On 3/17/20 11:41 PM, Martin Sebor wrote:
The script reports errors by emitting them as #error directives into
standard output (so they cause the build to fail). Should this new
routine do the same thing? (/dev/stderr is also not available on all
flavors of UNIX but I'm not sure how much that matters here.)
Good point Martin. Yes, #error emission works fine here:
./options.h:1:2: error: #error Empty option argument 'Enum' during parsing of:
Enum (diagnostic_prefixing_rule) String(once)
Value(DIAGNOSTICS_SHOW_PREFIX_ONCE)
1 | #error Empty option argument 'Enum' during parsing of: Enum
(diagnostic_prefixing_rule) String(once) Value(DIAGNOSTICS_SHOW_PREFIX_ONCE)
| ^~~~~
There's updated version of the patch.
Martin
>From e6ceafae43ab8735f0ad3d18a0cfc7f3dfbfd3ec Mon Sep 17 00:00:00 2001
From: Martin Liska <[email protected]>
Date: Fri, 21 Feb 2020 10:40:57 +0100
Subject: [PATCH] optgen: make more sanity checks for enums.
gcc/ChangeLog:
2020-03-17 Martin Liska <[email protected]>
* opt-functions.awk (opt_args_non_empty): New function.
* opt-read.awk: Use the function for various option arguments.
---
gcc/opt-functions.awk | 10 ++++++++++
gcc/opt-read.awk | 10 +++++-----
2 files changed, 15 insertions(+), 5 deletions(-)
diff --git a/gcc/opt-functions.awk b/gcc/opt-functions.awk
index 2f0442dc563..b4952b89315 100644
--- a/gcc/opt-functions.awk
+++ b/gcc/opt-functions.awk
@@ -72,6 +72,16 @@ function opt_args(name, flags)
return flags
}
+# If FLAGS contains a "NAME(...argument...)" flag, return the value
+# of the argument. Print error message otherwise.
+function opt_args_non_empty(name, flags, description)
+{
+ args = opt_args(name, flags)
+ if (args == "")
+ print "#error Empty option argument '" name "' during parsing of: " flags
+ return args
+}
+
# Return the Nth comma-separated element of S. Return the empty string
# if S does not contain N elements.
function nth_arg(n, s)
diff --git a/gcc/opt-read.awk b/gcc/opt-read.awk
index a2e16f29aff..9bb9dfcf6ca 100644
--- a/gcc/opt-read.awk
+++ b/gcc/opt-read.awk
@@ -81,8 +81,8 @@ BEGIN {
}
else if ($1 == "Enum") {
props = $2
- name = opt_args("Name", props)
- type = opt_args("Type", props)
+ name = opt_args_non_empty("Name", props)
+ type = opt_args_non_empty("Type", props)
unknown_error = opt_args("UnknownError", props)
enum_names[n_enums] = name
enum_type[name] = type
@@ -93,9 +93,9 @@ BEGIN {
}
else if ($1 == "EnumValue") {
props = $2
- enum_name = opt_args("Enum", props)
- string = opt_args("String", props)
- value = opt_args("Value", props)
+ enum_name = opt_args_non_empty("Enum", props)
+ string = opt_args_non_empty("String", props)
+ value = opt_args_non_empty("Value", props)
val_flags = "0"
val_flags = val_flags \
test_flag("Canonical", props, "| CL_ENUM_CANONICAL") \
--
2.25.1
