Switch fallthrough not supported

[jonathangjertsen]

Describe the bug

Fallthrough statements in switch statements do not exist in the generated go file, instead it just outputs the string "fallthrough".

To Reproduce

package main

templ example(x int) {
    switch x {
        case 0:
            fallthrough
        case 1:
            <p>hey</p>
    }
}

Expected behavior

@example(0) should generate the output <p>hey</p>

templ info output

(✓) os [ goos=windows goarch=amd64 ]
(✓) go [ location=C:\Program Files\Go\bin\go.exe version=go version go1.22.0 windows/amd64 ]
(✓) gopls [ location=C:\Users\jrg\go\bin\gopls.exe version=golang.org/x/tools/gopls v0.16.2 ]
(✓) templ [ location=C:\Users\jrg\go\bin\templ.exe version=v0.2.771 ]

[bcklin]

Golang does not perform fall-through in switch statements. See https://go.dev/tour/flowcontrol/9

[jonathangjertsen]

Golang does not perform fall-through in switch statements. See https://go.dev/tour/flowcontrol/9

Unless you use the fallthrough keyword. 🙂

[a-h]

Thanks for the report.

This should be fairly straightforward to sort out. Need to add a parser and node type for it, and a validator to make sure it only appears as a child of the case statement, and that there there are no nodes between the fallthrough and the next case node.