shopping-parser 0.1.1

A Rust-based parser for parsing structured product information and shopping lists, supporting multiple currencies and units.
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55

// WHITESPACE - matches spaces or tabs.
WHITESPACE = { " " | "\t" }

// currency - represents supported currencies: "UAH", "USD", and "EUR".
currency = { "UAH" | "USD" | "EUR" }

// unit - defines supported measurement units: "kg", "l", "ml", "pcs", "g".
unit = { "kg" | "l" | "ml" | "pcs" | "g" }

// name - represents the name of a product, consisting of alphabetic characters and allowing multiple words separated by spaces.
name = { ASCII_ALPHA+ ~ (WHITESPACE+ ~ ASCII_ALPHA+)* }

// product_name - matches the product name in the format "Product name: <name>".
product_name = { ("Product name:" ~ WHITESPACE*)? ~ name }

// category - matches the product category in the format "Category: <category>".
category = { "Category:" ~ WHITESPACE* ~ ASCII_ALPHANUMERIC+ }

// price - matches the product price in the format "Price: <amount> <currency>/<unit>".
price = { "Price:" ~ WHITESPACE* ~ currency_amount ~ WHITESPACE* ~ currency ~ "/" ~ unit }

// calories - matches the calorie content in the format "Calories: <calories> cal".
calories = { "Calories:" ~ WHITESPACE* ~ ASCII_DIGIT+ ~ WHITESPACE* ~ "cal" }

// proteins - matches the protein content in grams in the format "Proteins: <amount> g".
proteins = { "Proteins:" ~ WHITESPACE* ~ ASCII_DIGIT+ ~ ("." ~ ASCII_DIGIT+)? ~ WHITESPACE* ~ "g" }

// carbohydrates - matches the carbohydrate content in grams in the format "Carbohydrates: <amount> g".
carbohydrates = { "Carbohydrates:" ~ WHITESPACE* ~ ASCII_DIGIT+ ~ ("." ~ ASCII_DIGIT+)? ~ WHITESPACE* ~ "g" }

// fats - matches the fat content in grams in the format "Fats: <amount> g".
fats = { "Fats:" ~ WHITESPACE* ~ ASCII_DIGIT+ ~ ("." ~ ASCII_DIGIT+)? ~ WHITESPACE* ~ "g" }

// currency_amount - represents a numeric value with an optional decimal part.
currency_amount = { ASCII_DIGIT+ ~ ("." ~ ASCII_DIGIT+)? }

// product - defines a complete product entry with all fields: name, category, price, calories, proteins, carbohydrates, fats.
product = {
    product_name ~ NEWLINE ~
    category ~ NEWLINE ~
    price ~ NEWLINE ~
    calories ~ NEWLINE ~
    proteins ~ NEWLINE ~
    carbohydrates ~ NEWLINE ~
    fats
}

// products - represents a list of products, where each product entry is separated by a blank line.
products = { product ~ (NEWLINE ~ NEWLINE ~ product)+ ~ NEWLINE* }

// shopping_item - represents a single item in the shopping list, following the format "<name> <quantity> <unit>".
shopping_item = { name ~ WHITESPACE+ ~ currency_amount ~ WHITESPACE+ ~ unit }

// shopping_list - represents a shopping list with multiple items, separated by commas.
shopping_list = { shopping_item ~ (WHITESPACE* ~ "," ~ WHITESPACE* ~ shopping_item)* }