44 lines
942 B
Go
44 lines
942 B
Go
package commands
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import (
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"fmt"
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"strings"
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"c65gm/internal/compiler"
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"c65gm/internal/preproc"
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"c65gm/internal/utils"
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)
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// SubEndCommand handles SUBEND/EXIT statements
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// Syntax: SUBEND (no parameters)
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//
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// EXIT (no parameters)
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//
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// Generates RTS (return from subroutine)
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type SubEndCommand struct{}
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func (c *SubEndCommand) WillHandle(line preproc.Line) bool {
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params, err := utils.ParseParams(line.Text)
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if err != nil || len(params) == 0 {
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return false
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}
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keyword := strings.ToUpper(params[0])
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return keyword == "SUBEND" || keyword == "EXIT"
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}
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func (c *SubEndCommand) Interpret(line preproc.Line, _ *compiler.CompilerContext) error {
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params, err := utils.ParseParams(line.Text)
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if err != nil {
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return err
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}
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if len(params) != 1 {
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return fmt.Errorf("SUBEND: no parameters allowed")
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}
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return nil
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}
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func (c *SubEndCommand) Generate(_ *compiler.CompilerContext) ([]string, error) {
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return []string{"\trts"}, nil
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}
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