DoxigAlpha
std › zig › Ast › tokensToSpan

tokensToSpan

Function parameters

Parameters

#
tree:*const Ast
start:Ast.TokenIndex
end:Ast.TokenIndex
main:Ast.TokenIndex

Index into `tokens`, or null.

Types

#
OptionalTokenIndex
Index into `tokens`, or null.
TokenOffset
A relative token index.
OptionalTokenOffset
A relative token index, or null.
full
Fully assembled AST node information.
ExtraIndex
Index into `extra_data`.

Functions in this namespace

Functions

#
parse
Result should be freed with tree.deinit() when there are
renderAlloc
`gpa` is used for allocating the resulting formatted source code.
errorOffset
Returns an extra offset for column and byte offset of errors that
legacyAsm
To be deleted after 0.15.0 is tagged

Source

Implementation

#
pub fn tokensToSpan(tree: *const Ast, start: Ast.TokenIndex, end: Ast.TokenIndex, main: Ast.TokenIndex) Span {
    var start_tok = start;
    var end_tok = end;

    if (tree.tokensOnSameLine(start, end)) {
        // do nothing
    } else if (tree.tokensOnSameLine(start, main)) {
        end_tok = main;
    } else if (tree.tokensOnSameLine(main, end)) {
        start_tok = main;
    } else {
        start_tok = main;
        end_tok = main;
    }
    const start_off = tree.tokenStart(start_tok);
    const end_off = tree.tokenStart(end_tok) + @as(u32, @intCast(tree.tokenSlice(end_tok).len));
    return Span{ .start = start_off, .end = end_off, .main = tree.tokenStart(main) };
}