Began writing a custom parser for calculations
This commit is contained in:
Stefan Zermatten
1
parser/.gitignore
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parser/.gitignore
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node_modules
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0
parser/grammar.html
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parser/grammar.html
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80
parser/grammar.js
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parser/grammar.js
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// Generated automatically by nearley, version 2.16.0
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// http://github.com/Hardmath123/nearley
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(function () {
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function id(x) { return x[0]; }
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const moo = require("moo");
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const lexer = moo.compile({
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number: /[0-9]+(?:\.[0-9]+)?/,
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name: {match: /[a-zA-Z]+\w*?/, type: moo.keywords({
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'keywords': ['if', 'else', 'd'],
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})},
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space: {match: /\s+/, lineBreaks: true},
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separators: [',', '.'],
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multiplicativeOperator: ['*', '/'],
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exponentOperator: ['^'],
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additiveOperator: ['+', '-'],
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unaryOperator: ['-'],
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andOperator: ['&', '&&'],
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orOperator: ['|', '||'],
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equalityOperator: ['=', '==', '===', '!=', '!=='],
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relationalOperator: ['>', '<', '>=', '<='],
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brackets: {match: ['(', ')', '{', '}'], value: () => null},
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});
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function nuller() { return null; }
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function operator([left, _1, op, _2, right]){
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return {type: 'operation', operator: op.value, left, right};
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}
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var grammar = {
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Lexer: lexer,
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ParserRules: [
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{"name": "ifStatement", "symbols": [{"literal":"if"}, "_", {"literal":"("}, "_", "callExpression", "_", {"literal":")"}, "_", "ifStatement", "_", {"literal":"else"}, "_", "ifStatement"], "postprocess": d => ({condition: d[4], true: d[8], false: d[12]})},
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{"name": "ifStatement", "symbols": ["callExpression"], "postprocess": id},
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{"name": "callExpression", "symbols": ["name", "_", "arguments"], "postprocess":
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d => ({type: "call", function: d[0], arguments: d[2]})
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},
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{"name": "callExpression", "symbols": ["expression"], "postprocess": id},
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{"name": "arguments$ebnf$1$subexpression$1", "symbols": ["expression"], "postprocess": d => d[0]},
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{"name": "arguments$ebnf$1", "symbols": ["arguments$ebnf$1$subexpression$1"], "postprocess": id},
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{"name": "arguments$ebnf$1", "symbols": [], "postprocess": function(d) {return null;}},
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{"name": "arguments$ebnf$2", "symbols": []},
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{"name": "arguments$ebnf$2$subexpression$1", "symbols": ["_", {"literal":","}, "_", "expression"], "postprocess": d => d[3]},
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{"name": "arguments$ebnf$2", "symbols": ["arguments$ebnf$2", "arguments$ebnf$2$subexpression$1"], "postprocess": function arrpush(d) {return d[0].concat([d[1]]);}},
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{"name": "arguments", "symbols": [{"literal":"("}, "_", "arguments$ebnf$1", "arguments$ebnf$2", "_", {"literal":")"}], "postprocess":
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d => [d[2], ...d[3]]
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},
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{"name": "expression", "symbols": ["equalityExpression"], "postprocess": id},
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{"name": "equalityExpression", "symbols": ["equalityExpression", "_", (lexer.has("equalityOperator") ? {type: "equalityOperator"} : equalityOperator), "_", "relationalExpression"], "postprocess": operator},
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{"name": "equalityExpression", "symbols": ["relationalExpression"], "postprocess": id},
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{"name": "relationalExpression", "symbols": ["relationalExpression", "_", (lexer.has("relationalOperator") ? {type: "relationalOperator"} : relationalOperator), "_", "additiveExpression"], "postprocess": operator},
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{"name": "relationalExpression", "symbols": ["additiveExpression"], "postprocess": id},
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{"name": "orExpression", "symbols": ["orExpression", "_", (lexer.has("orOperator") ? {type: "orOperator"} : orOperator), "_", "andExpression"], "postprocess": operator},
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{"name": "orExpression", "symbols": ["andExpression"], "postprocess": id},
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{"name": "andExpression", "symbols": ["andExpression", "_", (lexer.has("andOperator") ? {type: "andOperator"} : andOperator), "_", "equalityExpression"], "postprocess": operator},
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{"name": "andExpression", "symbols": ["equalityExpression"], "postprocess": id},
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{"name": "additiveExpression", "symbols": ["additiveExpression", "_", (lexer.has("additiveOperator") ? {type: "additiveOperator"} : additiveOperator), "_", "rollExpression"], "postprocess": operator},
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{"name": "additiveExpression", "symbols": ["rollExpression"], "postprocess": id},
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{"name": "rollExpression", "symbols": ["rollExpression", "_", {"literal":"d"}, "_", "multiplicativeExpression"], "postprocess": operator},
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{"name": "rollExpression", "symbols": ["multiplicativeExpression"], "postprocess": id},
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{"name": "multiplicativeExpression", "symbols": ["multiplicativeExpression", "_", (lexer.has("multiplicativeOperator") ? {type: "multiplicativeOperator"} : multiplicativeOperator), "_", "exponentExpression"], "postprocess": operator},
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{"name": "multiplicativeExpression", "symbols": ["exponentExpression"], "postprocess": id},
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{"name": "exponentExpression", "symbols": ["exponentExpression", "_", (lexer.has("exponentOperator") ? {type: "exponentOperator"} : exponentOperator), "_", "valueExpression"], "postprocess": operator},
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{"name": "exponentExpression", "symbols": ["valueExpression"], "postprocess": id},
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{"name": "valueExpression", "symbols": ["name"], "postprocess": id},
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{"name": "valueExpression", "symbols": ["number"], "postprocess": id},
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{"name": "number", "symbols": [(lexer.has("number") ? {type: "number"} : number)], "postprocess": d => d[0].value},
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{"name": "name", "symbols": [(lexer.has("name") ? {type: "name"} : name)], "postprocess": d => d[0].value},
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{"name": "_", "symbols": []},
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{"name": "_", "symbols": [(lexer.has("space") ? {type: "space"} : space)], "postprocess": nuller}
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]
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, ParserStart: "ifStatement"
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}
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if (typeof module !== 'undefined'&& typeof module.exports !== 'undefined') {
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module.exports = grammar;
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} else {
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window.grammar = grammar;
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}
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})();
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98
parser/grammar.ne
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98
parser/grammar.ne
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@{%
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const moo = require("moo");
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const lexer = moo.compile({
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number: /[0-9]+(?:\.[0-9]+)?/,
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name: {match: /[a-zA-Z]+\w*?/, type: moo.keywords({
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'keywords': ['if', 'else', 'd'],
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})},
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space: {match: /\s+/, lineBreaks: true},
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separators: [',', '.'],
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multiplicativeOperator: ['*', '/'],
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exponentOperator: ['^'],
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additiveOperator: ['+', '-'],
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unaryOperator: ['-'],
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andOperator: ['&', '&&'],
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orOperator: ['|', '||'],
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equalityOperator: ['=', '==', '===', '!=', '!=='],
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relationalOperator: ['>', '<', '>=', '<='],
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brackets: {match: ['(', ')', '{', '}'], value: () => null},
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});
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%}
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@{% function nuller() { return null; } %}
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@{%
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function operator([left, _1, op, _2, right]){
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return {type: 'operation', operator: op.value, left, right};
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}
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%}
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# Use the Moo lexer
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@lexer lexer
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ifStatement ->
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"if" _ "(" _ callExpression _ ")" _ ifStatement _ "else" _ ifStatement {% d => ({condition: d[4], true: d[8], false: d[12]}) %}
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| callExpression {% id %}
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callExpression ->
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name _ arguments
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{%
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d => ({type: "call", function: d[0], arguments: d[2]})
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%}
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| expression {% id %}
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arguments ->
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"(" _ (expression {% d => d[0] %}):? ( _ "," _ expression {% d => d[3] %} ):* _ ")"
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{%
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d => [d[2], ...d[3]]
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%}
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expression -> equalityExpression {% id %}
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equalityExpression ->
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equalityExpression _ %equalityOperator _ relationalExpression {%operator%}
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| relationalExpression {% id %}
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relationalExpression ->
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relationalExpression _ %relationalOperator _ additiveExpression {%operator%}
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| additiveExpression {% id %}
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orExpression ->
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orExpression _ %orOperator _ andExpression {%operator%}
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| andExpression {% id %}
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andExpression ->
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andExpression _ %andOperator _ equalityExpression {%operator%}
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| equalityExpression {% id %}
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additiveExpression ->
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additiveExpression _ %additiveOperator _ rollExpression {%operator%}
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| rollExpression {% id %}
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rollExpression ->
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rollExpression _ "d" _ multiplicativeExpression {% operator %}
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| multiplicativeExpression {% id %}
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multiplicativeExpression ->
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multiplicativeExpression _ %multiplicativeOperator _ exponentExpression {%operator%}
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| exponentExpression {% id %}
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exponentExpression ->
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exponentExpression _ %exponentOperator _ valueExpression {%operator%}
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| valueExpression {% id %}
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valueExpression ->
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name {% id %}
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| number {% id %}
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# A number or a function of a number
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number ->
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%number {% d => d[0].value %}
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name ->
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%name {% d => d[0].value %}
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_ ->
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null
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| %space {% nuller %}
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75
parser/package-lock.json
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75
parser/package-lock.json
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{
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"name": "dicecloud-parser",
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"version": "0.1.0",
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"lockfileVersion": 1,
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"requires": true,
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"dependencies": {
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"commander": {
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"version": "2.19.0",
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"resolved": "https://registry.npmjs.org/commander/-/commander-2.19.0.tgz",
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"integrity": "sha512-6tvAOO+D6OENvRAh524Dh9jcfKTYDQAqvqezbCW82xj5X0pSrcpxtvRKHLG0yBY6SD7PSDrJaj+0AiOcKVd1Xg==",
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"dev": true
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},
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"discontinuous-range": {
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"version": "1.0.0",
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"resolved": "https://registry.npmjs.org/discontinuous-range/-/discontinuous-range-1.0.0.tgz",
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"integrity": "sha1-44Mx8IRLukm5qctxx3FYWqsbxlo=",
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"dev": true
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},
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"moo": {
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"version": "0.5.0",
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"resolved": "https://registry.npmjs.org/moo/-/moo-0.5.0.tgz",
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"integrity": "sha512-AMv6iqhTEd5vT/cQlH6cammKS5ekyHhyqTRKi5zKMWl1RTyFnQ3ohPSBNSm8ySe2wlxSKwDonr9D5ZT44mdO3g==",
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"dev": true
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},
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"nearley": {
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"version": "2.16.0",
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"resolved": "https://registry.npmjs.org/nearley/-/nearley-2.16.0.tgz",
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"integrity": "sha512-Tr9XD3Vt/EujXbZBv6UAHYoLUSMQAxSsTnm9K3koXzjzNWY195NqALeyrzLZBKzAkL3gl92BcSogqrHjD8QuUg==",
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"dev": true,
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"requires": {
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"commander": "2.19.0",
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"moo": "0.4.3",
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"railroad-diagrams": "1.0.0",
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"randexp": "0.4.6",
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"semver": "5.6.0"
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},
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"dependencies": {
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"moo": {
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"version": "0.4.3",
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"resolved": "https://registry.npmjs.org/moo/-/moo-0.4.3.tgz",
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"integrity": "sha512-gFD2xGCl8YFgGHsqJ9NKRVdwlioeW3mI1iqfLNYQOv0+6JRwG58Zk9DIGQgyIaffSYaO1xsKnMaYzzNr1KyIAw==",
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"dev": true
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}
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}
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},
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"railroad-diagrams": {
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"version": "1.0.0",
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"resolved": "https://registry.npmjs.org/railroad-diagrams/-/railroad-diagrams-1.0.0.tgz",
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"integrity": "sha1-635iZ1SN3t+4mcG5Dlc3RVnN234=",
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"dev": true
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},
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"randexp": {
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"version": "0.4.6",
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"resolved": "https://registry.npmjs.org/randexp/-/randexp-0.4.6.tgz",
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"integrity": "sha512-80WNmd9DA0tmZrw9qQa62GPPWfuXJknrmVmLcxvq4uZBdYqb1wYoKTmnlGUchvVWe0XiLupYkBoXVOxz3C8DYQ==",
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"dev": true,
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"requires": {
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"discontinuous-range": "1.0.0",
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"ret": "0.1.15"
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}
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},
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"ret": {
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"version": "0.1.15",
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"resolved": "https://registry.npmjs.org/ret/-/ret-0.1.15.tgz",
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"integrity": "sha512-TTlYpa+OL+vMMNG24xSlQGEJ3B/RzEfUlLct7b5G/ytav+wPrplCpVMFuwzXbkecJrb6IYo1iFb0S9v37754mg==",
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"dev": true
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},
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"semver": {
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"version": "5.6.0",
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"resolved": "https://registry.npmjs.org/semver/-/semver-5.6.0.tgz",
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|
"integrity": "sha512-RS9R6R35NYgQn++fkDWaOmqGoj4Ek9gGs+DPxNUZKuwE183xjJroKvyo1IzVFeXvUrvmALy6FWD5xrdJT25gMg==",
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"dev": true
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|
}
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|
}
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}
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14
parser/package.json
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14
parser/package.json
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{
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"name": "dicecloud-parser",
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"version": "0.1.0",
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"scripts": {
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"build": "nearleyc grammar.ne -o grammar.js",
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"test": "nearley-test grammar.js",
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"unparse": "nearley-unparse grammar.js"
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},
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"author": "Stefan Zermatten",
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"devDependencies": {
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"moo": "^0.5.0",
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"nearley": "^2.16.0"
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}
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}
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Reference in New Issue
Block a user