zed/assets/settings/default_semantic_token_rules.json

// Default semantic token rules for Zed (read-only).
//
// These rules map LSP semantic token types to syntax theme styles.
// To customize, add rules to "semantic_token_rules" in your settings.json.
// User-defined rules are prepended and take highest precedence.
// Extension language rules are applied next.
// These built-in defaults are applied last.
//
// Each rule has the following properties:
// - `token_type`: The LSP semantic token type to match. If omitted, matches all types.
// - `token_modifiers`: A list of LSP semantic token modifiers to match. All must be present.
// - `style`: A list of syntax theme styles to try. The first one found is used.
// - `foreground_color`: Override foreground color in hex format (e.g., "#ff0000").
// - `background_color`: Override background color in hex format.
// - `underline`: Boolean or color to underline with. If `true`, uses text color.
// - `strikethrough`: Boolean or color. If `true`, uses text color.
// - `font_weight`: One of "normal", "bold".
// - `font_style`: One of "normal", "italic".
//
// See the VSCode docs [1] and the LSP Spec [2] for reasoning behind these defaults.
//
// [1]: https://code.visualstudio.com/api/language-extensions/semantic-highlight-guide#standard-token-types-and-modifiers
// [2]: https://microsoft.github.io/language-server-protocol/specifications/lsp/3.17/specification/#semanticTokenTypes
[
  // Types
  {
    "token_type": "namespace",
    "token_modifiers": [],
    "style": ["namespace", "module", "type"],
  },
  {
    "token_type": "class",
    "token_modifiers": ["declaration"],
    "style": ["type.class.definition", "type.definition"],
  },
  {
    "token_type": "class",
    "token_modifiers": ["definition"],
    "style": ["type.class.definition", "type.definition"],
  },
  {
    "token_type": "class",
    "token_modifiers": [],
    "style": ["type.class", "class", "type"],
  },
  {
    "token_type": "enum",
    "token_modifiers": ["declaration"],
    "style": ["type.enum.definition", "type.definition"],
  },
  {
    "token_type": "enum",
    "token_modifiers": ["definition"],
    "style": ["type.enum.definition", "type.definition"],
  },
  {
    "token_type": "enum",
    "token_modifiers": [],
    "style": ["type.enum", "enum", "type"],
  },
  {
    "token_type": "interface",
    "token_modifiers": ["declaration"],
    "style": ["type.interface.definition", "type.definition"],
  },
  {
    "token_type": "interface",
    "token_modifiers": ["definition"],
    "style": ["type.interface.definition", "type.definition"],
  },
  {
    "token_type": "interface",
    "token_modifiers": [],
    "style": ["type.interface", "interface", "type"],
  },
  {
    "token_type": "struct",
    "token_modifiers": ["declaration"],
    "style": ["type.struct.definition", "type.definition"],
  },
  {
    "token_type": "struct",
    "token_modifiers": ["definition"],
    "style": ["type.struct.definition", "type.definition"],
  },
  {
    "token_type": "struct",
    "token_modifiers": [],
    "style": ["type.struct", "struct", "type"],
  },
  {
    "token_type": "typeParameter",
    "token_modifiers": ["declaration"],
    "style": ["type.parameter.definition", "type.definition"],
  },
  {
    "token_type": "typeParameter",
    "token_modifiers": ["definition"],
    "style": ["type.parameter.definition", "type.definition"],
  },
  {
    "token_type": "typeParameter",
    "token_modifiers": [],
    "style": ["type.parameter", "type"],
  },
  {
    "token_type": "type",
    "token_modifiers": ["declaration"],
    "style": ["type.definition"],
  },
  {
    "token_type": "type",
    "token_modifiers": ["definition"],
    "style": ["type.definition"],
  },
  {
    "token_type": "type",
    "token_modifiers": [],
    "style": ["type"],
  },
  // References
  {
    "token_type": "parameter",
    "token_modifiers": [],
    "style": ["variable"],
  },
  {
    "token_type": "variable",
    "token_modifiers": ["defaultLibrary", "constant"],
    "style": ["constant.builtin"],
  },
  {
    "token_type": "variable",
    "token_modifiers": ["defaultLibrary"],
    "style": ["variable.builtin"],
  },
  {
    "token_type": "variable",
    "token_modifiers": ["constant"],
    "style": ["constant"],
  },
  {
    "token_type": "variable",
    "token_modifiers": [],
    "style": ["variable"],
  },
  {
    "token_type": "property",
    "token_modifiers": [],
    "style": ["property"],
  },
  {
    "token_type": "enumMember",
    "token_modifiers": [],
    "style": ["type.enum.member", "type.enum", "variant"],
  },
  {
    "token_type": "decorator",
    "token_modifiers": [],
    "style": ["function.decorator", "function.annotation", "attribute"],
  },
  // Declarations in the docs, but in practice, also references
  {
    "token_type": "function",
    "token_modifiers": ["defaultLibrary"],
    "style": ["function.builtin"],
  },
  {
    "token_type": "function",
    "token_modifiers": [],
    "style": ["function"],
  },
  {
    "token_type": "method",
    "token_modifiers": ["defaultLibrary"],
    "style": ["function.builtin"],
  },
  {
    "token_type": "method",
    "token_modifiers": [],
    "style": ["function.method", "function"],
  },
  {
    "token_type": "macro",
    "token_modifiers": [],
    "style": ["function.macro", "function"],
  },
  {
    "token_type": "label",
    "token_modifiers": [],
    "style": ["label"],
  },
  // Tokens
  {
    "token_type": "comment",
    "token_modifiers": ["documentation"],
    "style": ["comment.documentation", "comment.doc"],
  },
  {
    "token_type": "comment",
    "token_modifiers": [],
    "style": ["comment"],
  },
  {
    "token_type": "string",
    "token_modifiers": [],
    "style": ["string"],
  },
  {
    "token_type": "keyword",
    "token_modifiers": [],
    "style": ["keyword"],
  },
  {
    "token_type": "number",
    "token_modifiers": [],
    "style": ["number"],
  },
  {
    "token_type": "regexp",
    "token_modifiers": [],
    "style": ["string.regexp", "string"],
  },
  {
    "token_type": "operator",
    "token_modifiers": [],
    "style": ["operator"],
  },
  // Not in the VS Code docs, but in the LSP spec.
  {
    "token_type": "modifier",
    "token_modifiers": [],
    "style": ["keyword.modifier"],
  },
  // C#
  {
    "token_type": "event",
    "token_modifiers": [],
    "style": ["type.event", "type"],
  },
]