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deduplicate compile errors for undeclared identifiers

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closes #111
This commit is contained in:
Andrew Kelley 2019-02-20 08:04:46 -05:00
parent 067968c57f
commit 079728752e
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GPG Key ID: 7C5F548F728501A9
3 changed files with 38 additions and 8 deletions
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19
src/ir.cpp
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@ -3674,6 +3674,22 @@ static IrInstruction *ir_gen_null_literal(IrBuilder *irb, Scope *scope, AstNode
return ir_build_const_null(irb, scope, node);
}
static void populate_invalid_variable_in_scope(CodeGen *g, Scope *scope, AstNode *node, Buf *var_name) {
ScopeDecls *scope_decls = nullptr;
while (scope != nullptr) {
if (scope->id == ScopeIdDecls) {
scope_decls = reinterpret_cast<ScopeDecls *>(scope);
}
scope = scope->parent;
}
TldVar *tld_var = allocate<TldVar>(1);
init_tld(&tld_var->base, TldIdVar, var_name, VisibModPub, node, &scope_decls->base);
tld_var->base.resolution = TldResolutionInvalid;
tld_var->var = add_variable(g, node, &scope_decls->base, var_name, false,
&g->invalid_instruction->value, &tld_var->base, g->builtin_types.entry_invalid);
scope_decls->decl_table.put(var_name, &tld_var->base);
}
static IrInstruction *ir_gen_symbol(IrBuilder *irb, Scope *scope, AstNode *node, LVal lval) {
Error err;
assert(node->type == NodeTypeSymbol);
@ -3727,8 +3743,9 @@ static IrInstruction *ir_gen_symbol(IrBuilder *irb, Scope *scope, AstNode *node,
return irb->codegen->invalid_instruction;
}
// TODO put a variable of same name with invalid type in global scope
// put a variable of same name with invalid type in global scope
// so that future references to this same name will find a variable with an invalid type
populate_invalid_variable_in_scope(irb->codegen, scope, node, variable_name);
add_node_error(irb->codegen, node, buf_sprintf("use of undeclared identifier '%s'", buf_ptr(variable_name)));
return irb->codegen->invalid_instruction;
}

24
test/compile_errors.zig
View File

@ -1,6 +1,22 @@
const tests = @import("tests.zig");
pub fn addCases(cases: *tests.CompileErrorContext) void {
cases.addCase(x: {
var tc = cases.create(
"deduplicate undeclared identifier",
\\export fn a() void {
\\ x += 1;
\\}
\\export fn b() void {
\\ x += 1;
\\}
,
".tmp_source.zig:2:5: error: use of undeclared identifier 'x'",
);
tc.expect_exact = true;
break :x tc;
});
cases.addTest(
"export generic function",
\\export fn foo(num: var) i32 {
@ -2280,7 +2296,6 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
\\}
,
".tmp_source.zig:2:5: error: use of undeclared identifier 'i'",
".tmp_source.zig:2:12: error: use of undeclared identifier 'i'",
);
cases.add(
@ -5618,8 +5633,7 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
".tmp_source.zig:2:26: error: vector element type must be integer, float, or pointer; '@Vector(4, u8)' is invalid",
);
cases.add(
"compileLog of tagged enum doesn't crash the compiler",
cases.add("compileLog of tagged enum doesn't crash the compiler",
\\const Bar = union(enum(u32)) {
\\ X: i32 = 1
\\};
@ -5631,7 +5645,5 @@ pub fn addCases(cases: *tests.CompileErrorContext) void {
\\pub fn main () void {
\\ comptime testCompileLog(Bar{.X = 123});
\\}
,
".tmp_source.zig:6:5: error: found compile log statement"
);
, ".tmp_source.zig:6:5: error: found compile log statement");
}

3
test/tests.zig
View File

@ -716,7 +716,8 @@ pub const CompileErrorContext = struct {
for (self.case.expected_errors.toSliceConst()) |expected| {
if (mem.indexOf(u8, stderr, expected) == null) {
warn(
\\\n=========== Expected compile error: ============
\\
\\=========== Expected compile error: ============
\\{}
\\
, expected);