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fix #31 type records for simple types and extern keyword for methods/functions

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This commit is contained in:
Sergey Chernov 2025-06-17 18:41:44 +04:00
parent d969d6d572
commit 75a6f20150
5 changed files with 98 additions and 25 deletions
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2
lynglib/src/commonMain/kotlin/net/sergeych/lyng/ArgsDeclaration.kt
View File

@ -110,7 +110,7 @@ data class ArgsDeclaration(val params: List<Item>, val endTokenType: Token.Type)
*/
data class Item(
val name: String,
val type: TypeDecl = TypeDecl.Obj,
val type: TypeDecl = TypeDecl.TypeAny,
val pos: Pos = Pos.builtIn,
val isEllipsis: Boolean = false,
/**

54
lynglib/src/commonMain/kotlin/net/sergeych/lyng/Compiler.kt
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@ -227,7 +227,7 @@ class Compiler(
operand = Accessor({ cxt ->
val i = index.execute(cxt)
val x = left.getter(cxt).value
if( x == ObjNull && isOptional) ObjNull.asReadonly
if (x == ObjNull && isOptional) ObjNull.asReadonly
else x.getAt(cxt, i).asMutable
}) { cxt, newValue ->
val i = (index.execute(cxt) as? ObjInt)?.value?.toInt()
@ -394,7 +394,7 @@ class Compiler(
val callStatement = statement {
// and the source closure of the lambda which might have other thisObj.
val context = AppliedContext(closure!!,args,this)
val context = AppliedContext(closure!!, args, this)
if (argsDeclaration == null) {
// no args: automatic var 'it'
val l = args.list
@ -560,11 +560,11 @@ class Compiler(
}
private fun parseTypeDeclaration(cc: CompilerContext): TypeDecl {
val result = TypeDecl.Obj
cc.ifNextIs(Token.Type.COLON) {
TODO("parse type declaration here")
}
return result
return if (cc.skipTokenOfType(Token.Type.COLON, isOptional = true)) {
val tt = cc.requireToken(Token.Type.ID, "type name or type expression required")
val isNullable = cc.skipTokenOfType(Token.Type.QUESTION, isOptional = true)
TypeDecl.Simple(tt.value, isNullable)
} else TypeDecl.TypeAny
}
/**
@ -590,6 +590,8 @@ class Compiler(
cc.previous()
parseExpression(cc)?.let { args += ParsedArgument(it, t.pos) }
?: throw ScriptError(t.pos, "Expecting arguments list")
if (cc.current().type == Token.Type.COLON)
parseTypeDeclaration(cc)
// Here should be a valid termination:
}
}
@ -724,7 +726,7 @@ class Compiler(
}
/**
* Parse keyword-starting statenment.
* Parse keyword-starting statement.
* @return parsed statement or null if, for example. [id] is not among keywords
*/
private fun parseKeywordStatement(id: Token, cc: CompilerContext): Statement? = when (id.value) {
@ -735,7 +737,6 @@ class Compiler(
"for" -> parseForStatement(cc)
"break" -> parseBreakStatement(id.pos, cc)
"continue" -> parseContinueStatement(id.pos, cc)
"fn", "fun" -> parseFunctionDeclaration(cc)
"if" -> parseIfStatement(cc)
"class" -> parseClassDeclaration(cc, false)
"try" -> parseTryStatement(cc)
@ -744,11 +745,16 @@ class Compiler(
else -> {
// triples
cc.previous()
val isExtern = cc.skipId("extern")
when {
cc.matchQualifiers("fun", "private") -> parseFunctionDeclaration(cc, Visibility.Private)
cc.matchQualifiers("fn", "private") -> parseFunctionDeclaration(cc, Visibility.Private)
cc.matchQualifiers("fun", "open") -> parseFunctionDeclaration(cc, isOpen = true)
cc.matchQualifiers("fn", "open") -> parseFunctionDeclaration(cc, isOpen = true)
cc.matchQualifiers("fun", "private") -> parseFunctionDeclaration(cc, Visibility.Private, isExtern)
cc.matchQualifiers("fn", "private") -> parseFunctionDeclaration(cc, Visibility.Private, isExtern)
cc.matchQualifiers("fun", "open") -> parseFunctionDeclaration(cc, isOpen = true, isExtern = isExtern)
cc.matchQualifiers("fn", "open") -> parseFunctionDeclaration(cc, isOpen = true, isExtern = isExtern)
cc.matchQualifiers("fun") -> parseFunctionDeclaration(cc, isOpen = false, isExtern = isExtern)
cc.matchQualifiers("fn") -> parseFunctionDeclaration(cc, isOpen = false, isExtern = isExtern)
cc.matchQualifiers("val", "private") -> parseVarDeclaration(false, Visibility.Private, cc)
cc.matchQualifiers("var", "private") -> parseVarDeclaration(true, Visibility.Private, cc)
cc.matchQualifiers("val", "open") -> parseVarDeclaration(false, Visibility.Private, cc, true)
@ -1419,29 +1425,35 @@ class Compiler(
}
private fun parseFunctionDeclaration(
tokens: CompilerContext,
cc: CompilerContext,
visibility: Visibility = Visibility.Public,
@Suppress("UNUSED_PARAMETER") isOpen: Boolean = false
@Suppress("UNUSED_PARAMETER") isOpen: Boolean = false,
isExtern: Boolean = false
): Statement {
var t = tokens.next()
var t = cc.next()
val start = t.pos
val name = if (t.type != Token.Type.ID)
throw ScriptError(t.pos, "Expected identifier after 'fn'")
else t.value
t = tokens.next()
t = cc.next()
if (t.type != Token.Type.LPAREN)
throw ScriptError(t.pos, "Bad function definition: expected '(' after 'fn ${name}'")
val argsDeclaration = parseArgsDeclaration(tokens)
val argsDeclaration = parseArgsDeclaration(cc)
if (argsDeclaration == null || argsDeclaration.endTokenType != Token.Type.RPAREN)
throw ScriptError(
t.pos,
"Bad function definition: expected valid argument declaration or () after 'fn ${name}'"
)
if (cc.current().type == Token.Type.COLON) parseTypeDeclaration(cc)
// Here we should be at open body
val fnStatements = parseBlock(tokens)
val fnStatements = if (isExtern)
statement { raiseError("extern function not provided: $name") }
else
parseBlock(cc)
var closure: Context? = null
@ -1617,7 +1629,7 @@ class Compiler(
// bitwise or 2
// bitwise and 3
// equality/ne 4
Operator.simple(Token.Type.EQARROW, ++lastPrty) { c, a, b -> ObjMapEntry(a,b) },
Operator.simple(Token.Type.EQARROW, ++lastPrty) { c, a, b -> ObjMapEntry(a, b) },
//
Operator.simple(Token.Type.EQ, ++lastPrty) { c, a, b -> ObjBool(a.compareTo(c, b) == 0) },
Operator.simple(Token.Type.NEQ, lastPrty) { c, a, b -> ObjBool(a.compareTo(c, b) != 0) },
@ -1634,7 +1646,7 @@ class Compiler(
Operator.simple(Token.Type.IS, lastPrty) { c, a, b -> ObjBool(a.isInstanceOf(b)) },
Operator.simple(Token.Type.NOTIS, lastPrty) { c, a, b -> ObjBool(!a.isInstanceOf(b)) },
Operator.simple(Token.Type.ELVIS, ++lastPrty) { c, a, b -> if( a == ObjNull) b else a },
Operator.simple(Token.Type.ELVIS, ++lastPrty) { c, a, b -> if (a == ObjNull) b else a },
// shuttle <=> 6
Operator.simple(Token.Type.SHUTTLE, ++lastPrty) { c, a, b ->

15
lynglib/src/commonMain/kotlin/net/sergeych/lyng/CompilerContext.kt
View File

@ -53,6 +53,20 @@ internal class CompilerContext(val tokens: List<Token>) {
fun currentPos(): Pos = tokens[currentIndex].pos
/**
* If the next token is identifier `name`, skip it and return `true`.
* else leave where it is and return `false`
*/
fun skipId(name: String): Boolean {
current().let { t ->
if( t.type == Token.Type.ID && t.value == name ) {
next()
return true
}
}
return false
}
/**
* Skips next token if its type is `tokenType`, returns `true` if so.
* @param errorMessage message to throw if next token is not `tokenType`
@ -96,7 +110,6 @@ internal class CompilerContext(val tokens: List<Token>) {
}
}
@Suppress("NOTHING_TO_INLINE")
inline fun addBreak() {
breakFound = true
}

9
lynglib/src/commonMain/kotlin/net/sergeych/lyng/TypeDecl.kt
View File

@ -1,9 +1,14 @@
@file:Suppress("unused")
package net.sergeych.lyng
// this is highly experimental and subject to complete redesign
// very soon
sealed class TypeDecl {
sealed class TypeDecl(val isNullable:Boolean = false) {
// ??
// data class Fn(val argTypes: List<ArgsDeclaration.Item>, val retType: TypeDecl) : TypeDecl()
object Obj : TypeDecl()
object TypeAny : TypeDecl()
object TypeNullableAny : TypeDecl(true)
class Simple(val name: String,isNullable: Boolean) : TypeDecl(isNullable)
}

43
lynglib/src/commonTest/kotlin/TypesTest.kt
View File

@ -1,10 +1,53 @@
import kotlinx.coroutines.test.runTest
import net.sergeych.lyng.eval
import kotlin.test.Test
class TypesTest {
@Test
fun testTypeCollection1() = runTest {
eval("""
class Point(x: Real, y: Real)
assert(Point(1,2).x == 1)
assert(Point(1,2).y == 2)
assert(Point(1,2) is Point)
""".trimIndent())
}
@Test
fun testTypeCollection2() = runTest {
eval("""
fun fn1(x: Real, y: Real): Real { x + y }
""".trimIndent())
}
@Test
fun testTypeCollection3() = runTest {
eval("""
class Test(a: Int) {
fun fn1(x: Real, y: Real): Real { x + y }
}
""".trimIndent())
}
@Test
fun testExternDeclarations() = runTest {
eval("""
extern fun foo1(a: String): Void
assertThrows { foo1("1") }
class Test(a: Int) {
extern fun fn1(x: Real, y: Real): Real
// extern val b: Int
}
// println("1")
val t = Test(0)
// println(t.b)
// println("2")
assertThrows {
t.fn1(1,2)
}
// println("4")
""".trimIndent())
}
}