a05acaf9fd
It doesn't actually do terminal color yet because we need to add cross platform terminal color abstractions. But it toggles between the single line error reporting and the multiline error reporting. See #1026
88 lines
2.4 KiB
Zig
88 lines
2.4 KiB
Zig
const std = @import("std");
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const mem = std.mem;
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const os = std.os;
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const Token = std.zig.Token;
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const ast = std.zig.ast;
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const TokenIndex = std.zig.ast.TokenIndex;
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pub const Color = enum {
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Auto,
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Off,
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On,
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};
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pub const Msg = struct {
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path: []const u8,
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text: []u8,
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first_token: TokenIndex,
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last_token: TokenIndex,
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tree: &ast.Tree,
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};
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/// `path` must outlive the returned Msg
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/// `tree` must outlive the returned Msg
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/// Caller owns returned Msg and must free with `allocator`
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pub fn createFromParseError(
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allocator: &mem.Allocator,
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parse_error: &const ast.Error,
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tree: &ast.Tree,
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path: []const u8,
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) !&Msg {
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const loc_token = parse_error.loc();
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var text_buf = try std.Buffer.initSize(allocator, 0);
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defer text_buf.deinit();
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var out_stream = &std.io.BufferOutStream.init(&text_buf).stream;
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try parse_error.render(&tree.tokens, out_stream);
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const msg = try allocator.construct(Msg{
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.tree = tree,
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.path = path,
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.text = text_buf.toOwnedSlice(),
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.first_token = loc_token,
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.last_token = loc_token,
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});
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errdefer allocator.destroy(msg);
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return msg;
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}
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pub fn printToStream(stream: var, msg: &const Msg, color_on: bool) !void {
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const first_token = msg.tree.tokens.at(msg.first_token);
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const last_token = msg.tree.tokens.at(msg.last_token);
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const start_loc = msg.tree.tokenLocationPtr(0, first_token);
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const end_loc = msg.tree.tokenLocationPtr(first_token.end, last_token);
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if (!color_on) {
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try stream.print(
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"{}:{}:{}: error: {}\n",
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msg.path,
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start_loc.line + 1,
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start_loc.column + 1,
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msg.text,
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);
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return;
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}
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try stream.print(
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"{}:{}:{}: error: {}\n{}\n",
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msg.path,
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start_loc.line + 1,
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start_loc.column + 1,
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msg.text,
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msg.tree.source[start_loc.line_start..start_loc.line_end],
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);
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try stream.writeByteNTimes(' ', start_loc.column);
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try stream.writeByteNTimes('~', last_token.end - first_token.start);
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try stream.write("\n");
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}
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pub fn printToFile(file: &os.File, msg: &const Msg, color: Color) !void {
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const color_on = switch (color) {
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Color.Auto => file.isTty(),
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Color.On => true,
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Color.Off => false,
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};
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var stream = &std.io.FileOutStream.init(file).stream;
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return printToStream(stream, msg, color_on);
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}
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