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52b2aee6ea
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 fenris
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52b2aee6ea | ||
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fenris
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d2395d897e |
16
readme.md
16
readme.md
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@ -54,25 +54,13 @@ record<
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where:
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- `version` should be `"2"`
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- `parser_start` is one of the parser rule `label` values.
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- `lexer_rules.*.type` is one of `ignore`, `void`, `boolean`, `int`, `float`, `string` (see section _Lexer rule types_)
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- `lexer_rules.*.pass` controls, whether the read sequence shall be incorporated or not
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- `parser_rules.*.conclusion.*.type` is one of `terminal`, `variable` (see section _Conclusion element types_)
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- `parser_start` is one of the parser rule `label` values
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The recommended extension for such files is `.tp2.json`.
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### Lexer rule types
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| type | meaning | parameters |
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|-- |-- |-- |
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| `ignore` | disregard matching strings | `pattern` |
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| `void` | do not assign a value to matching strings | `pattern`, `id` |
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| `boolean` | interpret matching strings as boolean values | `pattern`, `id`, `value` |
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| `int` | interpret matching strings as integer number values | `pattern`, `id` |
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| `float` | interpret matching strings as floating point number values | `pattern`, `id` |
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| `string` | interpret matching strings as string values | `pattern`, `id` |
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### Conclusion element types
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| type | meaning | parameters |
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@ -21,13 +21,20 @@ along with »type2«. If not, see <http://www.gnu.org/licenses/>.
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/**
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* @author fenris
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*/
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type type_resulttree = lib_plankton.lang.type_tree<lib_plankton.lang.type_terminal_default>;
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type type_resulttree = lib_plankton.lang.type_tree<
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lib_plankton.lang.type_terminal_default
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>;
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/**
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* @author fenris
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*/
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type type_myreader = lib_plankton.lang.class_reader<char, lib_plankton.lang.type_terminal_default, string, type_resulttree>;
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type type_myreader = lib_plankton.lang.class_reader<
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char,
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lib_plankton.lang.type_terminal_default,
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string,
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type_resulttree
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>;
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/**
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@ -51,46 +58,52 @@ async function main(
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args_raw : Array<string>
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) : Promise<void>
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{
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const args_handler : lib_args.class_handler = new lib_args.class_handler({
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"path": lib_args.class_argument.positional({
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"index": 0,
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"type": lib_args.enum_type.string,
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"mode": lib_args.enum_mode.replace,
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"info": "the path to the grammar file",
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"name": "path",
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}),
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"verbosity": lib_args.class_argument.volatile({
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"indicators_short": ["v"],
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"indicators_long": ["verbosity"],
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"type": lib_args.enum_type.integer,
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"mode": lib_args.enum_mode.replace,
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"default": 1,
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"info": "verbosity level",
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"name": "verbosity",
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}),
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"help": lib_args.class_argument.volatile({
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"indicators_short": ["h"],
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"indicators_long": ["help"],
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"type": lib_args.enum_type.boolean,
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"mode": lib_args.enum_mode.replace,
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"default": false,
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"info": "show help and exit",
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"name": "help",
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}),
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});
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const args_handler : lib_args.class_handler = new lib_args.class_handler(
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{
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"path": lib_args.class_argument.positional({
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"index": 0,
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"type": lib_args.enum_type.string,
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"mode": lib_args.enum_mode.replace,
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"info": "the path to the grammar file",
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"name": "path",
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}),
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"verbosity": lib_args.class_argument.volatile({
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"indicators_short": ["v"],
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"indicators_long": ["verbosity"],
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"type": lib_args.enum_type.integer,
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"mode": lib_args.enum_mode.replace,
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"default": 1,
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"info": "verbosity level",
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"name": "verbosity",
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}),
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"help": lib_args.class_argument.volatile({
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"indicators_short": ["h"],
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"indicators_long": ["help"],
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"type": lib_args.enum_type.boolean,
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"mode": lib_args.enum_mode.replace,
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"default": false,
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"info": "show help and exit",
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"name": "help",
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}),
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}
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);
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const args : Record<string, any> = args_handler.read(lib_args.enum_environment.cli, args_raw.join(" "));
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if (args["help"]) {
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if (args["help"])
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{
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process.stdout.write(
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args_handler.generate_help({
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"programname": "type2",
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"description": "reads a string from stdin and parses it according to a given grammar to an abstract syntax tree as JSON",
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"author": "kcf <fenris@folksprak.org>",
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"executable": "type2",
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})
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args_handler.generate_help(
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{
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"programname": "type2",
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"description": "reads a string from stdin and parses it according to a given grammar to an abstract syntax tree as JSON",
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"author": "kcf <fenris@folksprak.org>",
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"executable": "type2",
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}
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)
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);
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return Promise.resolve<void>(undefined);
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}
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else {
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else
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{
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lib_plankton.log.conf_push(
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(args["verbosity"] <= 0)
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? []
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@ -112,10 +125,12 @@ async function main(
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const reader : type_myreader = await generate_reader(args["path"]);
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const input_raw : string = await lib_plankton.file.read_stdin();
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const result : type_resulttree = reader.run(input_raw.split(""));
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if (result === null) {
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if (result === null)
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{
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return Promise.reject<void>(new Error("reading failed"));
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}
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else {
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else
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{
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process.stdout.write(JSON.stringify(result, undefined, "\t") + "\n");
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return Promise.resolve<void>(undefined);
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}
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