66 lines
1.9 KiB
Plaintext
66 lines
1.9 KiB
Plaintext
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type Field = { Type: string; Name: string }
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type Type = { Name: string; Fields: list<Field> }
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let types =
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[ { Name = "Binary"
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Fields =
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[ { Type = "Expr"; Name = "Left" }
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{ Type = "Token"; Name = "Op" }
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{ Type = "Expr"; Name = "Right" } ] }
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{ Name = "Grouping"
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Fields = [ { Type = "Expr"; Name = "Expression" } ] }
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{ Name = "Literal"
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Fields =
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[ { Type = "System.Object"
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Name = "Value" } ] }
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{ Name = "Unary"
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Fields = [ { Type = "Token"; Name = "Op" }; { Type = "Expr"; Name = "Right" } ] } ]
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let visitorMethod baseName t = $"visit{t.Name}{baseName}"
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let renderIVisitor (sw: System.IO.StreamWriter) (baseName: string) types =
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sw.Write($"public interface IVisitor<T> {{\n")
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for t in types do
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sw.Write($"\tT {visitorMethod baseName t}({t.Name} {baseName.ToLower()});\n")
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sw.Write("}\n")
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let renderType (sw: System.IO.StreamWriter) baseName t =
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sw.Write
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$"public class {t.Name} : {baseName}
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{{\n"
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for f in t.Fields do
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sw.Write $"\tpublic required {f.Type} {f.Name} {{ get; init; }}\n"
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sw.Write
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$"\tpublic override T accept<T>(IVisitor<T> visitor)
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\t{{
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\t\treturn visitor.{visitorMethod baseName t}(this);
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\t}}\n"
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sw.Write("}\n")
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let renderAST outputDir baseName types =
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let path = System.IO.Path.Combine(outputDir, baseName + ".g.cs")
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use sw = new System.IO.StreamWriter(path)
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sw.Write
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$"////////////////////////////////////////////////////////////
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// THIS FILE IS GENERATED. //
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// DO NOT EDIT. //
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////////////////////////////////////////////////////////////
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using System;
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namespace Finn.AST;
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public abstract class {baseName} {{
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\tpublic abstract T accept<T>(IVisitor<T> visitor);
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}}\n"
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renderIVisitor sw baseName types
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List.iter (renderType sw baseName) types
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renderAST "." "Expr" types
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