62 lines
1.0 KiB
Go
62 lines
1.0 KiB
Go
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package rsql
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// Tokens for RSQL FIQL
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const (
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TokIllegal = "TokIllegal"
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TokEOF = "TokEOF"
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TokIdent = "TokIdent"
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TokInteger = "TokInteger"
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TokString = "TokString"
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TokFloat = "TokFloat"
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TokExtend = "TokExtend"
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TokLParen = "("
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TokRParen = ")"
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TokLBracket = "["
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TokRBracket = "]"
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TokLIKE = "~"
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TokNLIKE= "!~"
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TokNOT = "!"
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TokLT = "<"
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TokGT = ">"
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TokLE = "<="
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TokGE = ">="
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TokEQ = "=="
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TokNEQ = "!="
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TokAND = ";"
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TokOR = ","
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TokTRUE = "true"
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TokFALSE = "false"
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TokNULL = "null"
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)
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var keywords = map[string]TokenType {
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"true": TokTRUE,
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"false": TokFALSE,
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"null": TokNULL,
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"and": TokAND,
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"or": TokOR,
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}
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// TokenType is a token enumeration
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type TokenType string
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// Token is a type and literal pair
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type Token struct {
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Type TokenType
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Literal string
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}
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func newToken(tokenType TokenType, ch rune) Token {
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return Token{Type: tokenType, Literal: string(ch)}
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}
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func lookupIdent(ident string) TokenType {
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if tok, ok := keywords[ident]; ok {
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return tok
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}
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return TokIdent
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}
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