DIP 1026---Deprecate Context-Sensitive String Literals---Community Review Round 1

[Kagamin]

On Tuesday, 3 December 2019 at 12:38:29 UTC, Andrei Alexandrescu 
wrote:
> This DIP is a non-starter. Here documents are easily and 
> effectively handled during lexing and have no impact on the 
> language grammar.

In a compiler.

Here's an implementation for bash heredoc strings, say something 
nice about it:

---
class HereDocCls {	// Class to manage HERE document elements
public:
	int State;		// 0: '<<' encountered
	// 1: collect the delimiter
	// 2: here doc text (lines after the delimiter)
	int Quote;		// the char after '<<'
	bool Quoted;		// true if Quote in ('\'','"','`')
	bool Indent;		// indented delimiter (for <<-)
	int DelimiterLength;	// strlen(Delimiter)
	char *Delimiter;	// the Delimiter, 256: sizeof PL_tokenbuf
	HereDocCls() {
		State = 0;
		Quote = 0;
		Quoted = false;
		Indent = 0;
		DelimiterLength = 0;
		Delimiter = new char[HERE_DELIM_MAX];
		Delimiter[0] = '\0';
	}
	void Append(int ch) {
		Delimiter[DelimiterLength++] = static_cast<char>(ch);
		Delimiter[DelimiterLength] = '\0';
	}
	~HereDocCls() {
		delete []Delimiter;
	}
};
HereDocCls HereDoc;
---