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// SDLang-D
// Written in the D programming language.
module sdlang.util;
import std.algorithm;
import std.array;
import std.conv;
import std.datetime;
import std.range;
import std.stdio;
import std.string;
import sdlang.exception;
import sdlang.token;
enum sdlangVersion = "0.9.1";
alias immutable(ubyte)[] ByteString;
auto startsWith(T)(string haystack, T needle)
if( is(T:ByteString) || is(T:string) )
{
return std.algorithm.startsWith( cast(ByteString)haystack, cast(ByteString)needle );
}
struct Location
{
string file; /// Filename (including path)
int line; /// Zero-indexed
int col; /// Zero-indexed, Tab counts as 1
size_t index; /// Index into the source
this(int line, int col, int index)
{
this.line = line;
this.col = col;
this.index = index;
}
this(string file, int line, int col, int index)
{
this.file = file;
this.line = line;
this.col = col;
this.index = index;
}
/// Convert to string. Optionally takes output range as a sink.
string toString()
{
Appender!string sink;
this.toString(sink);
return sink.data;
}
///ditto
void toString(Sink)(ref Sink sink) if(isOutputRange!(Sink,char))
{
sink.put(file);
sink.put("(");
sink.put(to!string(line+1));
sink.put(":");
sink.put(to!string(col+1));
sink.put(")");
}
}
struct FullName
{
string namespace;
string name;
/// Convert to string. Optionally takes output range as a sink.
string toString()
{
if(namespace == "")
return name;
Appender!string sink;
this.toString(sink);
return sink.data;
}
///ditto
void toString(Sink)(ref Sink sink) if(isOutputRange!(Sink,char))
{
if(namespace != "")
{
sink.put(namespace);
sink.put(":");
}
sink.put(name);
}
///
static string combine(string namespace, string name)
{
return FullName(namespace, name).toString();
}
///
@("FullName.combine example")
unittest
{
assert(FullName.combine("", "name") == "name");
assert(FullName.combine("*", "name") == "*:name");
assert(FullName.combine("namespace", "name") == "namespace:name");
}
///
static FullName parse(string fullName)
{
FullName result;
auto parts = fullName.findSplit(":");
if(parts[1] == "") // No colon
{
result.namespace = "";
result.name = parts[0];
}
else
{
result.namespace = parts[0];
result.name = parts[2];
}
return result;
}
///
@("FullName.parse example")
unittest
{
assert(FullName.parse("name") == FullName("", "name"));
assert(FullName.parse("*:name") == FullName("*", "name"));
assert(FullName.parse("namespace:name") == FullName("namespace", "name"));
}
/// Throws with appropriate message if this.name is "*".
/// Wildcards are only supported for namespaces, not names.
void ensureNoWildcardName(string extaMsg = null)
{
if(name == "*")
throw new ArgumentException(`Wildcards ("*") only allowed for namespaces, not names. `~extaMsg);
}
}
struct Foo { string foo; }
void removeIndex(E)(ref E[] arr, ptrdiff_t index)
{
arr = arr[0..index] ~ arr[index+1..$];
}
void trace(string file=__FILE__, size_t line=__LINE__, TArgs...)(TArgs args)
{
version(sdlangTrace)
{
writeln(file, "(", line, "): ", args);
stdout.flush();
}
}
string toString(TypeInfo ti)
{
if (ti == typeid( bool )) return "bool";
else if(ti == typeid( string )) return "string";
else if(ti == typeid( dchar )) return "dchar";
else if(ti == typeid( int )) return "int";
else if(ti == typeid( long )) return "long";
else if(ti == typeid( float )) return "float";
else if(ti == typeid( double )) return "double";
else if(ti == typeid( real )) return "real";
else if(ti == typeid( Date )) return "Date";
else if(ti == typeid( DateTimeFrac )) return "DateTimeFrac";
else if(ti == typeid( DateTimeFracUnknownZone )) return "DateTimeFracUnknownZone";
else if(ti == typeid( SysTime )) return "SysTime";
else if(ti == typeid( Duration )) return "Duration";
else if(ti == typeid( ubyte[] )) return "ubyte[]";
else if(ti == typeid( typeof(null) )) return "null";
return "{unknown}";
}
enum BOM {
UTF8, /// UTF-8
UTF16LE, /// UTF-16 (little-endian)
UTF16BE, /// UTF-16 (big-endian)
UTF32LE, /// UTF-32 (little-endian)
UTF32BE, /// UTF-32 (big-endian)
}
enum NBOM = __traits(allMembers, BOM).length;
immutable ubyte[][NBOM] ByteOrderMarks =
[
[0xEF, 0xBB, 0xBF], //UTF8
[0xFF, 0xFE], //UTF16LE
[0xFE, 0xFF], //UTF16BE
[0xFF, 0xFE, 0x00, 0x00], //UTF32LE
[0x00, 0x00, 0xFE, 0xFF] //UTF32BE
];
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