147 lines
2.7 KiB
JavaScript
147 lines
2.7 KiB
JavaScript
class Juicescript {
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// TOKEN TYPES //
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static token_type = new Juicescript_helper_enum(
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// keywords
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"DEF", "GLOBAL", "END",
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// literals
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"IDENTIFIER", "VARIABLE", "FLAG", "STRING", "NUMBER",
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// language constants
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"TRUE", "FALSE",
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"NULL",
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// operators
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"NOT",
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"EQUAL_EQUAL", "NOT_EQUAL",
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"GREATER", "GREATER_EQUAL",
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"LESS", "LESS_EQUAL",
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// brackets
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"BRACKET_SQUARE_OPEN", "BRACKET_SQUARE_CLOSE",
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"BRACKET_CURLY_OPEN", "BRACKET_CURLY_CLOSE",
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// special chars
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"AMPERSAND", "QUESTION_MARK",
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// delimiters
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"DELIMITER",
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// meta stuff
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"EOF"
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);
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// ARGUMENT TYPES //
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static argument_type = new Juicescript_helper_enum(
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// parsable types
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"VARIABLE", "LITERAL", "OPERATOR", "IDENTIFIER",
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// meta types
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"VALUE"
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);
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// COMMAND FUNCTIONS //
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static command = {};
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/*
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CONSTRUCTOR: Return new juicescript parser with OPTIONS
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*/
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constructor(options){
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// STORE CALLBACKS //
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// save
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if(options.callback !== undefined){
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this.callback = options.callback;
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}
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// check if all have been set
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if(!(this.callback.stdout instanceof Function)){
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throw "invalid stdout callback";
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}
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if(!(this.callback.stderr instanceof Function)){
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throw "invalid stderr callback";
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}
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// GET IO ADAPTER //
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this.io = new Juicescript_io(this.callback);
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}
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/*
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Parse given PROGRAM-STRING and store syntax tree
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*/
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parse(program_string){
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// CLEAR OLD PROGRAM TREE //
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this.program_tree = null;
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// DO SCANNING //
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// get lexer
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let lexer = new Juicescript_lexer(program_string, {
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io: this.io
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});
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// run lexical analysis
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let token_list = lexer.scan();
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// stop here if unsuccessful
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if(lexer.error_count > 0) return false;
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// GET PROGRAM TREE FROM TOKENS //
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// get parser
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let parser = new Juicescript_parser(token_list, {
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io: this.io
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});
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// do parsing
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let program_tree = parser.parse();
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// stop here if unsuccessful
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if(parser.error_count > 0) return false;
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// FINISH UP //
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// store program tree
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this.program_tree = program_tree;
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// return success
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return true;
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}
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/*
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Run previously parsed program
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*/
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run(){
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// RUN //
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// get runner
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let runner = new Juicescript_runner(this.program_tree, {
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io: this.io
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});
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// run the program
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runner.run();
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}
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/*
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HELPER: Add command with expanded command aliases to command function list
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*/
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static command_add(command){
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for(var name_or_alias of command.alias.concat([command.name])){
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// MAKE SURE WE'RE NOT RE-DEFINING IT //
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if(Object.keys(Juicescript.command).includes(name_or_alias)){
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// throw error
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throw "cannot redefine command '" + name_or_alias + "'";
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}
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// ADD //
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Juicescript.command[name_or_alias] = command;
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}
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}
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}
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