first commit

select parser

Author: ciochetta

Diff for: README.md

@@ -1,2 +1,3 @@
 # lql-parser
+
 parser for my database project

Diff for: grammar/grammar.js

@@ -0,0 +1,39 @@
+// Generated automatically by nearley, version 2.20.1
+// https://github.com/Hardmath123/nearley
+(function () {
+function id(x) { return x[0]; }
+var grammar = {
+    Lexer: undefined,
+    ParserRules: [
+    {"name": "select_statement", "symbols": ["kw_select", {"literal":" "}, "select_what", {"literal":" "}, "kw_from", {"literal":" "}, "table_name"]},
+    {"name": "select_what", "symbols": [{"literal":"*"}]},
+    {"name": "select_what", "symbols": [{"literal":"["}, "select_what_option", {"literal":"]"}]},
+    {"name": "select_what", "symbols": ["column_name"]},
+    {"name": "select_what_option", "symbols": ["selection_array"]},
+    {"name": "select_what_option", "symbols": []},
+    {"name": "selection_array", "symbols": ["table_name"]},
+    {"name": "selection_array$string$1", "symbols": [{"literal":","}, {"literal":" "}], "postprocess": function joiner(d) {return d.join('');}},
+    {"name": "selection_array", "symbols": ["selection_array", "selection_array$string$1", "table_name"]},
+    {"name": "table_name", "symbols": ["string"]},
+    {"name": "column_name", "symbols": ["string"]},
+    {"name": "string$ebnf$1", "symbols": [/[a-zA-Z0-9]/]},
+    {"name": "string$ebnf$1", "symbols": ["string$ebnf$1", /[a-zA-Z0-9]/], "postprocess": function arrpush(d) {return d[0].concat([d[1]]);}},
+    {"name": "string", "symbols": ["string$ebnf$1"]},
+    {"name": "kw_from$string$1", "symbols": [{"literal":"f"}, {"literal":"r"}, {"literal":"o"}, {"literal":"m"}], "postprocess": function joiner(d) {return d.join('');}},
+    {"name": "kw_from", "symbols": ["kw_from$string$1"]},
+    {"name": "kw_from$string$2", "symbols": [{"literal":"F"}, {"literal":"R"}, {"literal":"O"}, {"literal":"M"}], "postprocess": function joiner(d) {return d.join('');}},
+    {"name": "kw_from", "symbols": ["kw_from$string$2"]},
+    {"name": "kw_select$string$1", "symbols": [{"literal":"S"}, {"literal":"E"}, {"literal":"L"}, {"literal":"E"}, {"literal":"C"}, {"literal":"T"}], "postprocess": function joiner(d) {return d.join('');}},
+    {"name": "kw_select", "symbols": ["kw_select$string$1"]},
+    {"name": "kw_select$string$2", "symbols": [{"literal":"s"}, {"literal":"e"}, {"literal":"l"}, {"literal":"e"}, {"literal":"c"}, {"literal":"t"}], "postprocess": function joiner(d) {return d.join('');}},
+    {"name": "kw_select", "symbols": ["kw_select$string$2"]},
+    {"name": "statement", "symbols": ["select_statement"]}
+]
+  , ParserStart: "statement"
+}
+if (typeof module !== 'undefined'&& typeof module.exports !== 'undefined') {
+   module.exports = grammar;
+} else {
+   window.grammar = grammar;
+}
+})();

Diff for: grammar/grammar.ne

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+@include "select.ne"
+
+statement -> select_statement

Diff for: grammar/select.js

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+// Generated automatically by nearley, version 2.20.1
+// https://github.com/Hardmath123/nearley
+(function () {
+function id(x) { return x[0]; }
+var grammar = {
+    Lexer: undefined,
+    ParserRules: [
+    {"name": "select_statement", "symbols": ["kw_select", {"literal":" "}, "select_what", {"literal":" "}, "kw_from", {"literal":" "}, "table_name"]},
+    {"name": "select_what", "symbols": [{"literal":"*"}]},
+    {"name": "select_what", "symbols": [{"literal":"["}, "select_what_option", {"literal":"]"}]},
+    {"name": "select_what", "symbols": ["column_name"]},
+    {"name": "select_what_option", "symbols": ["selection_array"]},
+    {"name": "select_what_option", "symbols": []},
+    {"name": "selection_array", "symbols": ["table_name"]},
+    {"name": "selection_array$string$1", "symbols": [{"literal":","}, {"literal":" "}], "postprocess": function joiner(d) {return d.join('');}},
+    {"name": "selection_array", "symbols": ["selection_array", "selection_array$string$1", "table_name"]},
+    {"name": "table_name", "symbols": ["string"], "postprocess": d => string},
+    {"name": "column_name", "symbols": ["string"], "postprocess": d => string},
+    {"name": "string$ebnf$1", "symbols": [/[a-zA-Z0-9]/]},
+    {"name": "string$ebnf$1", "symbols": ["string$ebnf$1", /[a-zA-Z0-9]/], "postprocess": function arrpush(d) {return d[0].concat([d[1]]);}},
+    {"name": "string", "symbols": ["string$ebnf$1"]},
+    {"name": "kw_from$subexpression$1", "symbols": [/[fF]/, /[rR]/, /[oO]/, /[mM]/], "postprocess": function(d) {return d.join(""); }},
+    {"name": "kw_from", "symbols": ["kw_from$subexpression$1"]},
+    {"name": "kw_select$subexpression$1", "symbols": [/[sS]/, /[eE]/, /[lL]/, /[eE]/, /[cC]/, /[tT]/], "postprocess": function(d) {return d.join(""); }},
+    {"name": "kw_select", "symbols": ["kw_select$subexpression$1"]}
+]
+  , ParserStart: "select_statement"
+}
+if (typeof module !== 'undefined'&& typeof module.exports !== 'undefined') {
+   module.exports = grammar;
+} else {
+   window.grammar = grammar;
+}
+})();

Diff for: grammar/select.ne

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+select_statement -> kw_select " " select_what " " kw_from " " table_name
+
+select_what -> "*"
+select_what -> "[" select_what_option "]"
+select_what -> column_name
+
+select_what_option -> selection_array
+select_what_option -> null
+
+selection_array -> table_name
+selection_array -> selection_array ", " table_name
+
+
+
+table_name -> string {% d => string %}
+
+column_name -> string {% d => string %}
+
+string ->  [a-zA-Z0-9]:+ 
+
+
+kw_from -> "from"i
+
+kw_select -> "select"i

Diff for: index.js

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+const nearley = require("nearley");
+const grammar = require("./grammar/grammar.js");
+const parser = new nearley.Parser(nearley.Grammar.fromCompiled(grammar));
+
+const parseInput = function (input) {
+	try {
+		parser.feed(input);
+
+		return parser;
+	} catch (error) {
+		console.log(error);
+
+		return error;
+	}
+};
+
+module.exports = {
+	parseInput,
+};