{
    "$schema": "https://raw.githubusercontent.com/martinring/tmlanguage/master/tmlanguage.json",
    "name": "ligo",
    "patterns": [
        { "include": "#string" },
        { "include": "#single-quotes" },
        { "include": "#comment" },
        { "include": "#function" },
        { "include": "#binding" },
        { "include": "#type-annotation" },
        { "include": "#type-definition" },
        { "include": "#control-keywords" },
        { "include": "#other-keywords" },
        { "include": "#function-application" },
        { "include": "#identifiers" }
    ],
    "repository": {
        "function": {
            "begin": "\\b(recursive\\s+)?(function)\\s+([a-zA-Z_]\\w*)\\b",
            "beginCaptures": {
                "1": { "name": "keyword.other.recursive.ligo" },
                "2": { "name": "keyword.other.function.ligo" },
                "3": { "name": "entity.name.function" }
            },
            "end": "\\b(is)\\b",
            "endCaptures": {
                "1": { "name": "keyword.other.is.ligo"}
            },
            "patterns": [
                { "include": "#comment" },
                { "include": "#type-annotation" },
                { "include": "#binding" }
            ]
        },

        "binding": {
            "begin": "\\b(var|const)\\s+([a-zA-Z_]\\w*)\\b",
            "end": "([=),;]|:=)",
            "beginCaptures": {
                "1": { "name": "keyword.other.binding.ligo" },
                "2": { "name": "entity.name.variable"}
            },
            "endCaptures": {
                "1": { "name": "keyword.operator.eq.ligo"}
            },
            "patterns": [
                { "include": "#comment" },
                { "include": "#type-annotation" }
            ]
        },

        "type-annotation": {
            "begin": "(:)\\s*",
            "beginCaptures": {
                "1": { "name": "keyword.operator.type.ligo" }
            },
            "end": "(?:\\||(?=[;)=}\\]]|\\bis\\b|:=)|$)",
            "patterns": [
                { "include": "#comment" },
                { "include": "#type-expression" }
            ]
        },

        "type-expression": {
            "patterns": [
                {
                    "begin": "\\(",
                    "end": "\\)",
                    "patterns": [
                        { "include": "#comment" },
                        { "include": "#type-expression" }
                    ]
                },
                {
                    "match": "((?:(?!\\bis\\b|:=)[^=()|;}\\]])*)",
                    "captures": {
                        "1": { "name": "entity.name.type.ligo" }
                    }
                }
            ]
        },

        "type-definition": {
            "begin": "\\b(type)\\s+([a-zA-Z_]\\w*)\\s+(is)\\b",
            "beginCaptures": {
                "1": { "name": "keyword.other.typedef.ligo" },
                "2": { "name": "entity.name.type.ligo" },
                "3": { "name": "keyword.other.is.ligo" }
            },
            "end": "(?=\\b(?:function|type||const|var)\\b)",
            "patterns": [
                { "include": "#comment" },
                { "include": "#struct-type" },
                { "include": "#sum-type" }
            ]
        },

        "struct-type": {
            "begin": "\\b(record)\\s*\\[",
            "beginCaptures": {
                "1": { "name": "keyword.other.record.ligo" }
            },
            "end": "\\]",
            "patterns": [
                { "include": "#comment" },
                { "include": "#identifiers" },
                { "include": "#type-annotation" }
            ]
        },

        "sum-type": {
            "begin": "\\b([a-zA-Z_]\\w*)\\s+(of)",
            "beginCaptures": {
                "1": { "name": "entity.name.function.ligo" },
                "2": { "name": "keyword.other.of.ligo" }
            },
            "end": "(\\||\\blet\\b|\\btype\\b)",
            "patterns": [
                { "include": "#type-expression" }
            ]
        },

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

        "single-quotes" : {
            "name": "string.quoted.single.ligo",
            "begin": "\\'",
            "end": "\\'",
            "patterns" : []
        },


        "comment": {
            "patterns": [
                {
                    "name": "comment.line.double-slash.ligo",
                    "match": "(//.*)"
                },
                {
                    "name" : "comment.line.double-slash.ligo",
                    "begin" : "\\(\\*",
                    "end" : "\\*\\)",
                    "patterns" : []
                }
            ]
        },

        "list-cons": {
            "match": "::",
            "name": "keyword.operator.cons.ligo"
        },

        "control-keywords": {
            "name": "keyword.control.ligo",
            "match": "\\b(case|of|if|then|else|for|to|skip|assert|failwith)\\b"
        },

        "other-keywords": {
            "name": "keyword.other.ligo",
            "match": "\\b(block|with|begin|end|record)\\b"
        },

        "numeric-literals": {
            "name": "constant.numeric.ligo",
            "match": "\\b\\d+"
        },

        "operators": {
            "name": "keyword.operator.other.ligo",
            "match": "([-+*/])"
        },

        "function-application": {
            "match": "\\b([a-zA-Z_]\\w*)\\s+\\(",
            "captures": {
                "1": { "name": "entity.name.function" }
            }
        },

        "identifiers": {
            "match": "\\b([a-zA-Z_]\\w*)\\b",
            "captures": {
                "1": { "name": "entity.name.variable" }
            }
        }
    },
    "scopeName": "source.ligo"
}