111 lines
3.5 KiB
Plaintext
111 lines
3.5 KiB
Plaintext
# This grammar is inspired by the "fancier grammar" tab of the nearley playground : https://omrelli.ug/nearley-playground
|
|
|
|
# Look for the PEMDAS system : Parentheses, Exponents (omitted here), Multiplication, and you should guess the rest :)
|
|
|
|
# This preprocessor was disabled because it doesn't work with Jest
|
|
# @preprocessor esmodule
|
|
|
|
@{%
|
|
const {string, filteredVariable, date, variable, variableWithConversion, binaryOperation, unaryOperation, boolean, number, numberWithUnit } = require('./grammarFunctions')
|
|
|
|
const moo = require("moo");
|
|
|
|
const dateRegexp = /(?:(?:0?[1-9]|[12][0-9]|3[01])\/)?(?:0?[1-9]|1[012])\/\d{4}/
|
|
const letter = '[a-zA-Z\u00C0-\u017F€$%]';
|
|
const letterOrNumber = '[a-zA-Z\u00C0-\u017F0-9\']';
|
|
const word = `${letter}(?:[\-']?${letterOrNumber}+)*`;
|
|
const wordOrNumber = `(?:${word}|${letterOrNumber}+)`
|
|
const words = `${word}(?:[\\s]?${wordOrNumber}+)*`
|
|
const numberRegExp = '-?(?:[1-9][0-9]+|[0-9])(?:\\.[0-9]+)?';
|
|
const lexer = moo.compile({
|
|
date: dateRegexp,
|
|
'(': '(',
|
|
')': ')',
|
|
'[': '[',
|
|
']': ']',
|
|
comparison: ['>','<','>=','<=','=','!='],
|
|
words: new RegExp(words),
|
|
number: new RegExp(numberRegExp),
|
|
string: /'[ \t\.'a-zA-Z\-\u00C0-\u017F0-9 ]+'/,
|
|
additionSubstraction: /[\+-]/,
|
|
multiplicationDivision: ['*','/'],
|
|
dot: ' . ',
|
|
'.': '.',
|
|
letterOrNumber: new RegExp(letterOrNumber),
|
|
space: { match: /[\s]+/, lineBreaks: true }
|
|
});
|
|
|
|
const join = (args) => ({value: (args.map(x => x && x.value).join(""))})
|
|
const flattenJoin = ([a, b]) => Array.isArray(b) ? join([a, ...b]) : a
|
|
%}
|
|
|
|
@lexer lexer
|
|
|
|
main ->
|
|
AdditionSubstraction {% id %}
|
|
| Comparison {% id %}
|
|
| NonNumericTerminal {% id %}
|
|
| Negation {% id %}
|
|
| Date {% id %}
|
|
|
|
NumericTerminal ->
|
|
Variable {% id %}
|
|
| VariableWithUnitConversion {% id %}
|
|
| FilteredVariable {% id %}
|
|
| number {% id %}
|
|
|
|
Negation ->
|
|
"-" %space Parentheses {% unaryOperation('calculation') %}
|
|
|
|
Parentheses ->
|
|
"(" AdditionSubstraction ")" {% ([,e]) => e %}
|
|
| "(" Negation ")" {% ([,e]) => e %}
|
|
| NumericTerminal {% id %}
|
|
|
|
Date ->
|
|
Variable {% id %}
|
|
| %date {% date %}
|
|
|
|
Comparison ->
|
|
Comparable %space %comparison %space Comparable {% binaryOperation('comparison')%}
|
|
| Date %space %comparison %space Date {% binaryOperation('comparison')%}
|
|
|
|
Comparable -> ( AdditionSubstraction | NonNumericTerminal) {% ([[e]]) => e %}
|
|
|
|
NonNumericTerminal ->
|
|
boolean {% id %}
|
|
| string {% id %}
|
|
|
|
Variable -> %words (%dot %words {% ([,words]) => words %}):* {% variable %}
|
|
|
|
UnitDenominator ->
|
|
(%space):? "/" %words {% join %}
|
|
UnitNumerator -> %words ("." %words):? {% flattenJoin %}
|
|
|
|
Unit -> UnitNumerator:? UnitDenominator:* {% flattenJoin %}
|
|
UnitConversion -> "[" Unit "]" {% ([,unit]) => unit %}
|
|
VariableWithUnitConversion ->
|
|
Variable %space UnitConversion {% variableWithConversion %}
|
|
# | FilteredVariable %space UnitConversion {% variableWithConversion %} TODO
|
|
|
|
Filter -> "." %words {% ([,filter]) => filter %}
|
|
FilteredVariable -> Variable %space Filter {% filteredVariable %}
|
|
|
|
AdditionSubstraction ->
|
|
AdditionSubstraction %space %additionSubstraction %space MultiplicationDivision {% binaryOperation('calculation') %}
|
|
| MultiplicationDivision {% id %}
|
|
|
|
MultiplicationDivision ->
|
|
MultiplicationDivision %space %multiplicationDivision %space Parentheses {% binaryOperation('calculation') %}
|
|
| Parentheses {% id %}
|
|
|
|
|
|
boolean ->
|
|
"oui" {% boolean(true) %}
|
|
| "non" {% boolean(false) %}
|
|
|
|
number ->
|
|
%number {% number %}
|
|
| %number (%space):? Unit {% numberWithUnit %}
|
|
|
|
string -> %string {% string %} |