Add an API option to control emission of `#line` directives

- API users can use this to get "clean" output to aid with debugging Slang issues

- Also changes the prefix on intermediate files that Slang dumps, to make them easier to ignore with a regexp

1 files changed, 19 insertions, 0 deletions

diff --git a/slang.h b/slang.h
index a9b69d705..2485a5e57 100644
--- a/slang.h
+++ b/slang.h
@@ -96,6 +96,18 @@ extern "C"
         SLANG_COMPILE_FLAG_NO_CHECKING = 1 << 0, /**< Disable semantic checking as much as possible. */
     };
 
+    /*!
+    @brief Options to control emission of `#line` directives
+    */
+    typedef unsigned int SlangLineDirectiveMode;
+    enum
+    {
+        SLANG_LINE_DIRECTIVE_MODE_DEFAULT = 0,  /**< Default behavior: pick behavior base on target. */
+        SLANG_LINE_DIRECTIVE_MODE_NONE,         /**< Don't emit line directives at all. */
+        SLANG_LINE_DIRECTIVE_MODE_STANDARD,     /**< Emit standard C-style `#line` directives. */
+        SLANG_LINE_DIRECTIVE_MODE_GLSL,         /**< Emit GLSL-style directives with file *number* instead of name */
+    };
+
     typedef int SlangSourceLanguage;
     enum
     {
@@ -177,6 +189,13 @@ extern "C"
         int                     enable);
 
     /*!
+    @brief Set whether (and how) `#line` directives hsould be output.
+    */
+    SLANG_API void spSetLineDirectiveMode(
+        SlangCompileRequest*    request,
+        SlangLineDirectiveMode  mode);
+
+    /*!
     @brief Sets the target for code generation.
     @param ctx The compilation context.
     @param target The code generation target. Possible values are: