Start on llvm IR target

.gitignore

@@ -1,3 +1,4 @@
 /it0-out0.diff
 /it1-out*
 /it2-out*
+/it3-out*

0-lang0py/.gitignore

@@ -1,4 +0,0 @@
-/lang0py
-/lang0py.c
-/lang0py.exe
-/lang0py.o

0-lang0py/Makefile

@@ -1,21 +0,0 @@
-.SUFFIXES:
-
-PYVERSION=3.10
-PYPREFIX=/usr
-INCLUDES=-I$(PYPREFIX)/include/python$(PYVERSION)
-CYTHON=cython3
-# No previous iteration to reference
-
-all: lang0py.exe
-
-%.exe: %.o
-	gcc -o $@ $< -lpython$(PYVERSION)
-
-%.o: %.c
-	gcc -c $< $(INCLUDES)
-
-%.c: %.py
-	$(CYTHON) -3 --embed $<
-
-clean:
-	rm -f lang0py.c lang0py.o lang0py.exe

0-lang0py/lang0py.lang0

@@ -1,4 +0,0 @@
-; This file does not exit
-; Iteration 0 is always writing a compiler in an existing environment
-; Sometimes that means binary, sometimes that means assembly
-; Luckily, for us this means we can use Python.

1-lang0py/.gitignore

@@ -1,4 +0,0 @@
-/lang0py*.c
-/lang0py*.exe
-/lang0py*.o
-/lang0py*.py

1-lang0py/Makefile

@@ -1,36 +0,0 @@
-.SUFFIXES:
-
-PYVERSION=3.10
-PYPREFIX=/usr
-INCLUDES=-I$(PYPREFIX)/include/python$(PYVERSION)
-CYTHON=cython3
-LANG0PY=$(CURDIR)/../0-lang0py/lang0py.exe
-
-all: lang0py.exe
-
-%.exe: %.o
-	gcc -o $@ $< -lpython$(PYVERSION)
-
-%.o: %.c
-	gcc -c $< $(INCLUDES)
-
-%.c: %.py
-	$(CYTHON) -3 --embed $<
-
-lang0py0.py: lang0py.lang0 $(LANG0PY)
-	cat $< | $(LANG0PY) > $@
-
-lang0py1.py: lang0py.lang0 lang0py0.exe
-	cat $< | ./lang0py0.exe > $@
-# Cannot diff on the first iteration - platform change
-
-lang0py2.py: lang0py.lang0 lang0py1.exe
-	cat $< | ./lang0py1.exe > $@
-	-diff lang0py1.py lang0py2.py
-
-lang0py.py: lang0py.lang0 lang0py2.exe
-	cat $< | ./lang0py2.exe > $@
-	-diff lang0py2.py lang0py.py
-
-clean:
-	rm -f lang0py*.py lang0py*.c lang0py*.o lang0py*.exe

2-lang0c/.gitignore

@@ -1,4 +0,0 @@
-/lang0c*.c
-/lang0c*.exe
-/lang0c*.o
-/lang0c*.py

2-lang0c/Makefile

@@ -1,42 +0,0 @@
-.SUFFIXES:
-
-PYVERSION=3.10
-PYPREFIX=/usr
-INCLUDES=
-CYTHON=cython3
-LANG0PY=$(CURDIR)/../1-lang0py/lang0py.exe
-
-all: lang0c.exe
-
-%.exe: %.o
-	gcc -o $@ $<
-
-%.o: %.c
-	gcc -c $<
-
-lang0c0.py: lang0c.lang0 $(LANG0PY)
-	cat $< | $(LANG0PY) > $@
-
-lang0c0.c: lang0c0.py
-	$(CYTHON) -3 --embed $<
-
-lang0c0.o: lang0c0.c
-	gcc -c $< -I$(PYPREFIX)/include/python$(PYVERSION)
-
-lang0c0.exe: lang0c0.o
-	gcc -o $@ $< -lpython$(PYVERSION)
-
-lang0c1.c: lang0c.lang0 lang0c0.exe
-	cat $< | ./lang0c0.exe > $@
-# Cannot diff on the first iteration - platform change
-
-lang0c2.c: lang0c.lang0 lang0c1.exe
-	cat $< | ./lang0c1.exe > $@
-	-diff lang0c1.c lang0c2.c
-
-lang0c.c: lang0c.lang0 lang0c2.exe
-	cat $< | ./lang0c2.exe > $@
-	-diff lang0c2.c lang0c.c
-
-clean:
-	rm -f lang0c*.py lang0c*.c lang0c*.o lang0c*.exe

3-lang0ll/.gitignore

@@ -1,4 +0,0 @@
-/lang0c*.c
-/lang0c*.exe
-/lang0c*.ll
-/lang0c*.o

3-lang0ll/Makefile

@@ -1,42 +0,0 @@
-.SUFFIXES:
-
-
-
-
-
-LANG0C=$(CURDIR)/../2-lang0c/lang0c.exe
-
-all: lang0ll.exe
-
-%.exe: %.s
-	clang $^ -o $@
-
-%.s: %.ll
-	llc --relocation-model=pic $^
-
-lang0ll0.c: lang0ll.lang0 $(LANG0C)
-	cat $< | $(LANG0C) > $@
-
-lang0ll0.o: lang0ll0.c
-	gcc -c $<
-
-lang0ll0.exe: lang0ll0.o
-	gcc -o $@ $<
-
-lang0ll1.ll: lang0ll.lang0 lang0ll0.exe
-	cat $< | ./lang0ll0.exe > $@
-# Cannot diff on the first iteration - platform change
-
-lang0ll2.ll: lang0ll.lang0 lang0ll1.exe
-	cat $< | ./lang0ll1.exe > $@
-	-diff lang0ll1.ll lang0ll2.ll
-
-lang0ll.ll: lang0ll.lang0 lang0ll2.exe
-	cat $< | ./lang0ll2.exe > $@
-	-diff lang0ll2.ll lang0ll.ll
-
-foo.ll: foo.c
-	clang -S -emit-llvm $^
-
-clean:
-	rm -f lang0ll*.py lang0ll*.ll lang0ll*.o lang0ll*.exe foo.ll foo.o foo.exe

3-lang0ll/foo.ll

@@ -1,49 +0,0 @@
-; ModuleID = 'foo.c'
-source_filename = "foo.c"
-target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-target triple = "x86_64-pc-linux-gnu"
-
-@.str = private unnamed_addr constant [14 x i8] c"Hello, world!\00", align 1
-@.str.1 = private unnamed_addr constant [16 x i8] c"This is a test.\00", align 1
-
-; Function Attrs: noinline nounwind optnone uwtable
-define dso_local void @print(i8* noundef %0) #0 {
-  %2 = alloca i8*, align 8
-  store i8* %0, i8** %2, align 8
-  ret void
-}
-
-; Function Attrs: noinline nounwind optnone uwtable
-define dso_local i32 @sum(i32 noundef %0, i32 noundef %1) #0 {
-  %3 = alloca i32, align 4
-  %4 = alloca i32, align 4
-  store i32 %0, i32* %3, align 4
-  store i32 %1, i32* %4, align 4
-  %5 = load i32, i32* %3, align 4
-  %6 = load i32, i32* %4, align 4
-  %7 = add nsw i32 %5, %6
-  ret i32 %7
-}
-
-; Function Attrs: noinline nounwind optnone uwtable
-define dso_local i32 @main() #0 {
-  %1 = alloca i32, align 4
-  %2 = alloca i8*, align 8
-  store i32 0, i32* %1, align 4
-  store i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0), i8** %2, align 8
-  call void @print(i8* noundef getelementptr inbounds ([16 x i8], [16 x i8]* @.str.1, i64 0, i64 0))
-  %3 = call i32 @sum(i32 noundef 7, i32 noundef 15)
-  ret i32 %3
-}
-
-attributes #0 = { noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
-
-!llvm.module.flags = !{!0, !1, !2, !3, !4}
-!llvm.ident = !{!5}
-
-!0 = !{i32 1, !"wchar_size", i32 4}
-!1 = !{i32 7, !"PIC Level", i32 2}
-!2 = !{i32 7, !"PIE Level", i32 2}
-!3 = !{i32 7, !"uwtable", i32 1}
-!4 = !{i32 7, !"frame-pointer", i32 2}
-!5 = !{!"Ubuntu clang version 14.0.0-1ubuntu1.1"}

3-lang0ll/lang0ll0.c

@@ -1,608 +0,0 @@
-#include <assert.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-
-char var_eof[2] = {-1, 0};
-char var_eol[2] = {10, 0};
-char var_quote[2] = {34, 0};
-char var_false[1] = {0};
-char var_true[2] = {'1', 0};
-
-
-char * eq(char * a, char * b)
-{
-    return (strcmp(a, b) == 0) ? var_true : var_false;
-}
-
-char * lt(char * a, char * b)
-{
-    return (strcmp(a, b) < 0) ? var_true : var_false;
-}
-char * not(char * a)
-{
-    return (strcmp(a, var_true) != 0) ? var_true : var_false;
-}
-
-char * addstringchar(char * str, char * chr)
-{
-    int str_len = strlen(str);
-    assert(strlen(chr) == 1);
-    char * res = malloc((str_len + 2) * sizeof(char));
-    strcpy(res, str);
-    res[str_len + 0] = chr[0];
-    res[str_len + 1] = 0;
-    return res;
-}
-
-char * emit(char * str)
-{
-    fputs(str, stdout);
-    return 0;
-}
-
-char * trace(char * var_name, char * var_value)
-{
-    const char * env_trace = getenv("TRACE");
-    if( !env_trace ) return 0;
-    fputs(var_name, stderr);
-    fputs("=", stderr);
-    fputs(var_value, stderr);
-    fputs(var_eol, stderr);
-    return 0;
-}
-
-int LINE = 1;
-
-char * peek()
-{
-    char * res = malloc(2*sizeof(char));
-    res[0] = getc(stdin);
-    res[1] = 0;
-    ungetc(res[0], stdin);
-    return res;
-}
-
-void skip()
-{
-    char c = getc(stdin);
-    if( c == 10 ) LINE += 1;
-}
-
-void skipchar(char * chr)
-{
-    assert(strlen(chr) == 1);
-    char * act = peek();
-    assert(strlen(act) == 1);
-    if( chr[0] == act[0] ) {skip(); return;};
-    fprintf(stderr, "Expected '%c' on line %d but saw '%c' instead%c", chr[0], LINE, act[0], 10);
-    exit(1);
-}
-
-char * increaseindent(char * var_indent)
-{
-    var_indent = addstringchar(var_indent, " ");
-    var_indent = addstringchar(var_indent, " ");
-    var_indent = addstringchar(var_indent, " ");
-    var_indent = addstringchar(var_indent, " ");
-    return var_indent;
-}
-
-char * lexident()
-{
-    char * var_char;
-    char * var_isbeforea;
-    char * var_isafterz;
-    char * var_word;
-    var_word = "";
-    while (1)
-    {
-        var_char = peek();
-        var_isbeforea = lt(var_char, "a");
-        if ( 0 < strlen(var_isbeforea) )
-        {
-            break;
-        }
-        var_isafterz = lt("z", var_char);
-        if ( 0 < strlen(var_isafterz) )
-        {
-            break;
-        }
-        var_word = addstringchar(var_word, var_char);
-        skip();
-    }
-    return var_word;
-}
-
-char * parseconststring()
-{
-    char * var_char;
-    char * var_iseof;
-    char * var_isquote;
-    skipchar(var_quote);
-    while (1)
-    {
-        var_char = peek();
-        var_iseof = eq(var_char, var_eof);
-        if ( 0 < strlen(var_iseof) )
-        {
-            break;
-        }
-        var_isquote = eq(var_char, var_quote);
-        if ( 0 < strlen(var_isquote) )
-        {
-            break;
-        }
-        skip();
-    }
-    skipchar(var_quote);
-    emit("i8* noundef getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i64 0, i64 0)");
-    return 0;
-}
-
-char * parseexprvarref()
-{
-    char * var_varname;
-    var_varname = lexident();
-    emit("i8* %");
-    emit(var_varname);
-    return 0;
-}
-
-char * parseexprcall()
-{
-    char * var_char;
-    char * var_first;
-    char * var_funcname;
-    char * var_isspace;
-    char * var_isnotspace;
-    char * var_isfirst;
-    char * var_isnotfirst;
-    char * var_isquote;
-    char * var_isnotquote;
-    var_funcname = lexident();
-    emit(var_funcname);
-    emit("(");
-    var_first = "1";
-    while (1)
-    {
-        var_char = peek();
-        var_isspace = eq(var_char, " ");
-        var_isnotspace = not(var_isspace);
-        if ( 0 < strlen(var_isnotspace) )
-        {
-            break;
-        }
-        skip();
-        var_isfirst = eq(var_first, "1");
-        var_isnotfirst = not(var_isfirst);
-        if ( 0 < strlen(var_isnotfirst) )
-        {
-            emit(", ");
-        }
-        var_char = peek();
-        var_isquote = eq(var_char, var_quote);
-        var_isnotquote = not(var_isquote);
-        if ( 0 < strlen(var_isquote) )
-        {
-            parseconststring();
-        }
-        if ( 0 < strlen(var_isnotquote) )
-        {
-            parseexprvarref();
-        }
-        var_first = "0";
-    }
-    emit(")");
-    return 0;
-}
-
-char * parsestatdeclare(char * var_indent)
-{
-    char * var_var;
-    skipchar(" ");
-    var_var = lexident();
-    emit(var_indent);
-    emit("char * var_");
-    emit(var_var);
-    emit(";");
-    emit(var_eol);
-    skipchar(var_eol);
-    return 0;
-}
-
-char * parsestatset(char * var_indent)
-{
-    char * var_var;
-    skipchar(" ");
-    var_var = lexident();
-    skipchar(" ");
-    emit(var_indent);
-    emit("var_");
-    emit(var_var);
-    emit(" = ");
-    parseconststring();
-    emit(";");
-    emit(var_eol);
-    skipchar(var_eol);
-    return 0;
-}
-
-char * parsestatcalc(char * var_indent)
-{
-    char * var_var;
-    char * var_varidx;
-    skipchar(" ");
-    var_var = lexident();
-    skipchar(" ");
-    emit(var_indent);
-    emit("%");
-    emit(var_var);
-    var_varidx = mapgetkey("funcvarused", var_var);
-    var_varidx = intinc(var_varidx);
-    mapsetkey("funcvarused"var_var, var_varidx, );
-    emit(".");
-    emit(var_varidx);
-    emit(" = call i8* @");
-    parseexprcall();
-    emit(";");
-    emit(var_eol);
-    skipchar(var_eol);
-    return 0;
-}
-
-char * parseblock(char * var_indent);
-char * parsestatif(char * var_indent)
-{
-    char * var_indentt;
-    skipchar(" ");
-    emit(var_indent);
-    emit("if ( 0 < strlen(");
-    parseexprvarref();
-    emit(") )\n");
-    emit(var_indent);
-    emit("{\n");
-    skipchar(var_eol);
-    var_indentt = increaseindent(var_indent);
-    parseblock(var_indentt);
-    emit(var_indent);
-    emit("}\n");
-    return 0;
-}
-
-char * parsestatforever(char * var_indent)
-{
-    char * var_indentt;
-    emit(var_indent);
-    emit("while (1)\n");
-    emit(var_indent);
-    emit("{\n");
-    skipchar(var_eol);
-    var_indentt = increaseindent(var_indent);
-    parseblock(var_indentt);
-    emit(var_indent);
-    emit("}\n");
-    return 0;
-}
-
-char * parsestatbreak(char * var_indent)
-{
-    emit(var_indent);
-    emit("break;\n");
-    skipchar(var_eol);
-    return 0;
-}
-
-char * parsestatreturn(char * var_indent)
-{
-    char * var_char;
-    char * var_isspace;
-    char * var_isnotspace;
-    emit(var_indent);
-    emit("ret ");
-    var_char = peek();
-    var_isspace = eq(var_char, " ");
-    var_isnotspace = not(var_isspace);
-    if ( 0 < strlen(var_isspace) )
-    {
-        skip();
-        parseexprvarref();
-    }
-    if ( 0 < strlen(var_isnotspace) )
-    {
-        emit("i18* 0");
-    }
-    emit(";");
-    emit(var_eol);
-    skipchar(var_eol);
-    return 0;
-}
-
-char * parsestattrace(char * var_indent)
-{
-    char * var_varname;
-    emit(var_indent);
-    emit("trace(");
-    emit(var_quote);
-    skipchar(" ");
-    var_varname = lexident();
-    emit(var_varname);
-    emit(var_quote);
-    emit(", var_");
-    emit(var_varname);
-    emit(");\n");
-    skipchar(var_eol);
-    return 0;
-}
-
-char * parsestat(char * var_indent)
-{
-    char * var_call;
-    char * var_char;
-    char * var_first;
-    char * var_iscall;
-    char * var_isfirst;
-    char * var_isspace;
-    char * var_isquote;
-    char * var_isnotfirst;
-    char * var_isnotspace;
-    char * var_isnotquote;
-    var_call = lexident();
-    trace("call", var_call);
-    var_iscall = eq(var_call, "declare");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatdeclare(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "set");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatset(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "calc");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatcalc(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "if");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatif(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "forever");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatforever(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "break");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatbreak(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "return");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestatreturn(var_indent);
-        return 0;
-    }
-    var_iscall = eq(var_call, "trace");
-    if ( 0 < strlen(var_iscall) )
-    {
-        parsestattrace(var_indent);
-        return 0;
-    }
-    emit(var_indent);
-    emit(var_call);
-    emit("(");
-    var_first = "1";
-    while (1)
-    {
-        var_char = peek();
-        var_isspace = eq(var_char, " ");
-        var_isnotspace = not(var_isspace);
-        if ( 0 < strlen(var_isnotspace) )
-        {
-            break;
-        }
-        skip();
-        var_char = peek();
-        var_isquote = eq(var_char, var_quote);
-        var_isnotquote = not(var_isquote);
-        if ( 0 < strlen(var_isquote) )
-        {
-            parseconststring();
-        }
-        if ( 0 < strlen(var_isnotquote) )
-        {
-            parseexprvarref();
-        }
-        var_isfirst = eq(var_first, "1");
-        var_isnotfirst = not(var_isfirst);
-        if ( 0 < strlen(var_isnotfirst) )
-        {
-            emit(", ");
-        }
-        var_first = "0";
-    }
-    skipchar(var_eol);
-    emit(");\n");
-    return 0;
-}
-
-char * parseblock(char * var_indent)
-{
-    char * var_char;
-    char * var_copy;
-    char * var_iseol;
-    char * var_isnoteol;
-    char * var_isdone;
-    char * var_iseoblock;
-    while (1)
-    {
-        while (1)
-        {
-            var_char = peek();
-            var_iseol = eq(var_char, var_eol);
-            var_isnoteol = not(var_iseol);
-            if ( 0 < strlen(var_isnoteol) )
-            {
-                break;
-            }
-            skip();
-        }
-        var_copy = "    ";
-        while (1)
-        {
-            var_isdone = eq(var_copy, var_indent);
-            if ( 0 < strlen(var_isdone) )
-            {
-                break;
-            }
-            skipchar("\t");
-            var_copy = increaseindent(var_copy);
-        }
-        var_char = peek();
-        var_iseoblock = eq(var_char, "/");
-        if ( 0 < strlen(var_iseoblock) )
-        {
-            skip();
-            skipchar(var_eol);
-            break;
-        }
-        skipchar("\t");
-        parsestat(var_indent);
-    }
-    return 0;
-}
-
-char * parsefunc()
-{
-    char * var_char;
-    char * var_first;
-    char * var_funcname;
-    char * var_iseoblock;
-    char * var_isfirst;
-    char * var_isspace;
-    char * var_isnotfirst;
-    char * var_isnotspace;
-    char * var_var;
-    mapclear("funcvarused");
-    var_funcname = lexident();
-    trace("funcname", var_funcname);
-    emit("define i8* @");
-    emit(var_funcname);
-    emit("(");
-    var_first = "1";
-    while (1)
-    {
-        var_char = peek();
-        var_isspace = eq(var_char, " ");
-        var_isnotspace = not(var_isspace);
-        if ( 0 < strlen(var_isnotspace) )
-        {
-            break;
-        }
-        skip();
-        var_var = lexident();
-        var_isfirst = eq(var_first, "1");
-        var_isnotfirst = not(var_isfirst);
-        if ( 0 < strlen(var_isnotfirst) )
-        {
-            emit(", ");
-        }
-        emit("i8* %");
-        emit(var_var);
-        mapsetkey("funcvarused""var", "0", );
-        emit("_0");
-        var_first = "0";
-    }
-    var_char = peek();
-    var_iseoblock = eq(var_char, "/");
-    if ( 0 < strlen(var_iseoblock) )
-    {
-        skipchar("/");
-        skipchar(var_eol);
-        emit(");");
-        emit("\n");
-        return 0;
-    }
-    skipchar(":");
-    skipchar(var_eol);
-    emit(")\n{\n");
-    parseblock("    ");
-    emit("}\n\n");
-    return 0;
-}
-
-char * emitheader()
-{
-    emit("target datalayout = ");
-    emit(var_quote);
-    emit("e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128");
-    emit(var_quote);
-    emit(var_eol);
-    emit("target triple = ");
-    emit(var_quote);
-    emit("x86_64-pc-linux-gnu");
-    emit(var_quote);
-    emit(var_eol);
-    emit(var_eol);
-    emit("define i8* @addstringchar(i8* %0, i8* %1)");
-    emit(var_eol);
-    emit("{");
-    emit(var_eol);
-    emit("    ; todo");
-    emit(var_eol);
-    emit("    ret i8* %0;");
-    emit(var_eol);
-    emit("}");
-    emit(var_eol);
-    emit(var_eol);
-    return 0;
-}
-
-char * emitfooter()
-{
-    emit("");
-    return 0;
-}
-
-char * main()
-{
-    char * var_char;
-    char * var_iseof;
-    char * var_iseol;
-    char * var_isnoteol;
-    emitheader();
-    while (1)
-    {
-        var_char = peek();
-        var_iseof = eq(var_char, var_eof);
-        if ( 0 < strlen(var_iseof) )
-        {
-            break;
-        }
-        while (1)
-        {
-            var_char = peek();
-            var_iseol = eq(var_char, var_eol);
-            var_isnoteol = not(var_iseol);
-            if ( 0 < strlen(var_isnoteol) )
-            {
-                break;
-            }
-            skip();
-        }
-        parsefunc();
-    }
-    emitfooter();
-    return 0;
-}
-

Makefile

@@ -1,11 +1,93 @@
-all:
+.SUFFIXES:
-	$(MAKE) -C 0-lang0py all
+
-	$(MAKE) -C 1-lang0py all
+GCC_FLAGS := -g -O0 -Wall
-	$(MAKE) -C 2-lang0c all
+
-	$(MAKE) -C tests all
+
+
+all: it2-out
+
+
+
+# it0-out.py => Hand made
+
+
+
+it1-out0.py: it0-out.py it1-in.lang0
+	cat it1-in.lang0 | python3 it0-out.py > it1-out0.py
+
+it1-out1.py: it1-out0.py it1-in.lang0
+	cat it1-in.lang0 | python3 it1-out0.py > it1-out1.py
+# We can diff here since the target hasn't changed
+# The target for it0 is the same as for it1
+	diff it1-out0.py it1-out1.py
+
+it1-out2.py: it1-out1.py it1-in.lang0
+	cat it1-in.lang0 | python3 it1-out1.py > it1-out2.py
+	diff it1-out1.py it1-out2.py
+
+it1-out3.py: it1-out2.py it1-in.lang0
+	cat it1-in.lang0 | python3 it1-out2.py > it1-out3.py
+	diff it1-out2.py it1-out3.py
+
+it1-out.py: it1-out3.py
+	cp it1-out3.py it1-out.py
+
+
+
+it2-out0.py: it1-out.py it2-in.lang0
+	cat it2-in.lang0 | python3 it1-out.py > it2-out0.py
+
+# No gcc step since the target is still python here
+
+it2-out1.c: it2-out0.py it2-in.lang0
+	cat it2-in.lang0 | python3 it2-out0.py > $@
+# 	diff it2-out0.py it2-out1.py Do not diff - the target changed so the output will be different
+
+it2-out1: it2-out1.c
+	gcc $^ -o $@ $(GCC_FLAGS)
+
+it2-out2.c: it2-out1 it2-in.lang0
+	cat it2-in.lang0 | ./it2-out1 > $@
+	diff it2-out1.c $@
+
+it2-out2: it2-out2.c
+	gcc $^ -o $@ $(GCC_FLAGS)
+
+it2-out3.c: it2-out2 it2-in.lang0
+	cat it2-in.lang0 | ./it2-out2 > it2-out3.c
+	diff it2-out2.c it2-out3.c
+
+it2-out3: it2-out3.c
+	gcc $^ -o $@ $(GCC_FLAGS)
+
+it2-out: it2-out3
+	cp it2-out3 it2-out
+
+
+
+it3-out0.c: it2-out it3-in.lang0
+	cat it3-in.lang0 | ./it2-out > it3-out0.c
+
+# gcc step since the target is still python here
+it3-out0: it3-out0.c
+	gcc $^ -o $@ $(GCC_FLAGS)
+
+it3-out1.ll: it3-out0 it3-in.lang0
+	cat it3-in.lang0 | ./it3-out0 > $@
+
+it3-out1.s: it3-out1.ll
+	llc $^ -o $@
+
+
+
+foo.ll: foo.c
+	clang -S -emit-llvm $^
+
+foo.s: foo.ll
+	llc $^
+
+foo: foo.s
+	clang $^ -o $@
 
 clean:
-	$(MAKE) -C 0-lang0py clean
+	-rm it1-out* it2-out*
-	$(MAKE) -C 1-lang0py clean
-	$(MAKE) -C 2-lang0c clean
-	$(MAKE) -C tests clean

README.md

@@ -49,32 +49,6 @@ Indentation is done using tabs.
 
 ### Parsing
 
-#### Pre declaration (functions)
-
-Functions need to be pre-declared if you intend to use them before you have defined them:
-
-```
-func result/
-
-...
-
-func result:
-	return result
-/
-```
-
-#### Pre declaration (variables)
-
-Variables will need to be declared before you can use them:
-
-```
-func:
-	declare result
-	set result "Result"
-	return result
-/
-```
-
 ### Variables
 
 #### calc var func args*
@@ -95,10 +69,6 @@ Sets var to "const".
 
 Exits the deepest `forever` loop.
 
-#### func args*
-
-Calls the function name `func` with the given arguments. The result, if any, is ignored.
-
 #### if arg
 
 Evaluates arg. If found to be true, descends in the block. Otherwise, skips the block
@@ -111,13 +81,27 @@ Repeats the block until `break`  or `return` is called.
 
 Returns the given value. You can not give an argument if your function is never used in `call`.
 
+#### func args*
+
+Calls the given function with the given arguments. The result, if any, is ignored.
+
 ### Builtins
 
 #### trace
 
 Writes the name and value of the variable passed to stderr if the TRACE environment variable is set.
 
-### Standard library functions
+#### Standard library functions
+
+#### eq a b
+
+Return true if the given strings are the same.
+
+#### lt a b
+
+`a` and `b` are expected to have length 1.
+
+Return true if a would sort before b.
 
 #### addstringchar a b
 
@@ -129,9 +113,9 @@ Creates a new string with `b` appended to `a`.
 
 Writes the given string to standard output.
 
-#### eq a b
+#### fileget path
 
-Return true if the given strings are the same.
+Reads a file named `path` from the current directory into a string.
 
 #### intinc a
 
@@ -140,12 +124,6 @@ Available in it2 runtime and onwards.
 Interprets string `a` as an integer, increases it by one and returns it (as a string).
 If `a` cannot be interpreted as an integer, or has additional bytes, this function returns 1.
 
-#### lt a b
-
-`a` and `b` are expected to have length 1.
-
-Return true if a would sort before b.
-
 #### mapclear mapname
 
 Available in it2 runtime and onwards.

it0-in-footer.py

@@ -0,0 +1,2 @@
+if __name__ == '__main__':
+    main()

it0-in-header.py

@@ -0,0 +1,51 @@
+import os
+import sys
+
+def eq(a, b):
+    return a == b
+
+def lt(a, b):
+    return a[0] < b[0]
+
+def addstringchar(a, b):
+    return a + b[0]
+
+def emit(string):
+    sys.stdout.write(string)
+
+def trace(header, value):
+    if os.environ.get('TRACE'):
+        sys.stderr.write(f'{header}={value!r}\\n')
+
+eof = chr(0)
+eol = chr(10)
+quote = chr(34)
+PEEK = None
+LINE = 1
+
+def peek():
+    global PEEK
+    if PEEK is None:
+        char = sys.stdin.read(1)
+        trace('char', char)
+        if not char:
+            PEEK = eof
+        else:
+            PEEK = char
+    return PEEK
+
+def skip():
+    global LINE
+    global PEEK
+    if eol == PEEK:
+        LINE += 1
+    PEEK = None
+
+def skipchar(char):
+    global LINE
+    assert char == peek(), (LINE, char, peek())
+    skip()
+
+def fileget(path):
+    with open(f'./{path}', encoding='ASCII') as fil:
+        return fil.read()

it0-out.py

@@ -27,8 +27,6 @@ def peek():
 
     return PEEK
 
-peek()
-
 def skip():
     global LINE
     global PEEK
@@ -43,9 +41,9 @@ def skipchar(char):
     assert char == peek(), (LINE, char, peek())
     skip()
 
-def emitln(data):
+def fileget(path):
-    emit(data)
+    with open(f'./{path}', encoding='ASCII') as fil:
-    emit(eol)
+        return fil.read()
 
 def lexident():
     word = ''
@@ -139,21 +137,21 @@ def parsestatif(indent):
     emit('    ' * indent)
     emit('if ')
     parseexprvarref()
-    emitln(':')
+    emit(':\n')
     skipchar(eol)
 
     parseblock(indent + 1)
 
 def parsestatforever(indent):
     emit('    ' * indent)
-    emitln('while True:')
+    emit('while True:\n')
     skipchar(eol)
 
     parseblock(indent + 1)
 
 def parsestatbreak(indent):
     emit('    ' * indent)
-    emitln('break')
+    emit('break\n')
     skipchar(eol)
 
 def parsestatreturn(indent):
@@ -176,7 +174,7 @@ def parsestattrace(indent):
     emit(var_name)
     emit('", ')
     emit(var_name)
-    emitln(')')
+    emit(')\n')
 
 def parsestat(indent):
     call = lexident()
@@ -231,7 +229,7 @@ def parsestat(indent):
 
     skipchar(eol)
 
-    emitln(')')
+    emit(')\n')
 
 def parseblock(indent):
     while True:
@@ -271,75 +269,27 @@ def parsefunc():
         # Ahead declaration
         skipchar('/')
         skipchar(eol)
-        emitln("):")
+        emit("):\n")
-        emitln("    pass # ahead declaration")
+        emit("    pass # ahead declaration\n")
-        emit(eol)
+        emit("\n")
         return
 
     skipchar(':')
     skipchar(eol)
 
-    emitln('):')
+    emit('):\n')
 
     parseblock(1)
 
-    emit(eol)
+    emit("\n")
 
 def emitheader():
-    emitln("import os")
+    header = fileget("it0-in-header.py")
-    emitln("import sys")
+    emit(header)
-    emitln("")
-    emitln("def eq(a, b):")
-    emitln("    return a == b")
-    emitln("")
-    emitln("def lt(a, b):")
-    emitln("    return a[0] < b[0]")
-    emitln("")
-    emitln("def addstringchar(a, b):")
-    emitln("    return a + b[0]")
-    emitln("")
-    emitln("def emit(string):")
-    emitln("    sys.stdout.write(string)")
-    emitln("")
-    emitln("def trace(header, value):")
-    emitln("    if os.environ.get('TRACE'):")
-    emitln("        sys.stderr.write(f'{header}={value!r}\\n')")
-    emitln("")
-    emitln("eof = chr(0)")
-    emitln("eol = chr(10)")
-    emitln("quote = chr(34)")
-    emitln("PEEK = None")
-    emitln("LINE = 1")
-    emitln("")
-    emitln("def peek():")
-    emitln("    global PEEK")
-    emitln("    if PEEK is None:")
-    emitln("        char = sys.stdin.read(1)")
-    emitln("        trace('char', char)")
-    emitln("        if not char:")
-    emitln("            PEEK = eof")
-    emitln("        else:")
-    emitln("            PEEK = char")
-    emitln("    return PEEK")
-    emitln("")
-    emitln("peek()")
-    emitln("")
-    emitln("def skip():")
-    emitln("    global LINE")
-    emitln("    global PEEK")
-    emitln("    if eol == PEEK:")
-    emitln("        LINE += 1")
-    emitln("    PEEK = None")
-    emitln("")
-    emitln("def skipchar(char):")
-    emitln("    global LINE")
-    emitln("    assert char == peek(), (LINE, char, peek())")
-    emitln("    skip()")
-    emitln("")
 
 def emitfooter():
-    emit("if __name__ == '__main__':\n")
+    footer = fileget("it0-in-footer.py")
-    emit("    main()\n")
+    emit(footer)
 
 def main():
     emitheader()

it1-in-footer.py

@@ -0,0 +1,2 @@
+if __name__ == '__main__':
+    main()

it1-in-header.py

@@ -0,0 +1,51 @@
+import os
+import sys
+
+def eq(a, b):
+    return a == b
+
+def lt(a, b):
+    return a[0] < b[0]
+
+def addstringchar(a, b):
+    return a + b[0]
+
+def emit(string):
+    sys.stdout.write(string)
+
+def trace(header, value):
+    if os.environ.get('TRACE'):
+        sys.stderr.write(f'{header}={value!r}\\n')
+
+eof = chr(0)
+eol = chr(10)
+quote = chr(34)
+PEEK = None
+LINE = 1
+
+def peek():
+    global PEEK
+    if PEEK is None:
+        char = sys.stdin.read(1)
+        trace('char', char)
+        if not char:
+            PEEK = eof
+        else:
+            PEEK = char
+    return PEEK
+
+def skip():
+    global LINE
+    global PEEK
+    if eol == PEEK:
+        LINE += 1
+    PEEK = None
+
+def skipchar(char):
+    global LINE
+    assert char == peek(), (LINE, char, peek())
+    skip()
+
+def fileget(path):
+    with open(f'./{path}', encoding='ASCII') as fil:
+        return fil.read()

it1-in.lang0

@@ -1,8 +1,3 @@
-emitln data:
-	emit data
-	emit eol
-/
-
 increaseindent indent:
 	calc indent addstringchar indent " "
 	calc indent addstringchar indent " "
@@ -124,7 +119,7 @@ parsestatif indent:
 	emit indent
 	emit "if "
 	parseexprvarref
-	emitln ":"
+	emit ":\n"
 	skipchar eol
 	calc indent increaseindent indent
 	parseblock indent
@@ -132,7 +127,7 @@ parsestatif indent:
 
 parsestatforever indent:
 	emit indent
-	emitln "while True:"
+	emit "while True:\n"
 	skipchar eol
 	calc indent increaseindent indent
 	parseblock indent
@@ -140,7 +135,7 @@ parsestatforever indent:
 
 parsestatbreak indent:
 	emit indent
-	emitln "break"
+	emit "break\n"
 	skipchar eol
 /
 
@@ -167,7 +162,7 @@ parsestattrace indent:
 	emit quote
 	emit ", "
 	emit varname
-	emitln ")"
+	emit ")\n"
 	skipchar eol
 /
 
@@ -243,7 +238,7 @@ parsestat indent:
 		set first "0"
 	/
 	skipchar eol
-	emitln ")"
+	emit ")\n"
 /
 
 parseblock indent:
@@ -312,74 +307,26 @@ parsefunc:
 	if iseoblock
 		skipchar "/"
 		skipchar eol
-		emitln "):"
+		emit "):\n"
-		emitln "    pass # ahead declaration"
+		emit "    pass # ahead declaration\n"
-		emit eol
+		emit "\n"
 		return
 	/
 	skipchar ":"
 	skipchar eol
-	emitln "):"
+	emit "):\n"
 	parseblock "    "
-	emit eol
+	emit "\n"
 /
 
 emitheader:
-	emitln "import os"
+	calc header fileget "it1-in-header.py"
-	emitln "import sys"
+	emit header
-	emitln ""
-	emitln "def eq(a, b):"
-	emitln "    return a == b"
-	emitln ""
-	emitln "def lt(a, b):"
-	emitln "    return a[0] < b[0]"
-	emitln ""
-	emitln "def addstringchar(a, b):"
-	emitln "    return a + b[0]"
-	emitln ""
-	emitln "def emit(string):"
-	emitln "    sys.stdout.write(string)"
-	emitln ""
-	emitln "def trace(header, value):"
-	emitln "    if os.environ.get('TRACE'):"
-	emitln "        sys.stderr.write(f'{header}={value!r}\')"
-	emitln ""
-	emitln "eof = chr(0)"
-	emitln "eol = chr(10)"
-	emitln "quote = chr(34)"
-	emitln "PEEK = None"
-	emitln "LINE = 1"
-	emitln ""
-	emitln "def peek():"
-	emitln "    global PEEK"
-	emitln "    if PEEK is None:"
-	emitln "        char = sys.stdin.read(1)"
-	emitln "        trace('char', char)"
-	emitln "        if not char:"
-	emitln "            PEEK = eof"
-	emitln "        else:"
-	emitln "            PEEK = char"
-	emitln "    return PEEK"
-	emitln ""
-	emitln "peek()"
-	emitln ""
-	emitln "def skip():"
-	emitln "    global LINE"
-	emitln "    global PEEK"
-	emitln "    if eol == PEEK:"
-	emitln "        LINE += 1"
-	emitln "    PEEK = None"
-	emitln ""
-	emitln "def skipchar(char):"
-	emitln "    global LINE"
-	emitln "    assert char == peek(), (LINE, char, peek())"
-	emitln "    skip()"
-	emitln ""
 /
 
 emitfooter:
-	emitln "if __name__ == '__main__':"
+	calc header fileget "it1-in-footer.py"
-	emitln "    main()"
+	emit header
 /
 
 main:

it2-in-header.c

@@ -0,0 +1,136 @@
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+
+char var_eof[2] = {-1, 0};
+char var_eol[2] = {10, 0};
+char var_quote[2] = {34, 0};
+char var_false[1] = {0};
+char var_true[2] = {'1', 0};
+
+
+char * eq(char * a, char * b)
+{
+    return (strcmp(a, b) == 0) ? var_true : var_false;
+}
+
+char * lt(char * a, char * b)
+{
+    return (strcmp(a, b) < 0) ? var_true : var_false;
+}
+char * not(char * a)
+{
+    return (strcmp(a, var_true) != 0) ? var_true : var_false;
+}
+
+char * addstringchar(char * str, char * chr)
+{
+    int str_len = strlen(str);
+    assert(strlen(chr) == 1);
+    char * res = malloc((str_len + 2) * sizeof(char));
+    strcpy(res, str);
+    res[str_len + 0] = chr[0];
+    res[str_len + 1] = 0;
+    return res;
+}
+
+char * emit(char * str)
+{
+    fputs(str, stdout);
+    return 0;
+}
+
+char * trace(char * var_name, char * var_value)
+{
+    const char * env_trace = getenv("TRACE");
+    if( !env_trace ) return 0;
+    fputs(var_name, stderr);
+    fputs("=", stderr);
+    fputs(var_value, stderr);
+    fputs(var_eol, stderr);
+    return 0;
+}
+
+int LINE = 1;
+
+char * peek()
+{
+    char * res = malloc(2*sizeof(char));
+    res[0] = getc(stdin);
+    res[1] = 0;
+    ungetc(res[0], stdin);
+    return res;
+}
+
+void skip()
+{
+    char c = getc(stdin);
+    if( c == 10 ) LINE += 1;
+}
+
+void skipchar(char * chr)
+{
+    assert(strlen(chr) == 1);
+    char * act = peek();
+    assert(strlen(act) == 1);
+    if( chr[0] == act[0] ) {skip(); return;};
+    fprintf(stderr, "Expected '%c' on line %d but saw '%c' instead\n", chr[0], LINE, act[0]);
+    exit(1);
+}
+
+char * fileget(char * var_path)
+{
+	FILE * file_ptr;
+	int file_size;
+	char * res;
+
+	file_ptr = fopen(var_path, "r");
+	if( NULL == file_ptr ) {
+	    fprintf(stderr, "Could not load file %s", var_path);
+    	exit(1);
+	}
+
+	fseek(file_ptr, 0, SEEK_END);
+	file_size = ftell(file_ptr);
+	fseek(file_ptr, 0, SEEK_SET);
+
+	res = malloc(file_size * sizeof(char));
+	fread(res, sizeof(char), file_size, file_ptr);
+
+	fclose(file_ptr);
+	return res;
+}
+
+void mapclear(char * map_name)
+{
+
+}
+
+void mapsetkey(char * map_name, char * key, char * value)
+{
+
+}
+
+char * mapgetkey(char * map_name, char * key)
+{
+	return "0";
+}
+
+char * intinc(char * a)
+{
+	int len = strlen(a);
+	int val;
+	int read = sscanf(a, "%d", &val);
+	if( len != read ) {
+		return "1";
+	}
+
+	val += 1;
+
+	char * res = malloc((len + 1) * sizeof(char));
+	sprintf(res, "%d", val);
+
+	return res;
+}

it2-in.lang0

@@ -1,8 +1,3 @@
-emitln data:
-	emit data
-	emit eol
-/
-
 increaseindent indent:
 	calc indent addstringchar indent " "
 	calc indent addstringchar indent " "
@@ -160,34 +155,34 @@ parsestatif indent:
 	emit indent
 	emit "if ( 0 < strlen("
 	parseexprvarref
-	emitln ") )"
+	emit ") )\n"
 	emit indent
-	emitln "{"
+	emit "{\n"
 	skipchar eol
 	calc indentt increaseindent indent
 	parseblock indentt
 	emit indent
-	emitln "}"
+	emit "}\n"
 	return
 /
 
 parsestatforever indent:
 	declare indentt
 	emit indent
-	emitln "while (1)"
+	emit "while (1)\n"
 	emit indent
-	emitln "{"
+	emit "{\n"
 	skipchar eol
 	calc indentt increaseindent indent
 	parseblock indentt
 	emit indent
-	emitln "}"
+	emit "}\n"
 	return
 /
 
 parsestatbreak indent:
 	emit indent
-	emitln "break;"
+	emit "break;\n"
 	skipchar eol
 	return
 /
@@ -225,7 +220,7 @@ parsestattrace indent:
 	emit quote
 	emit ", var_"
 	emit varname
-	emitln ");"
+	emit ");\n"
 	skipchar eol
 	return
 /
@@ -295,6 +290,11 @@ parsestat indent:
 			break
 		/
 		skip
+		calc isfirst eq first "1"
+		calc isnotfirst not isfirst
+		if isnotfirst
+			emit ", "
+		/
 		calc char peek
 		calc isquote eq char quote
 		calc isnotquote not isquote
@@ -304,15 +304,10 @@ parsestat indent:
 		if isnotquote
 			parseexprvarref
 		/
-		calc isfirst eq first "1"
-		calc isnotfirst not isfirst
-		if isnotfirst
-			emit ", "
-		/
 		set first "0"
 	/
 	skipchar eol
-	emitln ");"
+	emit ");\n"
 	return
 /
 
@@ -394,119 +389,26 @@ parsefunc:
 	if iseoblock
 		skipchar "/"
 		skipchar eol
-		emitln ");"
+		emit ");"
+		emit "\n"
 		return
 	/
 	skipchar ":"
 	skipchar eol
-	emitln ")"
+	emit ")\n{\n"
-	emitln "{"
 	parseblock "    "
-	emitln "}"
+	emit "}\n\n"
-	emit eol
 	return
 /
 
 emitheader:
-	emitln "#include <assert.h>"
+	declare header
-	emitln "#include <stdio.h>"
+	calc header fileget "it2-in-header.c"
-	emitln "#include <stdlib.h>"
+	emit header
-	emitln "#include <string.h>"
-	emitln ""
-	emitln ""
-	emitln "char var_eof[2] = {-1, 0};"
-	emitln "char var_eol[2] = {10, 0};"
-	emitln "char var_quote[2] = {34, 0};"
-	emitln "char var_false[1] = {0};"
-	emitln "char var_true[2] = {'1', 0};"
-	emitln ""
-	emitln ""
-	emitln "char * eq(char * a, char * b)"
-	emitln "{"
-	emitln "    return (strcmp(a, b) == 0) ? var_true : var_false;"
-	emitln "}"
-	emitln ""
-	emitln "char * lt(char * a, char * b)"
-	emitln "{"
-	emitln "    return (strcmp(a, b) < 0) ? var_true : var_false;"
-	emitln "}"
-	emitln "char * not(char * a)"
-	emitln "{"
-	emitln "    return (strcmp(a, var_true) != 0) ? var_true : var_false;"
-	emitln "}"
-	emitln ""
-	emitln "char * addstringchar(char * str, char * chr)"
-	emitln "{"
-	emitln "    int str_len = strlen(str);"
-	emitln "    assert(strlen(chr) == 1);"
-	emitln "    char * res = malloc((str_len + 2) * sizeof(char));"
-	emitln "    strcpy(res, str);"
-	emitln "    res[str_len + 0] = chr[0];"
-	emitln "    res[str_len + 1] = 0;"
-	emitln "    return res;"
-	emitln "}"
-	emitln ""
-	emitln "char * emit(char * str)"
-	emitln "{"
-	emitln "    fputs(str, stdout);"
-	emitln "    return 0;"
-	emitln "}"
-	emitln ""
-	emitln "char * trace(char * var_name, char * var_value)"
-	emitln "{"
-	emit "    const char * env_trace = getenv("
-	emit quote
-	emit "TRACE"
-	emit quote
-	emitln ");"
-	emitln "    if( !env_trace ) return 0;"
-	emitln "    fputs(var_name, stderr);"
-	emit "    fputs("
-	emit quote
-	emit "="
-	emit quote
-	emitln ", stderr);"
-	emitln "    fputs(var_value, stderr);"
-	emitln "    fputs(var_eol, stderr);"
-	emitln "    return 0;"
-	emitln "}"
-	emitln ""
-	emitln "int LINE = 1;"
-	emitln ""
-	emitln "char * peek()"
-	emitln "{"
-	emitln "    char * res = malloc(2*sizeof(char));"
-	emitln "    res[0] = getc(stdin);"
-	emitln "    res[1] = 0;"
-	emitln "    ungetc(res[0], stdin);"
-	emitln "    return res;"
-	emitln "}"
-	emitln ""
-	emitln "void skip()"
-	emitln "{"
-	emitln "    char c = getc(stdin);"
-	emitln "    if( c == 10 ) LINE += 1;"
-	emitln "}"
-	emitln ""
-	emitln "void skipchar(char * chr)"
-	emitln "{"
-	emitln "    assert(strlen(chr) == 1);"
-	emitln "    char * act = peek();"
-	emitln "    assert(strlen(act) == 1);"
-	emitln "    if( chr[0] == act[0] ) {skip(); return;};"
-	emit "    fprintf(stderr, "
-	emit quote
-	emit "Expected '%c' on line %d but saw '%c' instead%c"
-	emit quote
-	emitln ", chr[0], LINE, act[0], 10);"
-	emitln "    exit(1);"
-	emitln "}"
-	emitln ""
 	return
 /
 
 emitfooter:
-	emit ""
 	return
 /
 

t-diagram.excalidraw

@@ -9,7 +9,7 @@
       "x": 725,
       "y": 306,
       "width": 197,
-      "height": 60,
+      "height": 76,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -25,8 +25,8 @@
         "type": 3
       },
       "seed": 902003894,
-      "version": 30,
+      "version": 28,
-      "versionNonce": 882148575,
+      "versionNonce": 1349374006,
       "isDeleted": false,
       "boundElements": [
         {
@@ -34,16 +34,16 @@
           "id": "vC6ze8D2C_8xamOti_FDo"
         }
       ],
-      "updated": 1738501880052,
+      "updated": 1736684246699,
       "link": null,
       "locked": false
     },
     {
       "id": "vC6ze8D2C_8xamOti_FDo",
       "type": "text",
-      "x": 734.580078125,
+      "x": 752.9500732421875,
-      "y": 311,
+      "y": 319,
-      "width": 177.83984375,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -58,20 +58,20 @@
       "index": "a0V",
       "roundness": null,
       "seed": 1788670826,
-      "version": 31,
+      "version": 19,
-      "versionNonce": 1178825919,
+      "versionNonce": 1785814954,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738501880052,
+      "updated": 1736684250287,
       "link": null,
       "locked": false,
-      "text": "0-lang0py/lang0py\n(hand written)",
+      "text": "it0-out.py\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "sa5DlHhxpJaKEJJQyQzX0",
-      "originalText": "0-lang0py/lang0py\n(hand written)",
+      "originalText": "it0-out.py\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -133,7 +133,7 @@
       "version": 68,
       "versionNonce": 1195221302,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684348736,
       "link": null,
       "locked": false,
@@ -205,7 +205,7 @@
       "version": 482,
       "versionNonce": 2052650218,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684934138,
       "link": null,
       "locked": false,
@@ -277,7 +277,7 @@
       "version": 115,
       "versionNonce": 1274068970,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684445213,
       "link": null,
       "locked": false,
@@ -349,7 +349,7 @@
       "version": 179,
       "versionNonce": 2088933354,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684949700,
       "link": null,
       "locked": false,
@@ -421,7 +421,7 @@
       "version": 219,
       "versionNonce": 600803830,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684961559,
       "link": null,
       "locked": false,
@@ -493,7 +493,7 @@
       "version": 529,
       "versionNonce": 1524384362,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684934138,
       "link": null,
       "locked": false,
@@ -565,7 +565,7 @@
       "version": 580,
       "versionNonce": 973746154,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684934138,
       "link": null,
       "locked": false,
@@ -637,7 +637,7 @@
       "version": 628,
       "versionNonce": 632995178,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684934138,
       "link": null,
       "locked": false,
@@ -689,9 +689,9 @@
     {
       "id": "wbK8T0IJWC6QMWKFsflZU",
       "type": "text",
-      "x": 593.7700576782227,
+      "x": 593.9500732421875,
       "y": 135,
-      "width": 141.4598846435547,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -706,20 +706,20 @@
       "index": "a0l",
       "roundness": null,
       "seed": 864846774,
-      "version": 145,
+      "version": 138,
-      "versionNonce": 1419718257,
+      "versionNonce": 1358166378,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502492344,
+      "updated": 1736684351221,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py0.lang0",
+      "text": "it1-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "JpWSt6KcCpoXnoEq_GCJp",
-      "originalText": "1-lang0py/\nlang0py0.lang0",
+      "originalText": "it1-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -761,9 +761,9 @@
     {
       "id": "Mj0dEWiGr1Z9qT8mn8V3K",
       "type": "text",
-      "x": 1361.7000579833984,
+      "x": 1356.4500732421875,
       "y": 132.5,
-      "width": 130.59988403320312,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -778,20 +778,20 @@
       "index": "a0l2",
       "roundness": null,
       "seed": 779040554,
-      "version": 565,
+      "version": 554,
-      "versionNonce": 874960209,
+      "versionNonce": 365292266,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502506673,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c0.lang0",
+      "text": "it2-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "xdt3-HzXEKTWxrWigJjiT",
-      "originalText": "2-lang0c/\nlang0c0.lang0",
+      "originalText": "it2-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -833,9 +833,9 @@
     {
       "id": "5pAueU5y4qXjdgix_f5pa",
       "type": "text",
-      "x": 768.7700576782227,
+      "x": 768.9500732421875,
       "y": -61,
-      "width": 141.4598846435547,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -850,20 +850,20 @@
       "index": "a0l8",
       "roundness": null,
       "seed": 471340598,
-      "version": 243,
+      "version": 242,
-      "versionNonce": 896719295,
+      "versionNonce": 645687542,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502495388,
+      "updated": 1736684455955,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py0.lang0",
+      "text": "it1-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "Vi9eTOIjQtbNC7zF_5rwS",
-      "originalText": "1-lang0py/\nlang0py0.lang0",
+      "originalText": "it1-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -905,9 +905,9 @@
     {
       "id": "hOjP8z6dti8Z5hpgB3d5b",
       "type": "text",
-      "x": 903.7700576782227,
+      "x": 903.9500732421875,
       "y": -252.25,
-      "width": 141.4598846435547,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -922,20 +922,20 @@
       "index": "a0l8G",
       "roundness": null,
       "seed": 1843097770,
-      "version": 309,
+      "version": 308,
-      "versionNonce": 1367318047,
+      "versionNonce": 1508581622,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502496300,
+      "updated": 1736684957255,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py0.lang0",
+      "text": "it1-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "nq35O_LXfbGnImWL9Qc06",
-      "originalText": "1-lang0py/\nlang0py0.lang0",
+      "originalText": "it1-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -977,9 +977,9 @@
     {
       "id": "P9GsVng_mlohB8reiaQaw",
       "type": "text",
-      "x": 1042.5200576782227,
+      "x": 1042.7000732421875,
       "y": -443.5,
-      "width": 141.4598846435547,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -994,20 +994,20 @@
       "index": "a0l8O",
       "roundness": null,
       "seed": 1003079478,
-      "version": 349,
+      "version": 348,
-      "versionNonce": 63585919,
+      "versionNonce": 1453458550,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502497243,
+      "updated": 1736684961559,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py0.lang0",
+      "text": "it1-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "sm_C3kQH3NnoN8GY0WsHa",
-      "originalText": "1-lang0py/\nlang0py0.lang0",
+      "originalText": "it1-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1049,9 +1049,9 @@
     {
       "id": "ypQvCIgox5Ez78rMw8nJk",
       "type": "text",
-      "x": 1536.7000579833984,
+      "x": 1531.4500732421875,
       "y": -62.5,
-      "width": 130.59988403320312,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -1066,20 +1066,20 @@
       "index": "a0lC",
       "roundness": null,
       "seed": 1922220522,
-      "version": 660,
+      "version": 659,
-      "versionNonce": 1720655071,
+      "versionNonce": 1812183146,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502509525,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c0.lang0",
+      "text": "it2-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "FkKqusUxwu0Fdxigv0fZW",
-      "originalText": "2-lang0c/\nlang0c0.lang0",
+      "originalText": "it2-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1121,9 +1121,9 @@
     {
       "id": "5JR6I1qRvymfZUCUFUEiC",
       "type": "text",
-      "x": 1698.7000579833984,
+      "x": 1693.4500732421875,
       "y": -248.5,
-      "width": 130.59988403320312,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -1138,20 +1138,20 @@
       "index": "a0lE",
       "roundness": null,
       "seed": 887058026,
-      "version": 721,
+      "version": 720,
-      "versionNonce": 1934701887,
+      "versionNonce": 1951147498,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502510388,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c0.lang0",
+      "text": "it2-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "EIr70q6Ecsh_k_mhXX_d1",
-      "originalText": "2-lang0c/\nlang0c0.lang0",
+      "originalText": "it2-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1193,9 +1193,9 @@
     {
       "id": "2mQPed9SFteJcR4z6zGyt",
       "type": "text",
-      "x": 1808.7000579833984,
+      "x": 1803.4500732421875,
       "y": -429.5,
-      "width": 130.59988403320312,
+      "width": 141.099853515625,
       "height": 50,
       "angle": 0,
       "strokeColor": "#1e1e1e",
@@ -1210,20 +1210,20 @@
       "index": "a0lF",
       "roundness": null,
       "seed": 1202851626,
-      "version": 769,
+      "version": 768,
-      "versionNonce": 1994500511,
+      "versionNonce": 1685533546,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502511204,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c0.lang0",
+      "text": "it2-in.lang0\n(hand written)",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "P5YHIvfxndgZtpw2M194q",
-      "originalText": "2-lang0c/\nlang0c0.lang0",
+      "originalText": "it2-in.lang0\n(hand written)",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1233,7 +1233,7 @@
       "x": 876,
       "y": 121,
       "width": 195.0000000000001,
-      "height": 60,
+      "height": 74.99999999999999,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -1249,8 +1249,8 @@
         "type": 3
       },
       "seed": 1738165110,
-      "version": 322,
+      "version": 320,
-      "versionNonce": 348133425,
+      "versionNonce": 242867434,
       "isDeleted": false,
       "boundElements": [
         {
@@ -1258,17 +1258,17 @@
           "type": "text"
         }
       ],
-      "updated": 1738501921397,
+      "updated": 1736684364282,
       "link": null,
       "locked": false
     },
     {
       "id": "MFQOMZ3Q8GWnWIOy737f6",
       "type": "text",
-      "x": 911.3100509643555,
+      "x": 920.2900619506836,
-      "y": 126,
+      "y": 146,
-      "width": 124.37989807128906,
+      "width": 106.41987609863281,
-      "height": 50,
+      "height": 25,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -1282,27 +1282,27 @@
       "index": "a0t",
       "roundness": null,
       "seed": 781897450,
-      "version": 341,
+      "version": 334,
-      "versionNonce": 722253937,
+      "versionNonce": 1304604586,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502436384,
+      "updated": 1736684364282,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py0.exe",
+      "text": "it1-out0.py",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "xhGx8DjmbBrbJtwOztMKw",
-      "originalText": "1-lang0py/\nlang0py0.exe",
+      "originalText": "it1-out0.py",
       "autoResize": true,
       "lineHeight": 1.25
     },
     {
       "id": "V4SlwrmLxEj5lu0skBUJ1",
       "type": "rectangle",
-      "x": 1636.8333333333335,
+      "x": 1638.5,
       "y": 118.5,
       "width": 195.0000000000001,
       "height": 74.99999999999999,
@@ -1321,8 +1321,8 @@
         "type": 3
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@@ -1330,17 +1330,17 @@
           "type": "text"
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-      "updated": 1738502399176,
+      "updated": 1736684934138,
       "link": null,
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@@ -1354,20 +1354,20 @@
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       "roundness": null,
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+      "boundElements": null,
-      "updated": 1738502474072,
+      "updated": 1736684934138,
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+      "text": "it2-out0.py",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "V4SlwrmLxEj5lu0skBUJ1",
-      "originalText": "2-lang0c/\nlang0c0.exe",
+      "originalText": "it2-out0.py",
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       "type": "text",
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+      "width": 102.47988891601562,
-      "height": 50,
+      "height": 25,
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@@ -1426,20 +1426,20 @@
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+      "version": 394,
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+      "versionNonce": 1445402998,
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-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502440183,
+      "updated": 1736684465162,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py1.exe",
+      "text": "it1-out1.py",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "q7GdmXdIkEVil1E7K3Vtv",
-      "originalText": "1-lang0py/\nlang0py1.exe",
+      "originalText": "it1-out1.py",
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       "lineHeight": 1.25
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@@ -1481,10 +1481,10 @@
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       "type": "text",
-      "x": 1178.550048828125,
+      "x": 1187.5300598144531,
-      "y": -255.75,
+      "y": -243.25,
-      "width": 125.89990234375,
+      "width": 107.93988037109375,
-      "height": 50,
+      "height": 25,
       "angle": 0,
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@@ -1498,20 +1498,20 @@
       "index": "a0u2",
       "roundness": null,
       "seed": 993774442,
-      "version": 466,
+      "version": 460,
-      "versionNonce": 407639167,
+      "versionNonce": 789420906,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502442119,
+      "updated": 1736684954094,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py2.exe",
+      "text": "it1-out2.py",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "4tXC4CO1352XEGgn5ZWPo",
-      "originalText": "1-lang0py/\nlang0py2.exe",
+      "originalText": "it1-out2.py",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1553,10 +1553,10 @@
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       "type": "text",
-      "x": 1324.3000411987305,
+      "x": 1327.2000579833984,
-      "y": -447,
+      "y": -434.5,
-      "width": 111.89991760253906,
+      "width": 106.09988403320312,
-      "height": 50,
+      "height": 25,
       "angle": 0,
       "strokeColor": "#1e1e1e",
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@@ -1570,20 +1570,20 @@
       "index": "a0u3",
       "roundness": null,
       "seed": 414675062,
-      "version": 507,
+      "version": 502,
-      "versionNonce": 47527537,
+      "versionNonce": 1109378358,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502444576,
+      "updated": 1736684963415,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py.exe",
+      "text": "it1-out3.py",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "_njzXhKgPzadFQfgDnI_E",
-      "originalText": "1-lang0py/\nlang0py.exe",
+      "originalText": "it1-out3.py",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1625,10 +1625,10 @@
     {
       "id": "-3hZTUkUzcwcd4qQ6tH9Q",
       "type": "text",
-      "x": 1530.5500411987305,
+      "x": 1533.4500579833984,
-      "y": 311.75,
+      "y": 324.25,
-      "width": 111.89991760253906,
+      "width": 106.09988403320312,
-      "height": 50,
+      "height": 25,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -1642,20 +1642,20 @@
       "index": "a0u8",
       "roundness": null,
       "seed": 1942100970,
-      "version": 527,
+      "version": 523,
-      "versionNonce": 1763250065,
+      "versionNonce": 1708469866,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502452896,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "1-lang0py/\nlang0py.exe",
+      "text": "it1-out3.py",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "ZjoMA7OeaNnjNpaVjFLsc",
-      "originalText": "1-lang0py/\nlang0py.exe",
+      "originalText": "it1-out3.py",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1697,10 +1697,10 @@
     {
       "id": "gSS5ui-65NHgMOUQh5qaI",
       "type": "text",
-      "x": 1814.2100448608398,
+      "x": 1820.8600616455078,
-      "y": -67,
+      "y": -54.5,
-      "width": 109.57991027832031,
+      "width": 96.27987670898438,
-      "height": 50,
+      "height": 25,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -1714,20 +1714,20 @@
       "index": "a0uV",
       "roundness": null,
       "seed": 2126958442,
-      "version": 771,
+      "version": 761,
-      "versionNonce": 1871453791,
+      "versionNonce": 1958222826,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502478104,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c1.exe",
+      "text": "it2-out1.c",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "_dSfxbsy4dHEcZZ5zwehT",
-      "originalText": "2-lang0c/\nlang0c1.exe",
+      "originalText": "it2-out1.c",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1769,10 +1769,10 @@
     {
       "id": "0RfiY6ME4YQvG93V4ZTf7",
       "type": "text",
-      "x": 1915.4800491333008,
+      "x": 1922.1300659179688,
-      "y": -246,
+      "y": -233.5,
-      "width": 115.03990173339844,
+      "width": 101.7398681640625,
-      "height": 50,
+      "height": 25,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -1786,20 +1786,20 @@
       "index": "a0uZ",
       "roundness": null,
       "seed": 1038423094,
-      "version": 832,
+      "version": 823,
-      "versionNonce": 606612113,
+      "versionNonce": 1725802858,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502480152,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c2.exe",
+      "text": "it2-out2.c",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "7AT_y3BQx_MTOK2YJ5gyT",
-      "originalText": "2-lang0c/\nlang0c2.exe",
+      "originalText": "it2-out2.c",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1841,10 +1841,10 @@
     {
       "id": "yJu3JDSgZH2EElzwcEo8a",
       "type": "text",
-      "x": 2037.4800415039062,
+      "x": 2038.050064086914,
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+      "y": -418.5,
-      "width": 101.0399169921875,
+      "width": 99.89987182617188,
-      "height": 50,
+      "height": 25,
       "angle": 0,
       "strokeColor": "#1e1e1e",
       "backgroundColor": "transparent",
@@ -1858,20 +1858,20 @@
       "index": "a0ub",
       "roundness": null,
       "seed": 1154290486,
-      "version": 868,
+      "version": 865,
-      "versionNonce": 1145930655,
+      "versionNonce": 69064426,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
-      "updated": 1738502483040,
+      "updated": 1736684934138,
       "link": null,
       "locked": false,
-      "text": "2-lang0c/\nlang0c.exe",
+      "text": "it2-out3.c",
       "fontSize": 20,
       "fontFamily": 5,
       "textAlign": "center",
       "verticalAlign": "middle",
       "containerId": "wtdGNdh8BUiQz-JxcpA_L",
-      "originalText": "2-lang0c/\nlang0c.exe",
+      "originalText": "it2-out3.c",
       "autoResize": true,
       "lineHeight": 1.25
     },
@@ -1900,7 +1900,7 @@
       "version": 59,
       "versionNonce": 2125545782,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684495257,
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@@ -1946,7 +1946,7 @@
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       "versionNonce": 1720455530,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684957255,
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@@ -1992,7 +1992,7 @@
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       "versionNonce": 1556910134,
       "isDeleted": false,
-      "boundElements": [],
+      "boundElements": null,
       "updated": 1736684961559,
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@@ -2038,7 +2038,7 @@
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@@ -2084,7 +2084,7 @@
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@@ -2130,7 +2130,7 @@
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tests/.gitignore

@@ -1 +0,0 @@
-/*.results

tests/Makefile

@@ -1,71 +0,0 @@
-.SUFFIXES:
-.PHONY: all clean
-
-PYVERSION=3.10
-PYPREFIX=/usr
-CYTHON=cython3
-CC=gcc
-
-TESTLIST=$(shell ls *.lang0 | sed 's/.lang0//')
-
-all: check
-
-check: all-it0.results all-it1.results all-it2.results
-	! grep -v 'Success' $^
-
-all-it0.results: $(addprefix build/,$(addsuffix .it0, $(TESTLIST)))
-	-rm -f $@
-	$(foreach test,$(TESTLIST), echo -n "$(test)   " >> $@; echo "Hello" | ./build/$(test).it0 >> $@ ; echo "" >> $@ ;)
-
-all-it1.results: $(addprefix build/,$(addsuffix .it1, $(TESTLIST)))
-	-rm -f $@
-	$(foreach test,$(TESTLIST), echo -n "$(test)   " >> $@; echo "Hello" | ./build/$(test).it1 >> $@ ; echo "" >> $@ ;)
-
-all-it2.results: $(addprefix build/,$(addsuffix .it2, $(TESTLIST)))
-	-rm -f $@
-	$(foreach test,$(TESTLIST), echo -n "$(test)   " >> $@; echo "Hello" | ./build/$(test).it2 >> $@ ; echo "" >> $@ ;)
-
-clean:
-	-rm -f *.results build/*.it0* build/*.it1* build/*.it2*
-
-###
-# it0
-
-build/%.it0.py: %.lang0 ../0-lang0py/lang0py.exe
-	cat $< | ../0-lang0py/lang0py.exe > $@
-
-build/%.it0.c: build/%.it0.py
-	$(CYTHON) -3 --embed -o $@ $^
-
-build/%.it0.o: build/%.it0.c
-	$(CC) -o $@ -c $^ -I$(PYPREFIX)/include/python$(PYVERSION)
-
-build/%.it0: build/%.it0.o
-	$(CC) -o $@ $^ -lpython$(PYVERSION)
-
-###
-# it1
-
-build/%.it1.py: %.lang0 ../1-lang0py/lang0py.exe
-	cat $< | ../1-lang0py/lang0py.exe > $@
-
-build/%.it1.c: build/%.it1.py
-	$(CYTHON) -3 --embed -o $@ $^
-
-build/%.it1.o: build/%.it1.c
-	$(CC) -o $@ -c $^ -I$(PYPREFIX)/include/python$(PYVERSION)
-
-build/%.it1: build/%.it1.o
-	$(CC) -o $@ $^ -lpython$(PYVERSION)
-
-###
-# it2
-
-build/%.it2.c: %.lang0 ../2-lang0c/lang0c.exe
-	cat $< | ../2-lang0c/lang0c.exe > $@
-
-build/%.it2.o: build/%.it2.c
-	$(CC) -o $@ -c $^ -I$(PYPREFIX)/include/python$(PYVERSION)
-
-build/%.it2: build/%.it2.o
-	$(CC) -o $@ $^ -lpython$(PYVERSION)

tests/build/.gitignore

@@ -1,11 +0,0 @@
-/*.it0
-/*.it0.c
-/*.it0.o
-/*.it0.py
-/*.it1
-/*.it1.c
-/*.it1.o
-/*.it1.py
-/*.it2
-/*.it2.c
-/*.it2.o

tests/flowbreak.lang0

@@ -1,6 +0,0 @@
-main:
-	forever
-		break
-	/
-	emit "Success"
-/

tests/flowcall.lang0

@@ -1,8 +0,0 @@
-func:
-	emit "Success"
-	return
-/
-
-main:
-	func
-/

tests/flowiffalse.lang0

@@ -1,8 +0,0 @@
-main:
-	declare bool
-	set bool ""
-	if bool
-		return
-	/
-	emit "Success"
-/

tests/flowiftrue.lang0

@@ -1,7 +0,0 @@
-main:
-	declare bool
-	set bool "1"
-	if bool
-		emit "Success"
-	/
-/

tests/flowreturnnothing.lang0

@@ -1,8 +0,0 @@
-func:
-	return
-/
-
-main:
-	func
-	emit "Success"
-/

tests/flowreturnvalue.lang0

@@ -1,11 +0,0 @@
-func:
-	declare result
-	set result "Success"
-	return result
-/
-
-main:
-	declare result
-	calc result func
-	emit result
-/

tests/parsingpredeclaredfunction.lang0

@@ -1,11 +0,0 @@
-func result/
-
-main:
-	declare result
-	calc result func "Success"
-	emit result
-/
-
-func result:
-	return result
-/

tests/stdlibaddstringchar.lang0

@@ -1,5 +0,0 @@
-main:
-	declare result
-	calc result addstringchar "Succes" "s"
-	emit result
-/

tests/stdlibemit.lang0

@@ -1,3 +0,0 @@
-main:
-	emit "Success"
-/

tests/stdlibeqfalse.lang0

@@ -1,8 +0,0 @@
-main:
-	declare bool
-	calc bool eq "1" "2"
-	if bool
-		return
-	/
-	emit "Success"
-/

tests/stdlibeqtrue.lang0

@@ -1,7 +0,0 @@
-main:
-	declare bool
-	calc bool eq "1" "1"
-	if bool
-		emit "Success"
-	/
-/

tests/stdlibltfalse.lang0

@@ -1,8 +0,0 @@
-main:
-	declare bool
-	calc bool lt "b" "a"
-	if bool
-		return
-	/
-	emit "Success"
-/

tests/stdliblttrue.lang0

@@ -1,7 +0,0 @@
-main:
-	declare bool
-	calc bool lt "a" "b"
-	if bool
-		emit "Success"
-	/
-/

tests/stdlibpeek.lang0

@@ -1,9 +0,0 @@
-main:
-	declare char
-	declare ish
-	calc char peek
-	calc ish eq char "H"
-	if ish
-		emit "Success"
-	/
-/

tests/stdlibskip.lang0

@@ -1,24 +0,0 @@
-main:
-	declare char
-	declare ish
-	declare iso
-	declare notish
-	declare notiso
-	skip
-	calc char peek
-	calc ish eq char "e"
-	calc notish not ish
-	if notish
-		return
-	/
-	skip
-	skip
-	skip
-	calc char peek
-	calc iso eq char "o"
-	calc notiso not iso
-	if notish
-		return
-	/
-	emit "Success"
-/

tests/variablescalc.lang0

@@ -1,9 +0,0 @@
-func result:
-	return result
-/
-
-main:
-	declare result
-	calc result func "Success"
-	emit result
-/

tests/variablesset.lang0

@@ -1,5 +0,0 @@
-main:
-	declare result
-	set result "Success"
-	emit result
-/