Scanner

Scanner, not slow, not fast.

class Scanner {

import std.stdio : File;;

import std.conv : to;;

import std.range : front, popFront, array, ElementType;;

import std.array : split;;

import std.traits : isSomeChar, isStaticArray, isArray;;

import std.algorithm : map;;

this(File f);

int unsafeRead(T x, Args args);

void read(Args args);

bool hasNext();

}

Constructors

this this(File f): f is source file

Members

Functions

hasNext bool hasNext(): Do file has next token?
read void read(Args args): Read tokens. If can't read, throw exception.
unsafeRead int unsafeRead(T x, Args args): Read tokens. Return the number of success read

Examples

import std.path : buildPath;
import std.file : tempDir;
import std.algorithm : equal;
import std.stdio : File;
string fileName = buildPath(tempDir, "kyuridenanmaida.txt");
auto fout = File(fileName, "w");
fout.writeln("1 2 3");
fout.writeln("ab cde");
fout.writeln("1.0 1.0 2.0");
fout.close;
Scanner sc = new Scanner(File(fileName, "r"));
int a;
int[2] b;
char[2] c;
string d;
double e;
double[] f;
sc.read(a, b, c, d, e, f);
assert(a == 1);
assert(equal(b[], [2, 3])); // array(except char) read whole line
assert(equal(c[], "ab")); // char array(char[], char[2], ...) return token
assert(equal(d, "cde")); // string is char array
assert(e == 1.0);
assert(equal(f, [1.0, 2.0]));
assert(!sc.hasNext);

Scanner

Constructors

Members

Functions

Examples

Meta

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