.tokens.at(body.firstToken()).start
// else tree.tokens.at(var_decl.name_token).end;
return tree.source[start..end];
}
// STYLE
pub fn isCamelCase(name: []const u8) bool {
return !std.ascii.isUpper(name[0]) and std.mem.indexOf(u8, name, "_") == null;
}
pub fn isPascalCase(name: []const u8) bool {
return std.ascii.isUpper(name[0]) and std.mem.indexOf(u8, name, "_") == null;
}