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check_ast_ch.cpp
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check_ast_ch.cpp
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#include "ast.h"
#include "ast_gen.h"
#include "parser.h"
void check_ast_ch(size_t& good, size_t& bad) {
AstGen::Gen const
x = Ast::Identifier("x"),
y = Ast::Identifier("y"),
z = Ast::Identifier("z");
#define CHECK_AST(expr, ast) ++(Parser::check_ast(expr, ast)?good:bad)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wlogical-not-parentheses"
#pragma GCC diagnostic ignored "-Wparentheses"
CHECK_AST(" -x:=( -y)<>z", -x=( -y)!=z);
CHECK_AST(" -x:= -(y)<>z", -x= -(y)!=z);
CHECK_AST("( -x):= -y<> +z", ( -x)= -y!= +z);
CHECK_AST("( -x:= -y)<> +z", ( -x= -y)!= +z);
CHECK_AST(" -(x):= -y<> +z", -(x)= -y!= +z);
CHECK_AST(" -(x:= -y)<> +z", -(x= -y)!= +z);
CHECK_AST(" -x:=( -y)<> +z", -x=( -y)!= +z);
CHECK_AST(" -x:= -(y)<> +z", -x= -(y)!= +z);
CHECK_AST("( -x):= -y<> -z", ( -x)= -y!= -z);
CHECK_AST("( -x:= -y)<> -z", ( -x= -y)!= -z);
CHECK_AST(" -(x):= -y<> -z", -(x)= -y!= -z);
CHECK_AST(" -(x:= -y)<> -z", -(x= -y)!= -z);
CHECK_AST(" -x:=( -y)<> -z", -x=( -y)!= -z);
CHECK_AST(" -x:= -(y)<> -z", -x= -(y)!= -z);
CHECK_AST("( -x):= -y<> not z", ( -x)= -y!= not z);
CHECK_AST("( -x:= -y)<> not z", ( -x= -y)!= not z);
CHECK_AST(" -(x):= -y<> not z", -(x)= -y!= not z);
CHECK_AST(" -(x:= -y)<> not z", -(x= -y)!= not z);
CHECK_AST(" -x:=( -y)<> not z", -x=( -y)!= not z);
CHECK_AST(" -x:= -(y)<> not z", -x= -(y)!= not z);
CHECK_AST("( -x):= not y<>z", ( -x)= not y!=z);
CHECK_AST("( -x:= not y)<>z", ( -x= not y)!=z);
CHECK_AST(" -(x):= not y<>z", -(x)= not y!=z);
CHECK_AST(" -(x:= not y)<>z", -(x= not y)!=z);
CHECK_AST(" -x:=( not y)<>z", -x=( not y)!=z);
CHECK_AST(" -x:= not (y)<>z", -x= not (y)!=z);
CHECK_AST("( -x):= not y<> +z", ( -x)= not y!= +z);
CHECK_AST("( -x:= not y)<> +z", ( -x= not y)!= +z);
CHECK_AST(" -(x):= not y<> +z", -(x)= not y!= +z);
CHECK_AST(" -(x:= not y)<> +z", -(x= not y)!= +z);
CHECK_AST(" -x:=( not y)<> +z", -x=( not y)!= +z);
CHECK_AST(" -x:= not (y)<> +z", -x= not (y)!= +z);
CHECK_AST("( -x):= not y<> -z", ( -x)= not y!= -z);
CHECK_AST("( -x:= not y)<> -z", ( -x= not y)!= -z);
CHECK_AST(" -(x):= not y<> -z", -(x)= not y!= -z);
CHECK_AST(" -(x:= not y)<> -z", -(x= not y)!= -z);
CHECK_AST(" -x:=( not y)<> -z", -x=( not y)!= -z);
CHECK_AST(" -x:= not (y)<> -z", -x= not (y)!= -z);
CHECK_AST("( -x):= not y<> not z", ( -x)= not y!= not z);
CHECK_AST("( -x:= not y)<> not z", ( -x= not y)!= not z);
CHECK_AST(" -(x):= not y<> not z", -(x)= not y!= not z);
CHECK_AST(" -(x:= not y)<> not z", -(x= not y)!= not z);
CHECK_AST(" -x:=( not y)<> not z", -x=( not y)!= not z);
CHECK_AST(" -x:= not (y)<> not z", -x= not (y)!= not z);
CHECK_AST("( not x):=y<>z", ( not x)=y!=z);
CHECK_AST("( not x:=y)<>z", ( not x=y)!=z);
CHECK_AST(" not (x):=y<>z", not (x)=y!=z);
CHECK_AST(" not (x:=y)<>z", not (x=y)!=z);
CHECK_AST(" not x:=(y)<>z", not x=(y)!=z);
CHECK_AST("( not x):=y<> +z", ( not x)=y!= +z);
CHECK_AST("( not x:=y)<> +z", ( not x=y)!= +z);
CHECK_AST(" not (x):=y<> +z", not (x)=y!= +z);
CHECK_AST(" not (x:=y)<> +z", not (x=y)!= +z);
CHECK_AST(" not x:=(y)<> +z", not x=(y)!= +z);
CHECK_AST("( not x):=y<> -z", ( not x)=y!= -z);
CHECK_AST("( not x:=y)<> -z", ( not x=y)!= -z);
CHECK_AST(" not (x):=y<> -z", not (x)=y!= -z);
CHECK_AST(" not (x:=y)<> -z", not (x=y)!= -z);
CHECK_AST(" not x:=(y)<> -z", not x=(y)!= -z);
CHECK_AST("( not x):=y<> not z", ( not x)=y!= not z);
CHECK_AST("( not x:=y)<> not z", ( not x=y)!= not z);
CHECK_AST(" not (x):=y<> not z", not (x)=y!= not z);
CHECK_AST(" not (x:=y)<> not z", not (x=y)!= not z);
CHECK_AST(" not x:=(y)<> not z", not x=(y)!= not z);
CHECK_AST("( not x):= +y<>z", ( not x)= +y!=z);
CHECK_AST("( not x:= +y)<>z", ( not x= +y)!=z);
CHECK_AST(" not (x):= +y<>z", not (x)= +y!=z);
CHECK_AST(" not (x:= +y)<>z", not (x= +y)!=z);
CHECK_AST(" not x:=( +y)<>z", not x=( +y)!=z);
CHECK_AST(" not x:= +(y)<>z", not x= +(y)!=z);
CHECK_AST("( not x):= +y<> +z", ( not x)= +y!= +z);
CHECK_AST("( not x:= +y)<> +z", ( not x= +y)!= +z);
CHECK_AST(" not (x):= +y<> +z", not (x)= +y!= +z);
CHECK_AST(" not (x:= +y)<> +z", not (x= +y)!= +z);
CHECK_AST(" not x:=( +y)<> +z", not x=( +y)!= +z);
CHECK_AST(" not x:= +(y)<> +z", not x= +(y)!= +z);
CHECK_AST("( not x):= +y<> -z", ( not x)= +y!= -z);
CHECK_AST("( not x:= +y)<> -z", ( not x= +y)!= -z);
CHECK_AST(" not (x):= +y<> -z", not (x)= +y!= -z);
CHECK_AST(" not (x:= +y)<> -z", not (x= +y)!= -z);
CHECK_AST(" not x:=( +y)<> -z", not x=( +y)!= -z);
CHECK_AST(" not x:= +(y)<> -z", not x= +(y)!= -z);
CHECK_AST("( not x):= +y<> not z", ( not x)= +y!= not z);
CHECK_AST("( not x:= +y)<> not z", ( not x= +y)!= not z);
CHECK_AST(" not (x):= +y<> not z", not (x)= +y!= not z);
CHECK_AST(" not (x:= +y)<> not z", not (x= +y)!= not z);
CHECK_AST(" not x:=( +y)<> not z", not x=( +y)!= not z);
CHECK_AST(" not x:= +(y)<> not z", not x= +(y)!= not z);
CHECK_AST("( not x):= -y<>z", ( not x)= -y!=z);
CHECK_AST("( not x:= -y)<>z", ( not x= -y)!=z);
CHECK_AST(" not (x):= -y<>z", not (x)= -y!=z);
CHECK_AST(" not (x:= -y)<>z", not (x= -y)!=z);
CHECK_AST(" not x:=( -y)<>z", not x=( -y)!=z);
CHECK_AST(" not x:= -(y)<>z", not x= -(y)!=z);
CHECK_AST("( not x):= -y<> +z", ( not x)= -y!= +z);
CHECK_AST("( not x:= -y)<> +z", ( not x= -y)!= +z);
CHECK_AST(" not (x):= -y<> +z", not (x)= -y!= +z);
CHECK_AST(" not (x:= -y)<> +z", not (x= -y)!= +z);
CHECK_AST(" not x:=( -y)<> +z", not x=( -y)!= +z);
CHECK_AST(" not x:= -(y)<> +z", not x= -(y)!= +z);
CHECK_AST("( not x):= -y<> -z", ( not x)= -y!= -z);
CHECK_AST("( not x:= -y)<> -z", ( not x= -y)!= -z);
CHECK_AST(" not (x):= -y<> -z", not (x)= -y!= -z);
CHECK_AST(" not (x:= -y)<> -z", not (x= -y)!= -z);
CHECK_AST(" not x:=( -y)<> -z", not x=( -y)!= -z);
CHECK_AST(" not x:= -(y)<> -z", not x= -(y)!= -z);
CHECK_AST("( not x):= -y<> not z", ( not x)= -y!= not z);
CHECK_AST("( not x:= -y)<> not z", ( not x= -y)!= not z);
CHECK_AST(" not (x):= -y<> not z", not (x)= -y!= not z);
CHECK_AST(" not (x:= -y)<> not z", not (x= -y)!= not z);
CHECK_AST(" not x:=( -y)<> not z", not x=( -y)!= not z);
CHECK_AST(" not x:= -(y)<> not z", not x= -(y)!= not z);
CHECK_AST("( not x):= not y<>z", ( not x)= not y!=z);
CHECK_AST("( not x:= not y)<>z", ( not x= not y)!=z);
CHECK_AST(" not (x):= not y<>z", not (x)= not y!=z);
CHECK_AST(" not (x:= not y)<>z", not (x= not y)!=z);
CHECK_AST(" not x:=( not y)<>z", not x=( not y)!=z);
CHECK_AST(" not x:= not (y)<>z", not x= not (y)!=z);
CHECK_AST("( not x):= not y<> +z", ( not x)= not y!= +z);
CHECK_AST("( not x:= not y)<> +z", ( not x= not y)!= +z);
CHECK_AST(" not (x):= not y<> +z", not (x)= not y!= +z);
CHECK_AST(" not (x:= not y)<> +z", not (x= not y)!= +z);
CHECK_AST(" not x:=( not y)<> +z", not x=( not y)!= +z);
CHECK_AST(" not x:= not (y)<> +z", not x= not (y)!= +z);
CHECK_AST("( not x):= not y<> -z", ( not x)= not y!= -z);
CHECK_AST("( not x:= not y)<> -z", ( not x= not y)!= -z);
CHECK_AST(" not (x):= not y<> -z", not (x)= not y!= -z);
CHECK_AST(" not (x:= not y)<> -z", not (x= not y)!= -z);
CHECK_AST(" not x:=( not y)<> -z", not x=( not y)!= -z);
CHECK_AST(" not x:= not (y)<> -z", not x= not (y)!= -z);
CHECK_AST("( not x):= not y<> not z", ( not x)= not y!= not z);
CHECK_AST("( not x:= not y)<> not z", ( not x= not y)!= not z);
CHECK_AST(" not (x):= not y<> not z", not (x)= not y!= not z);
CHECK_AST(" not (x:= not y)<> not z", not (x= not y)!= not z);
CHECK_AST(" not x:=( not y)<> not z", not x=( not y)!= not z);
CHECK_AST(" not x:= not (y)<> not z", not x= not (y)!= not z);
CHECK_AST("(x):=y:=z", (x)=y=z);
CHECK_AST("(x:=y):=z", (x=y)=z);
CHECK_AST("x:=(y):=z", x=(y)=z);
CHECK_AST("(x):=y:= +z", (x)=y= +z);
CHECK_AST("(x:=y):= +z", (x=y)= +z);
CHECK_AST("x:=(y):= +z", x=(y)= +z);
CHECK_AST("(x):=y:= -z", (x)=y= -z);
CHECK_AST("(x:=y):= -z", (x=y)= -z);
CHECK_AST("x:=(y):= -z", x=(y)= -z);
CHECK_AST("(x):=y:= not z", (x)=y= not z);
CHECK_AST("(x:=y):= not z", (x=y)= not z);
CHECK_AST("x:=(y):= not z", x=(y)= not z);
CHECK_AST("(x):= +y:=z", (x)= +y=z);
CHECK_AST("(x:= +y):=z", (x= +y)=z);
CHECK_AST("x:=( +y):=z", x=( +y)=z);
CHECK_AST("x:= +(y):=z", x= +(y)=z);
CHECK_AST("(x):= +y:= +z", (x)= +y= +z);
CHECK_AST("(x:= +y):= +z", (x= +y)= +z);
CHECK_AST("x:=( +y):= +z", x=( +y)= +z);
CHECK_AST("x:= +(y):= +z", x= +(y)= +z);
CHECK_AST("(x):= +y:= -z", (x)= +y= -z);
CHECK_AST("(x:= +y):= -z", (x= +y)= -z);
CHECK_AST("x:=( +y):= -z", x=( +y)= -z);
CHECK_AST("x:= +(y):= -z", x= +(y)= -z);
CHECK_AST("(x):= +y:= not z", (x)= +y= not z);
CHECK_AST("(x:= +y):= not z", (x= +y)= not z);
CHECK_AST("x:=( +y):= not z", x=( +y)= not z);
CHECK_AST("x:= +(y):= not z", x= +(y)= not z);
CHECK_AST("(x):= -y:=z", (x)= -y=z);
CHECK_AST("(x:= -y):=z", (x= -y)=z);
CHECK_AST("x:=( -y):=z", x=( -y)=z);
CHECK_AST("x:= -(y):=z", x= -(y)=z);
CHECK_AST("(x):= -y:= +z", (x)= -y= +z);
CHECK_AST("(x:= -y):= +z", (x= -y)= +z);
CHECK_AST("x:=( -y):= +z", x=( -y)= +z);
CHECK_AST("x:= -(y):= +z", x= -(y)= +z);
CHECK_AST("(x):= -y:= -z", (x)= -y= -z);
CHECK_AST("(x:= -y):= -z", (x= -y)= -z);
CHECK_AST("x:=( -y):= -z", x=( -y)= -z);
CHECK_AST("x:= -(y):= -z", x= -(y)= -z);
CHECK_AST("(x):= -y:= not z", (x)= -y= not z);
CHECK_AST("(x:= -y):= not z", (x= -y)= not z);
CHECK_AST("x:=( -y):= not z", x=( -y)= not z);
CHECK_AST("x:= -(y):= not z", x= -(y)= not z);
CHECK_AST("(x):= not y:=z", (x)= not y=z);
CHECK_AST("(x:= not y):=z", (x= not y)=z);
CHECK_AST("x:=( not y):=z", x=( not y)=z);
CHECK_AST("x:= not (y):=z", x= not (y)=z);
CHECK_AST("(x):= not y:= +z", (x)= not y= +z);
CHECK_AST("(x:= not y):= +z", (x= not y)= +z);
CHECK_AST("x:=( not y):= +z", x=( not y)= +z);
CHECK_AST("x:= not (y):= +z", x= not (y)= +z);
CHECK_AST("(x):= not y:= -z", (x)= not y= -z);
CHECK_AST("(x:= not y):= -z", (x= not y)= -z);
CHECK_AST("x:=( not y):= -z", x=( not y)= -z);
CHECK_AST("x:= not (y):= -z", x= not (y)= -z);
CHECK_AST("(x):= not y:= not z", (x)= not y= not z);
CHECK_AST("(x:= not y):= not z", (x= not y)= not z);
CHECK_AST("x:=( not y):= not z", x=( not y)= not z);
CHECK_AST("x:= not (y):= not z", x= not (y)= not z);
CHECK_AST("( +x):=y:=z", ( +x)=y=z);
CHECK_AST("( +x:=y):=z", ( +x=y)=z);
CHECK_AST(" +(x):=y:=z", +(x)=y=z);
CHECK_AST(" +(x:=y):=z", +(x=y)=z);
CHECK_AST(" +x:=(y):=z", +x=(y)=z);
CHECK_AST("( +x):=y:= +z", ( +x)=y= +z);
CHECK_AST("( +x:=y):= +z", ( +x=y)= +z);
CHECK_AST(" +(x):=y:= +z", +(x)=y= +z);
CHECK_AST(" +(x:=y):= +z", +(x=y)= +z);
CHECK_AST(" +x:=(y):= +z", +x=(y)= +z);
CHECK_AST("( +x):=y:= -z", ( +x)=y= -z);
CHECK_AST("( +x:=y):= -z", ( +x=y)= -z);
CHECK_AST(" +(x):=y:= -z", +(x)=y= -z);
CHECK_AST(" +(x:=y):= -z", +(x=y)= -z);
CHECK_AST(" +x:=(y):= -z", +x=(y)= -z);
CHECK_AST("( +x):=y:= not z", ( +x)=y= not z);
CHECK_AST("( +x:=y):= not z", ( +x=y)= not z);
CHECK_AST(" +(x):=y:= not z", +(x)=y= not z);
CHECK_AST(" +(x:=y):= not z", +(x=y)= not z);
CHECK_AST(" +x:=(y):= not z", +x=(y)= not z);
CHECK_AST("( +x):= +y:=z", ( +x)= +y=z);
CHECK_AST("( +x:= +y):=z", ( +x= +y)=z);
CHECK_AST(" +(x):= +y:=z", +(x)= +y=z);
CHECK_AST(" +(x:= +y):=z", +(x= +y)=z);
CHECK_AST(" +x:=( +y):=z", +x=( +y)=z);
CHECK_AST(" +x:= +(y):=z", +x= +(y)=z);
CHECK_AST("( +x):= +y:= +z", ( +x)= +y= +z);
CHECK_AST("( +x:= +y):= +z", ( +x= +y)= +z);
CHECK_AST(" +(x):= +y:= +z", +(x)= +y= +z);
CHECK_AST(" +(x:= +y):= +z", +(x= +y)= +z);
CHECK_AST(" +x:=( +y):= +z", +x=( +y)= +z);
CHECK_AST(" +x:= +(y):= +z", +x= +(y)= +z);
CHECK_AST("( +x):= +y:= -z", ( +x)= +y= -z);
CHECK_AST("( +x:= +y):= -z", ( +x= +y)= -z);
CHECK_AST(" +(x):= +y:= -z", +(x)= +y= -z);
CHECK_AST(" +(x:= +y):= -z", +(x= +y)= -z);
CHECK_AST(" +x:=( +y):= -z", +x=( +y)= -z);
CHECK_AST(" +x:= +(y):= -z", +x= +(y)= -z);
CHECK_AST("( +x):= +y:= not z", ( +x)= +y= not z);
CHECK_AST("( +x:= +y):= not z", ( +x= +y)= not z);
CHECK_AST(" +(x):= +y:= not z", +(x)= +y= not z);
CHECK_AST(" +(x:= +y):= not z", +(x= +y)= not z);
CHECK_AST(" +x:=( +y):= not z", +x=( +y)= not z);
CHECK_AST(" +x:= +(y):= not z", +x= +(y)= not z);
CHECK_AST("( +x):= -y:=z", ( +x)= -y=z);
CHECK_AST("( +x:= -y):=z", ( +x= -y)=z);
CHECK_AST(" +(x):= -y:=z", +(x)= -y=z);
CHECK_AST(" +(x:= -y):=z", +(x= -y)=z);
CHECK_AST(" +x:=( -y):=z", +x=( -y)=z);
CHECK_AST(" +x:= -(y):=z", +x= -(y)=z);
CHECK_AST("( +x):= -y:= +z", ( +x)= -y= +z);
CHECK_AST("( +x:= -y):= +z", ( +x= -y)= +z);
CHECK_AST(" +(x):= -y:= +z", +(x)= -y= +z);
CHECK_AST(" +(x:= -y):= +z", +(x= -y)= +z);
CHECK_AST(" +x:=( -y):= +z", +x=( -y)= +z);
CHECK_AST(" +x:= -(y):= +z", +x= -(y)= +z);
CHECK_AST("( +x):= -y:= -z", ( +x)= -y= -z);
CHECK_AST("( +x:= -y):= -z", ( +x= -y)= -z);
CHECK_AST(" +(x):= -y:= -z", +(x)= -y= -z);
CHECK_AST(" +(x:= -y):= -z", +(x= -y)= -z);
CHECK_AST(" +x:=( -y):= -z", +x=( -y)= -z);
CHECK_AST(" +x:= -(y):= -z", +x= -(y)= -z);
CHECK_AST("( +x):= -y:= not z", ( +x)= -y= not z);
CHECK_AST("( +x:= -y):= not z", ( +x= -y)= not z);
CHECK_AST(" +(x):= -y:= not z", +(x)= -y= not z);
CHECK_AST(" +(x:= -y):= not z", +(x= -y)= not z);
CHECK_AST(" +x:=( -y):= not z", +x=( -y)= not z);
CHECK_AST(" +x:= -(y):= not z", +x= -(y)= not z);
CHECK_AST("( +x):= not y:=z", ( +x)= not y=z);
CHECK_AST("( +x:= not y):=z", ( +x= not y)=z);
CHECK_AST(" +(x):= not y:=z", +(x)= not y=z);
CHECK_AST(" +(x:= not y):=z", +(x= not y)=z);
CHECK_AST(" +x:=( not y):=z", +x=( not y)=z);
CHECK_AST(" +x:= not (y):=z", +x= not (y)=z);
CHECK_AST("( +x):= not y:= +z", ( +x)= not y= +z);
CHECK_AST("( +x:= not y):= +z", ( +x= not y)= +z);
CHECK_AST(" +(x):= not y:= +z", +(x)= not y= +z);
CHECK_AST(" +(x:= not y):= +z", +(x= not y)= +z);
CHECK_AST(" +x:=( not y):= +z", +x=( not y)= +z);
CHECK_AST(" +x:= not (y):= +z", +x= not (y)= +z);
CHECK_AST("( +x):= not y:= -z", ( +x)= not y= -z);
CHECK_AST("( +x:= not y):= -z", ( +x= not y)= -z);
CHECK_AST(" +(x):= not y:= -z", +(x)= not y= -z);
CHECK_AST(" +(x:= not y):= -z", +(x= not y)= -z);
CHECK_AST(" +x:=( not y):= -z", +x=( not y)= -z);
CHECK_AST(" +x:= not (y):= -z", +x= not (y)= -z);
CHECK_AST("( +x):= not y:= not z", ( +x)= not y= not z);
CHECK_AST("( +x:= not y):= not z", ( +x= not y)= not z);
CHECK_AST(" +(x):= not y:= not z", +(x)= not y= not z);
CHECK_AST(" +(x:= not y):= not z", +(x= not y)= not z);
CHECK_AST(" +x:=( not y):= not z", +x=( not y)= not z);
CHECK_AST(" +x:= not (y):= not z", +x= not (y)= not z);
CHECK_AST("( -x):=y:=z", ( -x)=y=z);
CHECK_AST("( -x:=y):=z", ( -x=y)=z);
CHECK_AST(" -(x):=y:=z", -(x)=y=z);
CHECK_AST(" -(x:=y):=z", -(x=y)=z);
CHECK_AST(" -x:=(y):=z", -x=(y)=z);
CHECK_AST("( -x):=y:= +z", ( -x)=y= +z);
CHECK_AST("( -x:=y):= +z", ( -x=y)= +z);
CHECK_AST(" -(x):=y:= +z", -(x)=y= +z);
CHECK_AST(" -(x:=y):= +z", -(x=y)= +z);
CHECK_AST(" -x:=(y):= +z", -x=(y)= +z);
CHECK_AST("( -x):=y:= -z", ( -x)=y= -z);
CHECK_AST("( -x:=y):= -z", ( -x=y)= -z);
CHECK_AST(" -(x):=y:= -z", -(x)=y= -z);
CHECK_AST(" -(x:=y):= -z", -(x=y)= -z);
CHECK_AST(" -x:=(y):= -z", -x=(y)= -z);
CHECK_AST("( -x):=y:= not z", ( -x)=y= not z);
CHECK_AST("( -x:=y):= not z", ( -x=y)= not z);
CHECK_AST(" -(x):=y:= not z", -(x)=y= not z);
CHECK_AST(" -(x:=y):= not z", -(x=y)= not z);
CHECK_AST(" -x:=(y):= not z", -x=(y)= not z);
CHECK_AST("( -x):= +y:=z", ( -x)= +y=z);
CHECK_AST("( -x:= +y):=z", ( -x= +y)=z);
CHECK_AST(" -(x):= +y:=z", -(x)= +y=z);
CHECK_AST(" -(x:= +y):=z", -(x= +y)=z);
CHECK_AST(" -x:=( +y):=z", -x=( +y)=z);
CHECK_AST(" -x:= +(y):=z", -x= +(y)=z);
CHECK_AST("( -x):= +y:= +z", ( -x)= +y= +z);
CHECK_AST("( -x:= +y):= +z", ( -x= +y)= +z);
CHECK_AST(" -(x):= +y:= +z", -(x)= +y= +z);
CHECK_AST(" -(x:= +y):= +z", -(x= +y)= +z);
CHECK_AST(" -x:=( +y):= +z", -x=( +y)= +z);
CHECK_AST(" -x:= +(y):= +z", -x= +(y)= +z);
CHECK_AST("( -x):= +y:= -z", ( -x)= +y= -z);
CHECK_AST("( -x:= +y):= -z", ( -x= +y)= -z);
CHECK_AST(" -(x):= +y:= -z", -(x)= +y= -z);
CHECK_AST(" -(x:= +y):= -z", -(x= +y)= -z);
CHECK_AST(" -x:=( +y):= -z", -x=( +y)= -z);
CHECK_AST(" -x:= +(y):= -z", -x= +(y)= -z);
CHECK_AST("( -x):= +y:= not z", ( -x)= +y= not z);
CHECK_AST("( -x:= +y):= not z", ( -x= +y)= not z);
CHECK_AST(" -(x):= +y:= not z", -(x)= +y= not z);
CHECK_AST(" -(x:= +y):= not z", -(x= +y)= not z);
CHECK_AST(" -x:=( +y):= not z", -x=( +y)= not z);
CHECK_AST(" -x:= +(y):= not z", -x= +(y)= not z);
CHECK_AST("( -x):= -y:=z", ( -x)= -y=z);
CHECK_AST("( -x:= -y):=z", ( -x= -y)=z);
CHECK_AST(" -(x):= -y:=z", -(x)= -y=z);
CHECK_AST(" -(x:= -y):=z", -(x= -y)=z);
CHECK_AST(" -x:=( -y):=z", -x=( -y)=z);
CHECK_AST(" -x:= -(y):=z", -x= -(y)=z);
CHECK_AST("( -x):= -y:= +z", ( -x)= -y= +z);
CHECK_AST("( -x:= -y):= +z", ( -x= -y)= +z);
CHECK_AST(" -(x):= -y:= +z", -(x)= -y= +z);
CHECK_AST(" -(x:= -y):= +z", -(x= -y)= +z);
CHECK_AST(" -x:=( -y):= +z", -x=( -y)= +z);
CHECK_AST(" -x:= -(y):= +z", -x= -(y)= +z);
CHECK_AST("( -x):= -y:= -z", ( -x)= -y= -z);
CHECK_AST("( -x:= -y):= -z", ( -x= -y)= -z);
CHECK_AST(" -(x):= -y:= -z", -(x)= -y= -z);
CHECK_AST(" -(x:= -y):= -z", -(x= -y)= -z);
CHECK_AST(" -x:=( -y):= -z", -x=( -y)= -z);
CHECK_AST(" -x:= -(y):= -z", -x= -(y)= -z);
CHECK_AST("( -x):= -y:= not z", ( -x)= -y= not z);
CHECK_AST("( -x:= -y):= not z", ( -x= -y)= not z);
CHECK_AST(" -(x):= -y:= not z", -(x)= -y= not z);
CHECK_AST(" -(x:= -y):= not z", -(x= -y)= not z);
CHECK_AST(" -x:=( -y):= not z", -x=( -y)= not z);
CHECK_AST(" -x:= -(y):= not z", -x= -(y)= not z);
CHECK_AST("( -x):= not y:=z", ( -x)= not y=z);
CHECK_AST("( -x:= not y):=z", ( -x= not y)=z);
CHECK_AST(" -(x):= not y:=z", -(x)= not y=z);
CHECK_AST(" -(x:= not y):=z", -(x= not y)=z);
CHECK_AST(" -x:=( not y):=z", -x=( not y)=z);
CHECK_AST(" -x:= not (y):=z", -x= not (y)=z);
CHECK_AST("( -x):= not y:= +z", ( -x)= not y= +z);
CHECK_AST("( -x:= not y):= +z", ( -x= not y)= +z);
CHECK_AST(" -(x):= not y:= +z", -(x)= not y= +z);
CHECK_AST(" -(x:= not y):= +z", -(x= not y)= +z);
CHECK_AST(" -x:=( not y):= +z", -x=( not y)= +z);
CHECK_AST(" -x:= not (y):= +z", -x= not (y)= +z);
CHECK_AST("( -x):= not y:= -z", ( -x)= not y= -z);
CHECK_AST("( -x:= not y):= -z", ( -x= not y)= -z);
CHECK_AST(" -(x):= not y:= -z", -(x)= not y= -z);
CHECK_AST(" -(x:= not y):= -z", -(x= not y)= -z);
CHECK_AST(" -x:=( not y):= -z", -x=( not y)= -z);
CHECK_AST(" -x:= not (y):= -z", -x= not (y)= -z);
CHECK_AST("( -x):= not y:= not z", ( -x)= not y= not z);
CHECK_AST("( -x:= not y):= not z", ( -x= not y)= not z);
CHECK_AST(" -(x):= not y:= not z", -(x)= not y= not z);
CHECK_AST(" -(x:= not y):= not z", -(x= not y)= not z);
CHECK_AST(" -x:=( not y):= not z", -x=( not y)= not z);
CHECK_AST(" -x:= not (y):= not z", -x= not (y)= not z);
CHECK_AST("( not x):=y:=z", ( not x)=y=z);
CHECK_AST("( not x:=y):=z", ( not x=y)=z);
CHECK_AST(" not (x):=y:=z", not (x)=y=z);
CHECK_AST(" not (x:=y):=z", not (x=y)=z);
CHECK_AST(" not x:=(y):=z", not x=(y)=z);
CHECK_AST("( not x):=y:= +z", ( not x)=y= +z);
CHECK_AST("( not x:=y):= +z", ( not x=y)= +z);
CHECK_AST(" not (x):=y:= +z", not (x)=y= +z);
CHECK_AST(" not (x:=y):= +z", not (x=y)= +z);
CHECK_AST(" not x:=(y):= +z", not x=(y)= +z);
CHECK_AST("( not x):=y:= -z", ( not x)=y= -z);
CHECK_AST("( not x:=y):= -z", ( not x=y)= -z);
CHECK_AST(" not (x):=y:= -z", not (x)=y= -z);
CHECK_AST(" not (x:=y):= -z", not (x=y)= -z);
CHECK_AST(" not x:=(y):= -z", not x=(y)= -z);
CHECK_AST("( not x):=y:= not z", ( not x)=y= not z);
CHECK_AST("( not x:=y):= not z", ( not x=y)= not z);
CHECK_AST(" not (x):=y:= not z", not (x)=y= not z);
CHECK_AST(" not (x:=y):= not z", not (x=y)= not z);
CHECK_AST(" not x:=(y):= not z", not x=(y)= not z);
CHECK_AST("( not x):= +y:=z", ( not x)= +y=z);
CHECK_AST("( not x:= +y):=z", ( not x= +y)=z);
CHECK_AST(" not (x):= +y:=z", not (x)= +y=z);
CHECK_AST(" not (x:= +y):=z", not (x= +y)=z);
CHECK_AST(" not x:=( +y):=z", not x=( +y)=z);
CHECK_AST(" not x:= +(y):=z", not x= +(y)=z);
CHECK_AST("( not x):= +y:= +z", ( not x)= +y= +z);
CHECK_AST("( not x:= +y):= +z", ( not x= +y)= +z);
CHECK_AST(" not (x):= +y:= +z", not (x)= +y= +z);
CHECK_AST(" not (x:= +y):= +z", not (x= +y)= +z);
CHECK_AST(" not x:=( +y):= +z", not x=( +y)= +z);
CHECK_AST(" not x:= +(y):= +z", not x= +(y)= +z);
CHECK_AST("( not x):= +y:= -z", ( not x)= +y= -z);
CHECK_AST("( not x:= +y):= -z", ( not x= +y)= -z);
CHECK_AST(" not (x):= +y:= -z", not (x)= +y= -z);
CHECK_AST(" not (x:= +y):= -z", not (x= +y)= -z);
CHECK_AST(" not x:=( +y):= -z", not x=( +y)= -z);
CHECK_AST(" not x:= +(y):= -z", not x= +(y)= -z);
CHECK_AST("( not x):= +y:= not z", ( not x)= +y= not z);
CHECK_AST("( not x:= +y):= not z", ( not x= +y)= not z);
CHECK_AST(" not (x):= +y:= not z", not (x)= +y= not z);
CHECK_AST(" not (x:= +y):= not z", not (x= +y)= not z);
CHECK_AST(" not x:=( +y):= not z", not x=( +y)= not z);
CHECK_AST(" not x:= +(y):= not z", not x= +(y)= not z);
CHECK_AST("( not x):= -y:=z", ( not x)= -y=z);
CHECK_AST("( not x:= -y):=z", ( not x= -y)=z);
CHECK_AST(" not (x):= -y:=z", not (x)= -y=z);
CHECK_AST(" not (x:= -y):=z", not (x= -y)=z);
CHECK_AST(" not x:=( -y):=z", not x=( -y)=z);
CHECK_AST(" not x:= -(y):=z", not x= -(y)=z);
CHECK_AST("( not x):= -y:= +z", ( not x)= -y= +z);
CHECK_AST("( not x:= -y):= +z", ( not x= -y)= +z);
CHECK_AST(" not (x):= -y:= +z", not (x)= -y= +z);
CHECK_AST(" not (x:= -y):= +z", not (x= -y)= +z);
CHECK_AST(" not x:=( -y):= +z", not x=( -y)= +z);
CHECK_AST(" not x:= -(y):= +z", not x= -(y)= +z);
CHECK_AST("( not x):= -y:= -z", ( not x)= -y= -z);
CHECK_AST("( not x:= -y):= -z", ( not x= -y)= -z);
CHECK_AST(" not (x):= -y:= -z", not (x)= -y= -z);
CHECK_AST(" not (x:= -y):= -z", not (x= -y)= -z);
CHECK_AST(" not x:=( -y):= -z", not x=( -y)= -z);
CHECK_AST(" not x:= -(y):= -z", not x= -(y)= -z);
CHECK_AST("( not x):= -y:= not z", ( not x)= -y= not z);
CHECK_AST("( not x:= -y):= not z", ( not x= -y)= not z);
CHECK_AST(" not (x):= -y:= not z", not (x)= -y= not z);
CHECK_AST(" not (x:= -y):= not z", not (x= -y)= not z);
CHECK_AST(" not x:=( -y):= not z", not x=( -y)= not z);
CHECK_AST(" not x:= -(y):= not z", not x= -(y)= not z);
CHECK_AST("( not x):= not y:=z", ( not x)= not y=z);
CHECK_AST("( not x:= not y):=z", ( not x= not y)=z);
CHECK_AST(" not (x):= not y:=z", not (x)= not y=z);
CHECK_AST(" not (x:= not y):=z", not (x= not y)=z);
CHECK_AST(" not x:=( not y):=z", not x=( not y)=z);
CHECK_AST(" not x:= not (y):=z", not x= not (y)=z);
CHECK_AST("( not x):= not y:= +z", ( not x)= not y= +z);
CHECK_AST("( not x:= not y):= +z", ( not x= not y)= +z);
CHECK_AST(" not (x):= not y:= +z", not (x)= not y= +z);
CHECK_AST(" not (x:= not y):= +z", not (x= not y)= +z);
CHECK_AST(" not x:=( not y):= +z", not x=( not y)= +z);
CHECK_AST(" not x:= not (y):= +z", not x= not (y)= +z);
CHECK_AST("( not x):= not y:= -z", ( not x)= not y= -z);
CHECK_AST("( not x:= not y):= -z", ( not x= not y)= -z);
CHECK_AST(" not (x):= not y:= -z", not (x)= not y= -z);
CHECK_AST(" not (x:= not y):= -z", not (x= not y)= -z);
CHECK_AST(" not x:=( not y):= -z", not x=( not y)= -z);
CHECK_AST(" not x:= not (y):= -z", not x= not (y)= -z);
CHECK_AST("( not x):= not y:= not z", ( not x)= not y= not z);
CHECK_AST("( not x:= not y):= not z", ( not x= not y)= not z);
CHECK_AST(" not (x):= not y:= not z", not (x)= not y= not z);
CHECK_AST(" not (x:= not y):= not z", not (x= not y)= not z);
CHECK_AST(" not x:=( not y):= not z", not x=( not y)= not z);
CHECK_AST(" not x:= not (y):= not z", not x= not (y)= not z);
CHECK_AST("(x):=y and z", (x)=y&z);
CHECK_AST("(x:=y) and z", (x=y)&z);
CHECK_AST("x:=(y) and z", x=(y)&z);
CHECK_AST("(x):=y and +z", (x)=y& +z);
CHECK_AST("(x:=y) and +z", (x=y)& +z);
CHECK_AST("x:=(y) and +z", x=(y)& +z);
CHECK_AST("(x):=y and -z", (x)=y& -z);
CHECK_AST("(x:=y) and -z", (x=y)& -z);
CHECK_AST("x:=(y) and -z", x=(y)& -z);
CHECK_AST("(x):=y and not z", (x)=y& not z);
CHECK_AST("(x:=y) and not z", (x=y)& not z);
CHECK_AST("x:=(y) and not z", x=(y)& not z);
CHECK_AST("(x):= +y and z", (x)= +y&z);
CHECK_AST("(x:= +y) and z", (x= +y)&z);
CHECK_AST("x:=( +y) and z", x=( +y)&z);
CHECK_AST("x:= +(y) and z", x= +(y)&z);
CHECK_AST("(x):= +y and +z", (x)= +y& +z);
CHECK_AST("(x:= +y) and +z", (x= +y)& +z);
CHECK_AST("x:=( +y) and +z", x=( +y)& +z);
CHECK_AST("x:= +(y) and +z", x= +(y)& +z);
CHECK_AST("(x):= +y and -z", (x)= +y& -z);
CHECK_AST("(x:= +y) and -z", (x= +y)& -z);
CHECK_AST("x:=( +y) and -z", x=( +y)& -z);
CHECK_AST("x:= +(y) and -z", x= +(y)& -z);
CHECK_AST("(x):= +y and not z", (x)= +y& not z);
CHECK_AST("(x:= +y) and not z", (x= +y)& not z);
CHECK_AST("x:=( +y) and not z", x=( +y)& not z);
CHECK_AST("x:= +(y) and not z", x= +(y)& not z);
CHECK_AST("(x):= -y and z", (x)= -y&z);
CHECK_AST("(x:= -y) and z", (x= -y)&z);
CHECK_AST("x:=( -y) and z", x=( -y)&z);
CHECK_AST("x:= -(y) and z", x= -(y)&z);
CHECK_AST("(x):= -y and +z", (x)= -y& +z);
CHECK_AST("(x:= -y) and +z", (x= -y)& +z);
CHECK_AST("x:=( -y) and +z", x=( -y)& +z);
CHECK_AST("x:= -(y) and +z", x= -(y)& +z);
CHECK_AST("(x):= -y and -z", (x)= -y& -z);
CHECK_AST("(x:= -y) and -z", (x= -y)& -z);
CHECK_AST("x:=( -y) and -z", x=( -y)& -z);
CHECK_AST("x:= -(y) and -z", x= -(y)& -z);
CHECK_AST("(x):= -y and not z", (x)= -y& not z);
CHECK_AST("(x:= -y) and not z", (x= -y)& not z);
CHECK_AST("x:=( -y) and not z", x=( -y)& not z);
CHECK_AST("x:= -(y) and not z", x= -(y)& not z);
CHECK_AST("(x):= not y and z", (x)= not y&z);
CHECK_AST("(x:= not y) and z", (x= not y)&z);
CHECK_AST("x:=( not y) and z", x=( not y)&z);
CHECK_AST("x:= not (y) and z", x= not (y)&z);
CHECK_AST("(x):= not y and +z", (x)= not y& +z);
CHECK_AST("(x:= not y) and +z", (x= not y)& +z);
CHECK_AST("x:=( not y) and +z", x=( not y)& +z);
CHECK_AST("x:= not (y) and +z", x= not (y)& +z);
CHECK_AST("(x):= not y and -z", (x)= not y& -z);
CHECK_AST("(x:= not y) and -z", (x= not y)& -z);
CHECK_AST("x:=( not y) and -z", x=( not y)& -z);
CHECK_AST("x:= not (y) and -z", x= not (y)& -z);
CHECK_AST("(x):= not y and not z", (x)= not y& not z);
CHECK_AST("(x:= not y) and not z", (x= not y)& not z);
CHECK_AST("x:=( not y) and not z", x=( not y)& not z);
CHECK_AST("x:= not (y) and not z", x= not (y)& not z);
CHECK_AST("( +x):=y and z", ( +x)=y&z);
CHECK_AST("( +x:=y) and z", ( +x=y)&z);
CHECK_AST(" +(x):=y and z", +(x)=y&z);
CHECK_AST(" +(x:=y) and z", +(x=y)&z);
CHECK_AST(" +x:=(y) and z", +x=(y)&z);
CHECK_AST("( +x):=y and +z", ( +x)=y& +z);
CHECK_AST("( +x:=y) and +z", ( +x=y)& +z);
CHECK_AST(" +(x):=y and +z", +(x)=y& +z);
CHECK_AST(" +(x:=y) and +z", +(x=y)& +z);
CHECK_AST(" +x:=(y) and +z", +x=(y)& +z);
CHECK_AST("( +x):=y and -z", ( +x)=y& -z);
CHECK_AST("( +x:=y) and -z", ( +x=y)& -z);
CHECK_AST(" +(x):=y and -z", +(x)=y& -z);
CHECK_AST(" +(x:=y) and -z", +(x=y)& -z);
CHECK_AST(" +x:=(y) and -z", +x=(y)& -z);
CHECK_AST("( +x):=y and not z", ( +x)=y& not z);
CHECK_AST("( +x:=y) and not z", ( +x=y)& not z);
CHECK_AST(" +(x):=y and not z", +(x)=y& not z);
CHECK_AST(" +(x:=y) and not z", +(x=y)& not z);
CHECK_AST(" +x:=(y) and not z", +x=(y)& not z);
CHECK_AST("( +x):= +y and z", ( +x)= +y&z);
CHECK_AST("( +x:= +y) and z", ( +x= +y)&z);
CHECK_AST(" +(x):= +y and z", +(x)= +y&z);
CHECK_AST(" +(x:= +y) and z", +(x= +y)&z);
CHECK_AST(" +x:=( +y) and z", +x=( +y)&z);
CHECK_AST(" +x:= +(y) and z", +x= +(y)&z);
CHECK_AST("( +x):= +y and +z", ( +x)= +y& +z);
CHECK_AST("( +x:= +y) and +z", ( +x= +y)& +z);
CHECK_AST(" +(x):= +y and +z", +(x)= +y& +z);
CHECK_AST(" +(x:= +y) and +z", +(x= +y)& +z);
CHECK_AST(" +x:=( +y) and +z", +x=( +y)& +z);
CHECK_AST(" +x:= +(y) and +z", +x= +(y)& +z);
CHECK_AST("( +x):= +y and -z", ( +x)= +y& -z);
CHECK_AST("( +x:= +y) and -z", ( +x= +y)& -z);
CHECK_AST(" +(x):= +y and -z", +(x)= +y& -z);
CHECK_AST(" +(x:= +y) and -z", +(x= +y)& -z);
CHECK_AST(" +x:=( +y) and -z", +x=( +y)& -z);
CHECK_AST(" +x:= +(y) and -z", +x= +(y)& -z);
CHECK_AST("( +x):= +y and not z", ( +x)= +y& not z);
CHECK_AST("( +x:= +y) and not z", ( +x= +y)& not z);
CHECK_AST(" +(x):= +y and not z", +(x)= +y& not z);
CHECK_AST(" +(x:= +y) and not z", +(x= +y)& not z);
CHECK_AST(" +x:=( +y) and not z", +x=( +y)& not z);
CHECK_AST(" +x:= +(y) and not z", +x= +(y)& not z);
CHECK_AST("( +x):= -y and z", ( +x)= -y&z);
CHECK_AST("( +x:= -y) and z", ( +x= -y)&z);
CHECK_AST(" +(x):= -y and z", +(x)= -y&z);
CHECK_AST(" +(x:= -y) and z", +(x= -y)&z);
CHECK_AST(" +x:=( -y) and z", +x=( -y)&z);
CHECK_AST(" +x:= -(y) and z", +x= -(y)&z);
CHECK_AST("( +x):= -y and +z", ( +x)= -y& +z);
CHECK_AST("( +x:= -y) and +z", ( +x= -y)& +z);
CHECK_AST(" +(x):= -y and +z", +(x)= -y& +z);
CHECK_AST(" +(x:= -y) and +z", +(x= -y)& +z);
CHECK_AST(" +x:=( -y) and +z", +x=( -y)& +z);
CHECK_AST(" +x:= -(y) and +z", +x= -(y)& +z);
CHECK_AST("( +x):= -y and -z", ( +x)= -y& -z);
CHECK_AST("( +x:= -y) and -z", ( +x= -y)& -z);
CHECK_AST(" +(x):= -y and -z", +(x)= -y& -z);
CHECK_AST(" +(x:= -y) and -z", +(x= -y)& -z);
CHECK_AST(" +x:=( -y) and -z", +x=( -y)& -z);
CHECK_AST(" +x:= -(y) and -z", +x= -(y)& -z);
CHECK_AST("( +x):= -y and not z", ( +x)= -y& not z);
CHECK_AST("( +x:= -y) and not z", ( +x= -y)& not z);
CHECK_AST(" +(x):= -y and not z", +(x)= -y& not z);
CHECK_AST(" +(x:= -y) and not z", +(x= -y)& not z);
CHECK_AST(" +x:=( -y) and not z", +x=( -y)& not z);
CHECK_AST(" +x:= -(y) and not z", +x= -(y)& not z);
CHECK_AST("( +x):= not y and z", ( +x)= not y&z);
CHECK_AST("( +x:= not y) and z", ( +x= not y)&z);
CHECK_AST(" +(x):= not y and z", +(x)= not y&z);
CHECK_AST(" +(x:= not y) and z", +(x= not y)&z);
CHECK_AST(" +x:=( not y) and z", +x=( not y)&z);
CHECK_AST(" +x:= not (y) and z", +x= not (y)&z);
CHECK_AST("( +x):= not y and +z", ( +x)= not y& +z);
CHECK_AST("( +x:= not y) and +z", ( +x= not y)& +z);
CHECK_AST(" +(x):= not y and +z", +(x)= not y& +z);
CHECK_AST(" +(x:= not y) and +z", +(x= not y)& +z);
CHECK_AST(" +x:=( not y) and +z", +x=( not y)& +z);
CHECK_AST(" +x:= not (y) and +z", +x= not (y)& +z);
CHECK_AST("( +x):= not y and -z", ( +x)= not y& -z);
CHECK_AST("( +x:= not y) and -z", ( +x= not y)& -z);
CHECK_AST(" +(x):= not y and -z", +(x)= not y& -z);
CHECK_AST(" +(x:= not y) and -z", +(x= not y)& -z);
CHECK_AST(" +x:=( not y) and -z", +x=( not y)& -z);
CHECK_AST(" +x:= not (y) and -z", +x= not (y)& -z);
CHECK_AST("( +x):= not y and not z", ( +x)= not y& not z);
CHECK_AST("( +x:= not y) and not z", ( +x= not y)& not z);
CHECK_AST(" +(x):= not y and not z", +(x)= not y& not z);
CHECK_AST(" +(x:= not y) and not z", +(x= not y)& not z);
CHECK_AST(" +x:=( not y) and not z", +x=( not y)& not z);
CHECK_AST(" +x:= not (y) and not z", +x= not (y)& not z);
CHECK_AST("( -x):=y and z", ( -x)=y&z);
CHECK_AST("( -x:=y) and z", ( -x=y)&z);
CHECK_AST(" -(x):=y and z", -(x)=y&z);
CHECK_AST(" -(x:=y) and z", -(x=y)&z);
CHECK_AST(" -x:=(y) and z", -x=(y)&z);
CHECK_AST("( -x):=y and +z", ( -x)=y& +z);
CHECK_AST("( -x:=y) and +z", ( -x=y)& +z);
CHECK_AST(" -(x):=y and +z", -(x)=y& +z);
CHECK_AST(" -(x:=y) and +z", -(x=y)& +z);
CHECK_AST(" -x:=(y) and +z", -x=(y)& +z);
CHECK_AST("( -x):=y and -z", ( -x)=y& -z);
CHECK_AST("( -x:=y) and -z", ( -x=y)& -z);
CHECK_AST(" -(x):=y and -z", -(x)=y& -z);
CHECK_AST(" -(x:=y) and -z", -(x=y)& -z);
CHECK_AST(" -x:=(y) and -z", -x=(y)& -z);
CHECK_AST("( -x):=y and not z", ( -x)=y& not z);
CHECK_AST("( -x:=y) and not z", ( -x=y)& not z);
CHECK_AST(" -(x):=y and not z", -(x)=y& not z);
CHECK_AST(" -(x:=y) and not z", -(x=y)& not z);
CHECK_AST(" -x:=(y) and not z", -x=(y)& not z);
CHECK_AST("( -x):= +y and z", ( -x)= +y&z);
CHECK_AST("( -x:= +y) and z", ( -x= +y)&z);
CHECK_AST(" -(x):= +y and z", -(x)= +y&z);
CHECK_AST(" -(x:= +y) and z", -(x= +y)&z);
CHECK_AST(" -x:=( +y) and z", -x=( +y)&z);
CHECK_AST(" -x:= +(y) and z", -x= +(y)&z);
CHECK_AST("( -x):= +y and +z", ( -x)= +y& +z);
CHECK_AST("( -x:= +y) and +z", ( -x= +y)& +z);
CHECK_AST(" -(x):= +y and +z", -(x)= +y& +z);
CHECK_AST(" -(x:= +y) and +z", -(x= +y)& +z);
CHECK_AST(" -x:=( +y) and +z", -x=( +y)& +z);
CHECK_AST(" -x:= +(y) and +z", -x= +(y)& +z);
CHECK_AST("( -x):= +y and -z", ( -x)= +y& -z);
CHECK_AST("( -x:= +y) and -z", ( -x= +y)& -z);
CHECK_AST(" -(x):= +y and -z", -(x)= +y& -z);
CHECK_AST(" -(x:= +y) and -z", -(x= +y)& -z);
CHECK_AST(" -x:=( +y) and -z", -x=( +y)& -z);
CHECK_AST(" -x:= +(y) and -z", -x= +(y)& -z);
CHECK_AST("( -x):= +y and not z", ( -x)= +y& not z);
CHECK_AST("( -x:= +y) and not z", ( -x= +y)& not z);
CHECK_AST(" -(x):= +y and not z", -(x)= +y& not z);
CHECK_AST(" -(x:= +y) and not z", -(x= +y)& not z);
CHECK_AST(" -x:=( +y) and not z", -x=( +y)& not z);
CHECK_AST(" -x:= +(y) and not z", -x= +(y)& not z);
CHECK_AST("( -x):= -y and z", ( -x)= -y&z);
CHECK_AST("( -x:= -y) and z", ( -x= -y)&z);
CHECK_AST(" -(x):= -y and z", -(x)= -y&z);
CHECK_AST(" -(x:= -y) and z", -(x= -y)&z);
CHECK_AST(" -x:=( -y) and z", -x=( -y)&z);
CHECK_AST(" -x:= -(y) and z", -x= -(y)&z);
CHECK_AST("( -x):= -y and +z", ( -x)= -y& +z);
CHECK_AST("( -x:= -y) and +z", ( -x= -y)& +z);
CHECK_AST(" -(x):= -y and +z", -(x)= -y& +z);
CHECK_AST(" -(x:= -y) and +z", -(x= -y)& +z);
CHECK_AST(" -x:=( -y) and +z", -x=( -y)& +z);
CHECK_AST(" -x:= -(y) and +z", -x= -(y)& +z);
CHECK_AST("( -x):= -y and -z", ( -x)= -y& -z);
CHECK_AST("( -x:= -y) and -z", ( -x= -y)& -z);
CHECK_AST(" -(x):= -y and -z", -(x)= -y& -z);
CHECK_AST(" -(x:= -y) and -z", -(x= -y)& -z);
CHECK_AST(" -x:=( -y) and -z", -x=( -y)& -z);
CHECK_AST(" -x:= -(y) and -z", -x= -(y)& -z);
CHECK_AST("( -x):= -y and not z", ( -x)= -y& not z);
CHECK_AST("( -x:= -y) and not z", ( -x= -y)& not z);
CHECK_AST(" -(x):= -y and not z", -(x)= -y& not z);
CHECK_AST(" -(x:= -y) and not z", -(x= -y)& not z);
CHECK_AST(" -x:=( -y) and not z", -x=( -y)& not z);
CHECK_AST(" -x:= -(y) and not z", -x= -(y)& not z);
CHECK_AST("( -x):= not y and z", ( -x)= not y&z);
CHECK_AST("( -x:= not y) and z", ( -x= not y)&z);
CHECK_AST(" -(x):= not y and z", -(x)= not y&z);
CHECK_AST(" -(x:= not y) and z", -(x= not y)&z);
CHECK_AST(" -x:=( not y) and z", -x=( not y)&z);
CHECK_AST(" -x:= not (y) and z", -x= not (y)&z);
CHECK_AST("( -x):= not y and +z", ( -x)= not y& +z);
CHECK_AST("( -x:= not y) and +z", ( -x= not y)& +z);
CHECK_AST(" -(x):= not y and +z", -(x)= not y& +z);
CHECK_AST(" -(x:= not y) and +z", -(x= not y)& +z);
CHECK_AST(" -x:=( not y) and +z", -x=( not y)& +z);
CHECK_AST(" -x:= not (y) and +z", -x= not (y)& +z);
CHECK_AST("( -x):= not y and -z", ( -x)= not y& -z);
CHECK_AST("( -x:= not y) and -z", ( -x= not y)& -z);
CHECK_AST(" -(x):= not y and -z", -(x)= not y& -z);
CHECK_AST(" -(x:= not y) and -z", -(x= not y)& -z);
CHECK_AST(" -x:=( not y) and -z", -x=( not y)& -z);
CHECK_AST(" -x:= not (y) and -z", -x= not (y)& -z);
CHECK_AST("( -x):= not y and not z", ( -x)= not y& not z);
CHECK_AST("( -x:= not y) and not z", ( -x= not y)& not z);
CHECK_AST(" -(x):= not y and not z", -(x)= not y& not z);
CHECK_AST(" -(x:= not y) and not z", -(x= not y)& not z);
CHECK_AST(" -x:=( not y) and not z", -x=( not y)& not z);
CHECK_AST(" -x:= not (y) and not z", -x= not (y)& not z);
CHECK_AST("( not x):=y and z", ( not x)=y&z);
CHECK_AST("( not x:=y) and z", ( not x=y)&z);
CHECK_AST(" not (x):=y and z", not (x)=y&z);
CHECK_AST(" not (x:=y) and z", not (x=y)&z);
CHECK_AST(" not x:=(y) and z", not x=(y)&z);
CHECK_AST("( not x):=y and +z", ( not x)=y& +z);
CHECK_AST("( not x:=y) and +z", ( not x=y)& +z);
CHECK_AST(" not (x):=y and +z", not (x)=y& +z);
CHECK_AST(" not (x:=y) and +z", not (x=y)& +z);
CHECK_AST(" not x:=(y) and +z", not x=(y)& +z);
CHECK_AST("( not x):=y and -z", ( not x)=y& -z);
CHECK_AST("( not x:=y) and -z", ( not x=y)& -z);
CHECK_AST(" not (x):=y and -z", not (x)=y& -z);
CHECK_AST(" not (x:=y) and -z", not (x=y)& -z);
CHECK_AST(" not x:=(y) and -z", not x=(y)& -z);
CHECK_AST("( not x):=y and not z", ( not x)=y& not z);
CHECK_AST("( not x:=y) and not z", ( not x=y)& not z);
CHECK_AST(" not (x):=y and not z", not (x)=y& not z);
CHECK_AST(" not (x:=y) and not z", not (x=y)& not z);
CHECK_AST(" not x:=(y) and not z", not x=(y)& not z);
CHECK_AST("( not x):= +y and z", ( not x)= +y&z);
CHECK_AST("( not x:= +y) and z", ( not x= +y)&z);
CHECK_AST(" not (x):= +y and z", not (x)= +y&z);
CHECK_AST(" not (x:= +y) and z", not (x= +y)&z);
CHECK_AST(" not x:=( +y) and z", not x=( +y)&z);
CHECK_AST(" not x:= +(y) and z", not x= +(y)&z);
CHECK_AST("( not x):= +y and +z", ( not x)= +y& +z);
CHECK_AST("( not x:= +y) and +z", ( not x= +y)& +z);
CHECK_AST(" not (x):= +y and +z", not (x)= +y& +z);
CHECK_AST(" not (x:= +y) and +z", not (x= +y)& +z);
CHECK_AST(" not x:=( +y) and +z", not x=( +y)& +z);
CHECK_AST(" not x:= +(y) and +z", not x= +(y)& +z);
CHECK_AST("( not x):= +y and -z", ( not x)= +y& -z);
CHECK_AST("( not x:= +y) and -z", ( not x= +y)& -z);
CHECK_AST(" not (x):= +y and -z", not (x)= +y& -z);
CHECK_AST(" not (x:= +y) and -z", not (x= +y)& -z);
CHECK_AST(" not x:=( +y) and -z", not x=( +y)& -z);
CHECK_AST(" not x:= +(y) and -z", not x= +(y)& -z);
CHECK_AST("( not x):= +y and not z", ( not x)= +y& not z);
CHECK_AST("( not x:= +y) and not z", ( not x= +y)& not z);
CHECK_AST(" not (x):= +y and not z", not (x)= +y& not z);
CHECK_AST(" not (x:= +y) and not z", not (x= +y)& not z);
CHECK_AST(" not x:=( +y) and not z", not x=( +y)& not z);
CHECK_AST(" not x:= +(y) and not z", not x= +(y)& not z);
CHECK_AST("( not x):= -y and z", ( not x)= -y&z);
CHECK_AST("( not x:= -y) and z", ( not x= -y)&z);
CHECK_AST(" not (x):= -y and z", not (x)= -y&z);
CHECK_AST(" not (x:= -y) and z", not (x= -y)&z);
CHECK_AST(" not x:=( -y) and z", not x=( -y)&z);
CHECK_AST(" not x:= -(y) and z", not x= -(y)&z);
CHECK_AST("( not x):= -y and +z", ( not x)= -y& +z);
CHECK_AST("( not x:= -y) and +z", ( not x= -y)& +z);
CHECK_AST(" not (x):= -y and +z", not (x)= -y& +z);
CHECK_AST(" not (x:= -y) and +z", not (x= -y)& +z);
CHECK_AST(" not x:=( -y) and +z", not x=( -y)& +z);
CHECK_AST(" not x:= -(y) and +z", not x= -(y)& +z);
CHECK_AST("( not x):= -y and -z", ( not x)= -y& -z);
CHECK_AST("( not x:= -y) and -z", ( not x= -y)& -z);
CHECK_AST(" not (x):= -y and -z", not (x)= -y& -z);
CHECK_AST(" not (x:= -y) and -z", not (x= -y)& -z);
CHECK_AST(" not x:=( -y) and -z", not x=( -y)& -z);
CHECK_AST(" not x:= -(y) and -z", not x= -(y)& -z);
CHECK_AST("( not x):= -y and not z", ( not x)= -y& not z);
CHECK_AST("( not x:= -y) and not z", ( not x= -y)& not z);
CHECK_AST(" not (x):= -y and not z", not (x)= -y& not z);
CHECK_AST(" not (x:= -y) and not z", not (x= -y)& not z);
CHECK_AST(" not x:=( -y) and not z", not x=( -y)& not z);
CHECK_AST(" not x:= -(y) and not z", not x= -(y)& not z);
CHECK_AST("( not x):= not y and z", ( not x)= not y&z);
CHECK_AST("( not x:= not y) and z", ( not x= not y)&z);
CHECK_AST(" not (x):= not y and z", not (x)= not y&z);
CHECK_AST(" not (x:= not y) and z", not (x= not y)&z);
CHECK_AST(" not x:=( not y) and z", not x=( not y)&z);
CHECK_AST(" not x:= not (y) and z", not x= not (y)&z);
CHECK_AST("( not x):= not y and +z", ( not x)= not y& +z);
CHECK_AST("( not x:= not y) and +z", ( not x= not y)& +z);
CHECK_AST(" not (x):= not y and +z", not (x)= not y& +z);
CHECK_AST(" not (x:= not y) and +z", not (x= not y)& +z);
CHECK_AST(" not x:=( not y) and +z", not x=( not y)& +z);
CHECK_AST(" not x:= not (y) and +z", not x= not (y)& +z);
CHECK_AST("( not x):= not y and -z", ( not x)= not y& -z);
CHECK_AST("( not x:= not y) and -z", ( not x= not y)& -z);
CHECK_AST(" not (x):= not y and -z", not (x)= not y& -z);
CHECK_AST(" not (x:= not y) and -z", not (x= not y)& -z);
CHECK_AST(" not x:=( not y) and -z", not x=( not y)& -z);
CHECK_AST(" not x:= not (y) and -z", not x= not (y)& -z);
CHECK_AST("( not x):= not y and not z", ( not x)= not y& not z);
CHECK_AST("( not x:= not y) and not z", ( not x= not y)& not z);
CHECK_AST(" not (x):= not y and not z", not (x)= not y& not z);
CHECK_AST(" not (x:= not y) and not z", not (x= not y)& not z);
CHECK_AST(" not x:=( not y) and not z", not x=( not y)& not z);
CHECK_AST(" not x:= not (y) and not z", not x= not (y)& not z);
CHECK_AST("(x):=y xor z", (x)=y^z);
CHECK_AST("(x:=y) xor z", (x=y)^z);
CHECK_AST("x:=(y) xor z", x=(y)^z);
CHECK_AST("(x):=y xor +z", (x)=y^ +z);
CHECK_AST("(x:=y) xor +z", (x=y)^ +z);
CHECK_AST("x:=(y) xor +z", x=(y)^ +z);
CHECK_AST("(x):=y xor -z", (x)=y^ -z);
CHECK_AST("(x:=y) xor -z", (x=y)^ -z);
CHECK_AST("x:=(y) xor -z", x=(y)^ -z);
CHECK_AST("(x):=y xor not z", (x)=y^ not z);
CHECK_AST("(x:=y) xor not z", (x=y)^ not z);
CHECK_AST("x:=(y) xor not z", x=(y)^ not z);
CHECK_AST("(x):= +y xor z", (x)= +y^z);
CHECK_AST("(x:= +y) xor z", (x= +y)^z);
CHECK_AST("x:=( +y) xor z", x=( +y)^z);
CHECK_AST("x:= +(y) xor z", x= +(y)^z);
CHECK_AST("(x):= +y xor +z", (x)= +y^ +z);
CHECK_AST("(x:= +y) xor +z", (x= +y)^ +z);
CHECK_AST("x:=( +y) xor +z", x=( +y)^ +z);
CHECK_AST("x:= +(y) xor +z", x= +(y)^ +z);
CHECK_AST("(x):= +y xor -z", (x)= +y^ -z);
CHECK_AST("(x:= +y) xor -z", (x= +y)^ -z);
CHECK_AST("x:=( +y) xor -z", x=( +y)^ -z);
CHECK_AST("x:= +(y) xor -z", x= +(y)^ -z);
CHECK_AST("(x):= +y xor not z", (x)= +y^ not z);
CHECK_AST("(x:= +y) xor not z", (x= +y)^ not z);
CHECK_AST("x:=( +y) xor not z", x=( +y)^ not z);
CHECK_AST("x:= +(y) xor not z", x= +(y)^ not z);
CHECK_AST("(x):= -y xor z", (x)= -y^z);
CHECK_AST("(x:= -y) xor z", (x= -y)^z);
CHECK_AST("x:=( -y) xor z", x=( -y)^z);
CHECK_AST("x:= -(y) xor z", x= -(y)^z);
CHECK_AST("(x):= -y xor +z", (x)= -y^ +z);
CHECK_AST("(x:= -y) xor +z", (x= -y)^ +z);
CHECK_AST("x:=( -y) xor +z", x=( -y)^ +z);
CHECK_AST("x:= -(y) xor +z", x= -(y)^ +z);
CHECK_AST("(x):= -y xor -z", (x)= -y^ -z);
CHECK_AST("(x:= -y) xor -z", (x= -y)^ -z);
CHECK_AST("x:=( -y) xor -z", x=( -y)^ -z);
CHECK_AST("x:= -(y) xor -z", x= -(y)^ -z);
CHECK_AST("(x):= -y xor not z", (x)= -y^ not z);
CHECK_AST("(x:= -y) xor not z", (x= -y)^ not z);
CHECK_AST("x:=( -y) xor not z", x=( -y)^ not z);
CHECK_AST("x:= -(y) xor not z", x= -(y)^ not z);
CHECK_AST("(x):= not y xor z", (x)= not y^z);
CHECK_AST("(x:= not y) xor z", (x= not y)^z);
CHECK_AST("x:=( not y) xor z", x=( not y)^z);
CHECK_AST("x:= not (y) xor z", x= not (y)^z);
CHECK_AST("(x):= not y xor +z", (x)= not y^ +z);
CHECK_AST("(x:= not y) xor +z", (x= not y)^ +z);
CHECK_AST("x:=( not y) xor +z", x=( not y)^ +z);
CHECK_AST("x:= not (y) xor +z", x= not (y)^ +z);
CHECK_AST("(x):= not y xor -z", (x)= not y^ -z);
CHECK_AST("(x:= not y) xor -z", (x= not y)^ -z);
CHECK_AST("x:=( not y) xor -z", x=( not y)^ -z);
CHECK_AST("x:= not (y) xor -z", x= not (y)^ -z);
CHECK_AST("(x):= not y xor not z", (x)= not y^ not z);
CHECK_AST("(x:= not y) xor not z", (x= not y)^ not z);
CHECK_AST("x:=( not y) xor not z", x=( not y)^ not z);
CHECK_AST("x:= not (y) xor not z", x= not (y)^ not z);
CHECK_AST("( +x):=y xor z", ( +x)=y^z);
CHECK_AST("( +x:=y) xor z", ( +x=y)^z);
CHECK_AST(" +(x):=y xor z", +(x)=y^z);
CHECK_AST(" +(x:=y) xor z", +(x=y)^z);
CHECK_AST(" +x:=(y) xor z", +x=(y)^z);
CHECK_AST("( +x):=y xor +z", ( +x)=y^ +z);
CHECK_AST("( +x:=y) xor +z", ( +x=y)^ +z);
CHECK_AST(" +(x):=y xor +z", +(x)=y^ +z);
CHECK_AST(" +(x:=y) xor +z", +(x=y)^ +z);
CHECK_AST(" +x:=(y) xor +z", +x=(y)^ +z);
CHECK_AST("( +x):=y xor -z", ( +x)=y^ -z);
CHECK_AST("( +x:=y) xor -z", ( +x=y)^ -z);
CHECK_AST(" +(x):=y xor -z", +(x)=y^ -z);
CHECK_AST(" +(x:=y) xor -z", +(x=y)^ -z);
CHECK_AST(" +x:=(y) xor -z", +x=(y)^ -z);
CHECK_AST("( +x):=y xor not z", ( +x)=y^ not z);
CHECK_AST("( +x:=y) xor not z", ( +x=y)^ not z);
CHECK_AST(" +(x):=y xor not z", +(x)=y^ not z);
CHECK_AST(" +(x:=y) xor not z", +(x=y)^ not z);
CHECK_AST(" +x:=(y) xor not z", +x=(y)^ not z);
CHECK_AST("( +x):= +y xor z", ( +x)= +y^z);
CHECK_AST("( +x:= +y) xor z", ( +x= +y)^z);
CHECK_AST(" +(x):= +y xor z", +(x)= +y^z);
CHECK_AST(" +(x:= +y) xor z", +(x= +y)^z);
CHECK_AST(" +x:=( +y) xor z", +x=( +y)^z);
CHECK_AST(" +x:= +(y) xor z", +x= +(y)^z);
CHECK_AST("( +x):= +y xor +z", ( +x)= +y^ +z);
CHECK_AST("( +x:= +y) xor +z", ( +x= +y)^ +z);
CHECK_AST(" +(x):= +y xor +z", +(x)= +y^ +z);
CHECK_AST(" +(x:= +y) xor +z", +(x= +y)^ +z);
CHECK_AST(" +x:=( +y) xor +z", +x=( +y)^ +z);
CHECK_AST(" +x:= +(y) xor +z", +x= +(y)^ +z);
CHECK_AST("( +x):= +y xor -z", ( +x)= +y^ -z);
CHECK_AST("( +x:= +y) xor -z", ( +x= +y)^ -z);
CHECK_AST(" +(x):= +y xor -z", +(x)= +y^ -z);
CHECK_AST(" +(x:= +y) xor -z", +(x= +y)^ -z);
CHECK_AST(" +x:=( +y) xor -z", +x=( +y)^ -z);
CHECK_AST(" +x:= +(y) xor -z", +x= +(y)^ -z);
CHECK_AST("( +x):= +y xor not z", ( +x)= +y^ not z);
CHECK_AST("( +x:= +y) xor not z", ( +x= +y)^ not z);
CHECK_AST(" +(x):= +y xor not z", +(x)= +y^ not z);
CHECK_AST(" +(x:= +y) xor not z", +(x= +y)^ not z);
CHECK_AST(" +x:=( +y) xor not z", +x=( +y)^ not z);
CHECK_AST(" +x:= +(y) xor not z", +x= +(y)^ not z);
CHECK_AST("( +x):= -y xor z", ( +x)= -y^z);
CHECK_AST("( +x:= -y) xor z", ( +x= -y)^z);
CHECK_AST(" +(x):= -y xor z", +(x)= -y^z);
CHECK_AST(" +(x:= -y) xor z", +(x= -y)^z);
CHECK_AST(" +x:=( -y) xor z", +x=( -y)^z);
CHECK_AST(" +x:= -(y) xor z", +x= -(y)^z);
CHECK_AST("( +x):= -y xor +z", ( +x)= -y^ +z);
CHECK_AST("( +x:= -y) xor +z", ( +x= -y)^ +z);
CHECK_AST(" +(x):= -y xor +z", +(x)= -y^ +z);
CHECK_AST(" +(x:= -y) xor +z", +(x= -y)^ +z);
CHECK_AST(" +x:=( -y) xor +z", +x=( -y)^ +z);
CHECK_AST(" +x:= -(y) xor +z", +x= -(y)^ +z);
CHECK_AST("( +x):= -y xor -z", ( +x)= -y^ -z);
CHECK_AST("( +x:= -y) xor -z", ( +x= -y)^ -z);
CHECK_AST(" +(x):= -y xor -z", +(x)= -y^ -z);
CHECK_AST(" +(x:= -y) xor -z", +(x= -y)^ -z);
CHECK_AST(" +x:=( -y) xor -z", +x=( -y)^ -z);
CHECK_AST(" +x:= -(y) xor -z", +x= -(y)^ -z);
CHECK_AST("( +x):= -y xor not z", ( +x)= -y^ not z);
CHECK_AST("( +x:= -y) xor not z", ( +x= -y)^ not z);
CHECK_AST(" +(x):= -y xor not z", +(x)= -y^ not z);
CHECK_AST(" +(x:= -y) xor not z", +(x= -y)^ not z);
CHECK_AST(" +x:=( -y) xor not z", +x=( -y)^ not z);
CHECK_AST(" +x:= -(y) xor not z", +x= -(y)^ not z);
CHECK_AST("( +x):= not y xor z", ( +x)= not y^z);
CHECK_AST("( +x:= not y) xor z", ( +x= not y)^z);
CHECK_AST(" +(x):= not y xor z", +(x)= not y^z);
CHECK_AST(" +(x:= not y) xor z", +(x= not y)^z);
CHECK_AST(" +x:=( not y) xor z", +x=( not y)^z);
CHECK_AST(" +x:= not (y) xor z", +x= not (y)^z);
CHECK_AST("( +x):= not y xor +z", ( +x)= not y^ +z);
CHECK_AST("( +x:= not y) xor +z", ( +x= not y)^ +z);
CHECK_AST(" +(x):= not y xor +z", +(x)= not y^ +z);
CHECK_AST(" +(x:= not y) xor +z", +(x= not y)^ +z);
CHECK_AST(" +x:=( not y) xor +z", +x=( not y)^ +z);
CHECK_AST(" +x:= not (y) xor +z", +x= not (y)^ +z);
CHECK_AST("( +x):= not y xor -z", ( +x)= not y^ -z);
CHECK_AST("( +x:= not y) xor -z", ( +x= not y)^ -z);
CHECK_AST(" +(x):= not y xor -z", +(x)= not y^ -z);
CHECK_AST(" +(x:= not y) xor -z", +(x= not y)^ -z);
CHECK_AST(" +x:=( not y) xor -z", +x=( not y)^ -z);
CHECK_AST(" +x:= not (y) xor -z", +x= not (y)^ -z);
CHECK_AST("( +x):= not y xor not z", ( +x)= not y^ not z);
CHECK_AST("( +x:= not y) xor not z", ( +x= not y)^ not z);
CHECK_AST(" +(x):= not y xor not z", +(x)= not y^ not z);
CHECK_AST(" +(x:= not y) xor not z", +(x= not y)^ not z);
CHECK_AST(" +x:=( not y) xor not z", +x=( not y)^ not z);
CHECK_AST(" +x:= not (y) xor not z", +x= not (y)^ not z);
CHECK_AST("( -x):=y xor z", ( -x)=y^z);
CHECK_AST("( -x:=y) xor z", ( -x=y)^z);
CHECK_AST(" -(x):=y xor z", -(x)=y^z);
CHECK_AST(" -(x:=y) xor z", -(x=y)^z);
CHECK_AST(" -x:=(y) xor z", -x=(y)^z);
CHECK_AST("( -x):=y xor +z", ( -x)=y^ +z);
CHECK_AST("( -x:=y) xor +z", ( -x=y)^ +z);
CHECK_AST(" -(x):=y xor +z", -(x)=y^ +z);
CHECK_AST(" -(x:=y) xor +z", -(x=y)^ +z);
CHECK_AST(" -x:=(y) xor +z", -x=(y)^ +z);
CHECK_AST("( -x):=y xor -z", ( -x)=y^ -z);
CHECK_AST("( -x:=y) xor -z", ( -x=y)^ -z);
CHECK_AST(" -(x):=y xor -z", -(x)=y^ -z);
CHECK_AST(" -(x:=y) xor -z", -(x=y)^ -z);
CHECK_AST(" -x:=(y) xor -z", -x=(y)^ -z);
CHECK_AST("( -x):=y xor not z", ( -x)=y^ not z);
CHECK_AST("( -x:=y) xor not z", ( -x=y)^ not z);
CHECK_AST(" -(x):=y xor not z", -(x)=y^ not z);
CHECK_AST(" -(x:=y) xor not z", -(x=y)^ not z);
CHECK_AST(" -x:=(y) xor not z", -x=(y)^ not z);
CHECK_AST("( -x):= +y xor z", ( -x)= +y^z);
CHECK_AST("( -x:= +y) xor z", ( -x= +y)^z);
CHECK_AST(" -(x):= +y xor z", -(x)= +y^z);
CHECK_AST(" -(x:= +y) xor z", -(x= +y)^z);
CHECK_AST(" -x:=( +y) xor z", -x=( +y)^z);