85 lines
1.9 KiB
Go
85 lines
1.9 KiB
Go
package lexer
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import "github.com/sashakoshka/arf/file"
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// TokenKind is an enum represzenting what role a token has.
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type TokenKind int
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const (
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TokenKindNewline TokenKind = iota
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TokenKindIndent
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TokenKindSeparator
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TokenKindPermission
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TokenKindReturnDirection
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TokenKindInt
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TokenKindFloat
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TokenKindString
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TokenKindRune
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TokenKindName
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TokenKindSymbol
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TokenKindColon
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TokenKindDot
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TokenKindLBracket
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TokenKindRBracket
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TokenKindLBrace
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TokenKindRBrace
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TokenKindPlus
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TokenKindMinus
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TokenKindAsterisk
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TokenKindSlash
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TokenKindAt
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TokenKindExclamation
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TokenKindPercent
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TokenKindTilde
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TokenKindLessThan
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TokenKindLShift
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TokenKindGreaterThan
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TokenKindRShift
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TokenKindBinaryOr
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TokenKindLogicalOr
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TokenKindBinaryAnd
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TokenKindLogicalAnd
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)
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// Token represents a single token. It holds its location in the file, as well
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// as a value and some semantic information defining the token's role.
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type Token struct {
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kind TokenKind
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location file.Location
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value any
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}
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// Kind returns the semantic role of the token.
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func (token Token) Kind () (kind TokenKind) {
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return token.kind
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}
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// Is returns whether or not the token is of kind kind.
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func (token Token) Is (kind TokenKind) (match bool) {
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return token.kind == kind
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}
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// Value returns the value of the token. Depending on what kind of token it is,
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// this value may be nil.
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func (token Token) Value () (value any) {
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return token.value
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}
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// Equals returns whether this token is equal to another token
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func (token Token) Equals (testToken Token) (match bool) {
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return token == testToken
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}
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// Location returns the location of the token in its file.
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func (token Token) Location () (location file.Location) {
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return token.location
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}
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