TJSONScanner¶

JSON lexical scanner

Declaration¶

Source position: jsonscanner.pp line 75

type

  TJSONScanner = class
  public
    constructor Create(Source: TStream; AUseUTF8: Boolean=True); overload;
    constructor Create(Source: TStream; AOptions: TJSONOptions); overload;
    constructor Create(const aSource: RawByteString; AUseUTF8: Boolean=True); overload;
    constructor Create(const aSource: RawByteString; AOptions: TJSONOptions); overload;
    function FetchToken : TJSONToken;
    property CurLine: Ansistring; {r}
    property CurRow: Integer; {r}
    property CurColumn: Integer; {r}
    property AbsolutePos: Integer; {r}
    property CurToken: TJSONToken; {r}
    property CurTokenString: Ansistring; {r}
    property Strict: Boolean; {rw}
    property UseUTF8: Boolean; {rw}
    property Options: TJSONOptions; {rw}
  end;

Inheritance¶

Description¶

Lexical scanner class that tokenizes JSON text input. Breaks JSON source into discrete tokens for subsequent parsing by higher-level parsers. Supports various scanning options through TJSONOptions.

Properties¶

Member	Visibility	Description
AbsolutePos read only	public	Absolute character position
CurColumn read only	public	Current column number
CurLine read only	public	Current line content
CurRow read only	public	Current row number
CurToken read only	public	Current token type
CurTokenString read only	public	Current token string value
Options	public	Scanner options set
Strict	public	Strict JSON parsing mode
UseUTF8	public	UTF-8 encoding mode

Methods¶

Member	Visibility	Description
Create	public	Create JSON scanner instance
FetchToken	public	Fetch next token from input

Errors¶

Raises EScannerError when encountering invalid JSON syntax or characters.

Name	Description
TJSONToken	JSON token types
TJSONOptions	Set of JSON scanner options
EScannerError	JSON scanner exception