22 lines
677 B
Rust
22 lines
677 B
Rust
pub(crate) fn term_contains_variable(term: &foliage::Term,
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variable_declaration: &foliage::VariableDeclaration)
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-> bool
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{
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use foliage::Term;
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match term
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{
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Term::BinaryOperation(binary_operation) =>
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term_contains_variable(&binary_operation.left, variable_declaration)
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|| term_contains_variable(&binary_operation.right, variable_declaration),
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Term::Boolean(_)
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| Term::Function(_)
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| Term::Integer(_)
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| Term::SpecialInteger(_)
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| Term::String(_) => false,
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Term::UnaryOperation(unary_operation) =>
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term_contains_variable(&unary_operation.argument, variable_declaration),
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Term::Variable(variable) => *variable.declaration == *variable_declaration,
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}
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}
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