47 lines
700 B
Go
47 lines
700 B
Go
package token
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type TokenType string
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type Loc struct {
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Line int
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Col int
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}
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type Token struct {
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Token TokenType
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Literal string
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Loc Loc
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}
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const (
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Illegal TokenType = "Illegal"
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Eof = "Eof"
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EndLine = "EndLine"
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Semicolon = "Semicolon" // ;
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Colon = "Colon" // :
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Equal = "Equal" // =
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LBrace = "LBrace" // {
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RBrace = "RBrace" // }
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LParen = "LParen" // (
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RParen = "RParen" // )
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Identifier = "Identifier"
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// Keywords
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Fn = "Fn" // fn
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)
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var stringToToken = map[string]TokenType{
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"fn": Fn,
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}
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func LookupKeyword(literal string) TokenType {
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if token, ok := stringToToken[literal]; ok {
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return token
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}
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return Identifier
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}
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