# testing mixture of strings and expressions
Attribute value: abc
Parses to: abc
Attribute value: ${ 3}
Parses to: ${3}
Attribute value: a${
Causes an error: An error occurred while parsing custom action attribute "test" with value "a${": Encountered "<EOF>", expected one of [<INTEGER_LITERAL>, <FLOATING_POINT_LITERAL>, <STRING_LITERAL>, "true", "false", "null", "(", "-", "not", "!", "empty", <IDENTIFIER>]
Attribute value: a${ 5 }
Parses to: a${5}
Attribute value: ${ 3 }b
Parses to: ${3}b
Attribute value: ${ 1 }${ 2 }
Parses to: ${1}${2}
Attribute value: abc ${ 1} ${ 2} def
Parses to: abc ${1} ${2} def

# testing values that end with or contain "$"
Attribute value: $
Parses to: $
Attribute value: \$
Parses to: \$
Attribute value:   $  
Parses to:   $  
Attribute value: test$
Parses to: test$
Attribute value: $test
Parses to: $test
Attribute value: test$test
Parses to: test$test
Attribute value: test$$$
Parses to: test$$$
Attribute value: test$$${ 34 }
Parses to: test$$${34}
Attribute value: test$$${ 34 }$$
Parses to: test$$${34}$$
Attribute value: test$${ 34 }
Parses to: test$${34}
Attribute value: $${ 34 }
Parses to: $${34}
Attribute value: $$
Parses to: $$
Attribute value: test$$
Parses to: test$$
Attribute value: test$$test
Parses to: test$$test
Attribute value: ${ 34 }$${ 34 }
Parses to: ${34}$${34}

# literals
Attribute value: ${1}
Parses to: ${1}
Attribute value: ${-12}
Parses to: ${(- 12)}
Attribute value: ${true}
Parses to: ${true}
Attribute value: ${false}
Parses to: ${false}
Attribute value: ${null}
Parses to: ${null}
Attribute value: ${4.2}
Parses to: ${4.2}
Attribute value: ${-21.3}
Parses to: ${(- 21.3)}
Attribute value: ${4.}
Parses to: ${4.0}
Attribute value: ${.21}
Parses to: ${0.21}
Attribute value: ${3e-1}
Parses to: ${0.3}
Attribute value: ${.2222222222}
Parses to: ${0.2222222222}

# string literals with "
Attribute value: ${"abc"}
Parses to: ${"abc"}
Attribute value: ${""}
Parses to: ${""}
Attribute value: ${"a"}
Parses to: ${"a"}
Attribute value: ${"         "}
Parses to: ${"         "}
Attribute value: ${" some string ''' "}
Parses to: ${" some string ''' "}
Attribute value: ${" with escaping \\"}
Parses to: ${" with escaping \\"}
Attribute value: ${" with escaping \""}
Parses to: ${" with escaping \""}
Attribute value: ${" with escaping \"\\\""}
Parses to: ${" with escaping \"\\\""}
Attribute value: ${" bad \ escaping"}
Causes an error: An error occurred while parsing custom action attribute "test" with value "${" bad \ escaping"}": Encountered "" bad \ ", expected one of [<INTEGER_LITERAL>, <FLOATING_POINT_LITERAL>, <STRING_LITERAL>, "true", "false", "null", "(", "-", "not", "!", "empty", <IDENTIFIER>]
Attribute value: ${" bad \' escaping"}
Causes an error: An error occurred while parsing custom action attribute "test" with value "${" bad \' escaping"}": Encountered "" bad \'", expected one of [<INTEGER_LITERAL>, <FLOATING_POINT_LITERAL>, <STRING_LITERAL>, "true", "false", "null", "(", "-", "not", "!", "empty", <IDENTIFIER>]

# string literals with '
Attribute value: ${'abc'}
Parses to: ${"abc"}
Attribute value: ${''}
Parses to: ${""}
Attribute value: ${'a'}
Parses to: ${"a"}
Attribute value: ${'         '}
Parses to: ${"         "}
Attribute value: ${' some string """ '}
Parses to: ${" some string \"\"\" "}
Attribute value: ${' with escaping \\'}
Parses to: ${" with escaping \\"}
Attribute value: ${' with escaping \''}
Parses to: ${" with escaping '"}
Attribute value: ${' with escaping \'\\\''}
Parses to: ${" with escaping '\\'"}
Attribute value: ${' bad \ escaping'}
Causes an error: An error occurred while parsing custom action attribute "test" with value "${' bad \ escaping'}": Encountered "' bad \ ", expected one of [<INTEGER_LITERAL>, <FLOATING_POINT_LITERAL>, <STRING_LITERAL>, "true", "false", "null", "(", "-", "not", "!", "empty", <IDENTIFIER>]
Attribute value: ${' bad \" escaping'}
Causes an error: An error occurred while parsing custom action attribute "test" with value "${' bad \" escaping'}": Encountered "' bad \"", expected one of [<INTEGER_LITERAL>, <FLOATING_POINT_LITERAL>, <STRING_LITERAL>, "true", "false", "null", "(", "-", "not", "!", "empty", <IDENTIFIER>]

# identifiers
Attribute value: ${abc}
Parses to: ${abc}
Attribute value: ${abc123}
Parses to: ${abc123}
Attribute value: ${abc_123}
Parses to: ${abc_123}
Attribute value: ${bad*identifier}
Parses to: ${(bad * identifier)}

# property accessors
Attribute value: ${a .b .c}
Parses to: ${a.b.c}
Attribute value: ${ abc . 'def.ghi' . ghi . "jkl \"" }
Causes an error: An error occurred while parsing custom action attribute "test" with value "${ abc . 'def.ghi' . ghi . "jkl \"" }": Encountered "'def.ghi'", expected one of [<IDENTIFIER>]

# array accessors
Attribute value: ${ a[14] }
Parses to: ${a[14]}
Attribute value: ${ abc [def]}
Parses to: ${abc[def]}
Attribute value: ${ def ["yesthisisallowed"]}
Parses to: ${def["yesthisisallowed"]}

# mixed property/array accessors
Attribute value: ${ a.b.c[d. e.  f]}
Parses to: ${a.b.c[d.e.f]}
Attribute value: ${ a[14].b[32].c[24][ 261] [24]}
Parses to: ${a[14].b[32].c[24][261][24]}
Attribute value: ${ a[b[c[d[e[f]]]].g] }
Parses to: ${a[b[c[d[e[f]]]].g]}

# mixed operators
Attribute value: ${ 1 + 3 - 2 * 1 == 4}
Parses to: ${((1 + 3 - (2 * 1)) == 4)}
Attribute value: ${ 1 + 3 - 2 * 1 == 4 / 1.2}
Parses to: ${((1 + 3 - (2 * 1)) == (4 / 1.2))}
Attribute value: ${ 1 + 3 - 2 * 1 == 4 / 1.2 and abc}
Parses to: ${(((1 + 3 - (2 * 1)) == (4 / 1.2)) and abc)}
Attribute value: ${ 1 + 3 - 2 * 1 == 4 / 1.2 and abc or def or ghi and true}
Parses to: ${((((1 + 3 - (2 * 1)) == (4 / 1.2)) and abc) or def or (ghi and true))}

# unary operators
Attribute value: ${ --not abc.def }
Parses to: ${(- - not abc.def)}

# array accessors of non-integer types
Attribute value: ${  a ["hello"]."12" [17.5] }
Causes an error: An error occurred while parsing custom action attribute "test" with value "${  a ["hello"]."12" [17.5] }": Encountered ""12"", expected one of [<IDENTIFIER>]

# making sure unicode escapes are not recognized
Attribute value: \u0040
Parses to: \u0040
Attribute value: "\u0040"
Parses to: "\u0040"

# relational operators
Attribute value: ${ a > b }
Parses to: ${(a > b)}
Attribute value: ${ a gt b }
Parses to: ${(a > b)}
Attribute value: ${ a < b }
Parses to: ${(a < b)}
Attribute value: ${ a lt b }
Parses to: ${(a < b)}
Attribute value: ${ a >= b }
Parses to: ${(a >= b)}
Attribute value: ${ a ge b }
Parses to: ${(a >= b)}
Attribute value: ${ a <= b }
Parses to: ${(a <= b)}
Attribute value: ${ a le b }
Parses to: ${(a <= b)}
Attribute value: ${ a == b }
Parses to: ${(a == b)}
Attribute value: ${ a eq b }
Parses to: ${(a == b)}
Attribute value: ${ a != b }
Parses to: ${(a != b)}
Attribute value: ${ a ne b }
Parses to: ${(a != b)}

# logical operators
Attribute value: ${ a and b}
Parses to: ${(a and b)}
Attribute value: ${ a && b}
Parses to: ${(a and b)}
Attribute value: ${ a or b}
Parses to: ${(a or b)}
Attribute value: ${ a || b}
Parses to: ${(a or b)}
Attribute value: ${ !a }
Parses to: ${(not a)}
Attribute value: ${ not a }
Parses to: ${(not a)}

# empty operator
Attribute value: ${ empty "A"}
Parses to: ${(empty "A")}
Attribute value: ${ empty "" }
Parses to: ${(empty "")}
Attribute value: ${ empty null }
Parses to: ${(empty null)}
Attribute value: ${ empty false}
Parses to: ${(empty false)}
Attribute value: ${ empty 0}
Parses to: ${(empty 0)}
Attribute value: ${ not empty 0}
Parses to: ${(not empty 0)}
Attribute value: ${ not empty empty 0}
Parses to: ${(not empty empty 0)}
Attribute value: ${ empty }
Causes an error: An error occurred while parsing custom action attribute "test" with value "${ empty }": Encountered "}", expected one of [<INTEGER_LITERAL>, <FLOATING_POINT_LITERAL>, <STRING_LITERAL>, "true", "false", "null", "(", "-", "not", "!", "empty", <IDENTIFIER>]

# functions
Attribute value: ${a()}
Parses to: ${a()}
Attribute value: ${ a() }
Parses to: ${a()}
Attribute value: ${a(b)}
Parses to: ${a(b)}
Attribute value: ${ a(b) }
Parses to: ${a(b)}
Attribute value: ${a(b,c)}
Parses to: ${a(b, c)}
Attribute value: ${a(b,c,d)}
Parses to: ${a(b, c, d)}
Attribute value: ${a:b(c)}
Parses to: ${a:b(c)}
Attribute value: ${a:b(c,d)}
Parses to: ${a:b(c, d)}
Attribute value: ${a:b(c,d,e)}
Parses to: ${a:b(c, d, e)}
Attribute value: ${a(b).c}
Parses to: ${a(b).c}
Attribute value: ${a(b)[c]}
Parses to: ${a(b)[c]}
Attribute value: ${a[b()]}
Parses to: ${a[b()]}

# non-ascii input - the parser automatically translates the @@non-ascii
# into a UNICODE string with value \u1111
Attribute value: ?
Parses to: ?