language: today, we killed lambdas

parser/src/main/kotlin/gay/pizza/pork/parser/Parser.kt

@@ -56,26 +56,6 @@ class Parser(source: PeekableSource<Token>, val attribution: NodeAttribution) {
     }
   }
 
-  private fun readLambda(): Lambda = within {
-    expect(TokenType.LeftCurly)
-    val arguments = mutableListOf<Symbol>()
-    while (!peek(TokenType.In)) {
-      val symbol = readSymbolRaw()
-      arguments.add(symbol)
-      if (next(TokenType.Comma)) {
-        continue
-      } else {
-        break
-      }
-    }
-    expect(TokenType.In)
-    val items = collect(TokenType.RightCurly) {
-      readExpression()
-    }
-    expect(TokenType.RightCurly)
-    Lambda(arguments, items)
-  }
-
   private fun readParentheses(): Parentheses = within {
     expect(TokenType.LeftParentheses)
     val expression = readExpression()
@@ -128,10 +108,6 @@ class Parser(source: PeekableSource<Token>, val attribution: NodeAttribution) {
         readSymbolCases()
       }
 
-      TokenType.LeftCurly -> {
-        readLambda()
-      }
-
       TokenType.LeftParentheses -> {
         readParentheses()
       }

parser/src/main/kotlin/gay/pizza/pork/parser/Printer.kt

@@ -82,34 +82,6 @@ class Printer(buffer: StringBuilder) : NodeVisitor<Unit> {
     visit(node.symbol)
   }
 
-  override fun visitLambda(node: Lambda) {
-    append("{")
-    if (node.arguments.isNotEmpty()) {
-      append(" ")
-      for ((index, argument) in node.arguments.withIndex()) {
-        visit(argument)
-        if (index + 1 != node.arguments.size) {
-          append(",")
-        }
-        append(" ")
-      }
-    } else {
-      append(" ")
-    }
-    append("in")
-    out.increaseIndent()
-    for (expression in node.expressions) {
-      appendLine()
-      visit(expression)
-    }
-
-    if (node.expressions.isNotEmpty()) {
-      appendLine()
-    }
-    out.decreaseIndent()
-    append("}")
-  }
-
   override fun visitParentheses(node: Parentheses) {
     append("(")
     visit(node.expression)

parser/src/main/kotlin/gay/pizza/pork/parser/TokenType.kt

@@ -24,7 +24,6 @@ enum class TokenType(vararg properties: TokenTypeProperty) {
   Comma(SingleChar(',')),
   False(Keyword("false"), KeywordFamily),
   True(Keyword("true"), KeywordFamily),
-  In(Keyword("in"), KeywordFamily),
   If(Keyword("if"), KeywordFamily),
   Then(Keyword("then"), KeywordFamily),
   Else(Keyword("else"), KeywordFamily),