{
  "$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
  "name": "El",
  "scopeName": "source.el",
  "fileTypes": ["el"],
  "patterns": [
    { "include": "#comments" },
    { "include": "#strings" },
    { "include": "#function-definition" },
    { "include": "#keywords" },
    { "include": "#types" },
    { "include": "#constants" },
    { "include": "#numbers" },
    { "include": "#operators" },
    { "include": "#function-call" },
    { "include": "#identifiers" }
  ],
  "repository": {

    "comments": {
      "name": "comment.line.double-slash.el",
      "match": "//.*$"
    },

    "strings": {
      "name": "string.quoted.double.el",
      "begin": "\"",
      "end": "\"",
      "patterns": [
        {
          "name": "constant.character.escape.el",
          "match": "\\\\[nrt\\\\\"']"
        }
      ]
    },

    "function-definition": {
      "comment": "Highlight 'fn name(' — the name gets entity.name.function scope",
      "match": "\\bfn\\s+([a-zA-Z_][a-zA-Z0-9_]*)\\s*\\(",
      "captures": {
        "0": { "name": "meta.function.el" },
        "1": { "name": "entity.name.function.el" }
      }
    },

    "keywords": {
      "patterns": [
        {
          "comment": "Control-flow keywords",
          "name": "keyword.control.el",
          "match": "\\b(if|else|while|for|in|return|match)\\b"
        },
        {
          "comment": "Declaration keywords",
          "name": "keyword.declaration.el",
          "match": "\\b(fn|let|type|enum|import|from|as)\\b"
        },
        {
          "comment": "Reserved future keywords",
          "name": "keyword.other.el",
          "match": "\\b(cgi|vessel|activate|where|sealed|with|test|seed|assert|protocol|impl|retry|times|fallback|reason|parallel|trace|requires|deploy|to|via|target|manager|engine|accessor)\\b"
        }
      ]
    },

    "types": {
      "comment": "Built-in El types",
      "name": "support.type.el",
      "match": "\\b(String|Int|Float|Bool|Void|Any|Map|List)\\b"
    },

    "constants": {
      "patterns": [
        {
          "name": "constant.language.boolean.el",
          "match": "\\b(true|false)\\b"
        }
      ]
    },

    "numbers": {
      "patterns": [
        {
          "name": "constant.numeric.float.el",
          "match": "\\b[0-9]+\\.[0-9]+\\b"
        },
        {
          "name": "constant.numeric.integer.el",
          "match": "\\b[0-9]+\\b"
        }
      ]
    },

    "operators": {
      "patterns": [
        {
          "name": "keyword.operator.comparison.el",
          "match": "(==|!=|<=|>=|<|>)"
        },
        {
          "name": "keyword.operator.logical.el",
          "match": "(&&|\\|\\||!)"
        },
        {
          "name": "keyword.operator.assignment.el",
          "match": "(?<![=!<>])=(?!=)"
        },
        {
          "name": "keyword.operator.arithmetic.el",
          "match": "[+\\-*/%]"
        },
        {
          "name": "keyword.operator.arrow.el",
          "match": "->"
        }
      ]
    },

    "function-call": {
      "comment": "Highlight function calls: name( — name gets entity.name.function scope",
      "match": "\\b([a-zA-Z_][a-zA-Z0-9_]*)\\s*(?=\\()",
      "captures": {
        "1": { "name": "entity.name.function.call.el" }
      }
    },

    "identifiers": {
      "comment": "General identifiers — lower priority than other rules",
      "name": "variable.other.el",
      "match": "\\b[a-zA-Z_][a-zA-Z0-9_]*\\b"
    }
  }
}