class

Ameba::AST::Variable

Represents the existence of the local variable. Holds the var node and variable assignments.

Constructors

new(node : Crystal::Var, scope : Ameba::AST::Scope)

Creates a new variable(in the scope).

Variable.new(node, scope)

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Instance methods

assign(node, scope)

Assigns the variable (creates a new assignment). Variable may have multiple assignments.

variable = Variable.new(node, scope)
variable.assign(node1)
variable.assign(node2)
variable.assignments.size # => 2

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assignments

List of the assignments of this variable.

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captured_by_block?(scope = @scope)

Returns true if the current var is referenced in the block. For example this variable is captured by block:

a = 1
3.times { |i| a = a + i }

And this variable is not captured by block.

i = 1
3.times { |i| i + 1 }

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end_location(*args, **options)

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end_location(*args, **options, &)

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eql?(node)

Returns true if the node represents exactly the same Crystal node as @node.

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ignored?

Returns true if the name starts with '_', false if not.

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location(*args, **options)

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location(*args, **options, &)

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name(*args, **options)

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name(*args, **options, &)

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node

The actual var node.

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reference(node : Crystal::Var, scope : Scope)

Creates a reference to this variable in some scope.

variable = Variable.new(node, scope)
variable.reference(var_node, some_scope)

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reference(scope : Scope)

Creates a reference to this variable in some scope.

variable = Variable.new(node, scope)
variable.reference(var_node, some_scope)

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referenced?

Returns true if variable has any reference.

variable = Variable.new(node, scope)
variable.reference(var_node, some_scope)
variable.referenced? # => true

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references

List of the references of this variable.

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scope

Scope of this variable.

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special?

Returns true if it is a special variable, i.e $?.

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target_of?(assign)

Returns true if the variable is a target (on the left) of the assignment, false otherwise.

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to_s(*args, **options)

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to_s(*args, **options, &)

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used_in_macro?(scope = @scope)

Returns true if current variable potentially referenced in a macro, false if not.

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