wehub-resource-sync
43 lines
969 B
Go
43 lines
969 B
Go
package parser
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import (
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"fmt"
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"io"
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"github.com/kashav/fsql/tokenizer"
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)
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// ErrUnexpectedToken represents an unexpected token error.
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type ErrUnexpectedToken struct {
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Actual tokenizer.TokenType
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Expected tokenizer.TokenType
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}
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func (e *ErrUnexpectedToken) Error() string {
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return fmt.Sprintf("expected %s; got %s", e.Expected.String(),
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e.Actual.String())
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}
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// ErrUnknownToken represents an unknown token error.
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type ErrUnknownToken struct {
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Raw string
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}
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func (e *ErrUnknownToken) Error() string {
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return fmt.Sprintf("unknown token: %s", e.Raw)
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}
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// currentError returns the current error, based on the parser's current Token
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// and the previously expected TokenType (set in parser.expect).
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func (p *parser) currentError() error {
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if p.current == nil {
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return io.ErrUnexpectedEOF
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}
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if p.current.Type == tokenizer.Unknown {
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return &ErrUnknownToken{Raw: p.current.Raw}
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}
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return &ErrUnexpectedToken{Actual: p.current.Type, Expected: p.expected}
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}
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