{
  "name": "Scheme",
  "scopeName": "source.scheme",
  "patterns": [
    {
      "include": "#comment"
    },
    {
      "include": "#sexp"
    },
    {
      "include": "#string"
    },
    {
      "include": "#language-functions"
    },
    {
      "include": "#quote"
    },
    {
      "include": "#illegal"
    }
  ],
  "repository": {
    "comment": {
      "begin": "(^[ \\t]+)?(?=;)",
      "end": "(?!\\G)",
      "patterns": [
        {
          "name": "comment.line.semicolon.scheme",
          "begin": ";",
          "end": "\\n",
          "beginCaptures": {
            "0": {
              "name": "punctuation.definition.comment.scheme"
            }
          }
        }
      ],
      "beginCaptures": {
        "1": {
          "name": "punctuation.whitespace.comment.leading.scheme"
        }
      }
    },
    "constants": {
      "patterns": [
        {
          "name": "constant.language.boolean.scheme",
          "match": "#[t|f]"
        },
        {
          "name": "constant.numeric.scheme",
          "match": "(?\u003c=[\\(\\s])((#e|#i)?[0-9]+(\\.[0-9]+)?|(#x)[0-9a-fA-F]+|(#o)[0-7]+|(#b)[01]+)(?=[\\s;()'\",\\[\\]])"
        }
      ]
    },
    "illegal": {
      "name": "invalid.illegal.parenthesis.scheme",
      "match": "[()]"
    },
    "language-functions": {
      "patterns": [
        {
          "name": "keyword.control.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(?\u003c=(\\s|\\(|\\[)) # preceded by space or ( \n\t\t\t\t\t\t( do|or|and|else|quasiquote|begin|if|case|set!|\n\t\t\t\t\t\t  cond|let|unquote|define|let\\*|unquote-splicing|delay|\n\t\t\t\t\t\t  letrec)\n\t\t\t\t\t\t(?=(\\s|\\())"
        },
        {
          "name": "support.function.boolean-test.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(?\u003c=(\\s|\\()) # preceded by space or (\n\t\t\t\t\t\t( char-alphabetic|char-lower-case|char-numeric|\n\t\t\t\t\t\t  char-ready|char-upper-case|char-whitespace|\n\t\t\t\t\t\t  (?:char|string)(?:-ci)?(?:=|\u003c=?|\u003e=?)|\n\t\t\t\t\t\t  atom|boolean|bound-identifier=|char|complex|\n\t\t\t\t\t\t  identifier|integer|symbol|free-identifier=|inexact|\n\t\t\t\t\t\t  eof-object|exact|list|(?:input|output)-port|pair|\n\t\t\t\t\t\t  real|rational|zero|vector|negative|odd|null|string|\n\t\t\t\t\t\t  eq|equal|eqv|even|number|positive|procedure\n\t\t\t\t\t\t)\n\t\t\t\t\t\t(\\?)\t\t# name ends with ? sign\n\t\t\t\t\t\t(?=(\\s|\\()) # followed by space or (\n\t\t\t\t\t"
        },
        {
          "name": "support.function.convert-type.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(?\u003c=(\\s|\\()) # preceded by space or (\n\t\t\t\t\t\t( char-\u003einteger|exact-\u003einexact|inexact-\u003eexact|\n\t\t\t\t\t\t  integer-\u003echar|symbol-\u003estring|list-\u003evector|\n\t\t\t\t\t\t  list-\u003estring|identifier-\u003esymbol|vector-\u003elist|\n\t\t\t\t\t\t  string-\u003elist|string-\u003enumber|string-\u003esymbol|\n\t\t\t\t\t\t  number-\u003estring\n\t\t\t\t\t\t)\n\t\t\t\t\t\t(?=(\\s|\\()) # followed by space or (\t\t\t\t\t\n\t\t\t\t\t"
        },
        {
          "name": "support.function.with-side-effects.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(?\u003c=(\\s|\\()) # preceded by space or (\n\t\t\t\t\t\t( set-(?:car|cdr)|\t\t\t\t # set car/cdr\n\t\t\t\t\t\t  (?:vector|string)-(?:fill|set) # fill/set string/vector\n\t\t\t\t\t\t)\n\t\t\t\t\t\t(!)\t\t\t# name ends with ! sign\n\t\t\t\t\t\t(?=(\\s|\\()) # followed by space or (\n\t\t\t\t\t"
        },
        {
          "name": "keyword.operator.arithmetic.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(?\u003c=(\\s|\\()) # preceded by space or (\n\t\t\t\t\t\t( \u003e=?|\u003c=?|=|[*/+-])\n\t\t\t\t\t\t(?=(\\s|\\()) # followed by space or (\n\t\t\t\t\t\t"
        },
        {
          "name": "support.function.general.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(?\u003c=(\\s|\\()) # preceded by space or (\n\t\t\t\t\t\t( append|apply|approximate|\n\t\t\t\t\t\t  call-with-current-continuation|call/cc|catch|\n\t\t\t\t\t\t  construct-identifier|define-syntax|display|foo|\n\t\t\t\t\t\t  for-each|force|cd|gen-counter|gen-loser|\n\t\t\t\t\t\t  generate-identifier|last-pair|length|let-syntax|\n\t\t\t\t\t\t  letrec-syntax|list|list-ref|list-tail|load|log|\n\t\t\t\t\t\t  macro|magnitude|map|map-streams|max|member|memq|\n\t\t\t\t\t\t  memv|min|newline|nil|not|peek-char|rationalize|\n\t\t\t\t\t\t  read|read-char|return|reverse|sequence|substring|\n\t\t\t\t\t\t  syntax|syntax-rules|transcript-off|transcript-on|\n\t\t\t\t\t\t  truncate|unwrap-syntax|values-list|write|write-char|\n\t\t\t\t\t\t  \n\t\t\t\t\t\t  # cons, car, cdr, etc\n\t\t\t\t\t\t  cons|c(a|d){1,4}r| \n                          \n\t\t\t\t\t\t  # unary math operators\n\t\t\t\t\t\t  abs|acos|angle|asin|assoc|assq|assv|atan|ceiling|\n\t\t\t\t\t\t  cos|floor|round|sin|sqrt|tan|\n\t\t\t\t\t\t  (?:real|imag)-part|numerator|denominator\n                          \n\t\t\t\t\t\t  # other math operators\n\t\t\t\t\t\t  modulo|exp|expt|remainder|quotient|lcm|\n                          \n\t\t\t\t\t\t  # ports / files\n\t\t\t\t\t\t  call-with-(?:input|output)-file|\n\t\t\t\t\t\t  (?:close|current)-(?:input|output)-port|\n\t\t\t\t\t\t  with-(?:input|output)-from-file|\n\t\t\t\t\t\t  open-(?:input|output)-file|\n\t\t\t\t\t\t  \n\t\t\t\t\t\t  # char-«foo»\n\t\t\t\t\t\t  char-(?:downcase|upcase|ready)|\n\t\t\t\t\t\t  \n\t\t\t\t\t\t  # make-«foo»\n\t\t\t\t\t\t  make-(?:polar|promise|rectangular|string|vector)\n\t\t\t\t\t\t  \n\t\t\t\t\t\t  # string-«foo», vector-«foo»\n\t\t\t\t\t\t  string(?:-(?:append|copy|length|ref))?|\n\t\t\t\t\t\t  vector(?:-length|-ref)\n\t\t\t\t\t\t)\n\t\t\t\t\t\t(?=(\\s|\\()) # followed by space or (\n\t\t\t\t\t"
        }
      ]
    },
    "quote": {
      "patterns": [
        {
          "name": "constant.other.symbol.scheme",
          "match": "(?x)\n\t\t\t\t\t\t(')\\s*\n\t\t\t\t\t\t([[:alnum:]][[:alnum:]!$%\u0026*+-./:\u003c=\u003e?@^_~]*)\n\t\t\t\t\t",
          "captures": {
            "1": {
              "name": "punctuation.section.quoted.symbol.scheme"
            }
          }
        },
        {
          "name": "constant.other.empty-list.schem",
          "match": "(?x)\n\t\t\t\t\t\t(')\\s*\n\t\t\t\t\t\t((\\()\\s*(\\)))\n\t\t\t\t\t",
          "captures": {
            "1": {
              "name": "punctuation.section.quoted.empty-list.scheme"
            },
            "2": {
              "name": "meta.expression.scheme"
            },
            "3": {
              "name": "punctuation.section.expression.begin.scheme"
            },
            "4": {
              "name": "punctuation.section.expression.end.scheme"
            }
          }
        },
        {
          "name": "string.other.quoted-object.scheme",
          "begin": "(')\\s*",
          "end": "(?=[\\s()])|(?\u003c=\\n)",
          "patterns": [
            {
              "include": "#quoted"
            }
          ],
          "beginCaptures": {
            "1": {
              "name": "punctuation.section.quoted.scheme"
            }
          }
        }
      ]
    },
    "quote-sexp": {
      "contentName": "string.other.quote.scheme",
      "begin": "(?\u003c=\\()\\s*(quote)\\b\\s*",
      "end": "(?=[\\s)])|(?\u003c=\\n)",
      "patterns": [
        {
          "include": "#quoted"
        }
      ],
      "beginCaptures": {
        "1": {
          "name": "keyword.control.quote.scheme"
        }
      }
    },
    "quoted": {
      "patterns": [
        {
          "include": "#string"
        },
        {
          "name": "meta.expression.scheme",
          "begin": "(\\()",
          "end": "(\\))",
          "patterns": [
            {
              "include": "#quoted"
            }
          ],
          "beginCaptures": {
            "1": {
              "name": "punctuation.section.expression.begin.scheme"
            }
          },
          "endCaptures": {
            "1": {
              "name": "punctuation.section.expression.end.scheme"
            }
          }
        },
        {
          "include": "#quote"
        },
        {
          "include": "#illegal"
        }
      ]
    },
    "sexp": {
      "name": "meta.expression.scheme",
      "begin": "(\\()",
      "end": "(\\))(\\n)?",
      "patterns": [
        {
          "include": "#comment"
        },
        {
          "name": "meta.declaration.procedure.scheme",
          "begin": "(?x)\n\t\t\t\t\t\t(?\u003c=\\()       # preceded by (\n\t\t\t\t\t\t(define)\\s+   # define\n\t\t\t\t\t\t(\\()          # list of parameters\n\t\t\t\t\t\t  ([[:alnum:]][[:alnum:]!$%\u0026*+-./:\u003c=\u003e?@^_~]*)\n\t\t\t\t\t\t  ((\\s+\n\t\t\t\t\t\t    ([[:alnum:]][[:alnum:]!$%\u0026*+-./:\u003c=\u003e?@^_~]*|[._])\n\t\t\t\t\t\t   )*\n\t\t\t\t\t\t  )\\s*\n\t\t\t\t\t\t(\\))\n\t\t\t\t\t",
          "end": "(?=\\))",
          "patterns": [
            {
              "include": "#comment"
            },
            {
              "include": "#sexp"
            },
            {
              "include": "#illegal"
            }
          ],
          "captures": {
            "1": {
              "name": "keyword.control.scheme"
            },
            "2": {
              "name": "punctuation.definition.function.scheme"
            },
            "3": {
              "name": "entity.name.function.scheme"
            },
            "4": {
              "name": "variable.parameter.function.scheme"
            },
            "7": {
              "name": "punctuation.definition.function.scheme"
            }
          }
        },
        {
          "name": "meta.declaration.procedure.scheme",
          "begin": "(?x)\n\t\t\t\t\t\t(?\u003c=\\() # preceded by (\n\t\t\t\t\t\t(lambda)\\s+\n\t\t\t\t\t\t(\\() # opening paren\n\t\t\t\t\t\t((?:\n\t\t\t\t\t\t  ([[:alnum:]][[:alnum:]!$%\u0026*+-./:\u003c=\u003e?@^_~]*|[._])\n\t\t\t\t\t\t  \\s+\n\t\t\t\t\t\t)*(?:\n\t\t\t\t\t\t  ([[:alnum:]][[:alnum:]!$%\u0026*+-./:\u003c=\u003e?@^_~]*|[._])\n\t\t\t\t\t\t)?)\n\t\t\t\t\t\t(\\)) # closing paren\n\t\t\t\t\t",
          "end": "(?=\\))",
          "patterns": [
            {
              "include": "#comment"
            },
            {
              "include": "#sexp"
            },
            {
              "include": "#illegal"
            }
          ],
          "captures": {
            "1": {
              "name": "keyword.control.scheme"
            },
            "2": {
              "name": "punctuation.definition.variable.scheme"
            },
            "3": {
              "name": "variable.parameter.scheme"
            },
            "6": {
              "name": "punctuation.definition.variable.scheme"
            }
          }
        },
        {
          "name": "meta.declaration.variable.scheme",
          "begin": "(?\u003c=\\()(define)\\s([[:alnum:]][[:alnum:]!$%\u0026*+-./:\u003c=\u003e?@^_~]*)\\s*.*?",
          "end": "(?=\\))",
          "patterns": [
            {
              "include": "#comment"
            },
            {
              "include": "#sexp"
            },
            {
              "include": "#illegal"
            }
          ],
          "captures": {
            "1": {
              "name": "keyword.control.scheme"
            },
            "2": {
              "name": "variable.other.scheme"
            }
          }
        },
        {
          "include": "#quote-sexp"
        },
        {
          "include": "#quote"
        },
        {
          "include": "#language-functions"
        },
        {
          "include": "#string"
        },
        {
          "include": "#constants"
        },
        {
          "name": "constant.character.named.scheme",
          "match": "(?\u003c=[\\(\\s])(#\\\\)(space|newline|tab)(?=[\\s\\)])"
        },
        {
          "name": "constant.character.hex-literal.scheme",
          "match": "(?\u003c=[\\(\\s])(#\\\\)x[0-9A-F]{2,4}(?=[\\s\\)])"
        },
        {
          "name": "constant.character.escape.scheme",
          "match": "(?\u003c=[\\(\\s])(#\\\\).(?=[\\s\\)])"
        },
        {
          "name": "punctuation.separator.cons.scheme",
          "match": "(?\u003c=[ ()])\\.(?=[ ()])"
        },
        {
          "include": "#sexp"
        },
        {
          "include": "#illegal"
        }
      ],
      "beginCaptures": {
        "1": {
          "name": "punctuation.section.expression.begin.scheme"
        }
      },
      "endCaptures": {
        "1": {
          "name": "punctuation.section.expression.end.scheme"
        },
        "2": {
          "name": "meta.after-expression.scheme"
        }
      }
    },
    "string": {
      "name": "string.quoted.double.scheme",
      "begin": "(\")",
      "end": "(\")",
      "patterns": [
        {
          "name": "constant.character.escape.scheme",
          "match": "\\\\."
        }
      ],
      "beginCaptures": {
        "1": {
          "name": "punctuation.definition.string.begin.scheme"
        }
      },
      "endCaptures": {
        "1": {
          "name": "punctuation.definition.string.end.scheme"
        }
      }
    }
  }
}