[meta] {
	[title] Sona, a new markup language
	[subtitle] Yes, another one.
	[author] Vince Mutolo
	[date] \today
}
[content] {
	// The `paragraph` environment knows to concatenate all the `TextBlock`s in its scope.
	[paragraph] {
		This is very interesting. Now, how do I ensure that this paragraph actually stays
		intact when I create a new environment? I want to create the environment *within*
		the paragraph. That's the tricky part.
		
		Now you can have as many line breaks as your heart desires.
	}
	[section] {
		[name] The Spec
		[code] {
			[lang] ebnf
			\raw##{
				scope = scope name, [whitespace], scope body, [whitespace];
				scope name = "[" , ident , "]";
				scope body = (scope explicit body | scope implicit body);
				scope explicit body = scope body open , { scope body contents } , scope body close;
				scope body contents = ? TODO ?;
				
				(*
				  *  Everything below here should probably be part of the lexer. The following rules
				  *  won't be context-free. They should be matched with higher rules having higher
            	  *  precedence.
				*)
				escaped pipe = "\|";
				escaped left brace = "\{";
				escaped right brace = "\}";
				escaped left bracket = "\[";
				escaped right bracket = "\]";
				ident = ident char, { ident char };
				ident char = codepoint - (whitespace | reserved);
				reserved = "{" | "}" | "[" | "]" | "|";
				codepoint = ? any valid UTF-8 codepoint ?;
				whitespace = ? a codepoint with Unicode Derived Core Property White_Space=yes ?;
				(* 
				  * Macros begin with "|ident{" and end with "}|", like: |math{a}| or |today{}|.
				  * Once the lexer identifies a MACRO_OPEN token, it must continue through the
				  * stream of bytes until it finds a MACRO_CLOSE with the same number of closing
				  * braces as the MACRO_OPEN has opening braces. Everything between the MACRO_NAME
				  * and MACRO_CLOSE must be considered part of the MACRO_BODY token.
				*) 
				macro = macro open, macro name, "{", { "{" } macro body, { "}" }, "}" macro close;
				macro open = "|";
				macro close = "|";
				macro name = ident;
				macro body = { codepoint }
				scope name open = "[";
				scope name close = "]";	
				scope body open = "{";
				scope body close = "}";	
			}##
			
		}
	}
	[section] {
		Let's try it out. Here's a mathematical equation.
		\t[ A^2 + B^2 + C^2 \leq \mathrm{hi} ]
		\macro_name#[today]#
		\m#{ A^2 + \frac{A}{B} }#
	}
	[section] {
		Here's how one might do a config file.
		[config] {
			[num_tries] 30
			[max_score] 100.0
			[waypoint] {
				[x] 10
				[y] -3
			}
		}
	}
}

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