Lexical elements and literals

Forms that compile (10)

Syntax	Description
1L / 1U / 1UL	Integer suffixes
1.5f / 1.5d / 1.5m	Floating-point suffixes
0xFF / 0b1010	Hex and binary notation
1_000_000	Digit separators
'\n' / '\u0041'	Character escapes
"a\tb\"c"	String escapes
@"a\b"	Verbatim string literals
int 値 = 1;	Japanese identifiers
int @class = 1;	Identifiers that match a reserved word
// と /* */	Comments

Numbers

Integer suffixes

using UnityEngine;
using Tsukimi;

public class LexIntegerSuffix : TsukimiBehaviour
{
    void Start()
    {
        long a = 1L;
        uint b = 1U;
        ulong c = 1UL;
        Debug.Log(a + b + (long)c);   // => 3
    }
}

Floating-point suffixes

using UnityEngine;
using Tsukimi;

public class LexFloatSuffix : TsukimiBehaviour
{
    void Start()
    {
        float a = 1.5f;
        double b = 1.5d;
        decimal c = 1.5m;
        Debug.Log(a + b + (double)c);   // => 4.5
    }
}

Hex and binary notation

using UnityEngine;
using Tsukimi;

public class LexHexAndBinary : TsukimiBehaviour
{
    void Start()
    {
        int a = 0xFF;
        int b = 0b1010;
        Debug.Log(a + b);   // => 265
    }
}

Digit separators

using UnityEngine;
using Tsukimi;

public class LexDigitSeparator : TsukimiBehaviour
{
    void Start()
    {
        int a = 1_000_000;
        Debug.Log(a);   // => 1000000
    }
}

Characters and strings

Character escapes

using UnityEngine;
using Tsukimi;

public class LexCharEscape : TsukimiBehaviour
{
    void Start()
    {
        char a = '\n';
        char b = '\u0041';
        Debug.Log(a + b);   // => 75
    }
}

String escapes

using UnityEngine;
using Tsukimi;

public class LexStringEscape : TsukimiBehaviour
{
    void Start()
    {
        string s = "a\tb\"c";
        Debug.Log(s);   // => "a\tb"c"
    }
}

Verbatim string literals

using UnityEngine;
using Tsukimi;

public class LexVerbatimString : TsukimiBehaviour
{
    void Start()
    {
        string s = @"a\b";
        Debug.Log(s);   // => "a\\b"
    }
}

Names and comments

Japanese identifiers

using UnityEngine;
using Tsukimi;

public class LexUnicodeIdentifier : TsukimiBehaviour
{
    void Start()
    {
        int 値 = 1;
        Debug.Log(値);   // => 1
    }
}

Identifiers that match a reserved word

using UnityEngine;
using Tsukimi;

public class LexKeywordIdentifier : TsukimiBehaviour
{
    void Start()
    {
        int @class = 1;
        Debug.Log(@class);   // => 1
    }
}

Comments

// runs to the end of the line; /* */ runs until */. Comments can’t nest — the first */ closes it, and anything after that is read as an expression.

using UnityEngine;
using Tsukimi;

public class LexComment : TsukimiBehaviour
{
    void Start()
    {
        // line comment
        /* block comment */
        Debug.Log(1);   // => 1
    }
}