229 lines
10 KiB
Scala
229 lines
10 KiB
Scala
package wacc
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import parsley.Parsley
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import parsley.generic.ErrorBridge
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import parsley.ap._
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import parsley.position._
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import parsley.syntax.zipped._
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import cats.data.NonEmptyList
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object ast {
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// Expressions
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sealed trait Expr extends RValue
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sealed trait Expr1 extends Expr
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sealed trait Expr2 extends Expr1
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sealed trait Expr3 extends Expr2
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sealed trait Expr4 extends Expr3
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sealed trait Expr5 extends Expr4
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sealed trait Expr6 extends Expr5
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// Atoms
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case class IntLiter(v: Int)(pos: Position) extends Expr6
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object IntLiter extends ParserBridgePos1[Int, IntLiter]
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case class BoolLiter(v: Boolean)(pos: Position) extends Expr6
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object BoolLiter extends ParserBridgePos1[Boolean, BoolLiter]
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case class CharLiter(v: Char)(pos: Position) extends Expr6
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object CharLiter extends ParserBridgePos1[Char, CharLiter]
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case class StrLiter(v: String)(pos: Position) extends Expr6
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object StrLiter extends ParserBridgePos1[String, StrLiter]
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case class PairLiter()(pos: Position) extends Expr6
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object PairLiter extends ParserBridgePos0[PairLiter]
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case class Ident(v: String, var uid: Int = -1)(pos: Position) extends Expr6 with LValue
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object Ident extends ParserBridgePos1[String, Ident] {
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def apply(v: String)(pos: Position): Ident = new Ident(v)(pos)
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}
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case class ArrayElem(name: Ident, indices: NonEmptyList[Expr])(pos: Position)
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extends Expr6
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with LValue
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object ArrayElem extends ParserBridgePos1[NonEmptyList[Expr], Ident => ArrayElem] {
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def apply(a: NonEmptyList[Expr])(pos: Position): Ident => ArrayElem =
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name => ArrayElem(name, a)(pos)
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}
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case class Parens(expr: Expr)(pos: Position) extends Expr6
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object Parens extends ParserBridgePos1[Expr, Parens]
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// Unary operators
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sealed trait UnaryOp extends Expr {
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val x: Expr
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}
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case class Negate(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
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object Negate extends ParserBridgePos1[Expr6, Negate]
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case class Not(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
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object Not extends ParserBridgePos1[Expr6, Not]
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case class Len(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
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object Len extends ParserBridgePos1[Expr6, Len]
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case class Ord(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
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object Ord extends ParserBridgePos1[Expr6, Ord]
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case class Chr(x: Expr6)(pos: Position) extends Expr6 with UnaryOp
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object Chr extends ParserBridgePos1[Expr6, Chr]
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// Binary operators
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sealed trait BinaryOp extends Expr {
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val x: Expr
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val y: Expr
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}
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case class Add(x: Expr4, y: Expr5)(pos: Position) extends Expr4 with BinaryOp
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object Add extends ParserBridgePos2[Expr4, Expr5, Add]
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case class Sub(x: Expr4, y: Expr5)(pos: Position) extends Expr4 with BinaryOp
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object Sub extends ParserBridgePos2[Expr4, Expr5, Sub]
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case class Mul(x: Expr5, y: Expr6)(pos: Position) extends Expr5 with BinaryOp
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object Mul extends ParserBridgePos2[Expr5, Expr6, Mul]
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case class Div(x: Expr5, y: Expr6)(pos: Position) extends Expr5 with BinaryOp
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object Div extends ParserBridgePos2[Expr5, Expr6, Div]
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case class Mod(x: Expr5, y: Expr6)(pos: Position) extends Expr5 with BinaryOp
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object Mod extends ParserBridgePos2[Expr5, Expr6, Mod]
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case class Greater(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
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object Greater extends ParserBridgePos2[Expr4, Expr4, Greater]
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case class GreaterEq(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
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object GreaterEq extends ParserBridgePos2[Expr4, Expr4, GreaterEq]
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case class Less(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
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object Less extends ParserBridgePos2[Expr4, Expr4, Less]
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case class LessEq(x: Expr4, y: Expr4)(pos: Position) extends Expr3 with BinaryOp
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object LessEq extends ParserBridgePos2[Expr4, Expr4, LessEq]
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case class Eq(x: Expr3, y: Expr3)(pos: Position) extends Expr2 with BinaryOp
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object Eq extends ParserBridgePos2[Expr3, Expr3, Eq]
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case class Neq(x: Expr3, y: Expr3)(pos: Position) extends Expr2 with BinaryOp
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object Neq extends ParserBridgePos2[Expr3, Expr3, Neq]
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case class And(x: Expr2, y: Expr1)(pos: Position) extends Expr1 with BinaryOp
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object And extends ParserBridgePos2[Expr2, Expr1, And]
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case class Or(x: Expr1, y: Expr)(pos: Position) extends Expr with BinaryOp
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object Or extends ParserBridgePos2[Expr1, Expr, Or]
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// Types
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sealed trait Type
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sealed trait BaseType extends Type with PairElemType
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case class IntType()(pos: Position) extends BaseType
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object IntType extends ParserBridgePos0[IntType]
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case class BoolType()(pos: Position) extends BaseType
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object BoolType extends ParserBridgePos0[BoolType]
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case class CharType()(pos: Position) extends BaseType
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object CharType extends ParserBridgePos0[CharType]
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case class StringType()(pos: Position) extends BaseType
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object StringType extends ParserBridgePos0[StringType]
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case class ArrayType(elemType: Type, dimensions: Int)(pos: Position)
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extends Type
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with PairElemType
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object ArrayType extends ParserBridgePos1[Int, Type => ArrayType] {
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def apply(a: Int)(pos: Position): Type => ArrayType = elemType => ArrayType(elemType, a)(pos)
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}
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case class PairType(fst: PairElemType, snd: PairElemType)(pos: Position) extends Type
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object PairType extends ParserBridgePos2[PairElemType, PairElemType, PairType]
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sealed trait PairElemType
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case class UntypedPairType()(pos: Position) extends PairElemType
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object UntypedPairType extends ParserBridgePos0[UntypedPairType]
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// waccadoodledo
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case class Program(funcs: List[FuncDecl], main: NonEmptyList[Stmt])(pos: Position)
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object Program extends ParserBridgePos2[List[FuncDecl], NonEmptyList[Stmt], Program]
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// Function Definitions
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case class FuncDecl(
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returnType: Type,
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name: Ident,
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params: List[Param],
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body: NonEmptyList[Stmt]
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)(pos: Position)
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object FuncDecl
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extends ParserBridgePos2[
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List[Param],
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NonEmptyList[Stmt],
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((Type, Ident)) => FuncDecl
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] {
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def apply(params: List[Param], body: NonEmptyList[Stmt])(
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pos: Position
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): ((Type, Ident)) => FuncDecl =
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(returnType, name) => FuncDecl(returnType, name, params, body)(pos)
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}
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case class Param(paramType: Type, name: Ident)(pos: Position)
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object Param extends ParserBridgePos2[Type, Ident, Param]
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// Statements
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sealed trait Stmt
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case class Skip()(pos: Position) extends Stmt
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object Skip extends ParserBridgePos0[Skip]
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case class VarDecl(varType: Type, name: Ident, value: RValue)(pos: Position) extends Stmt
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object VarDecl extends ParserBridgePos3[Type, Ident, RValue, VarDecl]
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case class Assign(lhs: LValue, value: RValue)(pos: Position) extends Stmt
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object Assign extends ParserBridgePos2[LValue, RValue, Assign]
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case class Read(lhs: LValue)(pos: Position) extends Stmt
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object Read extends ParserBridgePos1[LValue, Read]
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case class Free(expr: Expr)(pos: Position) extends Stmt
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object Free extends ParserBridgePos1[Expr, Free]
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case class Return(expr: Expr)(pos: Position) extends Stmt
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object Return extends ParserBridgePos1[Expr, Return]
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case class Exit(expr: Expr)(pos: Position) extends Stmt
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object Exit extends ParserBridgePos1[Expr, Exit]
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case class Print(expr: Expr, newline: Boolean)(pos: Position) extends Stmt
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object Print extends ParserBridgePos2[Expr, Boolean, Print]
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case class If(cond: Expr, thenStmt: NonEmptyList[Stmt], elseStmt: NonEmptyList[Stmt])(
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pos: Position
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) extends Stmt
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object If extends ParserBridgePos3[Expr, NonEmptyList[Stmt], NonEmptyList[Stmt], If]
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case class While(cond: Expr, body: NonEmptyList[Stmt])(pos: Position) extends Stmt
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object While extends ParserBridgePos2[Expr, NonEmptyList[Stmt], While]
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case class Block(stmt: NonEmptyList[Stmt])(pos: Position) extends Stmt
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object Block extends ParserBridgePos1[NonEmptyList[Stmt], Block]
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sealed trait LValue
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sealed trait RValue
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case class ArrayLiter(elems: List[Expr])(pos: Position) extends RValue
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object ArrayLiter extends ParserBridgePos1[List[Expr], ArrayLiter]
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case class NewPair(fst: Expr, snd: Expr)(pos: Position) extends RValue
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object NewPair extends ParserBridgePos2[Expr, Expr, NewPair]
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case class Call(name: Ident, args: List[Expr])(pos: Position) extends RValue
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object Call extends ParserBridgePos2[Ident, List[Expr], Call]
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sealed trait PairElem extends LValue with RValue
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case class Fst(elem: LValue)(pos: Position) extends PairElem
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object Fst extends ParserBridgePos1[LValue, Fst]
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case class Snd(elem: LValue)(pos: Position) extends PairElem
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object Snd extends ParserBridgePos1[LValue, Snd]
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// Parser bridges
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case class Position(line: Int, column: Int, offset: Int)
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trait ParserSingletonBridgePos[+A] extends ErrorBridge {
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protected def con(pos: (Int, Int), offset: Int): A
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infix def from(op: Parsley[?]): Parsley[A] = error((pos, offset).zipped(con) <~ op)
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final def <#(op: Parsley[?]): Parsley[A] = this from op
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}
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trait ParserBridgePos0[+A] extends ParserSingletonBridgePos[A] {
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def apply()(pos: Position): A
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override final def con(pos: (Int, Int), offset: Int): A =
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apply()(Position(pos._1, pos._2, offset))
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}
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trait ParserBridgePos1[-A, +B] extends ParserSingletonBridgePos[A => B] {
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def apply(a: A)(pos: Position): B
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def apply(a: Parsley[A]): Parsley[B] = error(ap1((pos, offset).zipped(con), a))
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override final def con(pos: (Int, Int), offset: Int): A => B =
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this.apply(_)(Position(pos._1, pos._2, offset))
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}
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trait ParserBridgePos2[-A, -B, +C] extends ParserSingletonBridgePos[(A, B) => C] {
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def apply(a: A, b: B)(pos: Position): C
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def apply(a: Parsley[A], b: => Parsley[B]): Parsley[C] = error(
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ap2((pos, offset).zipped(con), a, b)
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)
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override final def con(pos: (Int, Int), offset: Int): (A, B) => C =
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apply(_, _)(Position(pos._1, pos._2, offset))
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}
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trait ParserBridgePos3[-A, -B, -C, +D] extends ParserSingletonBridgePos[(A, B, C) => D] {
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def apply(a: A, b: B, c: C)(pos: Position): D
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def apply(a: Parsley[A], b: => Parsley[B], c: => Parsley[C]): Parsley[D] = error(
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ap3((pos, offset).zipped(con), a, b, c)
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)
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override final def con(pos: (Int, Int), offset: Int): (A, B, C) => D =
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apply(_, _, _)(Position(pos._1, pos._2, offset))
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}
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}
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