Wikipedia:ParserFunction precursors

{{qif}}
{{{else{{{test|}}}|{{{test{{{test|}}}|{{{then|}}}}}}}}}
{{qif|test=A|then=X|else=Y}}	{{#if|A|X|Y}}
{{if}}
{{show1 |1={{{2|{{{then|}}}}}} |1{{{1|{{{test|}}}}}}={{{3|{{{else|}}}}}} }} {{show1}} {{{1}}}
{{if|test=A|then=X|else=Y}}	{{#if|A|X|Y}}

The following templates are meant to be included as conditions (sample use: {{qif|test={{boolxor|A|B}}|then=X|else=Y}}):

{{booleq}} (A and B are equal)
{{booleq/eq2|{{{1}}}=1|@={{{2}}}}} {{booleq/eq2}} {{{{{{@}}}|}}}
{{qif|test={{booleq|A|B}}|then=X|else=Y}}	{{#ifeq:A|B|X|Y}}
{{boolne}} (A and B are not equal)
{{boolnot|{{booleq|{{{1}}}|{{{2}}}}}}}
{{qif|test={{boolne|A|B}}|then=X|else=Y}}	{{#ifeq:A|B|Y|X}}
{{booland}} (A and B are not empty)
{{qif |test={{{1|}}} |then={{qif |test={{{2|}}} |then=1 |else= }} |else= }}
{{qif|test={{boolxor|A|B}}|then=X|else=Y}}	{{#if:{{#if:A||1}}{{#if:B||1}}|Y|X}} {{#ifeq:{{#if:A|1}}{{#if:B|1}}|11|X|Y}}
{{boolor}} (A, B, or both are not empty)
{{qif |test={{{1|}}}{{{2|}}} |then=1 }}
{{qif|test={{boolor|A|B}}|then=X|else=Y}}	{{#if:AB|X|Y}}
{{boolnot}} (A is empty)
{{qif |test={{{1|}}} |then= |else=1 }}
{{qif|test={{boolnot|A}}|then=X|else=Y}}	{{#if:A|Y|X}}
{{boolxor}} (A or B is empty, but not both)
{{qif |test={{{1|}}} |then={{qif |test={{{2|}}} |then= |else=1 }} |else={{qif |test={{{2|}}} |then=1 |else= }} }}
{{qif|test={{boolxor|A|B}}|then=X|else=Y}}	{{#ifeq:{{#if:A|1}}{{#if:B|1}}|1|X|Y}}