Resolve issue #700: allow initializers on struct members.

Test/baseResults/hlsl.init.frag.out

 hlsl.init.frag
+WARNING: 0:40: 'typedef' : struct-member initializers ignored 
+WARNING: 0:40: 'typedef' : struct-member initializers ignored 
+
 Shader version: 450
 gl_FragCoord origin is upper left
 0:? Sequence
@@ -152,6 +155,7 @@ gl_FragCoord origin is upper left
 0:?     'single2' (global structure{temp 2-component vector of uint v})
 0:?     'single3' (global structure{temp structure{temp int f} s1})
 0:?     'single4' (global structure{temp structure{temp 2-component vector of uint v} s1})
+0:?     'anon@0' (layout(row_major std140 ) uniform block{layout(row_major std140 ) uniform float a, layout(row_major std140 ) uniform float b, layout(row_major std140 ) uniform float c})
 
 
 Linked fragment stage:
@@ -310,10 +314,11 @@ gl_FragCoord origin is upper left
 0:?     'single2' (global structure{temp 2-component vector of uint v})
 0:?     'single3' (global structure{temp structure{temp int f} s1})
 0:?     'single4' (global structure{temp structure{temp 2-component vector of uint v} s1})
+0:?     'anon@0' (layout(row_major std140 ) uniform block{layout(row_major std140 ) uniform float a, layout(row_major std140 ) uniform float b, layout(row_major std140 ) uniform float c})
 
 // Module Version 10000
 // Generated by (magic number): 80001
-// Id's are bound by 97
+// Id's are bound by 100
 
                               Capability Shader
                1:             ExtInstImport  "GLSL.std.450"
@@ -361,8 +366,18 @@ gl_FragCoord origin is upper left
                               Name 90  "input"
                               Name 95  "c4"
                               Name 96  "b5"
+                              Name 97  "Constants"
+                              MemberName 97(Constants) 0  "a"
+                              MemberName 97(Constants) 1  "b"
+                              MemberName 97(Constants) 2  "c"
+                              Name 99  ""
                               Decorate 88(@entryPointOutput) Location 0
                               Decorate 90(input) Location 0
+                              MemberDecorate 97(Constants) 0 Offset 0
+                              MemberDecorate 97(Constants) 1 Offset 4
+                              MemberDecorate 97(Constants) 2 Offset 8
+                              Decorate 97(Constants) Block
+                              Decorate 99 DescriptorSet 0
                2:             TypeVoid
                3:             TypeFunction 2
                6:             TypeFloat 32
@@ -437,6 +452,9 @@ gl_FragCoord origin is upper left
        90(input):     89(ptr) Variable Input
           95(c4):     22(ptr) Variable Private
           96(b5):     22(ptr) Variable Private
+   97(Constants):             TypeStruct 6(float) 6(float) 6(float)
+              98:             TypePointer Uniform 97(Constants)
+              99:     98(ptr) Variable Uniform
 4(ShaderFunction):           2 Function None 3
                5:             Label
           62(a2):     61(ptr) Variable Function

Test/hlsl.init.frag

@@ -34,3 +34,8 @@ float4 ShaderFunction(float4 input) : COLOR0
 
     return input * a1;
 }
+
+cbuffer Constants
+{
+    float a = 1.0f, b, c = 2.0f;
+};

glslang/Include/revision.h

@@ -2,5 +2,5 @@
 // For the version, it uses the latest git tag followed by the number of commits.
 // For the date, it uses the current date (when then script is run).
 
-#define GLSLANG_REVISION "Overload400-PrecQual.1804"
+#define GLSLANG_REVISION "Overload400-PrecQual.1805"
 #define GLSLANG_DATE "02-Feb-2017"

hlsl/hlslGrammar.cpp

@@ -1758,6 +1758,16 @@ bool HlslGrammar::acceptStructDeclarationList(TTypeList*& typeList)
 
             acceptPostDecls(member.type->getQualifier());
 
+            // EQUAL assignment_expression
+            if (acceptTokenClass(EHTokAssign)) {
+                parseContext.warn(idToken.loc, "struct-member initializers ignored", "typedef", "");
+                TIntermTyped* expressionNode = nullptr;
+                if (! acceptAssignmentExpression(expressionNode)) {
+                    expected("initializer");
+                    return false;
+                }
+            }
+
             // success on seeing the SEMICOLON coming up
             if (peekTokenClass(EHTokSemicolon))
                 break;