{
    "fileTypes": [
        "vm"
    ],
    "name": "Virtual Machine Language",
    "patterns": [
        {
            "include": "#arithmetic-command"
        },
        {
            "include": "#memory-access-command"
        },
        {
            "include": "#program-flow-command"
        },
        {
            "include": "#function-calling-command"
        },
        {
            "include": "#comment"
        }
    ],
    "repository": {
        "arithmetic-command": {
            "patterns": [
                {
                    "comment": "Performs arithmetic and logical operations on the stack.",
                    "match": "\\b(add|sub|neg|eq|gt|lt|and|or|not|shiftleft|shiftright)\\b",
                    "name": "keyword.operator"
                }
            ]
        },
        "memory-access-command": {
            "patterns": [
                {
                    "comment": "Transfers data between the stack and virtual memory segments.",
                    "match": "\\b(push|pop)\\s+([^ \\/]*)\\s+(\\d+)\\b",
                    "name": "keyword.operator",
                    "captures": {
                        "2": {
                            "patterns": [
                                {
                                    "comment": "Segment",
                                    "match": "[a-zA-Z\\_\\.\\$\\:]+[a-zA-Z\\_\\.\\$\\:\\d]*",
                                    "name": "storage.type"
                                }
                            ]
                        },
                        "3": {
                            "patterns": [
                                {
                                    "comment": "Location",
                                    "match": "\\d+",
                                    "name": "constant.numeric"
                                }
                            ]
                        }
                    }
                }
            ]
        },
        "program-flow-command": {
            "patterns": [
                {
                    "comment": "Facilitates conditional and unconditional branching operations.",
                    "match": "\\b(label|goto|if-goto)\\s+([^ \\/]*)\\b",
                    "name": "keyword.control",
                    "captures": {
                        "2": {
                            "patterns": [
                                {
                                    "comment": "Label",
                                    "match": "[a-zA-Z\\_\\.\\$\\:]+[a-zA-Z\\_\\.\\$\\:\\d]*",
                                    "name": "entity.name.section"
                                }
                            ]
                        }
                    }
                }
            ]
        },
        "function-calling-command": {
            "patterns": [
                {
                    "comment": "Defines/calls functions.",
                    "match": "\\b(function|call)\\s+([^ \\/]*)\\s+(\\w+)\\b",
                    "name": "keyword.control",
                    "captures": {
                        "2": {
                            "patterns": [
                                {
                                    "comment": "Function name",
                                    "match": "[a-zA-Z\\_\\.\\$\\:]+[a-zA-Z\\_\\.\\$\\:\\d]*",
                                    "name": "entity.name.function"
                                }
                            ]
                        },
                        "3": {
                            "patterns": [
                                {
                                    "comment": "Number of local variables/arguments passed",
                                    "match": "\\d+",
                                    "name": "constant.numeric"
                                }
                            ]
                        }
                    }
                },
                {
                    "comment": "Returns from functions.",
                    "match": "return",
                    "name": "keyword.control"
                }
            ]
        },
        "comment": {
            "patterns": [
                {
                    "comment": "Inline comment",
                    "begin": "\\/\\/",
                    "end": "\\n",
                    "name": "comment.line.double-slash"
                },
                {
                    "comment": "Multiline comment",
                    "begin": "\\/\\*",
                    "end": "\\*\\/",
                    "name": "comment.block"
                }
            ]
        }
    },
    "scopeName": "source.vm"
}