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//===----------------------------------------------------------------------===//
//
// This source file is part of the Swift.org open source project
//
// Copyright (c) 2024 Apple Inc. and the Swift project authors
// Licensed under Apache License v2.0 with Runtime Library Exception
//
// See https://swift.org/LICENSE.txt for license information
// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
//
//===----------------------------------------------------------------------===//
import CompletionScoring
import Foundation
package struct SymbolGenerator: Sendable {
package static let shared = Self()
struct TermTable {
struct Entry: Codable {
var word: String
var count: Int
}
private var replicatedTerms: [String]
init() throws {
let entries = try JSONDecoder().decode(
[Entry].self,
from: loadTestResource(name: "CommonFunctionTerms", withExtension: "json")
)
let repeatedWords: [[String]] = entries.map { entry in
var word = entry.word
// Make the first letter lowercase if the word isn't something like 'URL'.
if word.count > 1 {
let first = entry.word.startIndex
let second = entry.word.index(after: first)
if word[first].isUppercase && !word[second].isUppercase {
let head = word[first].lowercased()
let tail = word.dropFirst(1)
word = head + tail
}
}
return Array(repeating: word, count: entry.count)
}
replicatedTerms = Array(repeatedWords.joined())
}
func randomTerm(using randomness: inout RepeatableRandomNumberGenerator) -> String {
replicatedTerms.randomElement(using: &randomness)!
}
}
let termTable = try! TermTable()
let segmentCountWeights = WeightedChoices([
(0.5, 1),
(0.375, 2),
(0.125, 3),
])
package func randomSegment(
using randomness: inout RepeatableRandomNumberGenerator,
capitalizeFirstTerm: Bool
) -> String {
let count = segmentCountWeights.select(using: &randomness)
return (0..<count).map { index in
let term = termTable.randomTerm(using: &randomness)
let capitalize = index > 0 || capitalizeFirstTerm
return capitalize ? term.capitalized : term
}.joined()
}
package func randomType(using randomness: inout RepeatableRandomNumberGenerator) -> String {
randomSegment(using: &randomness, capitalizeFirstTerm: true)
}
let argumentCountWeights = WeightedChoices([
(0.333, 0),
(0.333, 1),
(0.250, 2),
(0.083, 3),
])
package struct Function {
var baseName: String
var arguments: [Argument]
package var filterText: String {
let argPattern: String
if arguments.hasContent {
argPattern = arguments.map { argument in
(argument.label ?? "") + ":"
}.joined()
} else {
argPattern = ""
}
return baseName + "(" + argPattern + ")"
}
package var displayText: String {
let argPattern: String
if arguments.hasContent {
argPattern = arguments.map { argument in
(argument.label ?? "_") + ": " + argument.type
}.joined(separator: ", ")
} else {
argPattern = ""
}
return baseName + "(" + argPattern + ")"
}
}
struct Argument {
var label: String?
var type: String
}
let argumentLabeledWeights = WeightedChoices([
(31 / 32.0, true),
(01 / 32.0, false),
])
func randomArgument(using randomness: inout RepeatableRandomNumberGenerator) -> Argument {
let labeled = argumentLabeledWeights.select(using: &randomness)
let label = labeled ? randomSegment(using: &randomness, capitalizeFirstTerm: false) : nil
return Argument(label: label, type: randomType(using: &randomness))
}
package func randomFunction(using randomness: inout RepeatableRandomNumberGenerator) -> Function {
let argCount = argumentCountWeights.select(using: &randomness)
return Function(
baseName: randomSegment(using: &randomness, capitalizeFirstTerm: false),
arguments: Array(count: argCount) {
randomArgument(using: &randomness)
}
)
}
let initializerCounts = WeightedChoices<Int>([
(32 / 64.0, 1),
(16 / 64.0, 2),
(8 / 64.0, 3),
(4 / 64.0, 4),
(2 / 64.0, 5),
(1 / 64.0, 6),
(1 / 64.0, 0),
])
let initializerArgumentCounts = WeightedChoices<Int>([
(512 / 1024.0, 1),
(256 / 1024.0, 2),
(128 / 1024.0, 3),
(64 / 1024.0, 4),
(58 / 1024.0, 0),
(4 / 1024.0, 16),
(2 / 1024.0, 32),
])
package func randomInitializers(
typeName: String,
using randomness: inout RepeatableRandomNumberGenerator
) -> [Function] {
let initializerCount = initializerCounts.select(using: &randomness)
return Array(count: initializerCount) {
let argumentCount = initializerArgumentCounts.select(using: &randomness)
let arguments: [Argument] = Array(count: argumentCount) {
randomArgument(using: &randomness)
}
return Function(baseName: typeName, arguments: arguments)
}
}
let capitalizedPatternWeights = WeightedChoices([
(7 / 8.0, false),
(1 / 8.0, true),
])
package func randomPatternText(
lengthRange: Range<Int>,
using randomness: inout RepeatableRandomNumberGenerator
) -> String {
var text = ""
while text.count < lengthRange.upperBound {
text = randomSegment(
using: &randomness,
capitalizeFirstTerm: capitalizedPatternWeights.select(using: &randomness)
)
}
let length = lengthRange.randomElement(using: &randomness) ?? 0
return String(text.prefix(length))
}
func randomAPIs(
functionCount: Int,
typeCount: Int,
using randomness: inout RepeatableRandomNumberGenerator
) -> [String] {
let functions = (0..<functionCount).map { _ in randomFunction(using: &randomness) }
let types = (0..<typeCount).map { _ in randomType(using: &randomness) }
return functions.map(\.filterText) + types
}
}
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