String interpolation using the "b" prefix to build SQL statements. In general, the generated string is passed to "sqlBuilder.+=". When preceded by '\', the following characters have special meaning:

• '(': if(!skipParens) sqlBuilder += '('
• ')': if(!skipParens) sqlBuilder += ')'
• '[': Add a '(' plus newline and increase indentation
• '[': Decrease indentation and add a newline plus ')'
• '{': Like '[' but only if(!skipParens)
• '}': Like ']' but only if(!skipParens)
• 'n': Add a newline plus indentation

If 'slick.sqlIndent' is not set in application.conf, no newlines are inserted and indentation is replaced by a single space character.

Variables inside the string can be prefixed by another symbol before the standard '$' escape character to modify their meaning:

• '' (before a String variable s): sqlBuilder += quoteIdentifier(s)
• '' (before a Symbol variable s): sqlBuilder += symbolName(s)
• '!' (before a Node variable n): expr(n, true)
• no prefix (before a Node variable n): expr(n)
• no prefix (before a String variable s): sqlBuilder += s
• no prefix (before an AnyVal variable v): sqlBuilder += String.valueOf(v)

The identifiers sqlBuilder, skipParens, expr, quoteIdentifier and symbolName are resolved *dynamically* at the call site.