aporia-ai/kubesurvival

package lexer

// Token represents a lexical token.
type TokenType int

const (
    // Special tokens
    ILLEGAL TokenType = iota
    EOF

    // Symbols
    LPAREN // (
    RPAREN // )
    COMMA  // ,
    COLON  // :

    // Keywords
    POD    // pod
    CPU    // cpu
    MEMORY // memory
    GPU    // gpu

    // Operators
    ADD // +
    MUL // *

    // Literals
    INTEGER // 5
    STRING  // "100m"

    // Errors
    BADSTRING // "abc
    BADESCAPE // \q
)

// Position specifies the line and character position of a token.
// The Column and Line are both zero-based indexes.
type Position struct {
    Line   int
    Column int
}

type Token struct {
    TokenType TokenType
    Lexeme    string
    Position  Position
}

var tokens = [...]string{
    ILLEGAL: "ILLEGAL",
    EOF:     "EOF",

    // Symbols
    LPAREN: "(",
    RPAREN: ")",
    COMMA:  ",",
    COLON:  ":",

    // Keywords
    POD:    "pod",
    CPU:    "cpu",
    MEMORY: "memory",
    GPU:    "gpu",

    // Operators
    ADD: "+",
    MUL: "*",

    // Literals
    INTEGER: "INTEGER",
    STRING:  "STRING",

    // Errors
    BADSTRING: "BADSTRING",
}

// String returns the string representation of the token.
func (tok TokenType) String() string {
    if tok >= 0 && tok < TokenType(len(tokens)) {
        return tokens[tok]
    }
    return ""
}