Merge branch 'ast' into parser

.scalafmt.conf

@@ -3,3 +3,4 @@ runner.dialect = scala3
 
 binPack.literalsExclude = []
 indent.infix.excludeRegex = "^$"
+maxColumn = 100

project.scala

@@ -3,6 +3,7 @@
 
 // dependencies
 //> using dep com.github.j-mie6::parsley::5.0.0-M10
+//> using dep com.github.j-mie6::parsley-cats::1.3.0
 //> using dep com.lihaoyi::os-lib::0.11.3
 //> using dep com.github.scopt::scopt::4.1.0
 //> using test.dep org.scalatest::scalatest::3.2.19

src/main/wacc/ast.scala

@@ -1,6 +1,7 @@
 package wacc
 
 import parsley.generic._
+import cats.data.NonEmptyList
 
 object ast {
   // Expressions
@@ -24,10 +25,8 @@ object ast {
   case object PairLiter extends Expr6 with ParserBridge0[PairLiter.type]
   case class Ident(v: String) extends Expr6 with LValue
   object Ident extends ParserBridge1[String, Ident]
-  case class ArrayElem(name: Ident, indices: List[Expr])
-      extends Expr6
-      with LValue
-  object ArrayElem extends ParserBridge2[Ident, List[Expr], ArrayElem]
+  case class ArrayElem(name: Ident, indices: NonEmptyList[Expr]) extends Expr6 with LValue
+  object ArrayElem extends ParserBridge2[Ident, NonEmptyList[Expr], ArrayElem]
   case class Parens(expr: Expr) extends Expr6
   object Parens extends ParserBridge1[Expr, Parens]
 
@@ -78,31 +77,26 @@ object ast {
   case object BoolType extends BaseType with ParserBridge0[BoolType.type]
   case object CharType extends BaseType with ParserBridge0[CharType.type]
   case object StringType extends BaseType with ParserBridge0[StringType.type]
-  case class ArrayType(elemType: Type, dimensions: Int)
-      extends Type
-      with PairElemType
+  case class ArrayType(elemType: Type, dimensions: Int) extends Type with PairElemType
   object ArrayType extends ParserBridge2[Type, Int, ArrayType]
   case class PairType(fst: PairElemType, snd: PairElemType) extends Type
   object PairType extends ParserBridge2[PairElemType, PairElemType, PairType]
 
   sealed trait PairElemType
-  case object UntypedPairType
-      extends PairElemType
-      with ParserBridge0[UntypedPairType.type]
+  case object UntypedPairType extends PairElemType with ParserBridge0[UntypedPairType.type]
 
   // waccadoodledo
-  case class Program(funcs: List[FuncDecl], main: List[Stmt])
-  object Program extends ParserBridge2[List[FuncDecl], List[Stmt], Program]
+  case class Program(funcs: List[FuncDecl], main: NonEmptyList[Stmt])
+  object Program extends ParserBridge2[List[FuncDecl], NonEmptyList[Stmt], Program]
 
   // Function Definitions
   case class FuncDecl(
       returnType: Type,
       name: Ident,
       params: List[Param],
-      body: List[Stmt]
+      body: NonEmptyList[Stmt]
   )
-  object FuncDecl
-      extends ParserBridge4[Type, Ident, List[Param], List[Stmt], FuncDecl]
+  object FuncDecl extends ParserBridge4[Type, Ident, List[Param], NonEmptyList[Stmt], FuncDecl]
 
   case class Param(paramType: Type, name: Ident)
   object Param extends ParserBridge2[Type, Ident, Param]
@@ -124,13 +118,12 @@ object ast {
   object Exit extends ParserBridge1[Expr, Exit]
   case class Print(expr: Expr, newline: Boolean) extends Stmt
   object Print extends ParserBridge2[Expr, Boolean, Print]
-  case class If(cond: Expr, thenStmt: List[Stmt], elseStmt: List[Stmt])
-      extends Stmt
-  object If extends ParserBridge3[Expr, List[Stmt], List[Stmt], If]
-  case class While(cond: Expr, body: List[Stmt]) extends Stmt
-  object While extends ParserBridge2[Expr, List[Stmt], While]
-  case class Block(stmt: List[Stmt]) extends Stmt
-  object Block extends ParserBridge1[List[Stmt], Block]
+  case class If(cond: Expr, thenStmt: NonEmptyList[Stmt], elseStmt: NonEmptyList[Stmt]) extends Stmt
+  object If extends ParserBridge3[Expr, NonEmptyList[Stmt], NonEmptyList[Stmt], If]
+  case class While(cond: Expr, body: NonEmptyList[Stmt]) extends Stmt
+  object While extends ParserBridge2[Expr, NonEmptyList[Stmt], While]
+  case class Block(stmt: NonEmptyList[Stmt]) extends Stmt
+  object Block extends ParserBridge1[NonEmptyList[Stmt], Block]
 
   sealed trait LValue
 

src/main/wacc/lexer.scala

@@ -12,22 +12,19 @@ object lexer {
     ),
     symbolDesc = SymbolDesc.plain.copy(
       hardKeywords = Set(
-        "begin", "end", "is", "skip", "if", "then", "else", "fi", "while", "do",
-        "done", "read", "free", "return", "exit", "print", "println", "true",
-        "false", "int", "bool", "char", "string", "pair", "newpair", "fst",
-        "snd", "call", "chr", "ord", "len", "null"
+        "begin", "end", "is", "skip", "if", "then", "else", "fi", "while", "do", "done", "read",
+        "free", "return", "exit", "print", "println", "true", "false", "int", "bool", "char",
+        "string", "pair", "newpair", "fst", "snd", "call", "chr", "ord", "len", "null"
       ),
       hardOperators = Set(
-        "+", "-", "*", "/", "%", ">", "<", ">=", "<=", "==", "!=", "&&", "||",
-        "!"
+        "+", "-", "*", "/", "%", ">", "<", ">=", "<=", "==", "!=", "&&", "||", "!"
       )
     ),
     spaceDesc = SpaceDesc.plain.copy(
       lineCommentStart = "#"
     ),
     textDesc = TextDesc.plain.copy(
-      graphicCharacter =
-        Basic(c => c >= ' ' && c != '\\' && c != '\'' && c != '"'),
+      graphicCharacter = Basic(c => c >= ' ' && c != '\\' && c != '\'' && c != '"'),
       escapeSequences = EscapeDesc.plain.copy(
         literals = Set('\\', '"', '\''),
         mapping = Map(

src/main/wacc/parser.scala

@@ -2,9 +2,11 @@ package wacc
 
 import parsley.Result
 import parsley.Parsley
-import parsley.Parsley.{atomic, many, pure, some}
-import parsley.combinator.{countSome, sepBy, sepBy1}
+import parsley.Parsley.{atomic, many, pure}
+import parsley.combinator.{countSome, sepBy}
 import parsley.expr.{precedence, SOps, InfixL, InfixN, InfixR, Prefix, Atoms}
+import parsley.cats.combinator.{sepBy1, some}
+import cats.data.NonEmptyList
 
 object parser {
   import lexer.implicits.implicitSymbol
@@ -83,7 +85,7 @@ object parser {
     `<stmt>` <~ "end"
   )
   private lazy val `<param>` = Param(`<type>`, `<ident>`)
-  private lazy val `<stmt>`: Parsley[List[Stmt]] =
+  private lazy val `<stmt>`: Parsley[NonEmptyList[Stmt]] =
     sepBy1(`<basic-stmt>`, ";")
   private lazy val `<basic-stmt>` =
     (Skip from atomic("skip"))

src/test/wacc/examples.scala

@@ -4,10 +4,7 @@ import org.scalatest.{ParallelTestExecution, BeforeAndAfterAll}
 import org.scalatest.flatspec.AnyFlatSpec
 import org.scalatest.Inspectors.forEvery
 
-class ParallelExamplesSpec
-    extends AnyFlatSpec
-    with BeforeAndAfterAll
-    with ParallelTestExecution {
+class ParallelExamplesSpec extends AnyFlatSpec with BeforeAndAfterAll with ParallelTestExecution {
   val files =
     allWaccFiles("wacc-examples/valid").map { p =>
       (p.toString, List(0))