46 lines
1.1 KiB
Go
46 lines
1.1 KiB
Go
package core
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import (
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"git.urbach.dev/cli/q/src/cpu"
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"git.urbach.dev/cli/q/src/errors"
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"git.urbach.dev/cli/q/src/token"
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)
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// ExecuteToken performs an operation on a register with the given leaf operand.
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func (f *Function) ExecuteToken(operation token.Token, register cpu.Register, operand token.Token) error {
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switch operand.Kind {
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case token.Identifier:
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name := operand.Text(f.File.Bytes)
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variable := f.VariableByName(name)
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if variable == nil {
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return errors.New(&errors.UnknownIdentifier{Name: name}, f.File, operand.Position)
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}
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defer f.UseVariable(variable)
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return f.ExecuteRegisterRegister(operation, register, variable.Value.Register)
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case token.Number, token.Rune:
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number, err := f.ToNumber(operand)
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if err != nil {
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return err
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}
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return f.ExecuteRegisterNumber(operation, register, number)
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case token.String:
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if operation.Kind == token.Assign {
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value, err := f.EvaluateToken(operand)
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if err != nil {
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return err
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}
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f.ValueToRegister(value, register)
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return err
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}
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}
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return errors.New(errors.NotImplemented, f.File, operation.Position)
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}
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