Template:Eval
From TrainzOnline
{{{{{subst|}}}#expr:{{{1}}}}}
Normal evaluation:
- {{eval|3/4}} gives {{#if:{{#ifexpr:3/4}}|[expression "3/4" is wrong]|{{#expr:3/4}}}}.
- {{eval|3*4}} gives {{#if:{{#ifexpr:3*4}}|[expression "3*4" is wrong]|{{#expr:3*4}}}}.
- {{eval|3+4}} gives {{#if:{{#ifexpr:3+4}}|[expression "3+4" is wrong]|{{#expr:3+4}}}}.
- {{eval|3-4}} gives {{#if:{{#ifexpr:3-4}}|[expression "3-4" is wrong]|{{#expr:3-4}}}}.
- {{eval|3 mod 4}} gives {{#if:{{#ifexpr:3 mod 4}}|[expression "3 mod 4" is wrong]|{{#expr:3 mod 4}}}}.
Error handling:
- {{eval|3/0}} gives {{#if:{{#ifexpr:3/0}}|[expression "3/0" is wrong]|{{#expr:3/0}}}} (division by 0 is undefined)
Nested error message:
- {{eval|1+{{eval|3/0}}}} gives {{#if:{{#ifexpr:1+{{#if:{{#ifexpr:3/0}}|[expression "3/0" is wrong]|{{#expr:3/0}}}}}}|[expression "1+{{#if:{{#ifexpr:3/0}}|[expression "3/0" is wrong]|{{#expr:3/0}}}}" is wrong]|{{#expr:1+{{#if:{{#ifexpr:3/0}}|[expression "3/0" is wrong]|{{#expr:3/0}}}}}}}}.
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