Started work on interpreter, commit to fix issues it will depend on

kraken.krak

@@ -8,6 +8,7 @@ import symbol:*
 import tree:*
 import serialize:*
 import c_generator:*
+/*import interpreter:**/
 import os:*
 import compiler_version
 
@@ -19,14 +20,20 @@ fun main(argc: int, argv: **char):int {
         println(compiler_version::version_string)
         exit(0)
     }
-    /*var gram.construct(): grammer*/
+    var input_file_offset = 1
+    var interpret_instead = false
+    if (string(argv[1]) == "-i") {
+        interpret_instead = true
+        input_file_offset++
+    }
+    var kraken_file_name = string(argv[input_file_offset])
+    var executable_name = string(".").join(kraken_file_name.split('.').slice(0,-2))
+    if (argc == input_file_offset+2)
+        executable_name = string(argv[input_file_offset+1])
     // delay construction until we either load it or copy construct it
     var gram: grammer
     var base_dir = string("/").join(string(argv[0]).split('/').slice(0,-2))
-    /*println(base_dir)*/
     var file_name = base_dir + "/krakenGrammer.kgm"
-    /*println(file_name)*/
-
     var compiled_name = file_name + string(".comp_new")
     var compiled_version = 1
     var file_contents = read_file(file_name)
@@ -45,10 +52,7 @@ fun main(argc: int, argv: **char):int {
             if (cached_contents == file_contents) {
                 /*println("loaded_and_valid, using cached version!")*/
                 loaded_and_valid = true
-                /*unpack(gram, pos) = unserialize<grammer>(binary, pos)*/
-                // skip unnecessary copies this way
                 pos = gram.unserialize(binary, pos)
-                /*println("finished unserializeing!!")*/
             } else println("contents different")
         } else println("version number different")
     } else {
@@ -68,26 +72,25 @@ fun main(argc: int, argv: **char):int {
         println("done writing")
     }
 
-    var kraken_file_name = string(argv[1])
     var parse.construct(gram): parser
     var ast_pass.construct(): ast_transformation
     var importer.construct(parse, ast_pass, vector(string(), base_dir + "/stdlib/")): importer
-    /*print("parsing: ")*/
     importer.import(kraken_file_name)
+    if (interpret_instead) {
+        println("Interpreting!")
+        /*var interpret.construct(importer.name_ast_map, importer.ast_pass.ast_to_syntax): interpreter*/
+        /*interpret.call_main()*/
+    } else {
         println("Generating C")
-    /*println("NOW DOING C_GENERATOR")*/
         var c_generator.construct(): c_generator
         var c_output_pair = c_generator.generate_c(importer.name_ast_map, importer.ast_pass.ast_to_syntax)
         var kraken_c_output_name = kraken_file_name + ".c"
         write_file(kraken_c_output_name, c_output_pair.first)
         /*println(string("linker string: ") + c_output_pair.second)*/
-
-    var executable_name = string(".").join(kraken_file_name.split('.').slice(0,-2))
-    if (argc == 3)
-        executable_name = string(argv[2])
         var compile_string = "cc -g -O3 -std=c99 " + c_output_pair.second + " " + kraken_c_output_name + " -o " + executable_name
         println(compile_string)
         system(compile_string)
+    }
 
     return 0
 }

stdlib/ast_transformation.krak

@@ -188,6 +188,7 @@ obj ast_transformation (Object) {
         vector(
             make_pair("operator==", ast_function_ptr(string("operator=="), type_ptr(vector(equals_param->identifier.type), type_ptr(base_type::boolean())), vector(equals_param), false)),
             make_pair("operator!=", ast_function_ptr(string("operator!="), type_ptr(vector(nequals_param->identifier.type), type_ptr(base_type::boolean())), vector(nequals_param), false)),
+            make_pair("construct", ast_function_ptr(string("construct"), type_ptr(vector<*type>(), node->adt_def.self_type->clone_with_increased_indirection()), vector<*ast_node>(), false)),
             make_pair("copy_construct", ast_function_ptr(string("copy_construct"), type_ptr(vector(copy_construct_param->identifier.type), type_ptr(base_type::void_return())), vector(copy_construct_param), false)),
             make_pair("operator=", ast_function_ptr(string("operator="), type_ptr(vector(assign_param->identifier.type), type_ptr(base_type::void_return())), vector(assign_param), false)),
             make_pair("destruct", ast_function_ptr(string("destruct"), type_ptr(vector<*type>(), type_ptr(base_type::void_return())), vector<*ast_node>(), false))
@@ -740,7 +741,7 @@ obj ast_transformation (Object) {
     }
     fun transform_case_statement(node: *tree<symbol>, scope: *ast_node, template_replacements: map<string, *type>): *ast_node {
         var to_ret = ast_case_statement_ptr()
-        var the_adts = scope_lookup(concat_symbol_tree(get_node("scoped_identifier", get_node("scoped_identifier", node))), scope)
+        var the_adts = scope_lookup(concat_symbol_tree(get_node("scoped_identifier", get_node("scoped_identifier", node))), scope).filter(fun(i: *ast_node): bool return is_adt_def(i);)
         if (the_adts.size != 1)
            error(node, string("the number of adts found was not 1, it was ") + the_adts.size + " for " + concat_symbol_tree(get_node("scoped_identifier", node)))
         var the_adt = the_adts[0]

stdlib/c_generator.krak

@@ -303,6 +303,10 @@ obj c_generator (Object) {
                       equals_res.post += generate_from_defer_stack(&defer_stack, -1, enclosing_object, child).one_string()
                       defer_stack.pop()
                       function_definitions += equals_res.one_string() + "return result;\n"
+                    } else if (backing.name == "construct") {
+                      function_definitions += "/*construct*/"
+                      function_definitions += "this->flag = -1;\n"
+                      function_definitions += "return this;\n"
                     } else if (backing.name == "copy_construct") {
                       var param = backing.parameters[0]
                       function_definitions += "/*copy_construct*/"

stdlib/interpreter.krak

@@ -0,0 +1,55 @@
+import io:*
+import map:*
+import string:*
+import util:*
+import tree:*
+import symbol:*
+import ast_nodes:*
+import ast_transformation:*
+
+adt value {
+    integer: int,
+    floating: float
+}
+fun print_value(v: ref value) {
+    match (v) {
+        value::integer(data) println(data)
+        value::floating(data) println(data)
+    }
+}
+
+obj interpreter (Object) {
+    var ast_to_syntax: map<*ast_node, *tree<symbol>>
+    var name_ast_map: map<string, pair<*tree<symbol>,*ast_node>> 
+    fun construct(name_ast_map_in: map<string, pair<*tree<symbol>,*ast_node>>, ast_to_syntax_in: map<*ast_node, *tree<symbol>>): *interpreter {
+        name_ast_map.copy_construct(&name_ast_map_in)
+        ast_to_syntax.copy_construct(&ast_to_syntax_in)
+        return this
+    }
+    fun operator=(old: ref interpreter) {
+        destruct()
+        copy_construct(&old)
+    }
+    fun copy_construct(old: *interpreter) {
+        name_ast_map.copy_construct(&old->name_ast_map)
+        ast_to_syntax.copy_construct(&old->ast_to_syntax)
+    }
+    fun destruct() {
+        name_ast_map.destruct()
+        ast_to_syntax.destruct()
+    }
+    fun call_main() {
+        var results = vector<*ast_node>()
+        name_ast_map.for_each(fun(key: string, value: pair<*tree<symbol>,*ast_node>) {
+            results += scope_lookup(string("main"), value.second)
+        })
+        if (results.size != 1)
+            error(string("wrong number of mains to call: ") + results.size)
+        println("calling main!")
+        print_value(interpret_function_call(results[0], vector<value>()))
+    }
+    fun interpret_function_call(func: *ast_node, params: vector<value>): value {
+        return value::integer(0)
+    }
+}
+