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Sema: improve error message for mismatched for loop lengths

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This commit is contained in:
Andrew Kelley
2023-02-18 12:26:22 -07:00
parent b13745ac03
commit 22965e6fcb
3 changed files with 52 additions and 4 deletions
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16
src/Module.zig
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@@ -2462,6 +2462,13 @@ pub const SrcLoc = struct {
};
return nodeToSpan(tree, src_node);
},
.for_input => |for_input| {
const tree = try src_loc.file_scope.getTree(gpa);
const node = src_loc.declRelativeToNodeIndex(for_input.for_node_offset);
const for_full = tree.fullFor(node).?;
const src_node = for_full.ast.inputs[for_input.input_index];
return nodeToSpan(tree, src_node);
},
.node_offset_bin_lhs => |node_off| {
const tree = try src_loc.file_scope.getTree(gpa);
const node = src_loc.declRelativeToNodeIndex(node_off);
@@ -3114,6 +3121,14 @@ pub const LazySrcLoc = union(enum) {
/// The source location points to the RHS of an assignment.
/// The Decl is determined contextually.
node_offset_store_operand: i32,
/// The source location points to a for loop input.
/// The Decl is determined contextually.
for_input: struct {
/// Points to the for loop AST node.
for_node_offset: i32,
/// Picks one of the inputs from the condition.
input_index: u32,
},
pub const nodeOffset = if (TracedOffset.want_tracing) nodeOffsetDebug else nodeOffsetRelease;
@@ -3200,6 +3215,7 @@ pub const LazySrcLoc = union(enum) {
.node_offset_init_ty,
.node_offset_store_ptr,
.node_offset_store_operand,
.for_input,
=> .{
.file_scope = decl.getFileScope(),
.parent_decl_node = decl.src_node,