stringInvalidOps.frag ERROR: 0:5: ':' : wrong operand types: no operation ':' exists that takes a left-hand operand of type ' const string' and a right operand of type ' const string' (or there is no acceptable conversion) ERROR: 0:6: '+' : wrong operand types: no operation '+' exists that takes a left-hand operand of type ' const string' and a right operand of type ' const string' (or there is no acceptable conversion) ERROR: 0:7: '*' : wrong operand types: no operation '*' exists that takes a left-hand operand of type ' const string' and a right operand of type ' const string' (or there is no acceptable conversion) ERROR: 0:7: '+' : wrong operand types: no operation '+' exists that takes a left-hand operand of type ' const string' and a right operand of type ' const string' (or there is no acceptable conversion) ERROR: 4 compilation errors. No code generated. Shader version: 450 Requested GL_EXT_debug_printf ERROR: node is still EOpNull! 0:4 Function Definition: main( ( global void) 0:4 Function Parameters: 0:5 Sequence 0:5 Constant: 0:5 "def" 0:6 Constant: 0:6 "o" 0:7 Constant: 0:7 "o" 0:? Linker Objects Linked fragment stage: Shader version: 450 Requested GL_EXT_debug_printf ERROR: node is still EOpNull! 0:4 Function Definition: main( ( global void) 0:4 Function Parameters: 0:5 Sequence 0:5 Constant: 0:5 "def" 0:6 Constant: 0:6 "o" 0:7 Constant: 0:7 "o" 0:? Linker Objects