Ilya Gorbunov
7e2c365b79
Refactor operator documentation generation for primitives and unsigned types so that it is easier to specialize it. Manually sync docs of numeric types in js-ir stdlib. KT-26234
544 lines
24 KiB
Kotlin
544 lines
24 KiB
Kotlin
/*
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* Copyright 2010-2021 JetBrains s.r.o. and Kotlin Programming Language contributors.
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* Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
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*/
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package org.jetbrains.kotlin.generators.builtins.numbers
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import org.jetbrains.kotlin.generators.builtins.PrimitiveType
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import org.jetbrains.kotlin.generators.builtins.convert
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import org.jetbrains.kotlin.generators.builtins.generateBuiltIns.BuiltInsSourceGenerator
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import org.jetbrains.kotlin.generators.builtins.printDoc
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import java.io.PrintWriter
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class GeneratePrimitives(out: PrintWriter) : BuiltInsSourceGenerator(out) {
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companion object {
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internal val binaryOperators: List<String> = listOf(
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"plus",
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"minus",
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"times",
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"div",
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"rem",
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)
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internal val unaryOperators: Map<String, String> = mapOf(
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"inc" to "Increments this value.",
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"dec" to "Decrements this value.",
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"unaryPlus" to "Returns this value.",
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"unaryMinus" to "Returns the negative of this value.")
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internal val shiftOperators: Map<String, String> = mapOf(
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"shl" to "Shifts this value left by the [bitCount] number of bits.",
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"shr" to "Shifts this value right by the [bitCount] number of bits, filling the leftmost bits with copies of the sign bit.",
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"ushr" to "Shifts this value right by the [bitCount] number of bits, filling the leftmost bits with zeros.")
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internal val bitwiseOperators: Map<String, String> = mapOf(
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"and" to "Performs a bitwise AND operation between the two values.",
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"or" to "Performs a bitwise OR operation between the two values.",
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"xor" to "Performs a bitwise XOR operation between the two values.")
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internal fun shiftOperatorsDocDetail(kind: PrimitiveType): String {
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val bitsUsed = when (kind) {
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PrimitiveType.INT -> "five"
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PrimitiveType.LONG -> "six"
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else -> throw IllegalArgumentException("Bit shift operation is not implemented for $kind")
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}
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return """
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* Note that only the $bitsUsed lowest-order bits of the [bitCount] are used as the shift distance.
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* The shift distance actually used is therefore always in the range `0..${kind.bitSize - 1}`.
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"""
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}
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internal fun binaryOperatorDoc(operator: String, operand1: PrimitiveType, operand2: PrimitiveType): String = when (operator) {
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"plus" -> "Adds the other value to this value."
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"minus" -> "Subtracts the other value from this value."
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"times" -> "Multiplies this value by the other value."
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"div" -> {
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if (operand1.isIntegral && operand2.isIntegral)
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"Divides this value by the other value, truncating the result to an integer that is closer to zero."
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else
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"Divides this value by the other value."
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}
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"floorDiv" ->
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"Divides this value by the other value, flooring the result to an integer that is closer to negative infinity."
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"rem" -> {
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"""
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Calculates the remainder of truncating division of this value by the other value.
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The result is either zero or has the same sign as the _dividend_ and has the absolute value less than the absolute value of the divisor.
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""".trimIndent()
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}
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"mod" -> {
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"""
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Calculates the remainder of flooring division of this value by the other value.
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The result is either zero or has the same sign as the _divisor_ and has the absolute value less than the absolute value of the divisor.
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""".trimIndent() + if (operand1.isFloatingPoint)
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"\n\n" + "If the result cannot be represented exactly, it is rounded to the nearest representable number. In this case the absolute value of the result can be less than or _equal to_ the absolute value of the divisor."
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else ""
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}
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else -> error("No documentation for operator $operator")
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}
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}
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private val typeDescriptions: Map<PrimitiveType, String> = mapOf(
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PrimitiveType.DOUBLE to "double-precision 64-bit IEEE 754 floating point number",
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PrimitiveType.FLOAT to "single-precision 32-bit IEEE 754 floating point number",
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PrimitiveType.LONG to "64-bit signed integer",
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PrimitiveType.INT to "32-bit signed integer",
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PrimitiveType.SHORT to "16-bit signed integer",
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PrimitiveType.BYTE to "8-bit signed integer",
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PrimitiveType.CHAR to "16-bit Unicode character"
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)
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private fun primitiveConstants(type: PrimitiveType): List<Any> = when (type) {
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PrimitiveType.INT -> listOf(java.lang.Integer.MIN_VALUE, java.lang.Integer.MAX_VALUE)
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PrimitiveType.BYTE -> listOf(java.lang.Byte.MIN_VALUE, java.lang.Byte.MAX_VALUE)
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PrimitiveType.SHORT -> listOf(java.lang.Short.MIN_VALUE, java.lang.Short.MAX_VALUE)
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PrimitiveType.LONG -> listOf((java.lang.Long.MIN_VALUE + 1).toString() + "L - 1L", java.lang.Long.MAX_VALUE.toString() + "L")
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PrimitiveType.DOUBLE -> listOf(java.lang.Double.MIN_VALUE, java.lang.Double.MAX_VALUE, "1.0/0.0", "-1.0/0.0", "-(0.0/0.0)")
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PrimitiveType.FLOAT -> listOf(java.lang.Float.MIN_VALUE, java.lang.Float.MAX_VALUE, "1.0F/0.0F", "-1.0F/0.0F", "-(0.0F/0.0F)").map { it as? String ?: "${it}F" }
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else -> throw IllegalArgumentException("type: $type")
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}
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override fun generateBody() {
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for (kind in PrimitiveType.onlyNumeric) {
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val className = kind.capitalized
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generateDoc(kind)
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out.println("public class $className private constructor() : Number(), Comparable<$className> {")
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out.print(" companion object {")
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if (kind == PrimitiveType.FLOAT || kind == PrimitiveType.DOUBLE) {
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val (minValue, maxValue, posInf, negInf, nan) = primitiveConstants(kind)
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out.println("""
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/**
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* A constant holding the smallest *positive* nonzero value of $className.
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*/
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public const val MIN_VALUE: $className = $minValue
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/**
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* A constant holding the largest positive finite value of $className.
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*/
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public const val MAX_VALUE: $className = $maxValue
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/**
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* A constant holding the positive infinity value of $className.
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*/
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public const val POSITIVE_INFINITY: $className = $posInf
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/**
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* A constant holding the negative infinity value of $className.
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*/
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public const val NEGATIVE_INFINITY: $className = $negInf
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/**
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* A constant holding the "not a number" value of $className.
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*/
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public const val NaN: $className = $nan""")
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}
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if (kind == PrimitiveType.INT || kind == PrimitiveType.LONG || kind == PrimitiveType.SHORT || kind == PrimitiveType.BYTE) {
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val (minValue, maxValue) = primitiveConstants(kind)
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out.println("""
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/**
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* A constant holding the minimum value an instance of $className can have.
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*/
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public const val MIN_VALUE: $className = $minValue
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/**
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* A constant holding the maximum value an instance of $className can have.
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*/
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public const val MAX_VALUE: $className = $maxValue""")
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}
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if (kind.isIntegral || kind.isFloatingPoint) {
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val sizeSince = if (kind.isFloatingPoint) "1.4" else "1.3"
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out.println("""
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/**
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* The number of bytes used to represent an instance of $className in a binary form.
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*/
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@SinceKotlin("$sizeSince")
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public const val SIZE_BYTES: Int = ${kind.byteSize}
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/**
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* The number of bits used to represent an instance of $className in a binary form.
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*/
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@SinceKotlin("$sizeSince")
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public const val SIZE_BITS: Int = ${kind.bitSize}""")
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}
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out.println(""" }""")
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generateCompareTo(kind)
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generateBinaryOperators(kind)
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generateUnaryOperators(kind)
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generateRangeTo(kind)
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if (kind == PrimitiveType.INT || kind == PrimitiveType.LONG) {
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generateBitShiftOperators(kind)
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}
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if (kind == PrimitiveType.INT || kind == PrimitiveType.LONG /* || kind == PrimitiveType.BYTE || kind == PrimitiveType.SHORT */) {
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generateBitwiseOperators(className, since = if (kind == PrimitiveType.BYTE || kind == PrimitiveType.SHORT) "1.1" else null)
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}
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generateConversions(kind)
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out.println("}\n")
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}
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}
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private fun generateDoc(kind: PrimitiveType) {
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out.println("/**")
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out.println(" * Represents a ${typeDescriptions[kind]}.")
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out.println(" * On the JVM, non-nullable values of this type are represented as values of the primitive type `${kind.name.toLowerCase()}`.")
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out.println(" */")
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}
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private fun generateCompareTo(thisKind: PrimitiveType) {
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for (otherKind in PrimitiveType.onlyNumeric) {
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out.println("""
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/**
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* Compares this value with the specified value for order.
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* Returns zero if this value is equal to the specified other value, a negative number if it's less than other,
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* or a positive number if it's greater than other.
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*/""")
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out.print(" public ")
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if (otherKind == thisKind) out.print("override ")
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out.println("operator fun compareTo(other: ${otherKind.capitalized}): Int")
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}
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out.println()
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}
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private fun generateBinaryOperators(thisKind: PrimitiveType) {
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for (name in binaryOperators) {
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generateOperator(name, thisKind)
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}
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}
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private fun generateOperator(name: String, thisKind: PrimitiveType) {
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for (otherKind in PrimitiveType.onlyNumeric) {
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val returnType = getOperatorReturnType(thisKind, otherKind)
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out.printDoc(binaryOperatorDoc(name, thisKind, otherKind), " ")
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when (name) {
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"rem" ->
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out.println(" @SinceKotlin(\"1.1\")")
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}
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out.println(" public operator fun $name(other: ${otherKind.capitalized}): ${returnType.capitalized}")
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}
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out.println()
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}
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private fun generateRangeTo(thisKind: PrimitiveType) {
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for (otherKind in PrimitiveType.onlyNumeric) {
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val returnType =
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maxByDomainCapacity(thisKind, otherKind)
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.let { if (it == PrimitiveType.CHAR) it else maxByDomainCapacity(it, PrimitiveType.INT) }
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if (returnType == PrimitiveType.DOUBLE || returnType == PrimitiveType.FLOAT)
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continue
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out.println(" /** Creates a range from this value to the specified [other] value. */")
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out.println(" public operator fun rangeTo(other: ${otherKind.capitalized}): ${returnType.capitalized}Range")
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}
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out.println()
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}
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private fun generateUnaryOperators(kind: PrimitiveType) {
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for ((name, doc) in unaryOperators) {
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val returnType = if (kind in listOf(PrimitiveType.SHORT, PrimitiveType.BYTE, PrimitiveType.CHAR) &&
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name in listOf("unaryPlus", "unaryMinus")) "Int" else kind.capitalized
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out.println(" /** $doc */")
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out.println(" public operator fun $name(): $returnType")
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}
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out.println()
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}
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private fun generateBitShiftOperators(kind: PrimitiveType) {
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val className = kind.capitalized
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val detail = shiftOperatorsDocDetail(kind)
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for ((name, doc) in shiftOperators) {
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out.println(" /**")
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out.println(" * $doc")
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out.println(" *")
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out.println(detail.replaceIndent(" "))
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out.println(" */")
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out.println(" public infix fun $name(bitCount: Int): $className")
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out.println()
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}
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}
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private fun generateBitwiseOperators(className: String, since: String?) {
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for ((name, doc) in bitwiseOperators) {
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out.println(" /** $doc */")
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since?.let { out.println(" @SinceKotlin(\"$it\")") }
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out.println(" public infix fun $name(other: $className): $className")
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}
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out.println(" /** Inverts the bits in this value. */")
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since?.let { out.println(" @SinceKotlin(\"$it\")") }
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out.println(" public fun inv(): $className")
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out.println()
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}
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private fun compareByDomainCapacity(type1: PrimitiveType, type2: PrimitiveType): Int =
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if (type1.isIntegral && type2.isIntegral) type1.byteSize - type2.byteSize else type1.ordinal - type2.ordinal
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private fun docForConversionFromFloatingToIntegral(fromFloating: PrimitiveType, toIntegral: PrimitiveType): String {
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require(fromFloating.isFloatingPoint)
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require(toIntegral.isIntegral)
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val thisName = fromFloating.capitalized
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val otherName = toIntegral.capitalized
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return if (compareByDomainCapacity(toIntegral, PrimitiveType.INT) < 0) {
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"""
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* The resulting `$otherName` value is equal to `this.toInt().to$otherName()`.
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*/
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"""
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} else {
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"""
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* The fractional part, if any, is rounded down towards zero.
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* Returns zero if this `$thisName` value is `NaN`, [$otherName.MIN_VALUE] if it's less than `$otherName.MIN_VALUE`,
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* [$otherName.MAX_VALUE] if it's bigger than `$otherName.MAX_VALUE`.
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*/
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"""
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}
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}
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private fun docForConversionFromFloatingToFloating(fromFloating: PrimitiveType, toFloating: PrimitiveType): String {
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require(fromFloating.isFloatingPoint)
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require(toFloating.isFloatingPoint)
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val thisName = fromFloating.capitalized
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val otherName = toFloating.capitalized
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return if (compareByDomainCapacity(toFloating, fromFloating) < 0) {
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"""
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* The resulting value is the closest `$otherName` to this `$thisName` value.
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* In case when this `$thisName` value is exactly between two `$otherName`s,
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* the one with zero at least significant bit of mantissa is selected.
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*/
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"""
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} else {
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"""
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* The resulting `$otherName` value represents the same numerical value as this `$thisName`.
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*/
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"""
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}
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}
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private fun docForConversionFromIntegralToIntegral(fromIntegral: PrimitiveType, toIntegral: PrimitiveType): String {
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require(fromIntegral.isIntegral)
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require(toIntegral.isIntegral)
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val thisName = fromIntegral.capitalized
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val otherName = toIntegral.capitalized
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return if (toIntegral == PrimitiveType.CHAR) {
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if (fromIntegral == PrimitiveType.SHORT) {
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"""
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* The resulting `Char` code is equal to this value reinterpreted as an unsigned number,
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* i.e. it has the same binary representation as this `Short`.
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*/
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"""
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} else if (fromIntegral == PrimitiveType.BYTE) {
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"""
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* If this value is non-negative, the resulting `Char` code is equal to this value.
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*
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* The least significant 8 bits of the resulting `Char` code are the same as the bits of this `Byte` value,
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* whereas the most significant 8 bits are filled with the sign bit of this value.
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*/
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"""
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} else {
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"""
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* If this value is in the range of `Char` codes `Char.MIN_VALUE..Char.MAX_VALUE`,
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* the resulting `Char` code is equal to this value.
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*
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* The resulting `Char` code is represented by the least significant 16 bits of this `$thisName` value.
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*/
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"""
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}
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} else if (compareByDomainCapacity(toIntegral, fromIntegral) < 0) {
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"""
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* If this value is in [$otherName.MIN_VALUE]..[$otherName.MAX_VALUE], the resulting `$otherName` value represents
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* the same numerical value as this `$thisName`.
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*
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* The resulting `$otherName` value is represented by the least significant ${toIntegral.bitSize} bits of this `$thisName` value.
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*/
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"""
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} else {
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"""
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* The resulting `$otherName` value represents the same numerical value as this `$thisName`.
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*
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* The least significant ${fromIntegral.bitSize} bits of the resulting `$otherName` value are the same as the bits of this `$thisName` value,
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* whereas the most significant ${toIntegral.bitSize - fromIntegral.bitSize} bits are filled with the sign bit of this value.
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*/
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"""
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}
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}
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private fun docForConversionFromIntegralToFloating(fromIntegral: PrimitiveType, toFloating: PrimitiveType): String {
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require(fromIntegral.isIntegral)
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require(toFloating.isFloatingPoint)
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val thisName = fromIntegral.capitalized
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val otherName = toFloating.capitalized
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return if (fromIntegral == PrimitiveType.LONG || fromIntegral == PrimitiveType.INT && toFloating == PrimitiveType.FLOAT) {
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"""
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* The resulting value is the closest `$otherName` to this `$thisName` value.
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* In case when this `$thisName` value is exactly between two `$otherName`s,
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* the one with zero at least significant bit of mantissa is selected.
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*/
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"""
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} else {
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"""
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* The resulting `$otherName` value represents the same numerical value as this `$thisName`.
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*/
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"""
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}
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}
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private fun generateConversions(kind: PrimitiveType) {
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fun isConversionDeprecated(otherKind: PrimitiveType): Boolean {
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return kind in PrimitiveType.floatingPoint && otherKind in listOf(PrimitiveType.BYTE, PrimitiveType.SHORT)
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}
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val thisName = kind.capitalized
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for (otherKind in PrimitiveType.exceptBoolean) {
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val otherName = otherKind.capitalized
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val doc = if (kind == otherKind) {
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" /** Returns this value. */"
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} else {
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val detail = if (kind in PrimitiveType.integral) {
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if (otherKind.isIntegral) {
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docForConversionFromIntegralToIntegral(kind, otherKind)
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} else {
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docForConversionFromIntegralToFloating(kind, otherKind)
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}
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} else {
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if (otherKind.isIntegral) {
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docForConversionFromFloatingToIntegral(kind, otherKind)
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} else {
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docForConversionFromFloatingToFloating(kind, otherKind)
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}
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}
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" /**\n * Converts this [$thisName] value to [$otherName].\n *\n" + detail.replaceIndent(" ")
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}
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out.println(doc)
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if (isConversionDeprecated(otherKind)) {
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out.println(" @Deprecated(\"Unclear conversion. To achieve the same result convert to Int explicitly and then to $otherName.\", ReplaceWith(\"toInt().to$otherName()\"))")
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}
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out.println(" public override fun to$otherName(): $otherName")
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}
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}
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}
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class GenerateFloorDivMod(out: PrintWriter) : BuiltInsSourceGenerator(out) {
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override fun getMultifileClassName() = "NumbersKt"
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override fun generateBody() {
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out.println("import kotlin.math.sign")
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out.println()
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val integerTypes = PrimitiveType.integral intersect PrimitiveType.onlyNumeric
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for (thisType in integerTypes) {
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for (otherType in integerTypes) {
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generateFloorDiv(thisType, otherType)
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generateMod(thisType, otherType)
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}
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}
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val fpTypes = PrimitiveType.floatingPoint
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for (thisType in fpTypes) {
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for (otherType in fpTypes) {
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generateFpMod(thisType, otherType)
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}
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}
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}
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private fun generateFloorDiv(thisKind: PrimitiveType, otherKind: PrimitiveType) {
|
|
val returnType = getOperatorReturnType(thisKind, otherKind)
|
|
val returnTypeName = returnType.capitalized
|
|
out.printDoc(GeneratePrimitives.binaryOperatorDoc("floorDiv", thisKind, otherKind), "")
|
|
out.println("""@SinceKotlin("1.5")""")
|
|
out.println("@kotlin.internal.InlineOnly")
|
|
val declaration = "public inline fun ${thisKind.capitalized}.floorDiv(other: ${otherKind.capitalized}): $returnTypeName"
|
|
if (thisKind == otherKind && thisKind >= PrimitiveType.INT) {
|
|
out.println(
|
|
"""
|
|
$declaration {
|
|
var q = this / other
|
|
if (this xor other < 0 && q * other != this) q--
|
|
return q
|
|
}
|
|
""".trimIndent()
|
|
)
|
|
} else {
|
|
out.println("$declaration = ")
|
|
out.println(" ${
|
|
convert("this", thisKind, returnType)}.floorDiv(${convert("other", otherKind, returnType)})")
|
|
}
|
|
out.println()
|
|
}
|
|
|
|
private fun generateMod(thisKind: PrimitiveType, otherKind: PrimitiveType) {
|
|
val operationType = getOperatorReturnType(thisKind, otherKind)
|
|
val returnType = otherKind
|
|
out.printDoc(GeneratePrimitives.binaryOperatorDoc("mod", thisKind, otherKind),"")
|
|
out.println("""@SinceKotlin("1.5")""")
|
|
out.println("@kotlin.internal.InlineOnly")
|
|
val declaration = "public inline fun ${thisKind.capitalized}.mod(other: ${otherKind.capitalized}): ${returnType.capitalized}"
|
|
if (thisKind == otherKind && thisKind >= PrimitiveType.INT) {
|
|
out.println(
|
|
"""
|
|
$declaration {
|
|
val r = this % other
|
|
return r + (other and (((r xor other) and (r or -r)) shr ${operationType.bitSize - 1}))
|
|
}
|
|
""".trimIndent()
|
|
)
|
|
} else {
|
|
out.println("$declaration = ")
|
|
out.println(" " + convert(
|
|
"${convert("this", thisKind, operationType)}.mod(${convert("other", otherKind, operationType)})",
|
|
operationType, returnType
|
|
))
|
|
}
|
|
out.println()
|
|
}
|
|
|
|
private fun generateFpMod(thisKind: PrimitiveType, otherKind: PrimitiveType) {
|
|
val operationType = getOperatorReturnType(thisKind, otherKind)
|
|
out.printDoc(GeneratePrimitives.binaryOperatorDoc("mod", thisKind, otherKind), "")
|
|
out.println("""@SinceKotlin("1.5")""")
|
|
out.println("@kotlin.internal.InlineOnly")
|
|
val declaration = "public inline fun ${thisKind.capitalized}.mod(other: ${otherKind.capitalized}): ${operationType.capitalized}"
|
|
if (thisKind == otherKind && thisKind >= PrimitiveType.INT) {
|
|
out.println(
|
|
"""
|
|
$declaration {
|
|
val r = this % other
|
|
return if (r != ${convert("0.0", PrimitiveType.DOUBLE, operationType)} && r.sign != other.sign) r + other else r
|
|
}
|
|
""".trimIndent()
|
|
)
|
|
} else {
|
|
out.println("$declaration = ")
|
|
out.println(" ${convert("this", thisKind, operationType)}.mod(${convert("other", otherKind, operationType)})")
|
|
}
|
|
out.println()
|
|
}
|
|
|
|
}
|
|
|
|
|
|
private fun maxByDomainCapacity(type1: PrimitiveType, type2: PrimitiveType): PrimitiveType
|
|
= if (type1.ordinal > type2.ordinal) type1 else type2
|
|
|
|
private fun getOperatorReturnType(kind1: PrimitiveType, kind2: PrimitiveType): PrimitiveType {
|
|
require(kind1 != PrimitiveType.BOOLEAN) { "kind1 must not be BOOLEAN" }
|
|
require(kind2 != PrimitiveType.BOOLEAN) { "kind2 must not be BOOLEAN" }
|
|
return maxByDomainCapacity(maxByDomainCapacity(kind1, kind2), PrimitiveType.INT)
|
|
}
|
|
|