Simple function call
"Today is $$date"
/Today is RX_DATE/
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Function call with colon parameter
"Square root of 225 is $$isqrt:225"
/is 15$/
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Function call with empty colon parameter
"Calculate $$isqrt:"
/Error evaluating/
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Function call with empty bracket parameter
"Calculate $$isqrt[]"
/Error evaluating/
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Function detects invalid bracket parameter
"Calculate $$isqrt[3a5]"
/Error evaluating/
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Function call followed by comma
"Today is $$date, I think"
/Today is RX_DATE, I think/
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Undefined function
"I am calling an $$unknown.function here"
/evaluating/
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Functions date, time, pwd
"Today is $$date at $$time, and I am in $$pwd"
/Today is RX_DATE at RX_TIME, and I am in RX_PATH/
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Function detects missing parameter
"Here I call $$reverse with no parameters"
"Here I call (reverse: No parameter) with no parameters"
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Simple function test
"'animal' spelled backwards is '$$reverse[animal]'"
"'animal' spelled backwards is 'lamina'"
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Simple function with colon parameter
"'lamina' spelled backwards is $$reverse:lamina"
"'lamina' spelled backwards is animal"
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Variable inside function bracket parameter
init: @live.api.setvar(:whatever, "some var value")
"$whatever backwards is $$reverse[$whatever]"
"some var value backwards is eulav rav emos"
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Function with variable in colon param is nonhygienic
init: @live.api.setvar(:whatever, "some var value")
"Like non-hygienic macros: $whatever backwards != $$reverse:$whatever"
"Like non-hygienic macros: some var value backwards != emos var value"
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Function call with variable in bracket param
"User $User backwards is $$reverse[$User]"
/User RX_USER backwards is RX_USER$/
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