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52 lines
1002 B
Go
52 lines
1002 B
Go
package token
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// Type is a specific type of int which describes the symbols.
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type Type int
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// Token describes the letter(s) or symbol, is a result of the lexer.
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type Token struct {
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Type Type
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Literal string
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Start int // including the first char
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End int // including the last char
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}
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// /about/{fullname:alphabetical}
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// /profile/{anySpecialName:string}
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// {id:uint64 range(1,5) else 404}
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// /admin/{id:int eq(1) else 402}
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// /file/{filepath:file else 405}
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const (
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EOF = iota // 0
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ILLEGAL
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// Identifiers + literals
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LBRACE // {
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RBRACE // }
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// PARAM_IDENTIFIER // id
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COLON // :
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LPAREN // (
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RPAREN // )
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// PARAM_FUNC_ARG // 1
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COMMA
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IDENT // string or keyword
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// Keywords
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// keywords_start
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ELSE // else
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// keywords_end
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INT // 42
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)
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var keywords = map[string]Type{
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"else": ELSE,
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}
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// LookupIdent receives a series of chars
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// and tries to resolves the token type.
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func LookupIdent(ident string) Type {
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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 IDENT
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}
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