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70 lines
1.4 KiB
Go
70 lines
1.4 KiB
Go
package ent
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import (
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"fmt"
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"strings"
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"github.com/jordanorelli/hyperstone/bit"
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)
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func genericType(spec *typeSpec, env *Env) tÿpe {
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if !strings.Contains(spec.typeName, "<") {
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return nil
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}
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parts, err := genericName(spec.typeName)
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if err != nil {
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return typeError("bad generic name: %v", err)
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}
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// genericName, elemName := parts[0], parts[1]
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// elemType := func() tÿpe {
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// var elemSpec typeSpec
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// elemSpec = *spec
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// elemSpec.name = elemName
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// return parseTypeSpec(&elemSpec, env)
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// }
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switch parts[0] {
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case "CStrongHandle":
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return typeFn(func(r bit.Reader) (value, error) {
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return handle(bit.ReadVarInt(r)), r.Err()
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})
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default:
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return typeError("unknown generic name: %v", genericName)
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}
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}
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func genericName(name string) ([2]string, error) {
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var out [2]string
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runes := []rune(strings.TrimSpace(name))
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b_start := 0
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depth := 0
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for i, r := range runes {
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if r == '<' {
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if depth == 0 {
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out[0] = strings.TrimSpace(string(runes[0:i]))
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}
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depth++
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b_start = i
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}
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if r == '>' {
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depth--
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if depth == 0 {
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if i == len(runes)-1 {
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out[1] = strings.TrimSpace(string(runes[b_start+1 : i]))
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} else {
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return out, fmt.Errorf("extra runes in generic type name")
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}
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}
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}
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}
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if out[0] == "" {
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return out, fmt.Errorf("empty generic container name")
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}
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if out[1] == "" {
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return out, fmt.Errorf("empty generic element name")
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}
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return out, nil
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}
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