{
  "name": "perga",
  "rules": {
    "program": {
      "type": "REPEAT",
      "content": {
        "type": "CHOICE",
        "members": [
          {
            "type": "SYMBOL",
            "name": "definition"
          },
          {
            "type": "SYMBOL",
            "name": "preprocess"
          },
          {
            "type": "SYMBOL",
            "name": "axiom"
          }
        ]
      }
    },
    "identifier": {
      "type": "PATTERN",
      "value": "[a-zA-Z_]\\w*"
    },
    "comment": {
      "type": "TOKEN",
      "content": {
        "type": "SEQ",
        "members": [
          {
            "type": "STRING",
            "value": "--"
          },
          {
            "type": "PATTERN",
            "value": ".*"
          }
        ]
      }
    },
    "param_block": {
      "type": "SEQ",
      "members": [
        {
          "type": "STRING",
          "value": "("
        },
        {
          "type": "FIELD",
          "name": "param",
          "content": {
            "type": "REPEAT1",
            "content": {
              "type": "SYMBOL",
              "name": "identifier"
            }
          }
        },
        {
          "type": "STRING",
          "value": ":"
        },
        {
          "type": "FIELD",
          "name": "type",
          "content": {
            "type": "SYMBOL",
            "name": "expr"
          }
        },
        {
          "type": "STRING",
          "value": ")"
        }
      ]
    },
    "star": {
      "type": "STRING",
      "value": "*"
    },
    "square": {
      "type": "CHOICE",
      "members": [
        {
          "type": "STRING",
          "value": "□"
        },
        {
          "type": "STRING",
          "value": "[]"
        }
      ]
    },
    "labs": {
      "type": "SEQ",
      "members": [
        {
          "type": "CHOICE",
          "members": [
            {
              "type": "STRING",
              "value": "λ"
            },
            {
              "type": "STRING",
              "value": "fun"
            }
          ]
        },
        {
          "type": "REPEAT1",
          "content": {
            "type": "SYMBOL",
            "name": "param_block"
          }
        },
        {
          "type": "CHOICE",
          "members": [
            {
              "type": "STRING",
              "value": "=>"
            },
            {
              "type": "STRING",
              "value": "⇒"
            }
          ]
        },
        {
          "type": "SYMBOL",
          "name": "expr"
        }
      ]
    },
    "pabs": {
      "type": "SEQ",
      "members": [
        {
          "type": "CHOICE",
          "members": [
            {
              "type": "STRING",
              "value": "∏"
            },
            {
              "type": "STRING",
              "value": "forall"
            }
          ]
        },
        {
          "type": "REPEAT1",
          "content": {
            "type": "SYMBOL",
            "name": "param_block"
          }
        },
        {
          "type": "STRING",
          "value": ","
        },
        {
          "type": "SYMBOL",
          "name": "expr"
        }
      ]
    },
    "term": {
      "type": "CHOICE",
      "members": [
        {
          "type": "SYMBOL",
          "name": "identifier"
        },
        {
          "type": "SYMBOL",
          "name": "star"
        },
        {
          "type": "SYMBOL",
          "name": "square"
        },
        {
          "type": "SEQ",
          "members": [
            {
              "type": "STRING",
              "value": "("
            },
            {
              "type": "SYMBOL",
              "name": "expr"
            },
            {
              "type": "STRING",
              "value": ")"
            }
          ]
        }
      ]
    },
    "binding": {
      "type": "SEQ",
      "members": [
        {
          "type": "STRING",
          "value": "("
        },
        {
          "type": "SYMBOL",
          "name": "identifier"
        },
        {
          "type": "REPEAT",
          "content": {
            "type": "SYMBOL",
            "name": "param_block"
          }
        },
        {
          "type": "CHOICE",
          "members": [
            {
              "type": "SYMBOL",
              "name": "ascription"
            },
            {
              "type": "BLANK"
            }
          ]
        },
        {
          "type": "STRING",
          "value": ":="
        },
        {
          "type": "SYMBOL",
          "name": "expr"
        },
        {
          "type": "STRING",
          "value": ")"
        }
      ]
    },
    "let": {
      "type": "SEQ",
      "members": [
        {
          "type": "STRING",
          "value": "let"
        },
        {
          "type": "REPEAT1",
          "content": {
            "type": "SYMBOL",
            "name": "binding"
          }
        },
        {
          "type": "STRING",
          "value": "in"
        },
        {
          "type": "SYMBOL",
          "name": "expr"
        },
        {
          "type": "STRING",
          "value": "end"
        }
      ]
    },
    "app": {
      "type": "REPEAT1",
      "content": {
        "type": "SYMBOL",
        "name": "term"
      }
    },
    "axiom": {
      "type": "SEQ",
      "members": [
        {
          "type": "STRING",
          "value": "axiom"
        },
        {
          "type": "FIELD",
          "name": "name",
          "content": {
            "type": "SYMBOL",
            "name": "identifier"
          }
        },
        {
          "type": "REPEAT",
          "content": {
            "type": "SYMBOL",
            "name": "param_block"
          }
        },
        {
          "type": "SYMBOL",
          "name": "ascription"
        },
        {
          "type": "STRING",
          "value": ";"
        }
      ]
    },
    "arrow": {
      "type": "PREC_LEFT",
      "value": 1,
      "content": {
        "type": "SEQ",
        "members": [
          {
            "type": "SYMBOL",
            "name": "app_term"
          },
          {
            "type": "CHOICE",
            "members": [
              {
                "type": "STRING",
                "value": "->"
              },
              {
                "type": "STRING",
                "value": "→"
              }
            ]
          },
          {
            "type": "SYMBOL",
            "name": "expr"
          }
        ]
      }
    },
    "app_term": {
      "type": "CHOICE",
      "members": [
        {
          "type": "SYMBOL",
          "name": "labs"
        },
        {
          "type": "SYMBOL",
          "name": "pabs"
        },
        {
          "type": "SYMBOL",
          "name": "let"
        },
        {
          "type": "SYMBOL",
          "name": "app"
        }
      ]
    },
    "expr": {
      "type": "CHOICE",
      "members": [
        {
          "type": "SYMBOL",
          "name": "app_term"
        },
        {
          "type": "SYMBOL",
          "name": "arrow"
        }
      ]
    },
    "ascription": {
      "type": "SEQ",
      "members": [
        {
          "type": "STRING",
          "value": ":"
        },
        {
          "type": "FIELD",
          "name": "type",
          "content": {
            "type": "SYMBOL",
            "name": "expr"
          }
        }
      ]
    },
    "definition": {
      "type": "SEQ",
      "members": [
        {
          "type": "STRING",
          "value": "def"
        },
        {
          "type": "FIELD",
          "name": "name",
          "content": {
            "type": "SYMBOL",
            "name": "identifier"
          }
        },
        {
          "type": "REPEAT",
          "content": {
            "type": "SYMBOL",
            "name": "param_block"
          }
        },
        {
          "type": "CHOICE",
          "members": [
            {
              "type": "SYMBOL",
              "name": "ascription"
            },
            {
              "type": "BLANK"
            }
          ]
        },
        {
          "type": "STRING",
          "value": ":="
        },
        {
          "type": "CHOICE",
          "members": [
            {
              "type": "SYMBOL",
              "name": "expr"
            }
          ]
        },
        {
          "type": "STRING",
          "value": ";"
        }
      ]
    },
    "preprocess": {
      "type": "SEQ",
      "members": [
        {
          "type": "SYMBOL",
          "name": "command"
        },
        {
          "type": "SYMBOL",
          "name": "post_command"
        }
      ]
    },
    "post_command": {
      "type": "PATTERN",
      "value": ".+"
    },
    "command": {
      "type": "STRING",
      "value": "@include"
    }
  },
  "extras": [
    {
      "type": "SYMBOL",
      "name": "comment"
    },
    {
      "type": "PATTERN",
      "value": "\\s"
    }
  ],
  "conflicts": [],
  "precedences": [],
  "externals": [],
  "inline": [],
  "supertypes": []
}